Build The Ultimate GT350

[VoodooBoss]

You missing the point of this thread.

Sounds like the GT3 RS drivers need to improve their skill.

 

[Drlee50]

I get the point but for hpde, I have never seen randy p show up to any of my events. The times you see the pros get in a gt3rs etc are the absolute best possible for conditions that day. Most Porsche drivers are not that skilled . they may have the car but that's about it. I'm a far better driver and I pass them far more them I get passed. So really, the mustang is very capable. I recently sold my gen 2 twin turbo viper track car and I'm just as fast in the boss 302. You drive it differently, but it can be surprisingly fast. It needs weight reduction for sure. But the cost eventually is too much. And if you are leaving time on the table because of the driver skills, thats where you need to invest .

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[Bill Pemberton]

I just step out of my GT 350 ----bingo 175 lb loss immediately!!

 

[302BOB]

Bill you gotta get cloned so you can lose 350lbs when you both step out...

 

[Bill Pemberton]

I will get it down a bit using Summer air in the tires.

Weight is such a strong avenue to get speed out of a car. The old rule of thumb that 100 lbs dropped is worth a second on a 2 mile track, gives one the idea why getting the car thin makes a ton of sense!!

 

[JAJ]

I get the point but for hpde, I have never seen randy p show up to any of my events. The times you see the pros get in a gt3rs etc are the absolute best possible for conditions that day. Most Porsche drivers are not that skilled . they may have the car but that's about it. I'm a far better driver and I pass them far more them I get passed. So really, the mustang is very capable. I recently sold my gen 2 twin turbo viper track car and I'm just as fast in the boss 302. You drive it differently, but it can be surprisingly fast. It needs weight reduction for sure. But the cost eventually is too much. And if you are leaving time on the table because of the driver skills, thats where you need to invest .

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I agree! The driver upgrade is often overlooked and very powerful. The experience I had that hammered that home was back in 2008 when I showed up at a BMW club HPDE with a brand-new E92 V8 M3. It was still breaking in so the rev limit was 5500RPM, and it was on stock PS2's with stock brake pads. My instructor that day was a professional endurance racer. She'd heard about the new M3 and wanted to try one out, so I handed her my keys and climbed in the passenger seat. She headed out onto the short and very technical track with the Advanced run group. It was a surreal experience. While we chatted calmly about the new car, she proceeded to overtake and pass EVERY OTHER CAR in the Advanced run group except for one. It was fascinating because she did it without going over 5500RPM and without a hint of smelly brakes. It really drove home the importance of balance, momentum and rhythm.

Here's a shot of Mel in her office in 2003:

 

[302BOB]

A happy car is a fast car..Do all you can to make that car smile! Weight reduction, handling, driver ability & Mods will all filter in to a better lap time....and one more little thing....luck....If I forgot anything I'm sure I'll hear about it.

 

[Bill Pemberton]

Ok Bob , time to hear about it ......................................tires , tires , tires. Other than Driver training best mod to go fast!

 

[302BOB]

A sticky tire is your best friend in a corner.....believe me, I know!

 

[VoodooBoss]

Back on topic how do we get that extra 25 HP? Will exhaust mods and tune do it? Remember gotta keep it street legal.

 

[8250RPM]

2 years ago I prototyped the headers and exhaust system for American Racing Headers for the GT350.

My 100% bone stock dyno pull at watson racing
Was 454.19 rwhp on 93 octane. (Stock tune, stock CAI, stock air filter, stock oils, tires, etc 171 miles on the car)

With ARH long tubes, catless x pipe (stock mufflers, stock tune, stock CAI, stock air filter, stock oils, tires, etc, 180 miles on the car, same tank of 93 octane)
I pulled 484.80 rwhp. I gained 30 rwhp.

With ARH long tubes, catless x pipe, Lund 93 octane tune same day dyno pulls I pulled 511 rwhp.

Same set up as above but now with a Lund 100 octane tune and Sunoco 260GT 100 octane race gas I pulled 536 rwhp.

I tried a JLT CAI and gained exactly 1 rwhp.
So I took it off and kept the stock CAI because I liked the fit and finish better and also prefer the ford performance oil catch can mounting.

Again all this was on the same watson dyno, 2 years ago, less then 220 miles on the car.

Easy 81 rwhp gain is damn impressive if you ask me with just headers, tune and fuel!!

Since then I considered a dry sump oil system because 2 years ago I tried installing the cobra jet intake but quickly noticed it doesn't fit and the engine can not be lowered more than 1/2". To make the cobra jet intake fit under the stock hood the engine would need to be lowered 1.5". A dry oil system would allow this and provide a superior oiling system. But for the small increase in performance the CJ intake gives it's not wort it.

I also contacted Hogan intakes to have a aluminum fabricated intake made but since then I put it all on hold. I really wish ford performance would of kept their word and released the 92 and 100mm throttle bodies. I'd love to be the Guinea pig FP if you're reading this.


But to answer your question, a tune and fuel will add 25rwhp easy.

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[VoodooBoss]

Good info. Your numbers are impressive.

So keeping it street legal means keeping the cats so cleaning up the exhaust from the cats back and a tune should do it.

 

[8250RPM]

Good info. Your numbers are impressive.

So keeping it street legal means keeping the cats so cleaning up the exhaust from the cats back and a tune should do it.

When I prototyped the headers for nick at ARH
(They are in New York I'm in Michigan) they later got a local customer to donate a gt350 and dyno tested that customers car with ARH headers, with and without cats, with their own mufflers and the results were near identical.
According to Nick, the cats only cost 1 rwhp.
The mufflers did not add or decrease hp. The only thing about the ARH mufflers are they are not dual mode. ARH uses their own module to keep all the mode selections for suspension, track, sport etc.


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[SDS]

When I prototyped the headers for nick at ARH
(They are in New York I'm in Michigan) they later got a local customer to donate a gt350 and dyno tested that customers car with ARH headers, with and without cats, with their own mufflers and the results were near identical.
According to Nick, the cats only cost 1 rwhp.
The mufflers did not add or decrease hp. The only thing about the ARH mufflers are they are not dual mode. ARH uses their own module to keep all the mode selections for suspension, track, sport etc.


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Good info. Your numbers are impressive.

So keeping it street legal means keeping the cats so cleaning up the exhaust from the cats back and a tune should do it.

Unfortunately California owners don't have the option to stay street legal with non stock CAIs, long tube headers, changing intakes, throttle bodies or messing with a tune....or we have to change everything back to stock when it's time for the CARB police to check our cars.

Steve

 

[8250RPM]

Unfortunately California owners don't have the option to stay street legal with non stock CAIs, long tube headers, changing intakes, throttle bodies or messing with a tune....or we have to change everything back to stock when it's time for the CARB police to check our cars.

Steve

As I said. DO NOT BUY A Aftermarket CAI. The stock one is perfect.
The highest octane gas you can get is going to add 12-20 hp depending on octane rating.

A tune can be swapped back to stock in no time.

Fuel and tune will add an easy 30+ rwhp.


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[VoodooBoss]

All we need is 550 HP at the crank and Ford should easily be able to do that.

 

[8250RPM]

All we need is 550 HP at the crank and Ford should easily be able to do that.

The price of a Ngauge and tune will easily add 20+ hp.

Race fuel or Torco octane booster will add power.


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[302 Hi Pro]

Look at the Kooks headers with catted X-Pipe. They advertise a 50 State certified (catalytic converters), exhaust system.

American Racing Headers and Kooks Exhaust Systems both make great products.

PS: If you go with new exhaust headers, I would recommend a good Silver Ceramic coating. Installed a set of Kooks headers & they still look new after 2 years & 10k miles.

 

[BigTaco]

Kooks sells 49 state legal...

 

[Bill Pemberton]

Believe Big Taco is correct , though VoodooBoss can possibly verify -- don't think they have passed CARB ( California Air Resources Board). California is tough to push things through and often the cost associated with an approval means a lot of After Market Companies just don't even try to get certified.