#11
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11-12 is usually considered minimum. I think I am making 7-9HG and my power brakes worked but were not the easiest as the pedal was kind of hard at times.
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Eric 496 cu. in. "cruiser" Assembled & tuned by Mo's Speed Shop - Dallas, GA |
#12
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Thanks Flash. It's what sold me. I'll update my profile and get some pics posted. Thanks again!
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#13
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This. I tend to not like a cam with less than 15-16 inch/hg for a driver/cruiser. (I'm getting old)
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#14
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I have not yet had the chance to test vacuum yet but I did have a question. While working on the rear end this weekend I noticed the fuel lines coming out of the gas tank, the rubber sections look like they need replacement. I believe one of those lines is a vacuum line is that correct?
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#15
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I think one line is just a return line ,no vacuum I think .
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John |
#16
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I'll have to look into it. It seems as though there were at least 3 lines coming out of the tank
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#17
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Finally got a chance to measure the vacuum. I have about 6-7 HG at idle. I'll need to look into an electric vacuum pump or the hydropump. I am sure there is much opionions about what is best and what people like. the Hydropump seems to solve the problem and not look bad either. Any feedback would be appreciated.
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#18
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When you say hydro pump, do you mean a hydro boost set up? Like what Turbo Buick Regals had? And what the late model Ford Mustangs employ? It relies on the PS pump and fluid, no vacuum involved. 6-7 is horrible, must be a really lumpy cam with a lot of overlap.
__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#19
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I purchased the car with the rebuilt engine but I did get the cam specs and talk to Comp Cam. intake lift is .508 and exhaust is .511- And yes I did mean hydro boost. Reading other fourms/threads, I hear of it often being used successively albeit has cost associated with it
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#20
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Lift wouldn't be the deciding factor. What are the specs for ICL, LSA, and the duration at .004" & .050"? Those are the numbers that are used to determine the manners of a camshaft.
__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
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