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Fri Dec 12, 2008 6:35 am

Can Steve Tims stage 2 unwelded heads hold up with a 10.5:1 compression,and not crack?

Fri Dec 12, 2008 7:09 am

why dont you ask him?

steve is a very honest cat, him or greg ( his son i think? ) both will tell you whats up.

my personal opinion is that they should handle that and then more. to get some more replies you may want to change the title of the post.. i came here thinkin it would be a clutch topic.

maybe tims stage 2 heads.

Fri Dec 12, 2008 9:56 pm

These Tims heads hold 14 to1 so 10-1 on smaller heads should be no problem.

Fri Dec 12, 2008 9:58 pm

perrib wrote: These Tims heads hold 14 to1 so 10-1 on smaller heads should be no problem.

Which heads ae those, are they the stage 2's, i'm looking at a set for a 2110cc fair weather driver.

Fri Dec 12, 2008 10:00 pm

those are his welded race heads.

Fri Dec 12, 2008 10:11 pm

grimace007 wrote: those are his welded race heads.

Oh, Duh, i should have seen the huge welds right in front of me :D those are nice but unfortunately out of my budget.

thanks man

Sat Dec 13, 2008 12:53 am

perrib wrote: These Tims heads hold 14 to1 so 10-1 on smaller heads should be no problem.

yeah,bit I ment unwelded heads,Stage 2's which are on the special price now :)

Sat Dec 13, 2008 1:00 am

biancovw wrote:
yeah,bit I ment unwelded heads,Stage 2's which are on the special price now :)

The Stage 2's and Steve Tims' Signature race heads all start from the same casting.

Sat Dec 13, 2008 1:24 am

but welded are much stronger,or?

Sat Dec 13, 2008 1:27 am

biancovw wrote: but welded are much stronger,or?

The weld is simply to build up material above the intake port wall to allow for a larger port. It contributes very little, if at all, to the strength of the combustion chamber.

Sat Dec 13, 2008 5:43 am

I'm running 9.5:1 with Stage 2s.

Sat Dec 13, 2008 7:09 am

I meant if you can take that much out of a stock head and it remain durable the Stage Twos will be durable. Welding heads is just for being able to put the port where no aluminium was present in the stock casting.
Get the Stage Twos you won't be dissapointed.

Sat Dec 13, 2008 11:28 am

biancovw wrote: Can Steve Tims stage 2 unwelded heads hold up with a 10.5:1 compression,and not crack?

Just about ANY type 1 head will crack. It's a very common thing. The only place a type 1 head will crack is between the valves. Sometimes around the spark plug, but not as common.
People run with crack heads with no problems all the time. The only way to get a type 1 head not to crack between the valves is have the biggest valves you can put in them where the valve seats actually touch. But that not practical on most engines.

Sat Dec 13, 2008 11:43 am

craigman wrote: biancovw wrote: Can Steve Tims stage 2 unwelded heads hold up with a 10.5:1 compression,and not crack?

Just about ANY cylinder head will crack. there. fixed that one for ya

It's a very common thing. yes
The only place a type 1 head will crack is between the valves. Sometimes around the spark plug, but not as common. sure why not.
People run with crack heads with no problems all the time. yes they do, doesnt mean its ideal.

The only way to get a type 1 head not to crack between the valves is have the biggest valves you can put in them where the valve seats actually touch. But that not practical on most engines. flat out period NO FALSE WRONG ANSWER

i have put about 30k on a set of heads without cracking them and have seen heads with over 100k without cracks.

its all about how your setup and how you take care of your engine. make sure you have proper cooling, and proper warmup.

i dont know where you got your info from craig but i disagree strongly.

Sat Dec 13, 2008 1:01 pm

grimace007 wrote: why dont you ask him?

steve is a very honest cat, him or greg ( his son i think? ) both will tell you whats up.

my personal opinion is that they should handle that and then more. to get some more replies you may want to change the title of the post.. i came here thinkin it would be a clutch topic.

maybe tims stage 2 heads.

Only you would think it's a clutch topic.. :roll:

Sat Dec 13, 2008 1:15 pm

before he edited the topic all it said was stage 2 durability, way to go you got me.im a moron for thinking about a kennedy PP

Sat Dec 13, 2008 5:02 pm

biancovw wrote: Can Steve Tims stage 2 unwelded heads hold up with a 10.5:1 compression,and not crack?
Cracking is caused by overheating.
Why are you so hung up on having 10.5:1 CR? What gas are you gonna use?

Sun Dec 14, 2008 2:32 am

Bruce wrote: biancovw wrote: Can Steve Tims stage 2 unwelded heads hold up with a 10.5:1 compression,and not crack?
Cracking is caused by overheating.
Why are you so hung up on having 10.5:1 CR? What gas are you gonna use?

Out here in Europe we have 98 octane fuel.

Sun Dec 14, 2008 8:47 am

what method is your octane measured i know its different than here in the states. i cannot remember the differences offhand but im sure someone knows and will chime in with it.

the heads will handle but man that is ALOT of compression for a "fair weather" driver. im sure you could make it driveable.

but 9:1 with an engle fk-8 and those stage 2 heads from steve tims on a 2 liter make for a KILLER setup and 100% driveable

ask glenn lol
im not sure what his compression is exactly but its close to 9:1 im pretty sure.

Sun Dec 14, 2008 9:00 am

grimace007 wrote: what method is your octane measured i know its different than here in the states. i cannot remember the differences offhand but im sure someone knows and will chime in with it.

the heads will handle but man that is ALOT of compression for a "fair weather" driver. im sure you could make it driveable.

but 9:1 with an engle fk-8 and those stage 2 heads from steve tims on a 2 liter make for a KILLER setup and 100% driveable

ask glenn lol
im not sure what his compression is exactly but its close to 9:1 im pretty sure.

we have RON measurment for fuel,I think that is that.