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99+ mustang horsepower


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I've only recently learned of this series, so please forgive me for the beginner question. I was looking through the rules, and I'm kind of confused about the max horsepower allowed.

 

first, i presume that "adjusted maximum rear wheel" horsepower just means rear wheel horsepower, and not crank horsepower. if i'm wrong, please let me know.

 

but if i'm right, and since the max rwhp allowed is 230, does this mean that any 99+ mustang gt will have to use a throttle body restrictor plate?

 

thanks for putting up with my newbie question. any help would be appreciated.

 

Rob

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Rob,

That is correct, 230 HP at the rear wheels,and the late model cars are running restrictor plates to adjust down to the 230HP and 300 Torque.

Tony

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well i think i'm just going to take the 2nd part of the answer, because the 1st part doesn't seem to correlate.

 

you say that it's 230 rwhp, AND that the late models need to use a restrictor plate. but if it's 230 rwhp (and not crank hp) then you wouldn't need to use a restrictor plate, since 260 crank equals about 221 rwhp.

 

i think i got it though. 230 rwhp "adjusted" with the standard 15% loss, right?

 

regardless of all that confusion, bottom line is to get a 79-98 because the 99 would be a waste of money since you don't get the benefits of the extra power, right?

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Rob,

 

We measure our rear wheel hp and torque on a Dynojet dyno, then bring our dyno sheet with us to the races. Not sure what the newer model Mustangs are doing in the hp/tq dept. I am not a Ford gal so I'll let the Blue Oval crew address that issue. I think the newer Mustangs are maybe more aerodynamic, that may be an advantage over the boxier earlier models. The older ones are cheaper and more plentiful and would probably be better first race cars if you are a beginner. An even better approach would be to buy a CMC car that is already sorted out.

 

Our series is a budget-minded one with the intent of everyone being able, on a reasonable budget, to build a competitive car. It is not that hard to reach 230hp and 300ftlbs torque with stock motors of the years of Mustangs and Camaros (F-bodies) allowed.

We are allowed relatively few modifications to keep our costs down and the competition focused on the driver, not the car/wallet.

 

If you are in Northern CA please come out to one of our events and we will be glad to show you our cars and tell you more about the CMC series.

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Rob,

Forget the 96-99 Mustang with the 4.6 its a dog, stay with a 5.0 car as in the 94/95 Mustangs.

As for the restrictor plate I was talking about the late model Z-28 camaros with the 5.7 litre.

You can download the rules right here on our website and you can read what i'm talking about.

Julie is right, come out to the track and you will learn a ton about our cars and the different set ups.

thanks,

Tony

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ok, so since the restrictor plate is only for the camaros, what do 1999-2002 mustangs that come stock with 260+ crank horsepower have to do to be able to compete?

 

p.s. i was only using the 96-98 mustangs with the early 4.6 as an example of what's allowed. i would never consider buying one.

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Use a restritor plate as it is NOT only for the Camaros.I dont think a 1999 Mustang would be over the rear wheel 230 Hp Dyno anyway.They usually come in at 210 stock.

The rules will spell it out,but you can be a little over on the HP/torque,but then you must add weight as per the rules.

Tony

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So my question is can I use a Chevy restrictor plate on my Ford? Does this affect the horsepower? And at which rear wheel is the horsepower measured? I have a limited slip so maybe the horsepower is only 230 at one wheel (which would be legal) and 300 at the other (but this wouldn't matter would it if I only counted the one wheel with 230)? But what would happen if I locked up the rear end? Oh, and can I run my 2001 Cobra that I run in SCCA ITE? As we all know from Ford, they never tell lyou the real horsepower on these and this doesn't really feel like much more than 230 hp at the rear wheels (of course, this is the "adjusted" hp to calculate for around 75% drivetrain loss). And is Britney really going to be the race queen at the CMC races at Sears Point October 12/13 or did she already break up with Don Campbell?

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so it is just 230 rear wheel horsepower then. i don't know why the call it "adjusted rear wheel" horsepower then. the only adjustment you have to make from a dyno is to attain estimated crank horsepower using the standard 15% loss method. results from a dyno are just "rear wheel horsepower"

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i read the friggin rules. and the rules is what caused my question. and it basically got answered.

 

but another still remains. why call it "adjusted" rear wheel horsepower when it's just rear wheel horsepower? you only have to "adjust" to achieve crank horsepower.

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I would speculate that it is called "adjusted" to adjust for the testing conditions so that everyone's readings are with respect to the same baseline.

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OK, so it's correct that adjusted is corrected and should be corrected from adjusted to corrected in the rules...is that correct or should I adjust my perception? But how does this affect torque?

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