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Join Date: Aug 2011
Location: Kamloops BC Canada
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SSI or Headers?

Thinking of replacing the heat exchangers. I am not to familiar with the difference between SSI exchangers and headers.

Thanks for filling me in!

Erik
Old 10-22-2011, 08:23 PM
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Is this for a turbo setup?

If so, go with proper 930 turbo headers. SSI's aren't designed for forced induction. Sure, they can be made to work, but wouldn't be optimal for a turbo setup.

Last edited by 911TT33; 10-22-2011 at 08:52 PM..
Old 10-22-2011, 08:49 PM
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No they are just for a 911 SC 3.0 1978. I do understand you will lose heat with headers. I am just wondering if it is for performance gain, a better sound or both. I will be using it for on road use, no track.
Old 10-22-2011, 09:10 PM
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Try posting your question on the 911 tech forum. This is the turbo forum.

Your gains will be minimal on a NA motor. More noise and minimal gains than anything else.
Old 10-23-2011, 03:33 AM
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Actually, M&K makes a turbo set-up using SSIs.
Switching to SSIs and an M&K muffler on a stock SC motor offers more of a weight advantage than a power advantage.
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 10-23-2011, 04:43 AM
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SSI manufactures systems for both 911 and 930. The principal is the same as both engines benefit from equal length primaries on the low end and mid range.
Another big advantage is blow you out of the cockpit heat. SSI makes the only exchangers accepted for concourse use.

The SSI system for 930 does not come with a Y-assembly so Ben and I designed and manufactured one. Several folks here have them installed. We did this set for a fellow in CA.




The SSI system for the 911SC coupled with an M&K muffler is a real nice bump in torque over stock. Our host carries SSI, M&K and RarlyL8 products. This set was done for a local fellow on an RS clone.

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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-23-2011, 07:20 AM
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Rarly8
SSI manufactures systems for both 911 and 930. The principal is the same as both engines benefit from equal length primaries on the low end and mid range.

Howe much is power up compared too Standard piping?

Is spool reduced a lot?

Best regards/Stefan
Old 10-23-2011, 10:39 PM
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