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triple x tx
05-19-2002, 11:26 PM
i am running a 496 bbc 8 to 1 pistons unmodified 781 oval port heads and a 6-71 little field blower overdriven with a 52 on bottom and a 51 on top.....i am making 10 lbs of boost at approx. 5000 rpm!!!!!!!!!that doesnt seem right to me,i think that is too much...i was told its my heads not letting me flow enough...what do you guys think??????? p.s. my gauge is a brand new autometer just for info
Unchained
05-20-2002, 03:41 AM
What are your cam specs?
DEL51
05-20-2002, 04:47 PM
I think you may have something there,think of the whole package, intake, heads, cam, and exhaust affect the air flow through the motor.Are you running headers? What is the overlap?
DEL51
05-20-2002, 04:47 PM
I think you may have something there,think of the whole package, intake, heads, cam, and exhaust affect the air flow through the motor.Are you running headers? What is the overlap?
triple x tx
05-20-2002, 11:43 PM
my cam is a 292 comp....550 lift 244 duration at 50...yes im running headers,bassett twisties
riodog
05-21-2002, 12:16 AM
TXT, according to the charts I have, you are only overdriving the blower 2%, and with 496 cu in's that only comes out to about 2lbs of pressure, for a final comp ratio of about 9.1 . Where are you getting your reading from and is the gauge mechanical or electrical?
triple x tx
05-21-2002, 12:57 AM
mechanical auto meter and its brand new
triple x tx
05-21-2002, 12:58 AM
getting reading off the intake
DetroitJim
05-21-2002, 05:11 AM
I'm thinking maybe your cam is installed wrong? Or maybe the heads have the small intake valves and the throat area is restricted? Something is goofy, I only got 10 lbs of boost with a Mike Kuhl 8-71 front discharge blower on a 454 with oval merlins.
hulshot
05-23-2002, 07:15 PM
Small ports and installed at 99 to 105 intake centerline. Backs the pressure up in the manifold. Just my 2 cents.
SOUTHWIND377
06-02-2002, 12:49 PM
You are reading manifold pressure when I mean manifold pressure I think you are building up pressure in the manifold and its not a true boost reading, I have a 6-71 littlefield 5% over on a 454 and it makes 11 lbs. of boost. just my 2 cents
[This message has been edited by SOUTHWIND377 (edited June 03, 2002).]
Jrocket
06-03-2002, 04:02 PM
Originally posted by triple x tx:
getting reading off the intake
Did you tap into a water passage? Had to ask.
triple x tx
06-07-2002, 08:41 PM
no...its a bds intake,it came with a spot already drilled and tapped from the factory