S4 and S5 TII primary ports different

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Feb 9, 2005 | 01:02 AM

R.P.M.

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S4 and S5 TII primary ports different

I had a couple irons sitting side by side and noticed that the primary ports from S4 differ from the ports in S5, both are from T2 motors.
Was anyone aware of this, cause I sure wasn't.
Which port looks like it flows better?

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S4 and S5 TII primary ports different-s4vss5.jpg

Feb 9, 2005 | 03:29 AM

HeffBoost

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Which one's which?

Feb 9, 2005 | 05:34 AM

RETed

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From: n

YES.
The S4 turbo opens 10-degrees EARLIER than the S5 turbo.
Therefore, the S4 center is better flowing.

-Ted

Feb 9, 2005 | 10:09 PM

R.P.M.

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Oh sorry, S4 on the left and S5 on the right.

Feb 10, 2005 | 12:27 AM

theflatlander

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how about the secondary ports?

Last edited by theflatlander; Feb 10, 2005 at 12:33 AM.

Feb 10, 2005 | 10:56 PM

R.P.M.

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I didn't even think to look, I will get some pics of them as well

Feb 11, 2005 | 08:18 PM

BLUE TII

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Probably just the primaries for better emissions.

Vacuum 2ndary plates will stay shut on non-dyno emmisions testing as was done at the time.

S4 and S5 TII primary ports different

S4 and S5 TII primary ports different

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