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Header & Exhaust group buy

4670 Views 35 Replies 10 Participants Last post by  leadfoot_mf
My car has been at Fabspeed (www.fabspeed.com) being used as a template for a new exhaust system. They already manufactor a Tubi like system that replaces the rear mufflers and increases the growl. If you look at the entire system though, you'll see there's a center resonator, infront of that a set of secondary cars (not required in the US for emissions since they are AFTER the second set of O2 sensors), and a bend in the pipe that pretty much flattens it out completely.

The new system sounds amazing and looks great. The clearances are no issue and it looks like the flattened out pipe is just the factorys way of being extremely conservative clearance wise.

Fabspeed also has a complete system from a warranty car from headers back that they've been experimenting with.

Car goes to the dyno tomorrow and after any needed tweaks, will go into production.

Rear mufflers w/SS tips: $1495

Center Resonator bypass kit (set-up still with an "x-pipe" design): $1000

Secondary CAT bypass pipes, $1890

All pieces are polished SS and drop in fitments, none of the above void warranty

All three can be used individually to tune the sound to your liking or order all three togeter and get a $300 discount or free local installation in the Philadelphia area.

If there are 5 or more people interested, there are 2 options for new headers as well (count me as #1 in line). This might or might not affect the warranty depending on your dealer and the problem since you're replacing the CAT. Car is still emissions legal and guaranteed no check engine light issues

opt 1. Take existing system, replace 600 cell count CAT with 200 cell count CAT and clean up some of the welds and bends (there's a 90 deg. bend in there!). $2000

opt 2. Complete new header with F1 style collector and 200 cell count CAT. $4000.

I will post pictures in a few days but while they have the car, wanted to see how many might be interested in headers, so if you are (or any of the other pieces), please PM me and I'll start a list for the group buy. 5 or more people upfront they'll knock 15% off the headers. 10 or more people and they'll knock 20% off

-Ron
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Thanks for the information. So basically, I pull the crimp out of the exhaust and get about 1 extra hp.
Wouldn't the dyno shop monitor cooling temp and tire temp during testing? how long is the process? westechperformance indicated a day of testing. Seems like that would be pretty harsh on the engine with no air flowing.

I would be curious to know what the specs are on the Trofero as they are at 425hp and supposedly only slightly modified from the production engines.
depending on where the measurement is taken, I would expect a 30-35% power loss at wheel. so, 10 hp at flywheel vs. 6.5 at wheel. 40-50% loss on four wheel drives. that number could be lower if it is taken on the loaded dyno's.

They use giant fans. The process lasts about 5 minutes, if your objective is max torque, hp and top speed. they basically run through all the gears. Of course the actual process is longer including the setup time. adjustments can be made depending on what you see on the curves. more $$$ though.

different ECU program and fuel, lets say 100 octane, can give you a much greater yield on hp. though, you'll never be able to go back to the regular fuel and at $10 a gallon...?? tweeks on the header, exhaust, flywheel, cooling...

again if you can corner better than the guy next to you, 10 extra hp will just be a number.
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I did my dyno test at Speednation for $75/hour. They could moniter many thing by just pluging in to the OBD port. I went to verifiy the performance of the piggyback ECU that I have and found out that it increase HP by about 15-20HP(cannot really remember the exact number) and it cost me only a few hundred dollar. This thing is pretty easy to install, just tap in and connect some wires. Since I installed it about a year ago, no problem found. Dyno result make me feel good to know that I really improve my car performance.
...the piggyback ECU that I have and found out that it increase HP by about 15-20HP...
no check engine light? I assuming you are referring to the ODB thinagamajiggie, correct?
no check engine light? I assuming you are referring to the ODB thinagamajiggie, correct?
No problem. No check engine light. What that thing do is just changing the air/fuel ratio by alter the signal to mass air flow sensor. This is done by the member of this forum who own the Viper tuner shop. I do not know that he is still on the forum or not since he had already sold his Coupe. This cost a lot less than ECU tuning and you can take it off in less than 5 minutes.
video of product

Here's quick video of the product and explanation of benefits. Car is going to the dyno next week (it's been a scheduling conflict for me), will post results when I'm back.

http://www.fabspeed.com/videos/Maserati%20Exhaust%20Explanation%20Video.wmv

If anyone has another system in the Philadelphia area you want tested back to back with this, feel free to PM me and we can run them all
Dyno results (finally!)

After a ton of delays with the dyno, slipping clutch, small scratch that caused 3 months in the body shop...I got the car on the dyno to test new set-up.

2005 Coupe Cambriocorsa, 60k miles, newer clutch, 19" BBS wheels (they were on the first dyno run too) and complete exhaust system. Fabspeed cat bypass, center xpipe and rear sport mufflers.





Open offer to give test rides in Philadelphia area...
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Thanks for posting the dyno results!

Is the whole system still $4K? To be honest, I think $4K (+ install for those that leave it to the pros) is a steep price to pay for 17 horsepower.



Thanks for posting the dyno results!

Is the whole system still $4K? To be honest, I think $4K (+ install for those that leave it to the pros) is a steep price to pay for 17 horsepower.
Yes, for full system. I really don't think it's expensive at all, especiall when compared to other offerings in the marketplace.

Top HP isn't the real benefit here, it's the new torque curve. Although there's still that strange dip around 5700 RPM, the new torque curve comes on so much stronger. Eliminating the secondary cats and the flat pipe is where this is picked up.

If you are ever in the area it's an open offer for test rides, your seat of the pants dyno will be all the convincing you need that it's a worthwhile mod.
Top HP isn't the real benefit here, it's the new torque curve. Although there's still that strange dip around 5700 RPM, the new torque curve comes on so much stronger. Eliminating the secondary cats and the flat pipe is where this is picked up.
Wow! I didn't notice the torque curve until you mentioned it. Torque is greatly improved!



Wow! I didn't notice the torque curve until you mentioned it. Torque is greatly improved!
also notice how the stock system tapers down at top RPM and with the full aftermarket system is continues to rise until redline...the car now lights up the tires in 3rd gear easily and then just doesn't stop. I used to be able to shift by feel...you could feel the car loosing some power and then know to shift up to the next gear without paying attention to the redline. Now, you have to watch the redline because it just doesn't stop pulling...
Do you have a feel for which part of the system is giving the greatest improvment for torque?



Didn't have the time to leave the car for a few days at the dyno shop to test each individual part on it's own, but I would think the biggest gain is the secondary cat bypass, which also eliminates the stock flattened pipes under the steering rack.
Wow! I didn't notice the torque curve until you mentioned it. Torque is greatly improved!
I don't know if you guys are seeing something that I don't, maybe my browser isn't loading the picture or something... I do not see a comparison of the torque curve.

The first picture I see is stock HP and Modded HP with a roughly +17hp difference in peak hp. Not bad if it was done correctly and SAE Corrected!

The second picture I see is HP and Torque for a particular run.. not sure if this is modded or without the mod. To be clear, it is not a before and after comparison of torque. It is simply a HP Curve overlayed with a Torque curve, which is the standard representation ;)

So with only 1 example of the torque visible. ( at least to me ? ) I can't see the gain. Although I'm sure there is some difference.
new pic

Sorry, linked to the wrong chart, here's the one comparing the two runs

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This one was posted above, this is a comparison of Horsepower, again not a bad gain from exhaust on a Maser, if it was SAE corrected. Did you have a comparison of torque?

Acceleration in the car follows the torque curve perfectly. It tells you alot about how the new power deliver will feel in the car ( seat of the pants ). Again we're working with a customer to provide a new ECU tune for this configuration with the belief that we may be able to squeeze more hp with nearly a full exhaust system.

Also I notice that you had your runs on different days ( which is to be expected ). Do you know if these are corrected #'s?
I don't know if you guys are seeing something that I don't, maybe my browser isn't loading the picture or something... I do not see a comparison of the torque curve.

The first picture I see is stock HP and Modded HP with a roughly +17hp difference in peak hp. Not bad if it was done correctly and SAE Corrected!

The second picture I see is HP and Torque for a particular run.. not sure if this is modded or without the mod. To be clear, it is not a before and after comparison of torque. It is simply a HP Curve overlayed with a Torque curve, which is the standard representation ;)

So with only 1 example of the torque visible. ( at least to me ? ) I can't see the gain. Although I'm sure there is some difference.
wow good catch i was believing that there was some huge gains in torque.
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