ZZP LNF Turbo Upgrade- First Dyno Session
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Former Vendor
Joined: 06-03-08
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From: Grand Rapids, MI
ZZP LNF Turbo Upgrade- First Dyno Session
As many of you know, we have been using my '08 Cobalt SS/T to test a variety of new ZZP mods. We were able to push the stock turbo to 340whp(sae) and an 11.99 ET. We recently started releasing many of the parts I ran on this car. The next step was to work on a turbo swap in search of big power...
Ryan has been working hard on a bunch of new parts for the new ZZP LNF turbo upgrade. We just fired up my car with the first kit installed.
Here is the mod list:
ZZP LNF turbo kit with Borg Warner S256 extended tip turbo from Bullseye Power
External wastegate dump tube
ZZP upper charge tube
ZZP race intercooler
ZZP ported head with 78 lb valvesprings
ZZP fuel pressure modifier @ 2750psi
ZZP 3" stainless catback
ZZP stage 4 clutch
We fired up the car this afternoon and strapped it down on the dyno. I set up a file for the base tune and we made the first pull at 18psi. It was a short pull, shutting down at 6400 RPM and we were quite pleased with the results. Actual power was over 410whp, and the sae corrected power was 392(yeah, it's cold here) and climbing rapidly. A couple pulls later we were over 410 corrected at 18psi. Unfortunately, when we turned it up, we started running into a bunch of ECM issues and had to work around them. It seems that the ECM likes to close the throttle and spoil all the fun.
We ran into this before and fixed it by limiting the pressure the MAP sensors could see. This time around, it seems that once we are flowing enough air, it doesn't matter what the boost level is- the ECM still get's angry and closes the throttle. After working on the solutions for a couple hours, I was finally able to make full pulls at over 20psi, putting down over 440whp. For the last pull, I added 2 gallons of 110 octane with approximately 4 gallons of 93 left in the tank, set the boost to 22psi and revved out to 7800 RPM. The pull was clean until 7500 RPM, when the throttle started to close and power fell off. Max power for this pull was 465 sae(491 uncorrected)whp! The dyno chart is not pretty, but the power this car is putting down through the full exhaust and after only a few dyno pulls is very promising.
Here is the dyno chart-
Boost is scaled at 1psi/10whp on the dyno chart. In other words, the 200whp line is the 20psi line.
I am going to try to get back over to the shop tomorrow and see if we can get this machine past 500whp. I'll let everyone know how it goes.
Ryan has been working hard on a bunch of new parts for the new ZZP LNF turbo upgrade. We just fired up my car with the first kit installed.
Here is the mod list:
ZZP LNF turbo kit with Borg Warner S256 extended tip turbo from Bullseye Power
External wastegate dump tube
ZZP upper charge tube
ZZP race intercooler
ZZP ported head with 78 lb valvesprings
ZZP fuel pressure modifier @ 2750psi
ZZP 3" stainless catback
ZZP stage 4 clutch
We fired up the car this afternoon and strapped it down on the dyno. I set up a file for the base tune and we made the first pull at 18psi. It was a short pull, shutting down at 6400 RPM and we were quite pleased with the results. Actual power was over 410whp, and the sae corrected power was 392(yeah, it's cold here) and climbing rapidly. A couple pulls later we were over 410 corrected at 18psi. Unfortunately, when we turned it up, we started running into a bunch of ECM issues and had to work around them. It seems that the ECM likes to close the throttle and spoil all the fun.
We ran into this before and fixed it by limiting the pressure the MAP sensors could see. This time around, it seems that once we are flowing enough air, it doesn't matter what the boost level is- the ECM still get's angry and closes the throttle. After working on the solutions for a couple hours, I was finally able to make full pulls at over 20psi, putting down over 440whp. For the last pull, I added 2 gallons of 110 octane with approximately 4 gallons of 93 left in the tank, set the boost to 22psi and revved out to 7800 RPM. The pull was clean until 7500 RPM, when the throttle started to close and power fell off. Max power for this pull was 465 sae(491 uncorrected)whp! The dyno chart is not pretty, but the power this car is putting down through the full exhaust and after only a few dyno pulls is very promising.Here is the dyno chart-
Boost is scaled at 1psi/10whp on the dyno chart. In other words, the 200whp line is the 20psi line.
I am going to try to get back over to the shop tomorrow and see if we can get this machine past 500whp. I'll let everyone know how it goes.
I'm ready to trade my car in for one (SS/TC). VERY VERY IMPRESSIVE
Big.^
Looks like it doesn't have over 300whp until around 4500 and that's being generous. He did say the graph isn't pretty though so at least they know.
Looks like it doesn't have over 300whp until around 4500 and that's being generous. He did say the graph isn't pretty though so at least they know.
Last edited by damien; Oct 18, 2009 at 12:47 AM. Reason: Automerged Doublepost
Thread Starter
Former Vendor
Joined: 06-03-08
Posts: 4,169
Likes: 8
From: Grand Rapids, MI
56mm compressor wheel.
Last edited by Matt M; Oct 18, 2009 at 01:01 AM. Reason: Automerged Doublepost
Thread Starter
Former Vendor
Joined: 06-03-08
Posts: 4,169
Likes: 8
From: Grand Rapids, MI
I have boost coming in progressively and didn't start the pull till almost 60mph in 3rd. This setup will have no problem putting down 400+ ft lbs.
Thread Starter
Former Vendor
Joined: 06-03-08
Posts: 4,169
Likes: 8
From: Grand Rapids, MI
Low boost(20psi at the peak torque) and I did not go WOT until around 4000 RPM.
No pricing yet.
No pricing yet.
Last edited by Matt M; Oct 18, 2009 at 01:07 AM. Reason: Automerged Doublepost