4.2 FSI motor

[LoresonDE]

I have searched for days and have come up with nothing.

Has anyone gone into this motor? Pistons? Rods? Any idea on what the limits of the motor are?

I have seen all the posts about superchargers and 5-6psi. Has anyone pushed more boost?

It seems like most looking for big gains do a s/c and leave it at that. Is there anyone pushing further?

Has there been any talk with tuners about this...do they for see being able to tune FSI for 6..7..8..900 hp...?

[Smylife]

You should just go into the B6/7 S4/RS4 section and start reading. BIG controversy about superchargers. Seemingly, bolt-ons can give you the same, or better performance. JHM just entered the supercharger game as posted in one of their threads they have achieved a 1/4 ET of something like 12.24?

They've also tested the internals of the S4 so you should contact them for further information.
SEARCH (better)

[LoresonDE]

yes, but s4 and rs4 motors are quite different. I'm interested in the latter...RS4 motor.

And thanks for the reply.

Maybe I didnt ask the right question here.

What I am asking is who...if anyone... has taken the platform past putting a kit supercharger on the car. aka highly modifying an RS4.

Is the ECU support here to do it, has anyone gone into the motor itself and upgraded internals, any of the s/c guys pulley the blowers for more boost?

[CONTROL TWO]

no, you have to be the first.. sucks doesnt it?

[Smylife]

Oh right FSI.. My bad!

[Smylife]

Still, hit up JHM and see what they can tell you! They just got an RS4 not too long ago.

[2manytoys]

I'm not sure what you'd do to it? If you are talking about getting more out of it in NA form that would be a pretty big ask I'd say. I'd say a set of turbo's, if you could fit them, would be pretty cool.

The block is pretty solid, same with the heads. The pistons are already light weight I think. I'm not sure about the rods, but to have it spin past 8000 rpm I think they could take a bit of boost pretty easy. I like how the oil is sprayed up under the piston too.

Here are some pics of my engine pulled apart.

New Block


Old Engine Crank


Old Bore


Old Heads


More pictures are here if you are interested
http://s881.photobucket.com/albums/a...20and%20Stuff/

[Ill 3.0]

Pistons are forged, rods were designed to be stronger than what is in the BHF motor so should handle quite a bit. The issues with more boost than 6-7 psi will be the 12.5:1 compression ratio.

[LoresonDE]

no, you have to be the first.. sucks doesnt it?

Nope, be pretty cool to be the first!

Still, hit up JHM and see what they can tell you! They just got an RS4 not too long ago.

I may have to do that, problem is I am in the research phase and just gather info while I get married, get a house, then pick a RS4 up. I dont want to bother them until the time comes you know... it's good to know that I may be the first if no one else takes the step.

I'm not sure what you'd do to it? If you are talking about getting more out of it in NA form that would be a pretty big ask I'd say. I'd say a set of turbo's, if you could fit them, would be pretty cool.

The block is pretty solid, same with the heads. The pistons are already light weight I think. I'm not sure about the rods, but to have it spin past 8000 rpm I think they could take a bit of boost pretty easy. I like how the oil is sprayed up under the piston too.

Here are some pics of my engine pulled apart.

New Block


Old Engine Crank


Old Bore


Old Heads


More pictures are here if you are interested
http://s881.photobucket.com/albums/a...20and%20Stuff/

I'll have to look at your pictures when I get home, I cant see them(blocked). I really appreciate your reply though.

The plan I'm running through in my head is twins and enough boost to get 600awhp. I built a twin turbo 358 ford motor by myself, tuned it, built the kit and everything. Now this car is completely different and i've gotten past the fact of money and the costs associated. I want to build something unique and very very nice. My biggest concerns center the longblock and if the tuning experience is there to do it (fuel, ignition,...)

With that said, pistons are a must. I dont really plan to do anything other than make the internals bulletproof, especially how high these motors rev. I will most likely have to go into valvetrain a little too.

Pistons are forged, rods were designed to be stronger than what is in the BHF motor so should handle quite a bit. The issues with more boost than 6-7 psi will be the 12.5:1 compression ratio.

Yup, definetly pistons are a must.

[Ill 3.0]

Speaking with JHM is your best bet since they've said they are working on an FI application for the RS4. They did not specify, but could be a centripetal setup similar to what they are releasing for the B6 S4.

EvoMS started on a TT setup for an R8 and this may give you some help/ideas:
http://www.r8talk.com/forums/showthread.php?t=4345

I know there are differences btwn the R8 and RS4 motor but I would think at least the block, rods, pistons, crank etc. would be the same.

[LoresonDE]

Speaking with JHM is your best bet since they've said they are working on an FI application for the RS4. They did not specify, but could be a centripetal setup similar to what they are releasing for the B6 S4.

EvoMS started on a TT setup for an R8 and this may give you some help/ideas:
http://www.r8talk.com/forums/showthread.php?t=4345

I know there are differences btwn the R8 and RS4 motor but I would think at least the block, rods, pistons, crank etc. would be the same.

Am I corect in saying that the main differences are the r8 is dry sump and rs4 is wet?

[WinterRunner]

Am I corect in saying that the main differences are the r8 is dry sump and rs4 is wet?

And the fact that the R8 has dual intake tracts whereas the Rs4 only has one bigger one. Same block and heads though....

[Ill 3.0]

Am I corect in saying that the main differences are the r8 is dry sump and rs4 is wet?

I've never read about other differences other than intake as noted above. Maybe someone with ETKA could at least confirm several of the key part numbers are the same.

[WinterRunner]

It is a wet sump Ill3.0, he is correct in that.

[LoresonDE]

So you guys would recommend talking to JHM, do any of the other shops warrant any consideration? I noticed APR has a S/C but I read that that is all the are doing for the platform.

Heck, maybe by that time they'll have a 600whp rs4!

[WinterRunner]

JHM, give em a call. Very helpful, knowledgable guys.

[zachf88]

I know of a an S4 that was running PES with about 13-14psi of boost and blew the engine (the piston split in half)

[gatame]

If there's one thing I've learned from my past...If it didn't come with forced induction, leave it that way...I blew 3 N/A motors with turbos and S/C that were supposed to be able to handle low boost...JMO...

[Ill 3.0]

It is a wet sump Ill3.0, he is correct in that.

Yeah, I meant it to be inferred he was correct but not saying it was wrong. Guess that wasn't clear.

[beemercer]

So you guys would recommend talking to JHM, do any of the other shops warrant any consideration? I noticed APR has a S/C but I read that that is all the are doing for the platform.

Heck, maybe by that time they'll have a 600whp rs4!

The APR kit will be nice for sure, but APR targets the OEM+ market.. not the 600whp market. The TVS1320 used in the APR kit has no chance of reaching your power goals.. so you'd be looking at getting a TVS1900 or 2300, which would take a bit of convincing to fit. You'd be better off looking elsewhere.

I know of a an S4 that was running PED with about 13-14psi of boost and blew the engine (the piston split in half)

Did you mean PES?

[LoresonDE]

The APR kit will be nice for sure, but APR targets the OEM+ market.. not the 600whp market. The TVS1320 used in the APR kit has no chance of reaching your power goals.. so you'd be looking at getting a TVS1900 or 2300, which would take a bit of convincing to fit. You'd be better off looking elsewhere.



Did you mean PES?

When you say OEM+ do you mean a stock car + an s/c kit? versus a stock car + a built motor, tubros, tuning, blah blah blah...?

Yea, the whole supercharger thing just doesnt really appeal to me. However, it is good to see they being put on the platform to push the limits of motors and tuning. I'm looking to do TT with a nice a/a cooler.

I really appreciate all of your applies. I know I just registered, but this is something I really enjoy talking about and doing.

[LoresonDE]

I know of a an S4 that was running PED with about 13-14psi of boost and blew the engine (the piston split in half)

Was this posted public? Interesting to see what happened, and the setup he was running...

[LoresonDE]

If there's one thing I've learned from my past...If it didn't come with forced induction, leave it that way...I blew 3 N/A motors with turbos and S/C that were supposed to be able to handle low boost...JMO...

But then you wouldnt have the guys doing the TT gallardos, R8's, and so on... Someone is bound to push the limits of a platform to the breaking point for the next guy to blow those limits out of the water. Thats what this obsession is all about.

[zachf88]

Did you mean PES?

Yes, sorry! The guy doesn't post on the boards but yeah, he had to get a whole new engine! All that I know was that he had a PES supercharger and he was running 13-14psi and one of his pistons cracked right down the middle into two pieces and there was a bunch of metal chunks and mangled parts in the oil pan.

[gatame]

But then you wouldnt have the guys doing the TT gallardos, R8's, and so on... Someone is bound to push the limits of a platform to the breaking point for the next guy to blow those limits out of the water. Thats what this obsession is all about.

True true...just playing it safe...replacing motors sucks...

[beemercer]

When you say OEM+ do you mean a stock car + an s/c kit? versus a stock car + a built motor, tubros, tuning, blah blah blah...?

I mean OEM+ as in it's like a slight bump in the stock power, nothing too crazy or extreme. It's enough that it makes the car feel a lot stronger without having to worry about popping the motor. It's conservative enough that they could warranty it.

Yes, sorry! The guy doesn't post on the boards but yeah, he had to get a whole new engine! All that I know was that he had a PES supercharger and he was running 13-14psi and one of his pistons cracked right down the middle into two pieces and there was a bunch of metal chunks and mangled parts in the oil pan.

That's too bad for him, definitely props for having the balls to push the thing.