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Author Topic:   400 with a 327 crank?
Mikey14
Member
posted October 23, 2003 12:02 PM
Ok anyone tried this?

400 block with a 327 crank. Can I use Vortech heads on a 400? I read on here this is a high rev combo.

This comes out to 347 ci. Stock bore, 349 @ .010 over and 352 @ .030 over. Our rule is 360 ci or less. Will I be able to get flat top 9:1 pistions for this at .010 and .030 over?

We race a big 1/2 mile track the exact opposite of a bull ring fair ground track. I have to use a cast iron intake and stock center dump or vortech manifolds. Will probably use a holley 4412 carb. Would 6.0 X rods or powder rods hold up with this combo turning 6500 to 6700 max? Will I find anything extra from this setup over a 355 "stock" similar setup?

BTW before someone asks here's how I figured CI: bore X bore X .7854 X stroke X 8 (cylinders) = Cubic inches.

Thanks for your help.

dirtbuster
Member
posted October 23, 2003 12:57 PM
It is a high rev motor, i just dont know whether there is any advantage to it if you are limited to 9:1 compression and will only turn 6700 max. If you were talking 7700 or 8700 then it would be different. By going to a shorter 327 crank you are giving up some torque over the 355. If you were going to put more gear in it to make up for the torque loss and turn a lot more rpm it might work, but then you are being limited by the small carb, compression, and stock manifolds.
Personally i would stick with a 355. It is an easy combo to find 'inexpensive' parts for and you wont have to spend time trying to find the right parts to make it work.


Mikey14
Member
posted October 23, 2003 01:16 PM
Thanks for the response,

I'm making an assumption I shouldn't turn stock rods that hard. Plus as restricted as this motor will be I'd think it would be hard to get the rpms up and stay there.

dode
Member
posted October 23, 2003 01:16 PM
It is a good motor, and it will run down the straights good, but it will be slow out of the corners. Really it won't be and faster than a 355, and it will cost a lot more. Stick with the 355 and you will be fine.

Oh, and be ready for a few rule changes from what I hear.

John

dirtbuster
Member
posted October 23, 2003 10:45 PM
You are right your probably pushing the limits of stock rods even with good rod bolts. Especially when you consider you can get a set of 6" aftermarket 4130 Scat rods for about 150$.


Mikey14
Member
posted October 24, 2003 12:00 PM
John!!

Man I thought I could hide on this forum! I try not to let ITP posters see me, I should know better! Maybe I should use a new login! Now you know some of the things I've been considering trying.

I'd like to know what's changing so I can start spending some time and money.



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