Engine Compare: S4 V.s S5 Tii

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Jul 1, 2003 | 03:01 PM

#11

Suds

Senior Member

Joined: 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.

Jul 2, 2003 | 01:27 AM

#12

drifter

Senior Member

Joined: Dec 2002

Posts: 1,788

From: Perth, Western Australia

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.

Jul 2, 2003 | 01:14 PM

#13

Racer X

Senior Member

Joined: Sep 2002

Posts: 5,542

From: Vanderhoof,BC(Canada)

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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