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Discussion Starter · #1 ·
Hey guys! I’ve got a 30 over LA 360 that was on the propane and propane accessories. I drove the truck it came out of and by no means was it a slug. Compression test show just about 190psi a hole. What does this translate into as a ratio? 10:1 or? Also thoughts on the Holley sniper EFI system?
Thanks
 

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'79 Macho 360 Magnum, Comp 480 cam, Hughes springs, 650 Thunder AVS, Pertronix Flamethrower ignition
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You can't truly relate static compression and dynamic compression. Camshaft profile plays a significant role also. I would imagine that your engine could be around the 10.5:1 But who really knows. An example of the math is as follows: (it's much easier to attach a link than type it all out. Cheers!

https://en.m.wikipedia.org/wiki/Compression_ratio
 

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but all that said 190 is up there ....
 

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TODAY , but 190 was sorta common years ago ....
 

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last time i tested my 81 it was in the 170-180 range and i am pretty sure it is stock. i can't really say much about the holley setup but i got the fitech setup and i don't think it likes the cold weather at all. almost wishing i had just stuck with carb. simpler and at least the truck started all the time. i can't even use the remote start i installed with the fitech in the cold because the fitech won't start easily in the cold.
 

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Discussion Starter · #8 ·
Thank for the info guys. Yooos the bestest!
 
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