question on compression

[87foxstang]

I know this question has a few variables, but I am looking for a general Idea. I will be building my 408 soon It will be over the course of a year or so but still...

I am looking for nasty NA numbers, and was checking out 13.0:1 compression ratio trick flow pistons. With this compression, will I be able to run pump gas(93)

Thanks guys

 

[5spd GT]

Very unlikely...

 

[87foxstang]

thats what I thought

 

[5spd GT]

Aim for 11:1 or less for the static compression.

Then the camshaft will come into play to keep it pump gas friendly

 

[87foxstang]

cool, Ill look around for around 11.0:1 compression ratio pistons then, Thanks guys

 

[Fast63]

You could do 13:1 with a water injection setup.

 

[enyawix]

You want E85!

people are doing 10:1 and 12lbs of boost with stock timing no retard


that is the same as 18:1!

 

[87foxstang]

haha, i guess ill have to do some more research

 

[Rick 91GT]

To be safe 11:1 or under on 93 octane is where I build most street motors. WIth a 408, 6.2" or 6.25" rod you'll end up with around a 22cc dish piston with a 58cc head. Probe, Diamond and others have shelf pistons that will work....

If you need help let me know

 

[87foxstang]

cool, thanks man. If I need some guidance ill let you know