SO, finished my build, broke in the motor, brought it for a tune, and can only get 350 hp out of it... wtf is going on? below is the setup..

-stock sleeves
-Hasport Mounts
-CP Pistons 81.5
-9.5:1 cr
-Manley rods
-ACL bearings
-ARP main and head studs
-Supertech valves, springs, retainers, guides, seals
-Supertech block gaurd
-Clutchmasters 6 puck stage 4
-Aeromotive 340 fuel pump
-AEM fuel rail
-AEM fuel pressure regulator
-ID725 injectors
-Skunk 2 pro intake mani
-Skunk 2 70mm alpha throttle body
-Precision6262 Turbo
-Mishimoto G Line 24.5" x 11.75" x 3" intercooler
-HKS BOV
-OEM gaskets, oil pump, water pump
-Moroso 5.5 qt oil pan
-stock crank, cams
-accel coil
-premium pump gas (no e85 here)
-AEM series 2

Seen similar setups, and even lesser setups put out way more...
any thoughts?

 

GSR? LS? Boost?

Who tuned it?

 

Gsr, 22 psi, realstreet orlando,fl.

 

How does it drive though?

 

Dyno could read rather low. or a MAJOR leak somewhere. That is rather uncommon, but as LighteningTeg stated, how does it drive to you?

 

Did you do a compression or leak down test yet? That's where i would start.

 

What WG are you running? Not in Spec?

Also, what duty cycle were the injectors at?

 

The first thing I would do is contact Realstreet and discuss this with them. They should be able to tell you exactly why your setup is making the power it did or what issues you may have, instead of asking people to guess.

 

Did a leak test at the dyno, tuner wasnt quite sure why the numbers were so.low either, thats why i figured id throw it up here and get some suggestions. Not sure on the duty cycle. As for.how the car drives, ive never owned anything that had more that a couple hundred hp, so its still fast to.me but just not the numbers i was expecting...

 

What made the tuner stop making power at 350? What was the limiting factor that made him say that's all its gonna do? What kind of dyno? If it was a mainline dyno then that's your issue. They are heartbreakers if you want numbers to brag about but great for tuning.

 

No dyno? No datalog?

 

Well if you go by this explanation, https://www.hondata.com/techduty.html and the fact that you are running 725cc injectors and your tuner is running them in the neighborhood of 80% duty than 350whp doesn't sound to far off.

 

Whats your map timing at?

Is your mechanical timing spot on?

 

 

From that vague explication you'll get a variety of answers. Could be the tune, could have leak down, could have a major boost leak of exhaust leak. Could have a restriction. Start with leak down test on a hot engine. Then start looking for boost leaks if engine is healthy

 

Thanks, def a few things to look into.... ill try to post back if i find something... thanks again for all the input...

 

22 psi from a 6262 with 725 cc injectors??? Something doesn't add up. Either it wasn't 22lbs or they aren't 725 cc. That's a big *** turbo pushing a lot of boost. Shooting for anything more than 350 with 725s would be stupid IMO.

 

I could see pump gas being an issue as far as to why not push it farther. I would discuss with RealStreet though.

 

We've done 350whp on 650cc older style Rochester Lucas injectors 10 years ago with plenty of duty cycle to spare.

How soon we forget over the years

 

what exhaust manifold? dp size? exhaust size? any cat converter?

 

major red flags.... you should be making over 500whp with 22 psi from a 6262..... first thing Id guess, is overboosting.. because we all know 22 psi on a 6262 with 750ccs... no bueno....

theres no way your motor is truly taking in 22lbs. you must have a major boost leak. I also advise to get retuned once you find the leak.

 

also, your intercooler is a bit small.

 

24 X 12 X 3 intercooler is NOT a small intercooler

 

boost leak and timing being off...

i remember when i made 240whp on turbo gsr @ 10psi...... wideband reading was of and timing was off... fixed it and did 300whp the very next pull. lol

 

Not at all. Just to put it in perspective, if you're like me and couldn't visualize it...



That's 24x12x3.5, according to the owner who posted it here.