JHM Intake Manifold Spacers for cooler intake temps and more power (NEW!)

[jaybquick@JHM]

Check them out here and our low intro price. -> http://www.jhmotorsports.com/shop/ca...h=21_56_61_240






View the trailer for our FREE included 52 minute long install DVD. HERE

Fitment: 4.2L 40v (5 valve per cylinder) V8 in the B6/B7 S4, C5 A6 and others with the 4.2L 40v V8.

Our kit includes the following.
1 - JHM intake spacer how to video.
2 -JHM intake spacers -10mm thick (1 for each side of the intake)
4 -Intake gaskets (2 for each side of the spacer)
14 -longer bolts (7 for each side of the intake)
4 - longer intake alignment studs (2 for each side of the intake)
3 - stainless hose clamps (for misc one time use clamps removed during the install)
Optional Intake Elbow Heater Bypass kit for a low price, see dropdown box below. This helps keep the intake temps even cooler and takes 1 minute to install.



What do they do?
They help bring your intake temps down by insulating the intake manifold from the heat coming from the cylinder heads due to combustion. Thus creating a cooler and denser intake charge which helps add more tq and hp, gear after gear! They also add a little more torque down low due to the slightly longer runner created by the spacer. All in all a great mod for the money. With JHMs testing we found a gain everywhere in the rev range from 2000 rpm to 7000 rpm. This was done with acceleration rate calculations in 3rd gear from logs. The BEST part is that we saw that the car didn't slow down after repeated pulls due to an extremely heat soaked intake manifold bringing the intake temps up. Bottom line, the longer we beat on it the better it performed vs. the tests without the spacers.


MORE PRODUCTS IN THE WORKS!

[beemercer]

Quick question, would you not recommend running the the heater bypass in colder climates. I live in Massachusetts, and based on the product description it seems like the stock heater elbow would serve some purpose for me. Really I'm interested in how serious the consequences for removing the stock heater elbow would be in cold weather?

[jaybquick@JHM]

Quick question, would you not recommend running the the heater bypass in colder climates. I live in Massachusetts, and based on the product description it seems like the stock heater elbow would serve some purpose for me. Really I'm interested in how serious the consequences for removing the stock heater elbow would be in cold weather?

The intake spacers are fine in any climate but yes there is concer with the heater bypass mod. I would suggest using it during the rest of the year for those with cold winters. Out here in CA we never see temps below freezing except maybe one or 2 rare days or if we go up into the mountains. It is only 2 hose clamps and you only lose an ounce or two of coolant so it takes only a minute or so to undo. I haven't had anyone brave enough yet to find out at exactly what temps they would start experiencing the sticky throttle plates with this deleted. I just put 32f to be safe but I bet it is fine plenty lower than.

[beemercer]

The intake spacers are fine in any climate but yes there is concer with the heater bypass mod. I would suggest using it during the rest of the year for those with cold winters. Out here in CA we never see temps below freezing except maybe one or 2 rare days or if we go up into the mountains. It is only 2 hose clamps and you only lose an ounce or two of coolant so it takes only a minute or so to undo. I haven't had anyone brave enough yet to find out at exactly what temps they would start experiencing the sticky throttle plates with this deleted. I just put 32f to be safe but I bet it is fine plenty lower than.

Thanks. I just saw the other thread specifically related to the heater elbow bypass ha ha. But this answers my question; definitely getting the manifold spacers though once i get some cash (they are even listed in my future mods in my sig ).

[b00st]

jay any logs or anything on this showing gains. we had this same mod on the 1.8T...most considered snake oil. other than being able to put your hand on the manifold...i can't recall anybody see gains from this. like perhaps an acceleration map...stock vs JHM?

[cabracco85]

This is a great product, although mine are not on my car yet. I will be trying out the bypass to see if i get a frozen TB or any sticking of it. Thanks again jay for great products

[jaybquick@JHM]

jay any logs or anything on this showing gains. we had this same mod on the 1.8T...most considered snake oil. other than being able to put your hand on the manifold...i can't recall anybody see gains from this. like perhaps an acceleration map...stock vs JHM?

You are comparing apples to oranges. Turbo cars do best with excellent intercooling so intake spacers sometimes become a moot point. However they do help when you compare the data over time, pull after pull. I put intake spacers on a lot of B5s.

However, with a naturally aspirated motor you don't have turbos or intercooling so there isn't many other ways to get the intake temps down. This is a mod that you would never feel with the butt dyno, but most mods including chips with these cars aren't that noticeable on the butt dyno. But over time you build the right combination of parts and you will finally have a really fast car. Example, full exhaust + chip + intake spacers + intake elbow heater delete + lightweight rotors + lightweight wheels + more parts as they come available.


Here is the RPM per second acceleration calculations on a mostly stock B6 S4 with just our tuning, 91 octane and only a cat back. It still had all 4 cats in the car w stock downpipes and everything else was stock. We have since done more mods and tuning and the car is substantially faster. We do this kind of math and keep the controls constant (ambient temperature, engine temp and using the same road in 3rd gear)

NOTE: The JHM V3 just indicates what version of our software this car was on at the time of the logging.



As you can see before the intake spacers it would fall off a lot quicker. The intake spacers did build some more torque in the mid range as well and over time made more top end vs. no intake spacers it was falling off. Unfortunately there is no magic bullet with these cars like with a turbo car (upping the boost) so we have to "piece together" our power with the right combination of parts.



Here is a write up I found that really relays the concepts well. I picked the ford 3.8L V6 since it is almost as big as our motor and it has the 2 length runners and flaps in the intake. I could have rewritten such a thing but why reinvent the wheel.

How Intake Spacers Work. . .
First off, let me try to explain how your intake manifold works. It's more complicated than you think! Surely by now you've read enough posts that say longer intake runners are good for low end torque while shorter runners are good for top end horsepower. I know that, now you know that, and Ford knows it too. That's why the 1999-2004 split port V6's have short and long runners. At approximately 3500 RPMs your PCM (computer) will open up the short runners via a butterfly valve called an Intake Manifold Runner Control (IMRC - 2001+). The engine uses the long runners at low RPM for more torque and the short runners at high RPM for more horsepower.

"Resonance" is defined as a vibration. It's the action of moving back and forth. Air in your intake manifold resonates or moves back and forth with the opening and closing of your intake valves. It does not move in a straight line from the air filter to the cylinder at all times as so many people believe. When the intake valve opens, air is pulled into the cylinder by the low pressure created from the downward movement of the piston. When the intake valve closes, the air in the intake is still moving forward towards the valve. There is nothing driving it but inertia at this point. It slams up against the closed intake valve and creates an area of high pressure. This high pressure is then reflected as a wave back up the runner away from the valve. When the pressure wave reaches the intake plenum (a common area shared by all the intake runners), it is then reflected back down the runner towards the valve again. If this pressure wave approaches the valve as it is open, then it will help flow more air into the cylinder. It will actually push more air into the cylinder than the cylinder could suck in by itself. The valve closes and the process repeats again. This whole process results in increased volumetric efficiency (more air entering the cylinders than normal). Since your engine is nothing but a large air pump, more air = more horsepower/torque. The intake runner must be properly sized (length and width) in order to enable the pressure wave to arrive back at the intake valve as it opens for the next cycle. The only drawback of this is that the "resonance tuning" is only effective in a precise RPM band.

An intake spacer will lengthen the runner which causes the air inside of it to have to travel a longer distance. The pressure waves also have a longer distance to travel. They travel at the speed of sound. This doesn't change! Since they have a longer way to travel, they arrive back at the intake valve later. At lower RPMs, obviously, the valves are opening and closing slower. The intake valve reopens later and this can be timed with the intake pulse (with the spacer) in order to create more torque at lower RPMs.

Also, the intake spacer is made out of a heat resistant material. It doesn't soak in engine heat as easily as the aluminum intake manifold will. Colder air = denser air. Denser air takes up less space which means you can fit more of it in the cylinder. Again, more air = more power!

A good intake spacer is made of a phenolic plastic material called G-10. There are other types but they are of a cheaper grade and won't last for long under your hood. The thermal conductivity of aluminum is 2.165 W/cm-K. G-10 is 0.003 W/cm-K. I won't bother explaining what this means in detail but the larger the number, the easier it is for the material to soak in heat. G-10 stays much cooler than your aluminum manifold. It resists heat over 700 times better than aluminum. Because the G-10 is in between the upper and lower manifolds, the upper won't conduct the heat of the lower as easily. Ever notice your car "feels" stronger in the morning when the engine is cold? That's because the intake is cool and hasn't soaked in the engine's heat yet.

And yes we make ours out of this material as well.



Hope this answers your question.

[jaybquick@JHM]

This is a great product, although mine are not on my car yet. I will be trying out the bypass to see if i get a frozen TB or any sticking of it. Thanks again jay for great products

Thanks for being one of the first purchasers. You watch the install video yet? I would definitely like to know about the throttle body bypass and at what temp/weather conditions it becomes a concern.

[bsrpilot44]

hmmmm my votes still out on this mod....iono half way through that trailer to the install video I was like wtf...

But a for JHM putting out new stuff for these cars!

-B

[whartung]

hmmmm my votes still out on this mod....iono half way through that trailer to the install video I was like wtf...

But a for JHM putting out new stuff for these cars!

-B

I think the "trailer" video was as straight forward as it gets. I almost feel like I could do the install without any additional footage.

As for the product itself, I'd be very interested. Its not every day that you run across something that seems so simple and reliable as this for that price. I'm resisting purchasing one right now, as I never want to be the guinea pig for anything. But I'm having trouble. How long is the sale going to last Jason?

[cabracco85]

Thanks for being one of the first purchasers. You watch the install video yet? I would definitely like to know about the throttle body bypass and at what temp/weather conditions it becomes a concern.

Installed it took all of 2 minutes for the bypass mod. I will get more data to you with the cold weather issues in the next few days. If i do have any problem i will note the temp it starts to act up and if the problem presists after the car is at operating temps.

[b00st]

As you can see before the intake spacers it would fall off a lot quicker. The intake spacers did build some more torque in the mid range as well and over time made more top end vs. no intake spacers it was falling off. Unfortunately there is no magic bullet with these cars like with a turbo car (upping the boost) so we have to "piece together" our power with the right combination of parts.

Hope this answers your question.

thanks thats what i was looking for. backed up by the data i was asking for.

i completely agree...its the sum of the RIGHT mods that will get us faster...especially staying NA. every bolt on counts...good products and the sum of the parts should yield us some much bettter results.

thanks for being honest and putting on some good products

[rsquattro]

How many hours would this take to install? And aside from temp. changes, would this be possible to dyno vs. stock?

[beemercer]

How many hours would this take to install? And aside from temp. changes, would this be possible to dyno vs. stock?

The little trailer video says 2-3 hours depending on your previous experience.

[cabracco85]

Thanks for being one of the first purchasers. You watch the install video yet? I would definitely like to know about the throttle body bypass and at what temp/weather conditions it becomes a concern.

I posted in the other thread about some of the finds ive had with this by pass kit.

[rnr1702]

where can I get spacers for my S4....2004 4.2
I'm looking for a spacer that fits at the throttle body...
702-493-0150 Rob

[ieatfishburitos]

where can I get spacers for my S4....2004 4.2

702-493-0150 Rob

Cmon, don't be a lazy ass. The link is listed at the very top of the first post. You click on it and enter an online store, and make the purchase. Or you can see JHM's phone number, email etc all at the bottom of their post. Contact them and make the order. Are you new to the internet or something?

[littleredwagen]

hmmm.... could be a future mod

[KryptoniK]

I didn't see RS4 fitment mentioned anywhere. Would this kit work on an RS4 motor? Or are there slightly different dimensions on the RS4 Intake Manifold that wouldnt allow this kit to be used.

If not, will there be an RS4 version of this kit available anytime soon?

-Dave

[91gl]

hmmm.... should be a future mod

fixed

[91gl]

I didn't see RS4 fitment mentioned anywhere. Would this kit work on an RS4 motor? Or are there slightly different dimensions on the RS4 Intake Manifold that wouldnt allow this kit to be used.

If not, will there be an RS4 version of this kit available anytime soon?

-Dave

this kit will not work on the rs4 since the cylinder heads are different. im sure if there is enough interest, jay could put a batch into production

[GhostSquadGarage]

Whoever is comparing a 4.2L V8 to a 1.8L 4cyl is just not right in the head.
Even the 2.0t doesn't come CLOSE to the heat that this engine generates under the hood.
I've originally worked on a few with Vorsteiner hoods and never thought it was that bad till we had one with the stock hood on. About 5mins in I was dripping in sweat from the engine and that was after a 30min cooldown. I actually think the Voresteiner hood will help with HP and overall effeciancy as well on the car. The temps are drastically better with the venting it provides.
ANYTHING you're doing on the 4.2L to reduce heat is going to both show and feel gains especially after it's been running for a few minutes.

Props to JHM this looks like a killer kit at a more than reasonable price.
Jay shoot me a PM if you'd like me to throw this on one of my s4's.
We're getting ready to do baseline dyno's and then release our full intake for it in a month or two and do the after effects. This would be a great addition to have on the car tog et more potential out of the engine.

[jaybquick@JHM]

First off, Sorry for the late responses, been busy working on more stuff for you guys.

But a for JHM putting out new stuff for these cars!

-B

Thanks man. Just getting started.

I think the "trailer" video was as straight forward as it gets. I almost feel like I could do the install without any additional footage.

As for the product itself, I'd be very interested. Its not every day that you run across something that seems so simple and reliable as this for that price. I'm resisting purchasing one right now, as I never want to be the guinea pig for anything. But I'm having trouble. How long is the sale going to last Jason?

Sale should be on for at least a couple more weeks, maybe longer.

Installed it took all of 2 minutes for the bypass mod. I will get more data to you with the cold weather issues in the next few days. If i do have any problem i will note the temp it starts to act up and if the problem presists after the car is at operating temps.

Looking forward to seeing the data and I will check the other thread. Thanks Ken

thanks thats what i was looking for. backed up by the data i was asking for.

i completely agree...its the sum of the RIGHT mods that will get us faster...especially staying NA. every bolt on counts...good products and the sum of the parts should yield us some much bettter results.

thanks for being honest and putting on some good products

No problem. I am always as honest as possible. I think too many products get hyped. One our mottos is "Horsepower over Hype" and then the public will speak for us and we won't need to hype them ourselves.

How many hours would this take to install? And aside from temp. changes, would this be possible to dyno vs. stock?

I would say 2 to 4 hours depending on experience with cars. This is not counting at least watching the video once fully through to get a plan of attack. I could probably due it in an hour or so now that I have done a couple, but I can never stay working on one thing for that long running a business and all.

You could dyno vs. stock, you would just have to approach it like you woul an intercooler. Do at least 3 back to back with no cooldown pulls before. And then do the same after. Both in ambient temps within 5 degrees. A big key is keeping the controls constant. But this mod has been proven in tons of cars over the years to pick up 2 to 10 hp at certain spots in the band. It all depends on the motor, the mods and the conditions. But for the price it is always a nice piece to the big puzzle.

I didn't see RS4 fitment mentioned anywhere. Would this kit work on an RS4 motor? Or are there slightly different dimensions on the RS4 Intake Manifold that wouldnt allow this kit to be used.

If not, will there be an RS4 version of this kit available anytime soon?

-Dave

I just bought some RS4 intake gaskets to start drawing them up. But I need a local guy in the SF bay area or Sacramento area that would be willing to come to me so I can take some measurements between the hood and intake to see how thick is safe. I like 10mm since it is just tall enough to really help with bringing the temp down and not too tall. So if I had a guy that could let me look at his car to confirm thickness. I would also most likely install the first set on his car FREE of charge once I made some, to verify fitment, make a video and put the full parts list together. Since there is no aftermarket source yet for intake gaskets the RS4 setup will probably be $50 or more expensive depending on how cheap i can find the gaskets. Retail on them is around $35 each and the spacers need 4. OUCH.

Whoever is comparing a 4.2L V8 to a 1.8L 4cyl is just not right in the head.
Even the 2.0t doesn't come CLOSE to the heat that this engine generates under the hood.
I've originally worked on a few with Vorsteiner hoods and never thought it was that bad till we had one with the stock hood on. About 5mins in I was dripping in sweat from the engine and that was after a 30min cooldown. I actually think the Voresteiner hood will help with HP and overall effeciancy as well on the car. The temps are drastically better with the venting it provides.
ANYTHING you're doing on the 4.2L to reduce heat is going to both show and feel gains especially after it's been running for a few minutes.

Props to JHM this looks like a killer kit at a more than reasonable price.
Jay shoot me a PM if you'd like me to throw this on one of my s4's.
We're getting ready to do baseline dyno's and then release our full intake for it in a month or two and do the after effects. This would be a great addition to have on the car tog et more potential out of the engine.

Thanks for the props. PM sent.

[durrmcdanks]

Just installed mine defiantly felt a difference; beautiful product Jay. Gets rid of some of that ridiculous heat.

[shifty711]

Hmm, interesting.

I had a product similar to this on my 350z.

But wouldnt most of the gains be because of new increased runner lenght of the manifold? Wouldnt that typically increase TQ.

[jaybquick@JHM]

Just installed mine defiantly felt a difference; beautiful product Jay. Gets rid of some of that ridiculous heat.

No problem man. More coming!

Hmm, interesting.

I had a product similar to this on my 350z.

But wouldnt most of the gains be because of new increased runner lenght of the manifold? Wouldnt that typically increase TQ.

Yes sir. With our before and after RPM/Sec calculations it picked up pretty much the whole RPM band on this car.

[poopypants]

I've originally worked on a few with Vorsteiner hoods and never thought it was that bad till we had one with the stock hood on. About 5mins in I was dripping in sweat from the engine and that was after a 30min cooldown. I actually think the Voresteiner hood will help with HP and overall effeciancy as well on the car. The temps are drastically better with the venting it provides.
ANYTHING you're doing on the 4.2L to reduce heat is going to both show and feel gains especially after it's been running for a few minutes.

Props to JHM this looks like a killer kit at a more than reasonable price.

I totally agree. Also some one needs to come out with some kind of vented hood for the B6 model. It really sux, even with the C/F hoods out there since majority of the heat is still trapped underneath.

[chaos2984]

Is thier any gain from this. Any noticable difference on the dyno?? How much did it drop temps in the summer time. and the price is really reasonable.

[Bravest NY S4]

Just ordered it... curious to see what the results'll be.
I'll post after it gets installed and we take the S for a dry run!

[4Rings3Liters]

Any chance of these ever being produced for the 3.0?

[cabracco85]

Is thier any gain from this. Any noticable difference on the dyno?? How much did it drop temps in the summer time. and the price is really reasonable.

There is gains to be had along with other mods. Its not like a turbo car were a single mod will give alot of power from. Anything that will help keep heat out of the engine should help. It probally drops 60 degrees. But i am not sure as i dont have mine installed yet as it is really cold here and i want to do some testing.

[jaybquick@JHM]

Any chance of these ever being produced for the 3.0?

The 3.0L looks like it would use a wide port 2.7t/2.8L spacer with 2 paper gaskets between the head and the spacers then the oe rubber gaskets between the intake spacer and intake. I know the bolt patterns line up I just haven't cofirmed if the 3.0l is wide or narrow port. Since the 2.8l is wide I would be 90% certain that is what they are.

Email me and I can put something together for you to try. If it doesn't look like it will fit, send it back. You would just be out the time for unbolting your intake. I am quite certain it will work though.

[rnr1702]

just new to this sight...hahaha ordered and waiting for product to install. I'll post what ever difference I find post install. Having a blast with this car so far.

[GhostSquadGarage]

Welcome aboard RNR !!

[Bravest NY S4]

Jay, your killin-me....can't get started till I get your components

[rnr1702]

Hey Jay....what's the time line looking like? No worries, just want to get started ASAP

[Bravest NY S4]

I got the "shipped"email thanks!!

[Dan@JHM]

Hey Jay....what's the time line looking like? No worries, just want to get started ASAP

we have them in stock and if you order now your next in line :)

[Bravest NY S4]

Jay, fed-ex just delivered the goods...now we can start to TRANSFORM the S's intake and exhaust so she can REALLY breath! Don't be surprised if you get more business from me in the near future. Thanks again

[jaybquick@JHM]

just new to this sight...hahaha ordered and waiting for product to install. I'll post what ever difference I find post install. Having a blast with this car so far.

Thanks and let us know. I think I know which order you are. I am still trying to scrape up some more gaskets. I keep running everyone out.

I have a box of 100 gaskets coming from Europe soon. Kind of frsutrating to build something and be waiting on gaskets. I guess they didn't expect such a demand yet for this new of a car.

Jay, fed-ex just delivered the goods...now we can start to TRANSFORM the S's intake and exhaust so she can REALLY breath! Don't be surprised if you get more business from me in the near future. Thanks again

Glad to hear. Let me know how it goes. What did you think of the video?