Total OD with a 10% pulley is supposed to work out to 12-13%. That's too much for a double intercooler to handle.
That statement is untrue. I was running 10% OD on a late model blower, then 15% OD on an MPx all thru a double intercooler with a fan. There are plenty of people running 10%+ OD on a double intercooler with no problems. If built correctly they can be truely effective.
On the 94/5 SC's running more than a stock 89 pulley will result in the knock sensor pulling all timing out and therefore no power increase. If you have a non-functional knock sensor then you can make more power but you will be flirting with detonation on a continual basis.
In the old days no one offered a chip for the 94/5's mainly because they did not understand why they would not respond to tuning changes. We now know why. The 94/5's have a better supercharger capable of more boost combined with higher compression, a different camshaft, and a more restrictive exhaust. These things combine to make the 94/5 SC non-responsive to pulley/chip changes. Even with an opened up exhaust and double IC we found that going from an 89 pulley to a 5% resulted in more torque at low rpm but no more power in the higher ranges due to the knock sensor pulling timing out very aggressively.
Upgrading the exhaust is a good place to start but don't go too far and make the car loud and obnoxious. This is one case where a little is good and a lot isn't any better.
I dont know if you have inspection there or not, heres a clip of mine, no cats 3in mid section and borla's. Naturally the more power, the more noise. A stock sc with this setup might be a bit quiter. I think my setup is good enough for a decent ammout of power, a big improvement over stock thats for sure.
http://videos.streetfire.net/video/thunderbird-sc-exhaust_206655.htm
Corey
wow that sound pretty damn good! imo
whats all done to this exhaust! i picked up no cats 3in mid section and borlas
whats the spec
piping size
and all thanks
It seems like the coating flaking off at high rpms isnt consistant. Ive been driving for awhile at 10% OD and I saw caseys blower with even more OD than me and his coating was fine also. Maybe yours were getting hotter because of the stock IC?
Corey
wow that sound pretty damn good! imo
whats all done to this exhaust! i picked up no cats 3in mid section and borlas
whats the spec
piping size
and all thanks
wow, I guess Im having good luck, I think theres over 150k on this late model Im using. The snout hasnt been touched either. I guess Im waiting for it to kill itself so I can put something nifty in its place
Corey