Went to the track......what could be wrong??!!
Thread Starter
Team Owner
Joined: Feb 1999
Posts: 34,454
Likes: 665
From: Republic of Texas
Re: (scorp508)
Is that .480" before or after the 1.6 rockers? If before then its running about .512"/.512".
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Re: (Corey 68)
I agree with the injectors...
I also wonder about the throttle body. it sounds large to me. and if I remember what someone posted recently, that a too large throttle body will kill top end performance....
I also wonder about the throttle body. it sounds large to me. and if I remember what someone posted recently, that a too large throttle body will kill top end performance....
Thread Starter
Team Owner
Joined: Feb 1999
Posts: 34,454
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From: Republic of Texas
Re: (bogus)
I also wonder about the throttle body. it sounds large to me. and if I remember what someone posted recently, that a too large throttle body will kill top end performance....
Le Mans Master
Joined: Aug 2000
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From: Lost in the mountains of TN
Re: (Corey 68)
True, but we followed Lingenfelter's recipie for power per his book. We even chose the same hydraulic cam he reccomened for the Super Ram.
Le Mans Master
Joined: Apr 2000
Posts: 6,341
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From: Shelton CT
Re: (Corey 68)
I think the only solution will be if you can find a tech local to you who knows engines and who can maybe peek inside your block... The 58mm should be fine for a 383 with an SR. I see those all the time in the 11's..
Not sure about the Injectors, but shouldn't the computer be able to tune thos edown using a lower pulse width? You said you had a custom chip burned. Did they have all the info for the car?
Not sure about the Injectors, but shouldn't the computer be able to tune thos edown using a lower pulse width? You said you had a custom chip burned. Did they have all the info for the car?
Thread Starter
Team Owner
Joined: Feb 1999
Posts: 34,454
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From: Republic of Texas
Re: (BiZ)
I would think that he would recommend the 74219 for 383 S/R applications. I mean after all the 74219 is the Super Ram Cam.
One roller........ the "219"
And one non-roller hydraulic........the one we went with
Thread Starter
Team Owner
Joined: Feb 1999
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From: Republic of Texas
Re: (MrNuke)
You said you had a custom chip burned. Did they have all the info for the car?
Melting Slicks
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From: PITTSBURGH PA
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Re: (Corey 68)
you said a summit cam a summit cam is not the lpe 219 cam just because it says 219 480 lift that means nothing the intake and exhaust events could be off like night and day the lobe centerline the overlap what was it degreed into and so on i dont remember lingenfelter putting 36lb injector on those motors either or useing cast iron cylinder heads 202 valves but what do they flow too many miss match parts to start with :cheers:
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Melting Slicks
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From: PITTSBURGH PA
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Re: (CORKVETTE1)
that computer cant turn down those injectors i would start with pull those 36s out replace with 24lb injectors and get the prom reburned ill bet those injectors are not even in the ball park look at my car i am only running 24s duty cycle between 70-80 % and 37-42 psi :cheers:
Instructor
Joined: Jul 2001
Posts: 119
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From: FINLAND
Re: Went to the track......what could be wrong??!! (Corey 68)
Hmm... the parts seem to be ok.
How about fuel pump?
Have you checked the fuel pressure?
It might go down when rpms go up.
You might need a little beefier pump.
Just my 5 cents...
Burning Brakes
Joined: Jan 2001
Posts: 1,169
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From: Manhattan
Re: (Corey 68)
you could also put it on a dyno. don't just look at peak numbers, but the shape and quality of the curves, also, if you don't have cats, you'll get an accurate air/fuel ratio.
and hook up a scanner while it's on the dyno, that will give you some more info to find the problem.
and get rid of those injectors, they are probably just dribbling fuel out instead of misting fuel.
and hook up a scanner while it's on the dyno, that will give you some more info to find the problem.
and get rid of those injectors, they are probably just dribbling fuel out instead of misting fuel.
Team Owner
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
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Re: (Corey 68)
The injectors are #30 NOT #36, like I had thought.
Team Owner
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From: SE NY
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Re: Went to the track......what could be wrong??!! (Corey 68)
Schedule up some dyno pulls and put a scan tool on it to see what's hapening inside at WOT.
If possible with a SR, install an AFPR and fuel gauge so you can do some tuning. This will give you a good idea of what direction to go, if needed, on injectors.
If possible with a SR, install an AFPR and fuel gauge so you can do some tuning. This will give you a good idea of what direction to go, if needed, on injectors.