Getting really low numbers on tuned greddy kit
Joined: Mar 2008
Posts: 349
Likes: 6
From: Bay Area, CA
I never got it resolved. Tuner didn't really have any good suggestions. I ended up getting a good deal on a lower mileage motor, and ditched the turbo kit. I did a compression/leak down test on my old motor before i did, and the motor was perfectly fine.
Thread Starter
Joined: May 2014
Posts: 225
Likes: 9
I will keep you updated, I have a feeling the turbo might be worn/not functioning well so i'm going to have it pulled and examined. My motor, like yours, is also in great shape so if the turbo comes back fine and the motor is good too than I can confidently say it was the manifold.
Joined: Mar 2008
Posts: 349
Likes: 6
From: Bay Area, CA
I will keep you updated, I have a feeling the turbo might be worn/not functioning well so i'm going to have it pulled and examined. My motor, like yours, is also in great shape so if the turbo comes back fine and the motor is good too than I can confidently say it was the manifold.
Registered User
Joined: Mar 2015
Posts: 371
Likes: 9
254whp is low for 10psi, 280whp is not, agreed. However with a pfab log and 3" downpipe and exhaust, id expect it to be in the top end range of expectations for the psi closer to the 300whp mark. Its a tiny turbo though regardless and the F motor breaths so much cfm in the upper range, that size turbo is nearly a choke point for this engine there. You get more peak yield out of an old Novi 1000 super charger at 6psi then a greddy turbo. I've seen consistent reports of 260whp stock out of the box with 6psi and 280-300whp at 10-12psi though on a dynojet roller dyno with greddy.
That was awesome +1 on reverse vtec yo!
Community Organizer
Joined: Jun 2007
Posts: 31,070
Likes: 566
A buddy of mine had this kit and eventually had to go with the pfap log due to the cracks issue, and he went to a gt30/76r with it at that point and at the same pressure and water meth made 425-450whp if I recall correctly. So the Pfab as lame as it is, is capable of decent yield for the pressure with the right size turbo it appears.
Joined: Sep 2008
Posts: 750
Likes: 5
From: Miami
I made 360whp with the stock greddy kit and stock exhaust with 70mm test pipe. That was the most power i made with the greddy kit which was tuned on e85 fuel and 14psi. My full description and dyno sheet is in the greddy turbo kit thread. Feel free to check it out. After upgrading to a pfab sidewinder manifold setup and now back to stock. I dont regret the greddy kit, love the simplicity of the kit. Its just limited in power, though perfect for those who dont need insane power.
Community Organizer
Joined: Jun 2007
Posts: 31,070
Likes: 566
Thread Starter
Joined: May 2014
Posts: 225
Likes: 9
I made 360whp with the stock greddy kit and stock exhaust with 70mm test pipe. That was the most power i made with the greddy kit which was tuned on e85 fuel and 14psi. My full description and dyno sheet is in the greddy turbo kit thread. Feel free to check it out. After upgrading to a pfab sidewinder manifold setup and now back to stock. I dont regret the greddy kit, love the simplicity of the kit. Its just limited in power, though perfect for those who dont need insane power.
Thread Starter
Joined: May 2014
Posts: 225
Likes: 9