Where's my power???

[stevebsvs]

So I've been on a long journey to 400rwhp, and I know I have more work to do, but the power I'm apparently putting down is no where near where it should be. Here's my setup:



S14 SR20DET

built bottom end

ported & polished head

BC Springs & Titanium Retainers

BC 272 cams, VTC Enabled and engaged from 1100rpms to redline (8K)

GT2871R .86 on stock manifold

Greddy knock off Intake Manifold

660cc deatschwerk injectors

Godspeed 12x31x3 IC

Haltech E6K Standalone

3in turboback exhaust

Greddy Profec B EBC



This dyno was done at around 17psi, and according to the haltech, the injectors are at 100% duty cycle around 18psi. Now one issue with the EBC is that after 1bar of boost, the boost needle shakes or fluctuates rapidly as the solenoid tries to manage the boost. I dont know if this is normal, or that I am in need of an HKS Internal Wastegate. However, my old manual boost controller would hold better and stable.



Now I know the stock manifold is somewhat of a bottleneck but so is my stock S14 SR Throttle Body, which I know is smaller than I need...but what else could be robbing my power? My timing is correctly calibrated with the haltech and my timing is not so conservative.



Here's the latest dyno sheet:
http://www.stevenjbrolin.com/_upload/275RWHP.GIF

[johngriff]

Cams too big.

VTC needs better tuning.

What is the ignition timing at 14psi from 3000-7000 rpm?

[stevebsvs]

Here's my map. I recently changed my ignition timing to the second section of data on the Excel file.

http://www.stevenjbrolin.com/_upload/haltech_ignition_map_v2.xls (http://http://www.stevenjbrolin.com/_upload/haltech_ignition_map_v2.xls)

[50/50]

too much cam overlap??? incorrectly set cams, bad turbo, and maybe a host of other little issues robbing power including tuning.

any more info on your setup?

[S14DB]

VTC should be on from 0 till your Tq peak. So, around 4800-5000rpm.

VTC is not vtack. It retards your intake cam to increase Tq output at low to mid rpm. Then disengages at the Tq peak to open up for max HP.

It should be on before the Tq peak to reduce the time under curve. You will need to play with the disengagement at the Tq peak to make it disengage smoothly. To early or to late can create some lag or hesitation.

[TurboNetic05]

mustang dyno? those read really low i believe

[just1pepsi]

I'm liking the suggestions about the cams, valve overlap and VTC settings. I also wonder about the injectors.. are those big enough.. I dont claim to know alot about boosted setups though.

[SoSideways]

Yeah that's way low...

I have the stock T25 cranked to 14psi, with something wrong with either the engine or the turbo itself, and I made 216 ft-lbs of TQ.

http://i42.photobucket.com/albums/e346/SoSideways/4-28-07_dyno_day_smaller.jpg

[lazierhobo]

something is seriously wrong if you are maxing out those 660cc injectors and only making that much power. you should be able to make close to that amount of power on the stock injectors. what kind of A/F are you seeing?

[stevebsvs]

Im seeing high 11's under boost. The A/F is solid so Im not too worried about that. Could the cams be hurting me more than I think? Should i simply disengage the VTC all together and see if that helps a bit with the torque?

[sean350z]

Triple check your engine timing and ecu timing. You aren't hitting 17psi until 5,000rpm. Either that's what's off or you have a massive leak somewhere.

Also do a compression check just for kicks.

[stevebsvs]

time to invest in a timing light and a compression test kit :/

[seven.62]

you should safely be able to put out at least 450whp with 660's so is something up incorrectly with your injector settings? voltage settings? i know detschwrks injectors can be hard to calibrate correctly, but you should be no where around 100% dutycycle, can you post up a copy of your timing map?

[seven.62]

oh and i can come over with my compression tester instead of having to buy one.

[stevebsvs]

oh and i can come over with my compression tester instead of having to buy one.

what are you doing this weekend? We're having a party at my apartment on Sunday if you're bout it. Call Ashlee and see what plans she has...it's all secretive... (504) 875-6909 :o

[Black240sxSD]

mustang dyno? those read really low i believe
The dyno sheet says dyno dynamics not mustang dyno

[Black240sxSD]

you should safely be able to put out at least 450whp with 660's so is something up incorrectly with your injector settings? voltage settings? i know detschwrks injectors can be hard to calibrate correctly, but you should be no where around 100% dutycycle, can you post up a copy of your timing map?


The injectors may be 450whp capable but making that with a gt2871 will be tough.

[TurboNetic05]

The dyno sheet says dyno dynamics not mustang dyno

my bad......

[johngriff]

Yes, ditch the cams for your stockers for now.

2871r coming on at 5000k?

Something is wrong wrong.

[S14DB]

Yes, ditch the cams for your stockers for now.

2871r coming on at 5000k?

Something is wrong wrong.

I still think that he's got the VTC backwards.

[Tulok]

something is definitely up, my buddy had an sr with a CAI, FMIC, cat back and a t28 pushing 17 lbs and he smoked Z's. Evos, imprezas, camaros, double check EVERYTHING and make sure that all of you plug wires are on :P
Also, 660cc injerctors shouldnt be maxed out for anything under 400whp either.

[kassed33]

check your wastgate adjustment, it could be leaking boost and the boost controller is fighting to keep up the boost, make sure it is tightned all the way or its gonna try to release before you want it to, that was the problem with mine and i'm pushing 357whp on a 2871r .64, stock internals, stock head,
550cc injectors. you should def be over 400whp