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Location: Montmorenci, SC
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![]() ![]() I'm getting ready to backdate my 81sc to 80ROW CIS and use the dizzy from the donor.. The engine is stock except for MSD ignition.. I had a sport muffler on my car, liked the sound, but sold it to a fellow Pelican.. What should I do to the exhaust while the engine is out?? 1. Nothing and just install another sport muffler.. 2. Backdate to SSIs, Rarly8 headers or the equivalent, and pick a muffler to go with it?? Not looking to 'rattle windows'.. I like the look of the GT3 muffler, but I can't tell if it would be too loud from the sound bites, and then there is the valence mod issue.. Or go with a 2 in 1out muffler.. The car is street driven only.. Fire away...........
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70 911T Sold ![]() 84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code |
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do you get emission tested? If not, consensus seems to be that for a stock(ish) SC, ssis are a good choice but won't give you a HUGE boost. If you are subject to emission testing, the hassle of switching out to a stock exhaust every ? years would likely outweigh the minimal gains provided.
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70 911T Sold ![]() 84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code |
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Reason I ask is that the two have different intake port sizes, and I think you'll have injector nozzle interference due to the large intake runners on the RoW and the smaller intake ports on the US heads. And BTW, I put on an early exhaust (stock HE's from pre '75) and a Bursch muffler on my '80 RoW SC and it made a very noticeable difference. Sounds good too!
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'80 RoW 911 SC non-sunroof coupe in Guards Red It's not a Carrera.... It's a Super Carrera! Last edited by Josh D; 04-15-2015 at 01:34 PM.. |
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911SC Tinkerer
Join Date: Nov 2013
Location: Jacksonville, FL
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I did the M&K 1in2out GT3 muffler and valance on my SC with a Euro Pre-muffler and Stock Heat exchangers. Sound is nice and loud but could be quieted down a bit if need bit with inserts. The look is unbeatable, but thats just my opinion.
I've done a bit of research and it seems like the dyno sheets point to a free flowing stock exhaust putting out as much power as SSI's. Debatable, for sure. The sound and feel of the car are another matter depending on which direction you take. ![]() It IS a slippery slope. Double-Black diamond slippery.
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911SC Tinkerer
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I have a supposedly Dansk 2 in 1 out I got from another pelican(it doesnt have markings) I'll give you a good price on if you decide to go that route... I decided I didn't want to cut my fiberglass bumper and then change my mind to 2 in 2 out.
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If you don't like the price tag on a set of ssi's then search for a used set of 74 and earlier heat exchangers. Thats what I did and I think I paid less than $300 for the set. Just not as pretty.
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Chris '75 911s Targa |
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Chris and Kevin, thanks for your input!! Still trying to figure out which way to go.. Put in a call to Brian at M&K, but I haven't heard from him yet....
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70 911T Sold ![]() 84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code |
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Crotchety Old Bastard
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Sorry for not returning your call, I am traveling.
The SC will benefit more from SSI 1.5" primaries than from our tuned headers with 1.63" primaries due to your exhaust port size. You will gain more from SSI and muffler with the SC than the Carrara 3.2L does due to the fuel injection systems CIS vs Motec. The 3.2L will benifit more with our larger primaries. Our dual inlet mufflers come single out for the least noise and dual out, S, R, or GT3 outlet for a more sport sound. We do have baffles or caps if you want the look with less sound. |
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70 911T Sold ![]() 84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code Last edited by Neel; 04-16-2015 at 09:33 PM.. Reason: verbage |
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Crotchety Old Bastard
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The Motronic 3.2L will benefit similarly from the SSI/muffler or OEM Exchanger/ Premuffler combo due to the primary sizing on the SSI's. The SC however benefits more from the SSI for the same reason, the primaries are sized properly for the 3.0L engine.
Muffler makes no difference as both benefit over stock. Stock muffler should be retained if you require a quiet system and/or wish to maximize torque at the expense of horsepower. This is reflected by your driving habits or how the car is used. |
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Former Options Trader !!!
Join Date: Feb 2003
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I have the same setup on my 88 as Merlinfe has on his SC. M&K 1 in 2 out GT3 Style with M&K pre muffler. Custom valance. I have the active baffles in mine. Its pretty loud, but not crazy. I am also running the Steve Wong 93 octane chip.
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Thank you all for your input and PMs.. I have decided to go with SSIs and a Dansk 2 in 2out, 70mm outlet sport muffler.. Got the muffler coming from a fellow Pelican.. Working on a 2 out valance from another Pelican.. Will purchase the SSIs from our host, unless I can find a nice used set at a reasonable price which is a 'shot in the dark' at best.. I already have the oil lines for the conversion..
Funny how you can put all kinds of stuff on other's cars and have reservations on what to do to my own car..
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70 911T Sold ![]() 84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code Last edited by Neel; 04-18-2015 at 03:25 PM.. |
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