how much compression i need 11.54 or 12?
#1
how much compression i need 11.54 or 12?
i will be running a 402 with -2cc diamond pistons i calculated the compression and with the GM 0.056" head gasket i will get 11.54 compression with the 0.040" fel-pro i will get 12 compression. i will use the TSP Giant cam : 248/254 0.622"/0.614" 112lsa 110icl. what compression is adequate and streetable with this cam? i can use up to 98 octane unleaded fuel.
thanks for help.
thanks for help.
#4
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yeap, it will raise the DCR as well. Be careful running that much compression in our Summer heat.
I would keep the DCR at 8.5 max unless this is a drag only car on cooler nights.
I would keep the DCR at 8.5 max unless this is a drag only car on cooler nights.
#7
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I'm not sure, but I know Saudi Arabia uses a different system of octane ratings than we do. Their "premium" grade is around 95, but when measured under our system, it's the equivalent of our 91 octane. If you're not sure on this, make sure and verify that before deciding. 12:1 is ok with our 93 octane, but you're close to the limit even with a big cam like that. You probably won't be able to run much timing advance without running into pinging and detonation.
Jason
Jason
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#11
we have 90, 95 and 98 octane unleaded fuels. the 90 fuel is for 60 fils per liter or about 20 cents per liter or $ 0.75 per gallon. the 95 fuel is 65 fils per liter or about 22 cents per liter or $0.83 per gallon. the 98 fuel is for 90 fils per liter or 30 cents per liter or $1.13 per gallon.
Last edited by Abdullah; 04-22-2006 at 11:28 PM.
#12
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I have a feeling the South doesn't get nearly as hot as those guys get. I work with poeple that spend alot of time in the UAE, Qatar and Kuwait and I've heard it's pretty bad when you're looking to find shade under a camel (not meant in any dispareging way)
I'm not sure about the humidity though...I think our South might have them there.
I'm not sure about the humidity though...I think our South might have them there.