Engine Compare: S4 V.s S5 Tii

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07-01-2003, 03:01 PM

#11

Suds

Senior Member

Join Date: Oct 2002

Posts: 122

And I think they have longer and larger secondary runners, not sure. I know the third gen UIM has longer secondarys.

07-02-2003, 01:27 AM

#12

drifter

Senior Member

Join Date: Dec 2002

Location: Perth, Western Australia

Posts: 1,788

Why are you worried about the OMP?

Block it off, use premix. Just keep it plugged into the comp and you'll have no probs.

07-02-2003, 01:14 PM

#13

Racer X

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Join Date: Sep 2002

Location: Vanderhoof,BC(Canada)

Posts: 5,542

Quote:

Originally Posted by Suds' date='Jul 1 2003, 11:54 AM

Higher comp in the s5 (9.0 to 1 instead of 8.5 to 1) and a stronger rear plate. S4 engines over 400whp like to crack those rear plates. If you plan on going over 400whp get a s5 block.

Or use some bridgeported S5 plates on the S4 block.Then slap a T78 on it and hope like hell you don't pull a vosko.

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