Trick flow install underway
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
Have you checked the vaccum lines on the intake to see that they are drilled out/open. When I put my FAST 92 I kept getting CEL's saying there was a leak. Don't remember which codes. Big head ache. Went over it several times. Turned out FAST never opened the nipple. It was on the purge line nipple.
up to about 2500 RPM and watched the STFT's go up to like 30 then recover to 2 or 3 at idle. I read that is a vac leak otherwise would be A injector leak. Another interesting thing is I idle at 800 RPM and with A VAC GAUGE on there It was steady at 11" of HG. It this right. I know I have a CAM but is that not low. The MAP pressure in KPA I did not know or think of what that is in IN of HG. I just used a good HVAC Vac Gauge.
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
If the ecm is adding 24% fule at 50mph and while accelerating, you do not have a vacuum leak. If there was a leak bad enough to cause a +24%ltft at 50 mph the engine would not idle at all. Spray some 2+2 into the intake behind the tb and watch for the stft to go negative verifying the o2's are working. Then check your fuel pressure and then sub in a known good maf.I will do some more comprehensive vac checking in the AM. I will even Vac check the manifold on the bench if I have to. As frustrating as it is I am learning a ton of info. " This is really my College" LOL I'm going to bed.
Instructor
Joined: Apr 2009
Posts: 237
Likes: 2
From: Wilmington DE
The 24.2 is the value of the LTFT. Whatever that means it should be less than 10 or -10. I was not suggesting the ECM is adding 24% more fuel and
I will do some more comprehensive vac checking in the AM. I will even Vac check the manifold on the bench if I have to. As frustrating as it is I am learning a ton of info. " This is really my College" LOL I'm going to bed.
I will do some more comprehensive vac checking in the AM. I will even Vac check the manifold on the bench if I have to. As frustrating as it is I am learning a ton of info. " This is really my College" LOL I'm going to bed.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
24.2%LTFT means just that, the ecm is adding 24.2% over what it normally would at that rpm, load, ect, iat, and tp angle. Try accelerating from 1700 rpm in a higher gear at 1/3 to 1/2 throttle. See where the fuel trims are under that condition. Where are the trims at idle? stft and ltft banks 1 &2?
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
24.2%LTFT means just that, the ecm is adding 24.2% over what it normally would at that rpm, load, ect, iat, and tp angle. Try accelerating from 1700 rpm in a higher gear at 1/3 to 1/2 throttle. See where the fuel trims are under that condition. Where are the trims at idle? stft and ltft banks 1 &2?
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
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From: READING PA
St. Jude Donor '08-'09-'10
Manifold is warped pics will tell.
a guy who intentionally left the brake hose line off so people would think he had a Cam in it at a Car Show,
Yes there is LEAK and I found it. The top shell of the manifold is warped
and a crack showed up around the bolt hole. This manifold is a piece of crap and the pics are comming. I will make a call to hinson as I see many things wrong with this manifold. Im not saying the 102 is a bad manifold
but you will see the pics and you will know what I have been through.
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
Joe the manifold is off. Please give me some credit. However I do know
a guy who intentionally left the brake hose line off so people would think he had a Cam in it at a Car Show,
Yes there is LEAK and I found it. The top shell of the manifold is warped
and a crack showed up around the bolt hole. This manifold is a piece of crap and the pics are comming. I will make a call to hinson as I see many things wrong with this manifold. Im not saying the 102 is a bad manifold
but you will see the pics and you will know what I have been through.
a guy who intentionally left the brake hose line off so people would think he had a Cam in it at a Car Show,
Yes there is LEAK and I found it. The top shell of the manifold is warped
and a crack showed up around the bolt hole. This manifold is a piece of crap and the pics are comming. I will make a call to hinson as I see many things wrong with this manifold. Im not saying the 102 is a bad manifold
but you will see the pics and you will know what I have been through.
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Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
When I took the manifold off the leak stuck out like a sore thumb. Anyway
they will ship me a new one and determine how Comp will deal with the
aftermath. I now know what it is thats affecting the LTFT's.
The Folks at HINSON have taken care of Me as well as others getting things shipped quick and are always pretty well stocked. Another thing I may get is a 100 mm MAF. The fit of the 92 TB leaves a lot to be desired.
you can see the edge of the gasket and make you wonder if it is leaking there. For now I may put the 92 back on and check things out.
Drifting
Joined: Jun 2007
Posts: 1,757
Likes: 2
From: Middletown DE
I'm not surprised one bit Leon. The base of my first FAST 92 had the same issue....We were chasing the leak all day and finally realized the problem 
Makes me wonder how many guys are rolling around with leaks and don't even know it
Makes me wonder how many guys are rolling around with leaks and don't even know it
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Joe the manifold is off. Please give me some credit. However I do know
a guy who intentionally left the brake hose line off so people would think he had a Cam in it at a Car Show,
Yes there is LEAK and I found it. The top shell of the manifold is warped
and a crack showed up around the bolt hole. This manifold is a piece of crap and the pics are comming. I will make a call to hinson as I see many things wrong with this manifold. Im not saying the 102 is a bad manifold
but you will see the pics and you will know what I have been through.
a guy who intentionally left the brake hose line off so people would think he had a Cam in it at a Car Show,
Yes there is LEAK and I found it. The top shell of the manifold is warped
and a crack showed up around the bolt hole. This manifold is a piece of crap and the pics are comming. I will make a call to hinson as I see many things wrong with this manifold. Im not saying the 102 is a bad manifold
but you will see the pics and you will know what I have been through.
I'm really glad you figured it out. I knew it was a vacuum leak all along. You will soon be enjoying the Trick Flow/FAST power. I have to save my nickels for the Trick Flows. I could get 10's with them.
I might try for a 10 again with some lightening next winter. I'm nothing if not persistent.
Oh and my good buddy bought another Z06 last weekend....I rode with him....I am clearly banging gears like a guy who broke his tranmission and stroked the check for replacement...my buddy was BANGING gears. I don't do that. I bet I have a .10 in banging gears easy.
Thread Starter
Melting Slicks
Joined: Sep 2007
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Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
No offense meant buddy. I woudn't have said it if I hadn't done it myself.
I'm really glad you figured it out. I knew it was a vacuum leak all along. You will soon be enjoying the Trick Flow/FAST power. I have to save my nickels for the Trick Flows. I could get 10's with them.
I might try for a 10 again with some lightening next winter. I'm nothing if not persistent.
Oh and my good buddy bought another Z06 last weekend....I rode with him....I am clearly banging gears like a guy who broke his tranmission and stroked the check for replacement...my buddy was BANGING gears. I don't do that. I bet I have a .10 in banging gears easy.
I'm really glad you figured it out. I knew it was a vacuum leak all along. You will soon be enjoying the Trick Flow/FAST power. I have to save my nickels for the Trick Flows. I could get 10's with them.
I might try for a 10 again with some lightening next winter. I'm nothing if not persistent.
Oh and my good buddy bought another Z06 last weekend....I rode with him....I am clearly banging gears like a guy who broke his tranmission and stroked the check for replacement...my buddy was BANGING gears. I don't do that. I bet I have a .10 in banging gears easy.
about the physics of whats happening. Well enough for philosophy. The manifold is on its way back and Hinson will send me a new one as soon as they receive this one. Comp will then evaluate it and do whatever.
Ill have some down time to build a leak checker so these manifolds can be leak checked with VAC and pressure and leak the manifold before it ever gets on the Car. I will have a week or so to test the 92.
You said your buddy got a new ZO6 and you went for a ride. How would
you say it compares to yours as far as raw power and acceleration ?
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Your peak power will be higher than a stock z06, peak tq about the same.
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
The 92 is on and works well
It feels fast riding in the passenger seat! But tough to do that kind of comparison. I know that my car runs a few tenths slower than a new Z06 in a sharp driver's hands. Ranger and others get 10's in good weather. Dyno wise new Z06's are about the same rwhp as me but they have 50 more ft lbs of tq peak and a lot more tq down low.
Your peak power will be higher than a stock z06, peak tq about the same.
Your peak power will be higher than a stock z06, peak tq about the same.
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
Hang in there Leon!
I just got the numbers from my 102. I also bought mine from Hinson approx a month ago. I picked up 18 rwhp and 21 rwtq over my ported stocker...
I know it is not an equal comparison with your combo but I achieved those gains on a stock motor with a Vararam intake, AR 1 3/4 catted headers, ported LS2 TB and a street tune.
I feel a ported 102 will out perform a ported 92 on any LS2 setup.
Also, my 102 is unported - just installed it out of the box.
John
I just got the numbers from my 102. I also bought mine from Hinson approx a month ago. I picked up 18 rwhp and 21 rwtq over my ported stocker...
I know it is not an equal comparison with your combo but I achieved those gains on a stock motor with a Vararam intake, AR 1 3/4 catted headers, ported LS2 TB and a street tune.
I feel a ported 102 will out perform a ported 92 on any LS2 setup.
Also, my 102 is unported - just installed it out of the box.
John
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
Hang in there Leon!
I just got the numbers from my 102. I also bought mine from Hinson approx a month ago. I picked up 18 rwhp and 21 rwtq over my ported stocker...
I know it is not an equal comparison with your combo but I achieved those gains on a stock motor with a Vararam intake, AR 1 3/4 catted headers, ported LS2 TB and a street tune.
I feel a ported 102 will out perform a ported 92 on any LS2 setup.
Also, my 102 is unported - just installed it out of the box.
John
I just got the numbers from my 102. I also bought mine from Hinson approx a month ago. I picked up 18 rwhp and 21 rwtq over my ported stocker...
I know it is not an equal comparison with your combo but I achieved those gains on a stock motor with a Vararam intake, AR 1 3/4 catted headers, ported LS2 TB and a street tune.
I feel a ported 102 will out perform a ported 92 on any LS2 setup.
Also, my 102 is unported - just installed it out of the box.
John
Just glad it all worked for you and you didn't have the hastle I did. What were your final numbers ?
Thread Starter
Melting Slicks
Joined: Sep 2007
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From: READING PA
St. Jude Donor '08-'09-'10
I Said there would be pictures.
Pictures 1 and 2 show the lack of clearance on the 102 FAST and where it was catching onto the ARP HEAD WASHERS. Also shows how the FAST 92 has proper clearance..
Picture 3 shows what had to be done in six places to get the proper clearance.
Pictiure 4 shows the FAST 102 on the car after clearance. Looks like a normal install with no visible signs of cracking. The car did drive well except the FUEL TRIMS suggested A big leak as I tried to prove otherwise
through tuning etc the experts proved to me by my own tests I had A LEAK.
Pictures 5 and 6 shows the warpage and crack around the bolt hole. thats what made it obvious and had to come off. I am sick and currently running the FAST 92 after a full day pf repairing & prepping the runners. More pics on that.
Picture 3 shows what had to be done in six places to get the proper clearance.
Pictiure 4 shows the FAST 102 on the car after clearance. Looks like a normal install with no visible signs of cracking. The car did drive well except the FUEL TRIMS suggested A big leak as I tried to prove otherwise
through tuning etc the experts proved to me by my own tests I had A LEAK.
Pictures 5 and 6 shows the warpage and crack around the bolt hole. thats what made it obvious and had to come off. I am sick and currently running the FAST 92 after a full day pf repairing & prepping the runners. More pics on that.
Last edited by LSCHLEM; May 16, 2010 at 01:51 PM. Reason: TYPO
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
Pictures 1 and 2 show the lack of clearance on the 102 FAST and where it was catching onto the ARP HEAD WASHERS. Also shows how the FAST 92 has proper clearance..
Picture 3 shows what had to be done in six places to get the proper clearance.
Pictiure 4 shows the FAST 102 on the car after clearance. Looks like a normal install with no visible signs of cracking. The car did drive well except the FUEL TRIMS suggested A big leak as I tried to prove otherwise
through tuning etc the experts proved to me by my own tests I had A LEAK.
Pictures 5 and 6 shows the warpage and crack around the bolt hole. thats what made it obvious and had to come off. I am sick and currently running the FAST 92 after a full day pf repairing & prepping the runners. More pics on that.
Picture 3 shows what had to be done in six places to get the proper clearance.
Pictiure 4 shows the FAST 102 on the car after clearance. Looks like a normal install with no visible signs of cracking. The car did drive well except the FUEL TRIMS suggested A big leak as I tried to prove otherwise
through tuning etc the experts proved to me by my own tests I had A LEAK.
Pictures 5 and 6 shows the warpage and crack around the bolt hole. thats what made it obvious and had to come off. I am sick and currently running the FAST 92 after a full day pf repairing & prepping the runners. More pics on that.