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Compression-How much is too much?

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3.8K views 32 replies 19 participants last post by  Rokker  
#1 ·
Been a while since I have been on here. I have been in a transition of sorts. I believe I have decided to call it quits with bracket racing after 11 years. I am looking at putting my car back on the street. What I am trying to decide is what direction to go. My current 460 has Brodix RR-O heads, Eagle rotating assembly, 10.5:1 compression, Ede perf. RPM intake, 750HP carb, and a Comp solid roller 236/242 duration at .050. So my biggest question for you guys that have a lot of street tuning experience is how will this combo work on the steet as far as the compression goes? I know 10.5:1 isn't that much but is it too much with this little cam? It cranks at about 195 PSI. I don't want to be having to mix race fuels or buy expensive octane boosters. Just want to run 93 pump gas. Current trans is a full manual TH400 with a 5000 stall 8" ATI converter. That would be tightened up or I may even think about putting the M21 back in it, but am a little unsure if the M21 would hold up to the 460's power. I guess it would if it was with some sense:D.

Other consideration is selling this engine and putting the 396 back in the car along with the M21. When it comes to street cars I'm not all that in to having to have the biggest, fastest most powerful thing out there. A little ole 396 used to be just fine for me on the street. I've had enough of the keeping things together days.
 
#33 ·
Read ignition 101, not really any downside to running vacuum advance on the street. Just a cleaner running, cooler engine that puts out more mpg.