New Exhaust System


B

barondw

GT Owner
Sep 8, 2005
1,109
A new exhaust system is very close to being offered through Ford made by Bob Ida of IdaAutomotive/Perfectpower of Morganville, NJ. www.IdaAutomotive.com or PerfectPowerUSA.com

Bob's new exhaust weighs just 10 pounds including brackets. The stock muffler with brackets weighs 60.5 pounds. It is an exhaust system not a muffler and keeps the cats. Polished stainless, 3" with these additional specs:
10 to 20+ hp over stock
coolant temp decrease of 20 degrees
polished brackets
vintage GT40 sound

This new exhaust was done to reduce operating temps for those who use their cars normally as well as tracking their cars. Mine will be the second car done after the prototype.

Dave
 
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Install

Will any Ford dealer be able to install? Please take pictures.
 
Looked at the exhaust on his site. Looks cool, but they appear to have no muffler at all. Have you heard it? How loud is it?
Thanks
 
Dave,

Metro NY is only twelve hours to Detroit. I can drive down and meet you in Detroit. I just must hear it in person first. You'll need to do atleast one long distance drive to be sure the new system works and doesn't fatigue the ears.

I know I'm asking alot but I think you might enjoy 24 hours in the GT more than just about anything. You could also check gas milage at various driving modes.

Take care,

Allan :biggrin
 
futuregt said:
Looked at the exhaust on his site. Looks cool, but they appear to have no muffler at all. Have you heard it? How loud is it?
Thanks
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It is no louder than the Borla and cruising at 60 to me just as quite as the stock unit. Re-read my post it is an exhaust system with cats not a muffler.Dave
 
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Dave, when will you have it installed? It get's hot in the summer in North Carolina and the 20 degree cooler (plus the power/ sound) would be a great benefit.
 
Very similar to Lamborghini systems which, coincidentally, have a very similar exhaust/muffler setup as the GT. The biggest gain is the weight reduction. Unless the cats are removed, I would like to see proof that it adds the power. As far as the heat is concerned...since the muffler is nothing more than a heavy steel 'oven', there is less surface area and structure heating up behind the engine, so you should see some reduction in temps. The cats are the real heat problem. Remove these, and you will see some very big reduction in engine area temps.
 
centerpunch said:
Maybe I'm dumb, but how does it reduce the coolant temp?
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We have never met so I don't know...but it increases air flow through the engine compartment which the current muffler blocks. Thus the increase air flow through the engine comparment reduces coolant temp as heat soak does not take place.

Dave
 
lthlvpr said:
Very similar to Lamborghini systems which, coincidentally, have a very similar exhaust/muffler setup as the GT. The biggest gain is the weight reduction. Unless the cats are removed, I would like to see proof that it adds the power. As far as the heat is concerned...since the muffler is nothing more than a heavy steel 'oven', there is less surface area and structure heating up behind the engine, so you should see some reduction in temps. The cats are the real heat problem. Remove these, and you will see some very big reduction in engine area temps.
Click to expand...

I would disagree with your assessment of the cats being the heat source.

Dave
 
MAD IN NC said:
Dave, when will you have it installed? It get's hot in the summer in North Carolina and the 20 degree cooler (plus the power/ sound) would be a great benefit.
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I have seen it on another GT and it does what is claimed. Bob Ida also has the complete data from dyno testing including differences in air intake temps etc. Call him if you have any questions.

His number is (732) 591-1245

Bob is one of the nicest guys you could do business with.

Dave

No I get nothing for promoting Bob and his exhaust system.
 
I would be very interested in this p[roudct. Post pics as soon as you can.!
 
Judging by some of the posts, I think some may be confused over what temps are being reduced; perhaps some clarity is necessary...

I think I know what you are referring to, but since I was not involved with the design and testing process, perhaps you can shed some light on this.

There are 'underhood/under clamshell' air temps which is impacts air temps sucked in the airbox
There are coolant/water temps that you can read on your dash gauge
There are general comparment temps when you lif the clamshell

For comparison, I removed the cats and oven box steel muffler on my Diablo and I could literally touch the heat shield over the pipes after spirited driving sessions. Before hand, I could not even get my hand within 1-2 feet of it without having to pull it away, so I could safely say the underhood air temps were significantly reduced. Never really noticed anything on the water temp gauge, but hot air out of the engine compartment is always a big plus in my book.

Just my $.02
 
All of the temps you mentioned are reduced becaue air flows through the clamshell area. Look at the post of the Canadian bumper and pics showing the rear of the car. The grill is totally blocked by the muffler, thus no air flow, no cooling results in heat soak. It you track the car or really drive it hard for extended periods the temps get way too high. Ford/SVT/GT Team all know its a real problem.

Removing the muffler and replacing it with no muffler just exhaust pipes lets the air flow better. Also you would remove 50.5 pounds from the rear of the car.

Dave
 
By removing the muffler, then it sounds like the system is primarily mandrel bent tubing with tips, similar to the Lamborghini system. Mufflers are usually what drives the prices of exhaust systems up. I wonder how much tubing it requires. What is the cost of this system? $1000-1500 range?
here is the picture of the Lamborghini system which runs about $1300, but everyone knows how much manufacturers jack up prices for Lambo and Ferrari stuff:
www.larinisystems.com/images/exhausts/DIABLO-t.jpg
 
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Price not finalized, still in prototype stage. It is similar type exhaust tubing.

BTW the link does not work, needed to manually type the link in.

Dave
 
New exhaust

I believe the website lists the cost at around $3500.00
 
here is link with information including dyno sheet:

http://www.perfectpowerusa.citymax.com/catalog/item/3095644/2628390.htm#image_1

I believe his price includes installation and dyno tuning.

Dave
 
My 2 cents, if permitted,

If you reduce the whole spaghetti in the engine compartment, of course you have better airflow and heat dissipation. Hence cooler. Hence potentially cooler airintake air, and more power (less heatsinkissues) vs a heatsunk hot engine, not vs a cool aired one though. If you eliminate the cats, also the hot gasses flow out before heating up metalcats in the engine compartment, hence cooler air in the compartment. And moreover less flowresistance, more effective power for the crank. Cats. or eliminate, or go to highflow ones. They are costly, but get less hot and have less resistance, hence more power. Looks like Ida has used those, because just with less temperature radiation alone you get not the power claimed, I reckon.
By the way, following that logic, even Bumperdelete with a meshcover instead decreases engine compartment temperature, and hence power output in hot conditions.

Sounds like a superior solution to the Borla., Probably second to the FRPP direct exhausts, who also have high flow cats, by the way, if I don't remember that wrongly. Thought I saw something thicker there around the pipes, on Piko's car.

stefan
 
New exhaust

Stefan,

Yes, you are correct. I had thought about designing my own "straight" pipes to get rid of that huge muffler box. I thought that it would be too loud, so I must study my exhaust system today and get a better understanding of it. I found a better image of this system on the link below:
http://www.perfectpowerusa.citymax.com/page/page/2032796.htm

In California, messing around with "high-flow" cats can cause the car to fail emissions testing, since there simply isn't enough resistance (back pressure) to heat the catalyst. This heated catalyst is needed to in order to pass the low speed part of the smog test. I know from bad experiences with other cars. Perhaps the GT is different. According to the Workshop Manual, each catalytic converter has it's own sensor (similar to an 02 sensor) with a real 02 sensor before it.

Now, some questions:

1. What happens to A/F ratio with this new exhaust system? Some before and after plots of that would be real nice.

2. Was anything done to the fuel map, or was the ECU left stock?

3. If the "dyno tune" was done alone, what would the HP increase have been? Was the dyno tuning actually responsible for the increase, not the exhaust system change?

4. I also have a hard time believing that there is an intake temperature decrease under actual driving conditions since there is lots of air circulating though the engine compartment, by design. Since the huge box muffler is double-walled it therefore acts a thermal insulator. Heck, I can put my hand on it after a long drive, so how can it be heating things up? The cats are always a huge source of heat! They have to be, otherwise they wouldn't be doing their job! Am I misunderstanding something here?

Dave, I am very interested in one of these setups, as it's very close to the way I would have done it! Thanks,

Jay
 
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System looks interesting. If it truly costs $3500, then I hope it uses some 100-200 cell high flow cats and offers new tip options. If it does nothing to the cats and uses the stock tips, then they may want to consider selling the system for something more reasonable. If it is just the siamesed/balanced pipes, then they may looks at constructing it using titanium with metal substrate high flow cats for more reasonable prices and it would even weigh less.

Certainly I don't want to rain on anyone's parade, and I applaud the efforts of tuners creating some options for GT owners. I am just trying to protect their interests; meaning deterring people for sending the system to a manufacturer, recreating it, and reselling it for significantly less.

Can't wait to see the product, and hear from those who have purchased it.
 
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