408 compression

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Sep 25, 2005 | 08:00 PM

CarolinaWS6

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From: Charlotte, NC

408 compression

ok i have a 408 iron block and im building it for boost/turbo cartek says to get the compression around 9:2:1 should i go lower than that?

Sep 25, 2005 | 09:03 PM

nitrorocket

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From: Wisconsin

Go lower, why not? Go with 8:1 if you can. There is no such thing as turbo lag with a good setup if thats what you want to know.

Sep 25, 2005 | 09:07 PM

mahhddgtp

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Depends on how much boost you want to be able to run. It sounds like it's going to be a track/speed setup... You could actually go a half-point to a full point lower if you really wanna put through some boost.. Meth always helps.

If I had money for a setup, I'd go for the street compression... 9:1 or so. You have a good bit of power down-low.

Sep 25, 2005 | 09:37 PM

CarolinaWS6

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From: Charlotte, NC

its going to be a street/strip car

Sep 25, 2005 | 10:47 PM

mahhddgtp

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Street/Strip?

I think 8.5 to 9.2 would be great.. Even if you went as low as 8.1, you wouldn't exactly have a dog low-end, since you'll have so many cubes.

Sep 26, 2005 | 12:13 AM

sagres

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I went 8.7 compression with -32 cc pistons in my 408.

Sep 26, 2005 | 10:20 AM

PurEvl

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From: South of Heaven

8:5:1 here...Na numbers in sig

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Sep 26, 2005 | 04:38 PM

JZ 97 SS 1500

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Go 8.5.....no reason for any higher. Gives you plenty of room to play with boost.

Sep 26, 2005 | 06:43 PM

#10

2000 Tran Zam

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ya, im going with 8.5 in my 408 with the gt55 turbo. what size turbo do you plan on running?

Sep 26, 2005 | 06:47 PM

#11

NA$TY-TA

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From: San Antonio, TX

Stock PCM?? What YR computer?? Id go lower then 9:1 also.....

Kyle

Sep 27, 2005 | 08:31 AM

#12

PurEvl

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From: South of Heaven

Quote:

Originally Posted by Blown408

Can you give some more information on your engine? You can PM me if you wish, but I would really like to know more. You N/A numbers look awesome for such a low compression.

Thanks in advance!

call cmotorsports and ask them to build you there outlaw 408

Sep 27, 2005 | 12:04 PM

#13

Blown408

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Quote:

Originally Posted by PurEvl

call cmotorsports and ask them to build you there outlaw 408

I am in the process of having one built right now, but I was wondering how much mine differed from yours. What heads, intake, cam and exhaust are you running?