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New Spec Iron class


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08Bullitt0572

I'm thinking a 2008/9 Bullitt edition would make a great platform for this. It would give you an extra 500 RPM redline over other stock GT's and a close ratio TR3650.

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audiobuffru12

I like it, was looking at getting a mustang for $85,000 for this series ,Been looking into this beause not only can you race at NASA ,you can race at few other sanctions with same car.Looks like tis is going to be heading into a great direction.

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I'm thinking a 2008/9 Bullitt edition would make a great platform for this. It would give you an extra 500 RPM redline over other stock GT's and a close ratio TR3650.

 

Ken. I believe the Spec Iron Ford Racing allowed tune provides the same increase in rpm as the Bullitt. Also, the Bullitt 3650 transmission ratio's are the same as the regular GT. The only difference was the stock 3.73 rear gear ratio on the Bullitt (as opposed to the 3.31 of the gt.) Spec Iron FR ring and pinion is also a 3.73.

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robbodleimages

with an fr500c its not an option for me. it will be interesting to watch the effect this class has. imo its a result of the gm car guys winning their lobbying fight against the 05 and new mustang and ford racing. now cmc has shelf life on it and will be gone when the current cars age out. meanwhile it may have the same long term effect on the american iron class. the gm cars and pre 2005 mustangs will age out leaving the s197 mustangs that are built above spec iron, like mine.

 

at that point spec s197 becomes the growth class and ai is dead too.

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There are three different 5th's in the tr3650 depending on the year.62,67,74

 

Robert

 

Dont forget, can only run 3.73 ratio. I dont think any track (including Road Atl) will be using 5th gear with those 3.73's and 6500rpm limit.

But, you can choose whatever 3650 you want from the stock 05-10 3650's.. good point Robert.

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robbodleimages
There are three different 5th's in the tr3650 depending on the year.62,67,74

 

Robert

 

Dont forget, can only run 3.73 ratio. I dont think any track (including Road Atl) will be using 5th gear with those 3.73's and 6500rpm limit.

But, you can choose whatever 3650 you want from the stock 05-10 3650's.. good point Robert.

 

with a 3:73 you will need 5th at road atlanta, roebling road and vir on our schedule.

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There are three different 5th's in the tr3650 depending on the year.62,67,74

 

Robert

 

Dont forget, can only run 3.73 ratio. I dont think any track (including Road Atl) will be using 5th gear with those 3.73's and 6500rpm limit.

But, you can choose whatever 3650 you want from the stock 05-10 3650's.. good point Robert.

 

with a 3:73 you will need 5th at road atlanta, roebling road and vir on our schedule.

 

Hmm. I remember running a 3.55 and had a bunch more rpm.. Guess that 3.73 would take it over the top(?). And guess that tranny choice will be important after all.

 

And I agree that the Spec class is prob. the place to go pony car racing (unless your the super-tuner AI/AIX type.)

Great contingency, close racing, easy policing on rule compliance, simple build, with decent hp in a fun chassis.

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There are three different 5th's in the tr3650 depending on the year.62,67,74

 

Robert

 

Dont forget, can only run 3.73 ratio. I dont think any track (including Road Atl) will be using 5th gear with those 3.73's and 6500rpm limit.

But, you can choose whatever 3650 you want from the stock 05-10 3650's.. good point Robert.

 

with a 3:73 you will need 5th at road atlanta, roebling road and vir on our schedule.

 

 

yep, with a mathmatical top speed of 129 in fourth, you will easily need 5th. The would be a good option, with a shift down to 4500.

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Regionally, Top 3 Spec Iron finishing drivers are eligible for cash prizes of $250/ $100 / $50 per race with a maximum of 2 races per NASA weekend provided a minimum of 3 class cars are competing. If 2 class cars compete, there is still a payout of $100/$50 per race. For the 2013 National Championships, Top 3 Spec Iron finishing drivers will be awarded $2500/ $1500 / $750.

 

That is some pretty nice contingency especially for small car fields. Sure wish SpecE30 could get some kind of contingency like that. Time to check Autotrader for Mustang GT prices.

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From my workbook

 

TREMEC TR-3650 with Prospeed rear Gear (ratio) vs Speed (MPH) 3.38 2.00 1.32 1.00 0.74

1000.00 5.909108951 9.986394127 15.13090019 19.97278825 26.9902544

1500.00 8.863663426 14.97959119 22.69635029 29.95918238 40.4853816

2000.00 11.8182179 19.97278825 30.26180038 39.94557651 53.98050879

2500.00 14.77277238 24.96598532 37.82725048 49.93197064 67.47563599

3000.00 17.72732685 29.95918238 45.39270058 59.91836476 80.97076319

3500.00 20.68188133 34.95237944 52.95815067 69.90475889 94.46589039

4000.00 23.6364358 39.94557651 60.52360077 79.89115302 107.9610176

4500.00 26.59099028 44.93877357 68.08905087 89.87754714 121.4561448

5000.00 29.54554475 49.93197064 75.65450096 99.86394127 134.951272

5500.00 32.50009923 54.9251677 83.21995106 109.8503354 148.4463992

6000.00 35.45465371 59.91836476 90.78540115 119.8367295 161.9415264

6500.00 38.40920818 59.91836476 98.35085125 129.8231237 175.4366536

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yep, with a mathmatical top speed of 129 in fourth, you will easily need 5th. The would be a good option, with a shift down to 4500.

 

Hmm. I'm thinking with the pwr, 3350lb+, and big heavy 18" wheels and 3.73 ratio, 129 would be just about max speed at the end of R. Atlanta straight with a perfect launch out of 7 (?)

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Hmm. I'm thinking with the pwr, 3350lb+, and big heavy 18" wheels and 3.73 ratio, 129 would be just about max speed at the end of R. Atlanta straight (?)

 

 

Maybe, but if you hit it at the top of the hill you will be bouncing off the rev limiter down into the brake zone.

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Hmm. I'm thinking with the pwr, 3350lb+, and big heavy 18" wheels and 3.73 ratio, 129 would be just about max speed at the end of R. Atlanta straight (?)

 

 

Maybe, but if you hit it at the top of the hill you will be bouncing off the rev limiter down into the brake zone.

 

Maybe

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Hmm. I'm thinking with the pwr, 3350lb+, and big heavy 18" wheels and 3.73 ratio, 129 would be just about max speed at the end of R. Atlanta straight (?)

 

 

Maybe, but if you hit it at the top of the hill you will be bouncing off the rev limiter down into the brake zone.

 

Maybe

I use 5th at Rd Atl in my FR500S and I'm running a 3.73 gear. IIRC, I shift around the "black flag" stand. Car is heavy (definitely more than 3350) and I'm running the TR6060 tran (from the GT500) but I think you will need 5th at Rd Atl, Roeb, and most likely VIR even tho I haven't run my car there. 4th will be all you need everywhere else unless we add Charlotte back to the schedule.

 

From all looks of it, this is going to be an awesome class and with the backing from Ford, should definitely be a winner. It will take a little time to establish and build car counts but this has the potential to be a very strong and successful class. If I were just starting out, there is no question that this is where I'd go. Believe me, I've gone over several times in my head all I'd need to do to pull back my FR500S so I could run here but that aint gonna happen as it wouldn't be feasible. Nevertheless, I will be envious of those running in SI and will support it 100%. I look forward to being the Director and I'm very excited to know that I'm gonna play a part in the birth, success, and direction it goes. Take a look at the rules, build a Spec Iron S197, and lets get this party STARTED!!!

 

Ed

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robbodleimages

you could sell that 500s and put a spec mustangs together with the income. you dont want to keep that heavy thing anyway. right?

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Realistically, I'd say no more than 20K. Maybe a little less, maybe a little more. All depends on the level of your resourcefulness...

 

Ed

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In your best estimates, what is it going to take money wise to build from scratch a podium car?

 

 

Thinking of going back to your Mustang roots?

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