What head gasket to use?
What head gasket to use? Its a 383 with forged flat tops and I will be running Le3 heads. This car will have nitrous and A LOT of it lol. Which head gasket will be best for this setup. It will have about 12.5:1 compression, but I am trying to get it down to 12 to 1.
the pistons are zero decked in the hole
no head gaskets are used yet because its a new engine.
pistons are 12.1
dome volume is 6cc
comp. height 1.125
236/240 .592/.592 cam specs
Le3 heads 57cc
4.030, 3.75 stroke and a 6" rod hope this helps everyone
What else do I need for you guys to tell me what you have. How bout you Joe? ramairta95? My setup is kinds like yours, what do you have?
anyone else, thanks
hows this head gasket for a 200 shot?? mls 3140g by mr gasket?
the pistons are zero decked in the hole
no head gaskets are used yet because its a new engine.
pistons are 12.1
dome volume is 6cc
comp. height 1.125
236/240 .592/.592 cam specs
Le3 heads 57cc
4.030, 3.75 stroke and a 6" rod hope this helps everyone
What else do I need for you guys to tell me what you have. How bout you Joe? ramairta95? My setup is kinds like yours, what do you have?
anyone else, thanks
hows this head gasket for a 200 shot?? mls 3140g by mr gasket?
Last edited by aug181983; May 5, 2010 at 09:40 PM.
cant give him them..he says he has 12.5-1 now but dont list his head cc or what the gasket thickness is right now he using..he also dont say how much down in the bore he is atleast or really gives comp height on his piston and the deck height so some one can do the math..
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I'm a big proponent of a tighter quench (.030" to .035").
You say you have domed pistons in a +6cc volume. If that's the case with those heads, your SCR is going to be through the roof (14.0:1+) even with a thick head gasket. Are you sure you don't have flat-tops in a MINUS 6cc? If that's the case, then with an .040" gasket, your SCR would be around 12.0:1. Using a .028 Impala head gasket will put you around 12.3:1.
I would go with the .040" gasket like Wicked mentioned.
You say you have domed pistons in a +6cc volume. If that's the case with those heads, your SCR is going to be through the roof (14.0:1+) even with a thick head gasket. Are you sure you don't have flat-tops in a MINUS 6cc? If that's the case, then with an .040" gasket, your SCR would be around 12.0:1. Using a .028 Impala head gasket will put you around 12.3:1.
I would go with the .040" gasket like Wicked mentioned.
I'm a big proponent of a tighter quench (.030" to .035").
You say you have domed pistons in a +6cc volume. If that's the case with those heads, your SCR is going to be through the roof (14.0:1+) even with a thick head gasket. Are you sure you don't have flat-tops in a MINUS 6cc? If that's the case, then with an .040" gasket, your SCR would be around 12.0:1. Using a .028 Impala head gasket will put you around 12.3:1.
I would go with the .040" gasket like Wicked mentioned.
You say you have domed pistons in a +6cc volume. If that's the case with those heads, your SCR is going to be through the roof (14.0:1+) even with a thick head gasket. Are you sure you don't have flat-tops in a MINUS 6cc? If that's the case, then with an .040" gasket, your SCR would be around 12.0:1. Using a .028 Impala head gasket will put you around 12.3:1.
I would go with the .040" gasket like Wicked mentioned.
Nope the part number is sbc125030d05 and its +6
When doing the math I had just checked a website calculator and found out that with a 4.030 bore 3.75 stroke and this piston and 57cc head and using a .040" head gasket I would have 11.9 compression ratio. Where did you get your info. I know your better than me with this stuff but im really confused now.
Nope the part number is sbc125030d05 and its +6
When doing the math I had just checked a website calculator and found out that with a 4.030 bore 3.75 stroke and this piston and 57cc head and using a .040" head gasket I would have 11.9 compression ratio. Where did you get your info. I know your better than me with this stuff but im really confused now.
When doing the math I had just checked a website calculator and found out that with a 4.030 bore 3.75 stroke and this piston and 57cc head and using a .040" head gasket I would have 11.9 compression ratio. Where did you get your info. I know your better than me with this stuff but im really confused now.
I hope this helps ya
Using this calculator and the following data:
Bore 4.030"
Stroke 3.75"
Deck height 0
Gasket Thickness .040"
Head volume (57cc MINUS the +6cc of the pistons) 51cc
...I get 14.2:1 static compression.
The part number for the pistons that you provided doesn't show up via any search. Can you link me to the Summit page?
Bore 4.030"
Stroke 3.75"
Deck height 0
Gasket Thickness .040"
Head volume (57cc MINUS the +6cc of the pistons) 51cc
...I get 14.2:1 static compression.
The part number for the pistons that you provided doesn't show up via any search. Can you link me to the Summit page?
Using this calculator and the following data:
Bore 4.030"
Stroke 3.75"
Deck height 0
Gasket Thickness .040"
Head volume (57cc MINUS the +6cc of the pistons) 51cc
...I get 14.2:1 static compression.
The part number for the pistons that you provided doesn't show up via any search. Can you link me to the Summit page?
Bore 4.030"
Stroke 3.75"
Deck height 0
Gasket Thickness .040"
Head volume (57cc MINUS the +6cc of the pistons) 51cc
...I get 14.2:1 static compression.
The part number for the pistons that you provided doesn't show up via any search. Can you link me to the Summit page?
http://www.race-mart.com/Mahle_PowerPak_Guide.asp
I see it, and stand by my most recent post. Maybe I'm overlooking something...perhaps someone else can chime in, but there's no reason you should be using a domed piston, IMO.