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Thread: Blow through problems
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07-24-2007 #1
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- Join Date
- Aug 2004
- Location
- Kiler wisconson
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- 400
Im running a procharger prepped holley 750. 75/85 jets.. it runs very good, probobly not perfect by some of your standards but very good.. (i gave someone on the site a ride in it and i think he was impressed)
I am running 36degrees total timing and no cintrifical advance..Project JUST-N-SANE
84' Camaro Z-28, 355CID,9.0-1 compression, ATI procharger 9psi (over 650HP),T56 6 speed, 3.73 Motive gears! 11.70 at 122mph in the 1/4 while babying the throttle to keep the tires hooked ,with pump gas! (NOW INTERCOOLED)
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06-21-2008 #2
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- Mar 2007
- Posts
- 97
Well Im back with an update. i had a carb worked over by Kevin at CSu and I must say im very happy with it so far. I brought it down to the dyno and it idles nice and has a wonderful wide open throttle with some minor jet changes. Now that Im out on the street. Im noticing I have a lean spot on partial throttle. When I bring the rpms up slowly get ready to crack on it at 3200 to 3500 and my wideband starts to show a lean condition. i think this attributed to my pump cam. I have the green ones in there now at position one. Im not sure which way to go from here. I had it sneeze once on me. Now I just cruise around watching the wideband so I dont make it sneeze. Anyone have any ideas on what type of pump cam to put in this. Maybe I need a bigger shooter possibly. Any ideas would be appreciated.
Almost there MikeHolley HP EFI, Procharged D1SC, 383 Dart Little M block and forged internals. 15.5 psi on E85! Chromoly Fab 9 rear end with Strange Pro Iron center diff, 3.89's and a Chomoly 4 point roll bar. Yes, its still a 4 speed car!
06-21-2008 #3
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- Mar 2007
- Posts
- 97
I changed the pump cams to the brown ones from the green ones and she launched perfect. wheels and procharger spinning. A shout out to kevin and CSU for the help with the e85 conversion. Time to go racing!
Holley HP EFI, Procharged D1SC, 383 Dart Little M block and forged internals. 15.5 psi on E85! Chromoly Fab 9 rear end with Strange Pro Iron center diff, 3.89's and a Chomoly 4 point roll bar. Yes, its still a 4 speed car!
06-22-2008 #4
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- Join Date
- Mar 2007
- Posts
- 97
oh yeah and Hi tech motorsports for there dyno time and knowledge. They have some of the best facilities I've seen.
great people to work with.
Holley HP EFI, Procharged D1SC, 383 Dart Little M block and forged internals. 15.5 psi on E85! Chromoly Fab 9 rear end with Strange Pro Iron center diff, 3.89's and a Chomoly 4 point roll bar. Yes, its still a 4 speed car!
07-21-2008 #5
Registered User
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- Jul 2008
- Location
- Oklahoma City
- Posts
- 18
I am glad you got this all worked out. I read this post thoroughly and kept thinking I was going to have to post. "STOP DROPPING JET SIZES that's not where the problem is." Kevin did mine and so far 3 years later so good.
I thought at one time I had a carb problem when I tried lowering the boost. I took the carb apart and stood in awe of the modifications. I have over 20 yrs experience with Holley carbs and I have to say Kevin's attention to detail and phone support are second to none. I would say the phone support alone is worth the expenditure on the carb. Got any RWHP numbers with new carb yet?
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