Hello everyone I just was wondering if you guys could anwser my question....I had my b16a dyno'd/tuned thursday...I have a decent setup, including....sorry for the long list

stock sleeves
Weisco pistons 9:1
Eagle rods
Oem hg
arps

Manley 1mm oversized valves
sk2 retainers/springs
gsr cams
sk2 intake
Fully p/p head

turbonetics 60-1 63ar exhaust 82ar intake
neukin ramhorn
2.5 in piping
ebay intercooler

rc 750cc
aem fuel rail
aeromotive fpr
walbro 255
s300


car made
371whp 270 tq 17psi

I was happy with the results for a b16..my only question is the tuner said it would of kept making power but somthing was holding it back..it fell of @ 8100 when we turned the boost up to go for 400whp..He said It may be the turbo which I dont think is possible because its rated for 500+whp..I brought up that i only had an ebay intercooler, im just wondering if the may not be able to keep up with the turbo and is choking the car?? what do you guys think

 

There was a thread about this but the guy only had 250whp...77 views can any one put in some input?

 

what size is your IC LxHxW? What were your IAT's above 7500rpm?

 

Do you have a dyno graph? IAT chart?

Also, what size is your exhaust piping?

 

IAT's are normal, the car was running very cool...Intercooler is 28x9x3. Exhaust is 3in dp and i have an electric cutout, that was open during tuning...Could it be my intercooler piping? Its 2.5in ran threw the frame and the normal cold side runing up to the TB.

 

1) Verify the size of the turbo by measuring the wheels. (also your housing sizes are wrong. verify that as well)

2) Verify there are no exhaust leaks or boost leaks.

3) Check compression and do a leak down test.

4) Who did the tuning? Do they know what they are doing?

If all 4 of those come up with answers seeming that everything is okay, the intercooler is a likely place for a problem. There are a ton of different ebay intercoolers available. A lot of variance in quality. Hard to say if it is a restriction or not but it is a strong candidate.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegman23 &raquo;</TD></TR><TR><TD CLASS="quote">IAT's are normal</TD></TR></TABLE>

nobody asked if they were normal, what are the numbers? some people think 150 degrees is normal, hell jrsc guys think anything under 200 is fine...

also worth looking at is your dumptube, is it far away enough from the inlet of the turbo..

 

i have about the same problem, i made 354 whp at 20psi with a garrett 57trim, i have a backdoor intercooler from ebay,tube and fin.
can you messure the flow to see if it is the intercooler that holds the power back, like you flow ha cylinder head.

edit, my iat are never over 115f

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by anton_ &raquo;</TD></TR><TR><TD CLASS="quote">i have about the same problem, i made 354 whp at 20psi with a garrett 57trim, i have a backdoor intercooler from ebay,tube and fin.
can you messure the flow to see if it is the intercooler that holds the power back, like you flow ha cylinder head.

edit, my iat are never over 115f</TD></TR></TABLE>

115 is not bad and 354 at 20psi from a 57 trim is not bad either, i'm guessing it was a smaller 57 trim maybe a t3/t04b? i made 317whp at 14psi from a t3/t04e 57trim so your numbers at 20psi are about on par with mine, considering the turbo is usually done at 400-450.

 

My Iat's were at 134...The turbo i bought from a friend thats what i was told it was...I is a turbonetics 60-1...and i know that the intake side is 4in. I just measured that.

 

mine are around 115 also, from what I've heard that's within the ballpark?

 

i made 285 on a d16 t3/t04e 50 trim 15 psi and my numbers fell right there.

thinking my issue has to do more with my ignition system more so than my intercooler now.

got a dyno sheet so i can compare?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegman23 &raquo;</TD></TR><TR><TD CLASS="quote">My Iat's were at 134...The turbo i bought from a friend thats what i was told it was...I is a turbonetics 60-1...and i know that the intake side is 4in. I just measured that.</TD></TR></TABLE>

thats a bit high, i was at 140+ with my old intercooler at 18psi from the t3/t04e, with the new core i never go over 110 and my is just as fast at 14psi now with 110iat as it was with 18psi and 140iat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by didder &raquo;</TD></TR><TR><TD CLASS="quote">i made 285 on a d16 t3/t04e 50 trim 15 psi and my numbers fell right there.

thinking my issue has to do more with my ignition system more so than my intercooler now.

got a dyno sheet so i can compare?</TD></TR></TABLE>

i'm currently right around that area also but that's because i went with cheap parts, the IC is fine though. not sure what the IAT is, but my cutoff is from my WG and boost controller, I was running a 9psi spring with a cheap BC. Spiking 19psi and dropping to 16psi. Got a 1.1bar WG spring coming and bought a new Turbosmart BC so hopefully it's all good. My tuner told me he seen 22psi on his laptop and it handled it fine just wouldn't hold it

 

I would pressure test your intercooler and charge pipes + maybe test the pressure drop through the intercooler if you have the means to do so.

 

If IAT's were up (134 is kinda up), that says the there is a leak & the turbo is overspinning to make a certain psi or the FMIC sucks. One issue is the stock IAT sensor isn't all that wonderful. It was meant for an NA econobox, not boost.

Honestly if power falls at 8100, its probably the cams. GSR cams aren't that crazy compaired to B16 cams. The diff between those two and ITR cams is far much bigger. Not too many built heads can make a straight torque line to/past 9k, so you might want to look into that.

 

EDIT: My IAT's are at 124 i hit the wrong button....anyways my head porter told me the same thing he said get a good set of cams and it will pull all the way up top..

 

what size downpipe? and was it open?

 

3in dp with open exhaust cutout

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">If IAT's were up (134 is kinda up), that says the there is a leak & the turbo is overspinning to make a certain psi or the FMIC sucks. One issue is the stock IAT sensor isn't all that wonderful. It was meant for an NA econobox, not boost.

Honestly if power falls at 8100, its probably the cams. GSR cams aren't that crazy compaired to B16 cams. The diff between those two and ITR cams is far much bigger. Not too many built heads can make a straight torque line to/past 9k, so you might want to look into that.</TD></TR></TABLE>

I don't run the IAT sensor on my setup, no CEL's and my tuner never said anything about my IAT being a problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nichelson_Performance &raquo;</TD></TR><TR><TD CLASS="quote">

I don't run the IAT sensor on my setup, no CEL's and my tuner never said anything about my IAT being a problem.</TD></TR></TABLE>

that does not change the fact that OEM IAT sensor is junk and you can lower your iat further with a more efficient core to gain more power.

 

Heres my dyno sheet..i know you cant even see it..i had to take a picture of it...but you can see it drops off at 8200

 

stop effing around and get some cams

 

lol...alright you convinced me

 

this is what i have been told
60-1's generally do not like higher boost levels

they flow alot but are designed to do so at lower boost levels on bigger engines
they are somewhat the turbo of choice for VW VR6 engines that vary from 2.8-3.2L

what cams are you thinking of getting

how much power are you looking to make?
i would really think about a different turbo