Cometic head gaskets.... .040 vs. .045?
Cometic head gaskets.... .040 vs. .045? I just got my heads cam package in the mail today.
TEA 1.5 5.3 heads milled less than .005
Comp cams 220/224 .581 114lsa +2
Trick flow chromoly hardened pushrods (7.4)
Cometic head gasket .040
I was wondering if this was the right gasket. Most people seem to be using .045. What difference will it make?
TEA 1.5 5.3 heads milled less than .005
Comp cams 220/224 .581 114lsa +2
Trick flow chromoly hardened pushrods (7.4)
Cometic head gasket .040
I was wondering if this was the right gasket. Most people seem to be using .045. What difference will it make?
The compression will be that high???
I wanted 11:1 or less. It's for a daily driver.
We're in Florida so I do get 93 octane.
Would I be better off mailing those back and going with a GM stock gasket? I can get those locally most likely.
I wanted 11:1 or less. It's for a daily driver.
We're in Florida so I do get 93 octane.
Would I be better off mailing those back and going with a GM stock gasket? I can get those locally most likely.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by silverTA2002
The compression will be that high???
I wanted 11:1 or less. It's for a daily driver.
We're in Florida so I do get 93 octane.
Would I be better off mailing those back and going with a GM stock gasket? I can get those locally most likely.
I wanted 11:1 or less. It's for a daily driver.
We're in Florida so I do get 93 octane.
Would I be better off mailing those back and going with a GM stock gasket? I can get those locally most likely.
With 93 and a professional tune 11.5 is nothing to worry about. The tighter quench will help reduce detonation. Just run TR6 plugs gapped .035.
Keep the .040
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Originally Posted by PREDATOR-Z
Ported heads are usualy around 62>63 cc in the chamber
With 93 and a professional tune 11.5 is nothing to worry about. The tighter quench will help reduce detonation. Just run TR6 plugs gapped .035.
Keep the .040
With 93 and a professional tune 11.5 is nothing to worry about. The tighter quench will help reduce detonation. Just run TR6 plugs gapped .035.
Keep the .040
Will those not work?
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Verdad Gallardo I just used this http://www.rbracing-rsr.com/compstaticcalc.html to calculate my compression ratio. I just don't know if the numbers I used are all correct.
Bore- 3.898 inches
Stroke- 3.622 inches
Head gasket- .040 inches
Deck Height- -.007 inches
Piston top volume- 0
Combustion chamber- 63cc
I got 11.19 compression. That won't be too bad for a daily driver right?
Bore- 3.898 inches
Stroke- 3.622 inches
Head gasket- .040 inches
Deck Height- -.007 inches
Piston top volume- 0
Combustion chamber- 63cc
I got 11.19 compression. That won't be too bad for a daily driver right?
On a related note..... Here are my flow numbers:
.10 69.1 51.3
.20 140.3 113.9
.30 204.2 174.1
.40 253.0 214.0
.50 290.3 241.4
.55 301.9 251.1
.60 313.4 255.1
I'm pretty happy with them.
.10 69.1 51.3
.20 140.3 113.9
.30 204.2 174.1
.40 253.0 214.0
.50 290.3 241.4
.55 301.9 251.1
.60 313.4 255.1
I'm pretty happy with them.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by silverTA2002
Plugs are something I haven't even thought about. I'm running TR55s right now.
Will those not work?
Will those not work?
11.5 SCR , .035 gap >> 11.0 SCR .040 gap (those ranges worked very well for me), and if you think Florida is humid/hot, just come for a weekend overhere
I know this is off topic but, would it be worth it to put .040 gaskets with stock 241 heads? Would it make more power? or would it just cause problems? I also have a TSP225 cam. Thanks,
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by FDLS1
I know this is off topic but, would it be worth it to put .040 gaskets with stock 241 heads? Would it make more power? or would it just cause problems? I also have a TSP225 cam. Thanks,
This woud raise your compression and improve your quench. (both giving you more power)
Your CR would be ~ 10.68
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Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
It will not affect your PTV (it will reduce it but no issues, still plenty room)
As for the p-rods you'll need 7.40-.014 = 7.36 or 7.35 p-rods(that is assuming you are at optimum lifter preload now), if you are on the loose side, 7.40's would still work.
As for the p-rods you'll need 7.40-.014 = 7.36 or 7.35 p-rods(that is assuming you are at optimum lifter preload now), if you are on the loose side, 7.40's would still work.
