Quote:
Originally Posted by adam728
If you are going to build the engine to be 10:1 compression, then yes, I'd go with what Comp suggested. With iron heads and the low rpm tuning of the TPI manifold that might still be pushing things in terms of detonation at low rpm, high loads.
To run the mpg cam on that link you'd likely want to run compression at no more than 9.0:1.
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If I do remember correctly, the Light Duty TBI motors had a stock compression of 9.4:1 and they ran that itty bitty 166/175 cam with 112 LSA. The HD motors had 8.3:1 compression. Vortec 350's had 9.4:1
Here is a link to the info ->
95 LO5, Vin K, 5.7 TBI: Compression? - PerformanceTrucks.net Forums
My motor will have a 9.72:1 static compression with the present build, & and 8.103 DCR. So in theory! All should be well.
The key is the intake valve closing point
Edit: From what I can infer from Crower Cams website, the stock cam had roughly 10* of overlap and an excellent cylinder filling intake cycle. I do not doubt that the DCR was higher stock than will be in my build.