CWK

iTrader: (1)

I added a 90mm fast intake and throttle body to my a4 h/c 347.Before with the ls6 intake the car made 444rwhp 387rwtq. After the intake and throttle body the car made 436rwhp and 379rwtq. Very dissapointed in the results.

JoeDirt

ouch

dand35th

probably because it seems WAY to high for an auto H/C car to have that much HP to begin with..

Ravenous T\A

iTrader: (12)

Did u Mod the TB?, I read that some of the TB blades didnt open all the way and require some modifactions to make it work right.

Damage Inc.

iTrader: (7)

Right, I heard that too. Are you sure about the whole 444rwhp? I don't think that many people have done that in an M6. let alone an A4. Congrats if so.

beardWS6

iTrader: (1)

so true. I`m safely tuned for spray and pulled 414rwhp and about 387rwtq with my A4, 12-bolt, stall. Remember a LSx intake and 90mm are made for bigger bore motors, Stoker type. They might be hurting your 347. By the way, if he has a 10-bolt to get 444rwhp. He could get another 10-15rwhp than me. I`ve pulled timing and running rich for my numbers. See Sig!!

Chris@AP-Engineering

iTrader: (-2)

Clay, what else did you change? Anything?? Did you use the same dyno that you got your previous numbers from?

CWK

iTrader: (1)

dand35th and dear john I'm sure about the number my car made and yes they are sae corrected.

Chris- The only change was the intake and throttle body.Do you have any ideas? Yes I used the same dyno.

dand35th

whats the car run??

CWK

iTrader: (1)

The car has run a best of 10.99@123 ,runs 11.0's consistantly with a 60ft in the mid 1.5 range, with a race weight of 3450

offaxis

iTrader: (19)

I remember like a year ago when he was making 436rwhp. Im sure he has made some other changes since then. There are a few a4 cars with good combos making some really nice numbers.

CWK

iTrader: (1)

offaxis- the car actaully made 447 rwhp 403rwtq with the old set up a year ago, I switched from a g5x2 to a t-rex cam also made a gear change from 3.23 to 3.73 that may have hurt the number from the previous setup?

offaxis

iTrader: (19)

I think at most you would loose from that gear change would be 5hp. Im not sure if there are any people making great numbers with the t-rex and ported heads,. I know it was designed to make lots of power with stock heads but not sure how people are making out with ported heads except a few freinds that were very disapointed with it. But maby i am just missing all the numbers.

redc4

iTrader: (2)

I have been helping Clay with the car. Not sure why the 90mm setup did not add power. Strange thing is that flow through the intake is up 10cfm over the LS-6 intake. Also, when tuning the car, it made the exact same HP/TQ at 14.0, 13.3, and 13.1 Air fuel ratio.

I am starting to wonder if it may be exhaust related.

Clay, remember the G5X-2 dyno was with 3.23 gears and on a different dyno. The current numbers are through a 3.73 ten bolt with the T-Rex. I think the T-Rex definately gives up some torque to the G5X-2 on this setup.

offaxis

iTrader: (19)

For what its worth my friend just made the same switch g5x2 to a trex and he actually lost some hp. HE had the same exact thing happen they went from 14.0 to 12.5 and his hp only changed 1 hp.His car was maxed at 451 hp . BTW he is switching to a g5x3 this week. I have heard a couple people say that when you use the trex with high flowing heads it bleeds off too much compression. but thats just what i have heard I have no hard proof except my friends car who also lost power and now i see the same thing with clays car. I guess we will see next week when the x3 is in and its retuned.

smokin' joe 00 ss

Matching heads to cam is sooooooo important!!!

granitemonkey

Indeed

CHRISPY

did you tune after the swap?

Tony Mamo @ AFR

iTrader: (13)

Somethings wrong...

And it's not the intake.

I have personally been involved in at least a half dozen swaps, both chassis and engine dyno, and everyone yeilded approximately the same results. Intake alone (78 version) worth 9-12 HP....add 5 or so for the 90 TB. On a larger engine slightly more gains can be seen, but those are the minumum I would expect to see.

Assuming same dyno, correct barometer, nothing else changed etc., I would go back over the install....Did you replace the under the manifold bolts that Comp provides you with so the manifold will sit low enough to seal up on the intake runners?? Is the MAP sensor hooked up?....Something went wrong in the install if you want to make an assumption that all the testing back to back is accurate. Go back and re-trace your steps....Something was overlooked or missed.

There is no way your FAST intake is going to have the opposite results of everyone else in the country....some saw more power than others of course, but NOBODY went backwards....It has zero to do with cam, cubic inch, or anything else....Don't get frustrated....just take your time and go back over the entire install if necessary.

Good luck...

Pro Mouse

iTrader: (15)

I totally agree,My H/C combo is a proven one at that,I picked up 20 rwhp and 15 rwtq with my 90mm intake and TB same dyno and same motor set up a week later ,so I know it Rocked my combo