JHM Intake Heater Bypass Kit for cooler intake temps (NEW!)

[jaybquick@JHM]

Check it out here for only $6. -> http://www.jhmotorsports.com/shop/ca...h=21_56_61_240








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 - Brass fitting to connect lines together
2 - stainless hose clamps (to replace the one time use clamps removed during the install)




What does this kit do?
From the factory the 4.2L V8 comes equipped with 2 coolant lines that heat up the intake elbow between the throttle body and the intake manifold. Why do the do this? This is a precaution for climates that are colder than 32f. They heat the intake elbow up to warm up the throttle body to help prevent throttle plate icing and a sticky throttle. So by warming up the intake elbow with 200f coolant this won't happen once the car is warm. However this is unnecessary in temps above 32f and only slows your car down by heating up the intake air. And the best part is that it can be installed or removed in only a minute or 2 and can't be seen once your engine cover is installed. This kind of mod has been done on other such cars like Mustangs and Subarus for years. We have found that this modification works great to keep your car faster once warmed up instead of slowing down when the hot coolant begins running through the elbow. With this modification and our JHM intake spacers togther the gains are excellent for the money spent.

MORE PRODUCTS IN THE WORKS!

[Bravest NY S4]

So this mod wouldn't be ideal during the cold NY winter months?

[40valve]

Hey Jay, I've sent in my SS kit to be upgraded/checked out so can I PayPal you some funds and when you return the SS can you just drop it in there?

[jaybquick@JHM]

So this mod wouldn't be ideal during the cold NY winter months?

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.

Hey Jay, I've sent in my SS kit to be upgraded/checked out so can I PayPal you some funds and when you return the SS can you just drop it in there?

Sounds good to me. Just state all that in the comments of the paypal invoice so I can easily put the two together.

Thanks.

[ieatfishburitos]

Cool! I'll be ordering one soon.

[cabracco85]

I will be trying this out on my car to see if the tb sticks. I will post back in a few days and let everyone know the results.

[Slobo7x]

lol at the price.

I had this done on my 300zx but it was slightly more complicated then this. No effect in winter whatsoever. This can be bought at any autoparts store, buisness is not that bad is it?

[Justincredible]

lol at the price.

I had this done on my 300zx but it was slightly more complicated then this. No effect in winter whatsoever. This can be bought at any autoparts store, business is not that bad is it?

LOL that's odd I don't remember you thinking of this or taking the time to develop something at little to no profit margin. I think the price shows the fact that this is not a for profit part.

That's the spirit lets bash anyone developing little parts or thinking out side of the box

[jaybquick@JHM]

lol at the price.

I had this done on my 300zx but it was slightly more complicated then this. No effect in winter whatsoever. This can be bought at any autoparts store, buisness is not that bad is it?

Yup it has been done for years. I have had this on Mustangs for years with no issues, but as a business I have to fully inform people before having them disable something that engineers spent a lot of time on and decided the car needed. Just not good business. We primarily wanted to offer it as a service to those too busy to spend the time to figure it out and an option for an intake spacer kit. The Audi community is definitely different from the 300zx community.

Bottom line, I am just happy to share the info since I have NEVER seen anyone share these kind of mods for this platform. If they go to their local store great. I have just had experience doing similar mods in the past and not putting them in my store for the B5s. People would hear about it then email me, then dealing with emails over such a thing would be excess work load for me. I get a lot of emails to begin with so at the very least if this gets the info out there, then it served its point.

Also some people will buy from a company that supports their platform with new parts and ideas in order to support the company so that more products and development could be made. I thought this would go without saying.

Thanks for the input and it is nice to see another platform that has benefited from this to bring to the mix.

[40valve]

I knew hate on JHM will start soon.
I mean seriously, it will cost you as much if not more to pick up those parts at the local store. I'd rather support someone that actually give a shit about our community and is an active member in it.

For $6 this is one of those mods that you just have to do because it costs you nothing really.

[whartung]

I knew hate on JHM will start soon.
I mean seriously, it will cost you as much if not more to pick up those parts at the local store. I'd rather support someone that actually give a shit about our community and is an active member in it.

For $6 this is one of those mods that you just have to do because it costs you nothing really.

I couldn't agree more. The difference between 6 dollars at JHM and 5 dollars at an auto parts store is something I couldn't care less about, so why not support Jason?

If I decide to get the intake kit, I will definitely be ordering these parts as well, and swapping them out from winter to summer regardless. it gets too cold here too risk it. Sub zero outside right now. The only thing keeping me warm is four layers of clothing and a couple beers.

[cabracco85]

I couldn't agree more. The difference between 6 dollars at JHM and 5 dollars at an auto parts store is something I couldn't care less about, so why not support Jason?

If I decide to get the intake kit, I will definitely be ordering these parts as well, and swapping them out from winter to summer regardless. it gets too cold here too risk it. Sub zero outside right now. The only thing keeping me warm is four layers of clothing and a couple beers.

It is really cold here too, i just did this mod on my car. We will see how it goes in the next few days to see if i run into any problems with the tb sticking. I will post back in a few days and let everyone know how my car reacted in the cold weather with this mod.

[Slobo7x]

LOL that's odd I don't remember you thinking of this or taking the time to develop something at little to no profit margin. I think the price shows the fact that this is not a for profit part.

That's the spirit lets bash anyone developing little parts or thinking out side of the box

I'm not bashing anyone, i'm just saying this mod is pointless. Most people do this to have less crap around their engine bay.

Maybe i should find a lighter valve stem cap and post about it..get my drift?

[Bravest NY S4]

NOW-NOW MEN....lets get along and not forget that we have a common interest here.

[Bravest NY S4]

It is really cold here too, i just did this mod on my car. We will see how it goes in the next few days to see if i run into any problems with the tb sticking. I will post back in a few days and let everyone know how my car reacted in the cold weather with this mod.

Defntly get back to us on that...shit is REAL cold over on the East-side of things. I know it isn't a joke out where your're at either.
Gotta love an inexpensive mod!

[ahwest]

i checked on my 2004 s4 avant and i didnt see those two hoses at all???

[Captain Insano]

I'm not bashing anyone, i'm just saying this mod is pointless. Most people do this to have less crap around their engine bay.

Maybe i should find a lighter valve stem cap and post about it..get my drift?

I actually disagree with you, but we are all entitled to our own opinions (please see my last sentence in this post)....

Just FYI, I did this mod on my STi (several different mfgs do this with their TBs) and it had no ill affects whatsoever in seriously cold winters on the throttle body behavior (we see -25 F windchills at least a couple times in winter usually and sometimes lower).

Jay is being on the extreme safe side rating it at 32 F. You can run this mod in much, much colder temps without issues.

This is one of those little mods that in the long run when you do lots of stuff to help cool intake temps it all adds up and helps. I will do this mod soon. Very similar to a crank pulley on many other cars, a cold air intake, or lighter wheels. Some do more and some do less. Most can't be felt by themselves, but it's the sum of the parts. Not just each part by itself.

If you want to just look at each part by itself and what it can do I would probably never mod my car. Example - In reality, you probably get just as much or nearly as much from this mod for $6 as you do from a $1500 catback. So what do you think? Are they worth it? My opinion - by themselves it's debatable (though I don't mind spending $6 on a mod - maybe the cheapest ever) but if you do a complete exhaust that OEM catback becomes the bottleneck and might be worth it.

These cars get seriously hot under the hood especially in summer temps. Anything you can do to help minimize intake temps is good. At $6 this mod is win/win. When you do manifold spacers, cooler intake kit and some other under hood mods to help temps, maybe that throttle body bypass mod makes even more of a diff. See what I mean? It's the sum of the parts.

[jaybquick@JHM]

Thanks guys for the support. I hope this benefits some people on here.

For those who want to get some stuff at their local parts store and for those who need a little more clarity on how to install it, here are some pictures I put together to show the install.

The caps aren't necessary, but keeping dirt and debris out in case you hook it back up is probably a good thing.

i checked on my 2004 s4 avant and i didnt see those two hoses at all???

Post up a picture. I had one other 04 guy point that out to me. This is probably another weird thing like the fact some cars don't have the small flap and mini inlet duct in their airbox even though it doesn't show this in ETKA.

[SuperAvant]

Any ideas on stock and post mod intake temp readings?

[40valve]

i checked on my 2004 s4 avant and i didnt see those two hoses at all???

I should've checked mine before ordering too. I don't have it either.

[cabracco85]

Any ideas on stock and post mod intake temp readings?

I did a little bit on this subject. Here is some info i have found. Also this car does not have the spacers in there yet. They should also help keep more heat away.
The coolant resivior read in at 203
The coolant line that we bypass was reading at 203 also
The elbow where we bypass was reading 127

I dont have any before temps as i just put it on and didnt think of getting any. But my bet would eb that it would be around 203 or maybe a little less. I dont think it would be that much lower then the other parts that have coolant running threw them. This was also on a day that was around 34 degrees.

I did not have any issues with the TB sticking, but it was a liitle on tha warmer side. I will do some more test as it should be getting colder here in the next few days. So i will repost with more info.

[B18b1ex]

Maybe i should find a lighter valve stem cap and post about it..get my drift?

I think they already have this, my Champion wheels have very short and light valves and lightweight aluminum caps.


Look I agree with the others if it costs me a dollar more to support so be it, I may (probably will) waste more gas getting to the store.

[ahwest]

Jay, here is the pic without the hoses.

[jaybquick@JHM]

I did a little bit on this subject. Here is some info i have found. Also this car does not have the spacers in there yet. They should also help keep more heat away.
The coolant resivior read in at 203
The coolant line that we bypass was reading at 203 also
The elbow where we bypass was reading 127

I dont have any before temps as i just put it on and didnt think of getting any. But my bet would eb that it would be around 203 or maybe a little less. I dont think it would be that much lower then the other parts that have coolant running threw them. This was also on a day that was around 34 degrees.

I did not have any issues with the TB sticking, but it was a liitle on tha warmer side. I will do some more test as it should be getting colder here in the next few days. So i will repost with more info.

Thanks for the info. Any updates about what the coldest temp you have been ok in???

Jay, here is the pic without the hoses.

Thanks, I saved it. Can you email me your build date and VIN to [email protected]. I am trying to keep track of which ones don't have it to I may be able to find the VIN split when they added the hoses.

[cabracco85]

[QUOTE=jaybquick@JHM;3308231]Thanks for the info. Any updates about what the coldest temp you have been ok in???
QUOTE]


Ive been out in 5 degree weather with out windchill and the mod was fine. I didnt have any sticking issues or any glitches at all. Im not sure how cold it was with the windchill i know it was i the negatives though.

[40valve]

Ive been out in 5 degree weather with out windchill and the mod was fine. I didnt have any sticking issues or any glitches at all. Im not sure how cold it was with the windchill i know it was i the negatives though.

Do you park in the garage or the street?
I would imagine if you parked in the garage you should not have any problems at all because of the amount of heat that this engine generates. I think it's sufficient enough to warm up the TB.

[Justincredible]

I can almost guarantee that there is not going to be any issue with the throttle body sticking on being an issue. If the 2004 cars don't have it and there has never been one person say that they had a sticking throttle body I don't see there being an issue.

Think about this. The temp is say -10deg out side. The coolant when you start the car is not at operating temp. The coolant is say at 32deg protected from wind chill and it can't freeze so. Not only that but the coolant doesn't go threw the throttle body it goes threw an elbow between the throttle body and the intake. Once you start the car the coolant temp doesn't get up to operating temp for about 5 min of driving. At that time the car has been driven and the throttle body has been working for the 5 min. If the throttle body was going to be stuck the cold coolant at start up isn't going to do anything.

The research I have found points more towards emissions and heating the air before in goes into the motor. Not good for power but good for emissions

[cabracco85]

I can almost guarantee that there is not going to be any issue with the throttle body sticking on being an issue. If the 2004 cars don't have it and there has never been one person say that they had a sticking throttle body I don't see there being an issue.

Think about this. The temp is say -10deg out side. The coolant when you start the car is not at operating temp. The coolant is say at 32deg protected from wind chill and it can't freeze so. Not only that but the coolant doesn't go threw the throttle body it goes threw an elbow between the throttle body and the intake. Once you start the car the coolant temp doesn't get up to operating temp for about 5 min of driving. At that time the car has been driven and the throttle body has been working for the 5 min. If the throttle body was going to be stuck the cold coolant at start up isn't going to do anything.

The research I have found points more towards emissions and heating the air before in goes into the motor. Not good for power but good for emissions

This was what i was thinking too. I dont see how the tb would freeze up from it. But i wanted to check it out to make sure i had no issues with it. So far no issues, and i dont think i will have any issues either.

[cabracco85]

Do you park in the garage or the street?
I would imagine if you parked in the garage you should not have any problems at all because of the amount of heat that this engine generates. I think it's sufficient enough to warm up the TB.

I park it in the garage, but i did have the car turned off outside for a few hours and it was cold when i started it back up. No issues when i did that either.

[Captain Insano]

I can almost guarantee that there is not going to be any issue with the throttle body sticking on being an issue. If the 2004 cars don't have it and there has never been one person say that they had a sticking throttle body I don't see there being an issue.

Excellent point. If it was going to be an issue there are enough cars without it where we would have heard about it by now I would think.

[jaybquick@JHM]

Thanks for all the info and feedback guys. It was almost 70 degrees for us over the weekend, so I can't be of much help on seeing if it would stick.

[Bravest NY S4]

So basically this mod isn't really gonna give us ANY gains....correct??
hey Jay, did those spacers go out today???

[cabracco85]

So basically this mod isn't really gonna give us ANY gains....correct??
hey Jay, did those spacers go out today???

it will help keep it cooler, which in the hot summer months you should gain a little.

[jaybquick@JHM]

So basically this mod isn't really gonna give us ANY gains....correct??
hey Jay, did those spacers go out today???

Is your car faster in the summer or winter?? Winter due to colder air. So anything you can do to NOT heat the incoming air will always be helpful. You would never feel something like this with the "butt dyno" but most mods you can't. Plus sometimes the "butt dyno" lies and you think it is faster because it is peeky and doesn't pull the same through the whole band. But in actuallity it is overall slower.

Spacers should go out tomorrow overnight. Still waiting on 2 more gaskets. It sucks having a product that relies on other peoples gaskets. They never epected this kind of volume on an intake gasket for this new of a car I bet. I ran two major warehouses out nationwide.

[Captain Insano]

Still waiting on 2 more gaskets. It sucks having a product that relies on other peoples gaskets. They never epected this kind of volume on an intake gasket for this new of a car I bet. I ran two major warehouses out nationwide.

Haha... Nice.

[Bravest NY S4]

Is your car faster in the summer or winter?? Winter due to colder air. So anything you can do to NOT heat the incoming air will always be helpful. You would never feel something like this with the "butt dyno" but most mods you can't. Plus sometimes the "butt dyno" lies and you think it is faster because it is peeky and doesn't pull the same through the whole band. But in actuallity it is overall slower.

Spacers should go out tomorrow overnight. Still waiting on 2 more gaskets. It sucks having a product that relies on other peoples gaskets. They never epected this kind of volume on an intake gasket for this new of a car I bet. I ran two major warehouses out nationwide.

Cool, I'm gonna run the bypass kit either way....That's why I ordered it along with the spacers!
That's great, I'm sure you'll be running warehouses out for awhile my friend... Good for you and keep up the good R&D

[CasaS4]

My 2004 does not appear to have coolant hoses connected to the throttle body (unless they are on the underside for the 04's, which I doubt). I just ordered the intake spacers via Avalon, so I'll take a look when I do the install.

[Justincredible]

The 04's don't have the extra air box inlet or the coolant threw the elbow

[91gl]

The 04's don't have the extra air box inlet or the coolant threw the elbow

my car is an 04 and has the coolant through the elbow but no extra airbox inlet

its an april 2004 build date s4

[Bravest NY S4]

my car is an 04 and has the coolant through the elbow but no extra airbox inlet

its an april 2004 build date s4

Same here...whats up with that??