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Intake Manifold Questions/rethinking...

Posted By rgrove 15 Years Ago
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rgrove
Posted 15 Years Ago
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Hi all.  Im starting to second guess my selection of intake manifolds, and I figured Id ask the experts to get some additional thoughts.

Car is a 56 Sunliner w/a 292, FOM, with blue thunder intake and (currently) an edelbrock 500 carb.  Dizzy is a '57 type w/pertronix.  Cam is from mummert - 224 duration at .050 lift for intake & exhaust, with 110 seperation.  (grind number is 270-3; bought it from mummert per his recommendation)

Issue that Ive been struggling with is a sloppy low end throttle response/lack of torque.  I know some of that is the cam, but after doing some reading, and based on some new tests, etc (i.e. Teds research/thoughts), Im starting to seriously wonder if Id be better off with a different intake?  Most opinions seem to be that the blue thunder makes less TQ than a B manifold below about 4k revs or so, if im reading info properly.  Problem is that with my FOM, my car hardly ever sees over 4k, even under WOT.  So Im wondering if Id increase around town driveability if I went to an OE "B" manifold?  I know that John M is working on a new Blue Thunder that is supposed to be better in the low end, but I havent seen/heard when that will be available....

Other question is if I should be running a bigger carb...with either manifold.  Also, if consensus is that a B manifold is better, what is a reasonable price to look for?  And woudl it have to be bored out for use with a holley or edelbrock carb?

Thanks to any and all for constructive thoughts and help!!!!

Ron Grove

Wauconda, IL


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Forum Post Intake Manifold Questions/rethinking... By rgrove ( 15 Years Ago )
Forum Post I have no experience with a blue thunder, but what you DON'T want with... By Hoosier Hurricane ( 15 Years Ago )
Forum Post It sounds to me like for your use, you have a decent combination. I... By bird55 ( 15 Years Ago )
Forum Post Yeah, I have played with carbs and timing, etc. I had a thread a... By rgrove ( 15 Years Ago )
Forum Post For your purposes a B maniflod would probably work better than what... By PWH42 ( 15 Years Ago )
Forum Post zp cfjmoefwl By speedpro56 ( 15 Years Ago )
Forum Post My computer is acting up:w00t:???? Here goes again, Your combo may do... By speedpro56 ( 15 Years Ago )
Forum Post About your lack of low RPM torque and drivabilty issues I think you... By Pete 55Tbird ( 15 Years Ago )
Forum Post at this point im not going to change the cam, and not looking to... By rgrove ( 15 Years Ago )
Forum Post Howdy; I think PWH42 is correct on using a ECZ-B intake. I was told... By Old Y Block ( 15 Years Ago )
Forum Post rgrove, You should be ok with the cam you have, it's for a stock... By speedpro56 ( 15 Years Ago )
Forum Post [quote][b]speedpro56 (1/24/2010)[/b][hr]rgrove, You should be ok with... By rgrove ( 15 Years Ago )
Forum Post When the cam was installed was it set to the correct degree or did you... By Y block Billy ( 15 Years Ago )
Forum Post [quote][b]Y block Billy (1/24/2010)[/b][hr]When the cam was installed... By rgrove ( 15 Years Ago )
Forum Post If the camshaft was not degreed in when it was installed, then... By Ted ( 15 Years Ago )
Forum Post [quote][b]Ted (1/24/2010)[/b][hr] If the camshaft was not degreed... By rgrove ( 15 Years Ago )
Forum Post Yes, my Blue Thunder intake has modifications for more flow and that... By speedpro56 ( 15 Years Ago )
Forum Post I think your vacuum should be somewhere around 15" or better. If you... By charliemccraney ( 15 Years Ago )
Forum Post When I had a damper rebuilt the damper doctor got it way off. Had to... By speedpro56 ( 15 Years Ago )
Forum Post [quote][b]speedpro56 (1/26/2010)[/b][hr]When I had a damper rebuilt... By rgrove ( 15 Years Ago )
Forum Post There may be other issues with the poor low end performance you... By PF Arcand ( 15 Years Ago )
Forum Post Thanks! I guess somehow I gave the wrong impression or something. It... By rgrove ( 15 Years Ago )
Forum Post [quote][b]rgrove (1/24/2010)[/b][hr]

Issue that Ive been...
By charliemccraney ( 15 Years Ago )
Forum Post yup, poor choice of words on my part referring to it as "sloppy"!... By rgrove ( 15 Years Ago )
Forum Post ron, i was watching that manifold too.. keep your eyes peeled for... By bloodyknucklehill ( 15 Years Ago )
Forum Post [quote][b]bloodyknucklehill (1/26/2010)[/b][hr]ron, i was watching... By rgrove ( 15 Years Ago )
Forum Post I have a BT on my bird right now and I have had a ported iron B. Mine... By Doug T ( 15 Years Ago )


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