Ok, thanks for the help!
Ok, thanks for the help!
-Frank
1987 GMC Suburban K2500 400SBC, TH400 Trans, 3.73 Gears
1995 GMC Suburban K2500 454BBC, 4L80E Trans, 3.73 Gears
Looking at you idle has me thinking you may not need a new cam? Idle MAP is up a little like an aftermarket cam, but not ridicules. I'm wondering if your off idle power BLAH could not be improved with some tuning/spark?
Where's Fast when you need him?
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Id be all for that... Open to all suggestions...
-Frank
1987 GMC Suburban K2500 400SBC, TH400 Trans, 3.73 Gears
1995 GMC Suburban K2500 454BBC, 4L80E Trans, 3.73 Gears
Why was I thinking this motor had a cam. Also what heads casting is it running? If its an 882 or 993 or other open chamber smog head and running a stock dished piston it could very well be as low as 8:1 compression. Larger duration cams would certainly make the low-end soggy. 882 heads need lots of timing.Originally Posted by EagleMark
Looking at you idle has me thinking you may not need a new cam? Idle MAP is up a little like an aftermarket cam, but not ridicules. I'm wondering if your off idle power BLAH could not be improved with some tuning/spark?
Where's Fast when you need him?
Don't remember the casting number for sure, but I cc'd everything when I got it and figured it was 8.6:1 compression.
Only reason I'm figuring it has a cam for a lighter application is the low-ish vacuum and tha lack of low end torque. Figured it was build for a camaro or something... Never knew the guy who had it built.
-Frank
1987 GMC Suburban K2500 400SBC, TH400 Trans, 3.73 Gears
1995 GMC Suburban K2500 454BBC, 4L80E Trans, 3.73 Gears
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