Is 10.1 to much compression for turbo and 93 octain - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 6 Old 08-29-2009, 06:04 PM Thread Starter
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Question Is 10.1 to much compression for turbo and 93 octain

I am looking at getting a turbo and was wondering if 10.1 comp. is to much for 93 octain.
Can i get a thicker headgasket or would it be ok.
The block has been decked and hardblocked 30 over weisco pistions balanced,arb rod bolts,arp head studs,main girdle,stock heads for now ,vic jr intake,holly 650,msd 6al,msd dizzy, and 2 step.
I also have a 88 stock motor that has been balanced and the pistons have be flycut for up to 2.08 valves if the other motor will not work but i would rather use the 1st motor .
I am hoping to run 6.80 to 6.90 and high 10s in quarter.

Sorry for the long post but i am really try to learn as much as possible before i get to involved because i dont want to be waisting money on the wrong parts.

Thanks L.Rowe

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post #2 of 6 Old 08-29-2009, 07:42 PM
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You can still run boost on a higher compression engine, you are just limited to how much you can run.

For example my SVT Focus... I ran 19psi on it for about 3 years with the stock 10.2 CR and 93 octane pump gas... all stock internals. Now I run lower compression (forged internals) the same amount of boost, same 93 ocyane gas... more timing and make the same power on 4psi less boost.

With Higher compression your are limited to how much boost and how much timing you can run but yes you can still do it and do it safely.... it mainly depends on how good of a tune you have.


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post #3 of 6 Old 08-29-2009, 08:14 PM
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Its all in the tune.

Good intercooler will help a lot.
Water/Meth injection is also an option.

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post #4 of 6 Old 08-29-2009, 08:17 PM Thread Starter
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Thanks guys
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post #5 of 6 Old 08-29-2009, 08:31 PM
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The cam means more in a setup like this than any other part of the engine. The static compression of 10:1 doesn't mean too much in this scenario ; the cylinder pressure while the engine is running does. A cam with a later IVC event will lower the pressure some and help you out.
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post #6 of 6 Old 08-29-2009, 10:30 PM
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The cam means more in a setup like this than any other part of the engine. The static compression of 10:1 doesn't mean too much in this scenario ; the cylinder pressure while the engine is running does. A cam with a later IVC event will lower the pressure some and help you out.
+1, my budy ran a 10:1 347 with 11psi with a vortech v2. ran it that way for a few years and this was on 91 octane. no intercooler and no meth

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