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#1 |
Registered User
Join Date: Jun 2007
Location: Lacey, Wa
Posts: 181
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After the math
After doing the math and looking up piston #'s. Why would someone build an engine with 7.9 compression and drop it in a truck without running a blower or turbo? Talk about NO power. Guess i should start looking for a set of cheap pistons
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1970 ![]() SBC350 / TH350 '84 C20 Front Disc Brakes/Control Arms |
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#2 |
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Location: bolivar, mo
Posts: 839
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Re: After the math
85 or 86 octane gas?
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1997 shortie stepside 1968 short stepside 1966 mustang 1966 chevelle ss Dont always go the cheapest route--You can save yourself into the poorhouse! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=489030 |
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#3 |
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Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: After the math
Possibly didn't know what they were doing, or they were building a blower motor and ran out of $$.
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Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#4 |
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Location: Forestburg, Texas
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Re: After the math
2x. Blower motor or stupid.
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Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks |
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#5 | |
Registered User
Join Date: Jun 2007
Location: Lacey, Wa
Posts: 181
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Re: After the math
Nope This is Washington. 87 - 93
Quote:
![]() ![]() ![]() ![]() Yeah ok thats not feasable on my budget. ![]()
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1970 ![]() SBC350 / TH350 '84 C20 Front Disc Brakes/Control Arms |
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#6 |
Senior Member
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Location: Cedar Park, Texas
Posts: 7,496
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Re: After the math
Are you sure they are aftermarket postons and not stock dished? What is the bore size?
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#7 |
Registered User
Join Date: Jun 2007
Location: Lacey, Wa
Posts: 181
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Re: After the math
The engine is bored over +60, and the PO said that he bought the engine from a buddy when he threw a rod in the original 350
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1970 ![]() SBC350 / TH350 '84 C20 Front Disc Brakes/Control Arms |
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#8 |
Registered User
Join Date: Jun 2007
Location: Lacey, Wa
Posts: 181
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Re: After the math
I guess the question is, should I pick up flat tops or slightly domed... I will be running stocker heads 76cc due to budget.
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1970 ![]() SBC350 / TH350 '84 C20 Front Disc Brakes/Control Arms |
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#9 | |
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Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: After the math
Quote:
From there, you can probably get up to 9.5:1 depending on what you buy. Big limit is the stock heads, and you probably won't make a ton more power going any higher. I'm almost done building a 327, .030" over with 291 double hump 62cc heads. Flat tops are calculating at 9.6:1 compression. I'm gonna have to run premium in it.
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Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#10 |
Senior Member
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Location: Cedar Park, Texas
Posts: 7,496
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Re: After the math
I have run flat tops pistons with old 461 double hump heads on 350's and 383's and a thick head gasket on 87 in the past but you cant run a lot if timing. I forget the details as my brother built it for me but it was a daily driver and remember i would add timing and run 91 octane on ocassion and it really woke up! I later switched to 64cc brodix track1 heads and it was alot more detonation proof due to the heads dissipating the heat better.
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#11 |
Senior Member
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Location: Cedar Park, Texas
Posts: 7,496
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Re: After the math
I wouldnt run more than a flat top on the street with iron heads uess you want to spring for the extra octane and imo it wont get you much extra power in return.
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