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Originally posted by 2stangs69-91:
BTW we have done back to back(weekends not races so there could be other factors weather cond were very close) drag strip runs with a carwith 317 stroker with a S-trim AFR185 heads systemmax intake XE 274 cam. The cam was retarded at first then set straight up(dot to dot, don't need that argument again LOL)there actualy wasn't a difference in perfomance. according to the clocks.

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Originally posted by 2stangs69-91:
LOL I thought I changed it just for you guy's in one post I said as ground dot ot dot oops. on the cam degree change it wasn't my car so as far as the shift points and reving it was kind of limited to what he was willing to try. I will find out about the driveability for you. the reason I might try retarding it N/A is because I always change the cam timming just to find out if it helps. When I was racing my 69 I tried all different positions and what I have really found out is if you have a correct cam for your aplication to begin with the amount you gain from retarding or advancing your cam 4 degrees from were it is ground will give you very small if even noticeable improvments. Plus with a centrifical supercharger you are going to raise your rpm range anyhow. Wht sacrafice any low end power. I have one dyno sheet in my pic profile for a 347 N/A comp cam (I think it was the XE282)that lost tourqe and HP buy going from 4 degrees advance to straight up. It just isn't that good of a scan. If I was building my 331 supercharged engine for Max HP instead of a daily driven car that had to pass smog. I wouldn't be running most my combo LOL. I am building a 410 supercharged combo(for my 69) that I have no restrictions except cash so that will be my high HP set up.

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Originally posted by 2stangs69-91:

I like the way you always refer to blowers as bandaid's LOL they are power adders. I like the fact I can cruise my car and use it as a daily driver run smaller cams and lower compression have very good street manners have AC ,powersteering then go run 128 in the 1/4 you get the best of both worlds. N/A setups are cool but there is a reason all the top mustang clases are won buy cars with power adders they work.

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I refer to blowers as band aids because they overcome the intake restrictions an NA motor can't. You can get away with sub par parts because the blower is making the power not the motor. Your car runs hard but the hotter 347's run faster and still have A/C/power steering etc. Mayber they're not daily drivers because they're chosen not to be but I wouldn't have a problem driving my 342 daily. It's not nearly as radical as you'd think. As far as race classes go they're exactly that, race classes. You won't have power adder vs. NA cars in the same class. I'm not saying they don't work because they do. They do offer more driveability as 93Pony's turbo car literally drives like a bone stock 93 cobra. As far as smog goes, passing a sniffer and the visual are 2 different things. The guys with the hot NA stuff still get their smog taken care of

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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers

12.23 at 112.99
Best MPH 113.97