Cometic .040 head-gaskets on street-only, NON Daily Driver...
02-06-2006, 08:58 PM
#1
Cometic .040 head-gaskets on street-only, NON Daily Driver... Experimenting again and looking for info/experience on .040 head gaskets on street cars, no real strip work. Changing cam in two weeks and thinking of head-gasket change...
-pistons showed approx. .007-.008 out of the hole... should put my quench at .032-.033
-current mods (other than new cam) in sig.... trying to push DCR up to around 8.63ish, currently 8.3 (every little bit counts in a H/C car
)
Any info appreciated...
-pistons showed approx. .007-.008 out of the hole... should put my quench at .032-.033
-current mods (other than new cam) in sig.... trying to push DCR up to around 8.63ish, currently 8.3 (every little bit counts in a H/C car
)Any info appreciated...
Last edited by SideStep; 02-06-2006 at 09:06 PM.
02-07-2006, 06:37 AM
#4
TECH Senior Member
That quench is fine.
The only issue would be lots of stop and go traffic and carbon build up. A little more timing and a little less fuel (leaner stoich) would help.
Just check PTV clearance since you'll be loosing .05 both int/exh
The only issue would be lots of stop and go traffic and carbon build up. A little more timing and a little less fuel (leaner stoich) would help.
Just check PTV clearance since you'll be loosing .05 both int/exh
02-07-2006, 07:26 AM
#5
Originally Posted by PREDATOR-Z
That quench is fine.
The only issue would be lots of stop and go traffic and carbon build up. A little more timing and a little less fuel (leaner stoich) would help.
Just check PTV clearance since you'll be loosing .05 both int/exh
The only issue would be lots of stop and go traffic and carbon build up. A little more timing and a little less fuel (leaner stoich) would help.
Just check PTV clearance since you'll be loosing .05 both int/exh
226/230 .585/.592 112LSA 111ICL, looking for something more wife friendly ...
02-07-2006, 07:59 AM
#7
Originally Posted by George V
I am considering the Cometics also, but concerned about proper prep so they don’t leak. Who has the 0.040 for stock bore in stock? I found .045
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02-07-2006, 08:37 AM
#9
TECH Senior Member
Originally Posted by George V
I am considering the Cometics also, but concerned about proper prep so they don’t leak. Who has the 0.040 for stock bore in stock? I found .045
02-07-2006, 08:49 AM
#11
Originally Posted by algws6
sidestep can you post an overlay between your current cam and your F13? was there any big difference between the two in power and driveability?
I would say F13 for more street use, better low-end TQ... My current cam for more drag strip use... FYI, my current is easier to drive at low rpms and idles better...
Peak numbers: F13/Current Cam... 439/419 and 450/415
02-07-2006, 09:18 AM
#13
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I'm ran .026 quench on my 6.0L block. .015 out of the hole with a .41 gasket. I know you need a little more with an aluminum block.
this time I'm going with a .040 cometic. you can 'custom' order them from cometic.com. they only take couple days to make, just give them a call. very easy to deal with. you can get many different thicknesses and almost any bore. MLS or copper.
this time I'm going with a .040 cometic. you can 'custom' order them from cometic.com. they only take couple days to make, just give them a call. very easy to deal with. you can get many different thicknesses and almost any bore. MLS or copper.
02-07-2006, 10:11 AM
#14
Originally Posted by 383ss
... you can 'custom' order them from cometic.com. they only take couple days to make, just give them a call. very easy to deal with. you can get many different thicknesses and almost any bore. MLS or copper.
02-07-2006, 12:34 PM
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I run .036 cometics on a stock short block,pistons are .008 or so out the hole. No
problems what so ever.Remember these blocks grow .010 to .012 when they warm up.
problems what so ever.Remember these blocks grow .010 to .012 when they warm up.
02-07-2006, 12:58 PM
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i'm running .045 w/35thous milled off the heads, 241s, and the F13 112+0 - no problems here.
Side Step, you got the 439/419 w/AFR 205s? those are some pretty decent numbers. I'd like to put down 405 cam only - 440 w/heads would be great.
Side Step, you got the 439/419 w/AFR 205s? those are some pretty decent numbers. I'd like to put down 405 cam only - 440 w/heads would be great.
02-07-2006, 02:00 PM
#17
Originally Posted by cyphur_traq
i'm running .045 w/35thous milled off the heads, 241s, and the F13 112+0 - no problems here.
Side Step, you got the 439/419 w/AFR 205s? those are some pretty decent numbers. I'd like to put down 405 cam only - 440 w/heads would be great.
Side Step, you got the 439/419 w/AFR 205s? those are some pretty decent numbers. I'd like to put down 405 cam only - 440 w/heads would be great.
02-07-2006, 02:27 PM
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I just swapped out my tr224 for the Mamo Cam (224-228) had the heads milled .030 and used the .040 cometics I go back to the dyno on the 9th and will keep you posted. I have only put ~20 miles on it. Ihave jumped on it a few times.... feels better but Im getting a slight amount of knock up top... I will get everything sorted out Thursday....
02-07-2006, 02:38 PM
#19
Originally Posted by MSGHUFF
I just swapped out my tr224 for the Mamo Cam (224-228) had the heads milled .030 and used the .040 cometics I go back to the dyno on the 9th and will keep you posted. I have only put ~20 miles on it. Ihave jumped on it a few times.... feels better but Im getting a slight amount of knock up top... I will get everything sorted out Thursday....
02-07-2006, 08:49 PM
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Originally Posted by z-ya
Remember these blocks grow .010 to .012 when they warm up.