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-   -   3.2 to a 3.4 10.5:1 v 12.5 :1 what increase? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1004466-3-2-3-4-10-5-1-v-12-5-1-what-increase.html)

slow car 08-09-2018 01:47 AM
3.2 to a 3.4 10.5:1 v 12.5 :1 what increase?
 
Hi Engine gurus,
I have a twin plugged 3.4 with 10.5:1 compression, GE 60 cams, 46 PMO
What increase HP & toque could i expect if i install 12.5:1 Pistons?
Any one have built such a engine and have dyno numbers?
I can run up to 112 fuel.
Thanks

Lyle O 08-09-2018 03:45 AM
What are you getting now? Will depend on timing also. 12.5:1 is pretty high, even on 112 gas...

BURN-BROS 08-09-2018 05:54 AM
How about you run a set of PMO 50's instead?

BURN-BROS 08-09-2018 06:18 AM
How about you run a set of PMO 50's instead?

slow car 10-14-2019 02:53 AM
Why PMO 50mm?


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