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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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4k would be more then ordering the Euro headers and a set of cat bypasses from the guys in germany...and I doubt you would get more flow

but with the discount that would be pretty good...can they fab up some test pipes that run from header to resonator? my resonator and back boxes are already replaced but I need something up front any shots of the unit?
 

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Any Updates on this? Pictures?

I would like to remove the crimp and replace the 2nd set of cats with a bypass.

Please let us know about dyno results. I dont want to loose torque in the process.
 

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Discussion Starter #5
Video & Sound clips

Here's the link to the video's of different Fabspeed combinations installed on 2005 Coupe Cambriocorsa.

http://www.youtube.com/watch?v=4ntYvqp3MAI

Full open system (cat bypass, center resonater delete, straight pipes out the back) is LOUD. Personally I love the sound and the "burble" you get on downshifts but most will probably want a rear muffler to keep it a little quieter for day to day/ around town driving.

Full Muffler system (cat bypass, center resonator delete, rear performance mufflers). Sounds a little louder under throttle than a Ferrari with Tubi's, def. sounds better than a friends GS with aftermarket Tubi system. Quiet enough under part throttle for around town driving removing some of the trademark V8 growl, but still screams like a sports car top end.

With the mid-cat bypass pipes there have been no check engine light issues (the 2nd cats are behind the O2 sensors), no loss of torque (seat of pants makes it feel like a little more above 4k) and then there's the overall weight savings to factor in too.

Working on Dyno charts. Car was so down on power on the dyno stock, I'm working with the dealer to try and troubleshoot it (321 max after 4 pulls) and A/F ratio's ranging from 14.1:1 - 11.0:1 between different runs. Hope to have it sorted out in a few days to show more accurate before/after charts
 

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i bet the number will be significant even with just the bypass installed. who in the right mind would design such a setup...perhaps, it was a quick and dirty detune :D

price?
Preliminary pricing:
Rear mufflers w/SS tips: $1495
Center Resonator bypass X-Pipe: $1000
Secondary CAT bypass pipes: $1890

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

I'm trying to get a side pic of the cat pipes, it looks like someone rode over them with the car and completely flattened them out!
 

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To see the dyno is the best. I do not think that we will gain a lot form changing from the flat pipe to the round pipe(bypass the cat is another story). I know that the Trofeo race car also use that flattened pipe. From the pic, you could see that the flat pipe is actually bigger than the other pipe section. So when it was flattened, the cross section area for the exhaust flow is roughly the same as the other pipe section. If I want to do anything, maybe just cut the main cats out and put pipe instead. This will cost a lot less.
 

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To see the dyno is the best. I do not think that we will gain a lot form changing from the flat pipe to the round pipe(bypass the cat is another story). I know that the Trofeo race car also use that flattened pipe. From the pic, you could see that the flat pipe is actually bigger than the other pipe section. So when it was flattened, the cross section area for the exhaust flow is roughly the same as the other pipe section. If I want to do anything, maybe just cut the main cats out and put pipe instead. This will cost a lot less.
while the crushed area may be larger it will still impede flow due to the shap change in the piping will also mess up exaust gas velocity and create an eddying around the edges as more gases than can exit through said space hit the walls around the narrowed opening....Mille if you want people to buy in to this stuff responding may be helpful
 

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while the crushed area may be larger it will still impede flow due to the shap change in the piping will also mess up exaust gas velocity and create an eddying around the edges as more gases than can exit through said space hit the walls around the narrowed opening....Mille if you want people to buy in to this stuff responding may be helpful
Thanks for the info. I also think that the round pipe is better but my point is how much better. Is it worth the money? I really wanna see the dyno chart. This will help a lot of us make the decision.
 

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It seems like the ever elusive dyno #s never seems to appear to back
the product.

What is the cost to run a dyno test? Is it safe to do so? I would think you would need to go to someone very familiar with the maserati engine right?

I have seen some tests on utube where the motor "pops" but those were heavily modified cars.

If it is a matter of reving the motor for a moment or two to the redline, I'll just do it myself.
 

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...What is the cost to run a dyno test? Is it safe to do so?
I had mine dyno'd a couple of times now. I would assume those engine block explosions are likely caused by chargers. If I remember correctly, i paid $75 @ D2 in Gardena.

I would think you would need to go to someone very familiar with the maserati engine right?
rather tunning experts would do need not a maserati specific specialist.

Engine has to be pushed just right for the test to be accurate.
 

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I had mine dyno'd a couple of times now. I would assume those engine block explosions are likely caused by chargers. If I remember correctly, i paid $75 @ D2 in Gardena.
rather tunning experts would do need not a maserati specific specialist.
Engine has to be pushed just right for the test to be accurate.
I can't believe you just said $75.00
Thats all that it takes to validate a performance product and I have yet to see anything either on this board or the well known ferrari boards. Thats kind of funny. There are page long debates about backpressure, hp, torque etc from exhaust mods all of which can be resolved with about $200. of testing

Well, I have to ask: Have you had your car dyno tested after any modifications to exhaust?

I'd like to find someone to test my car in the west la area if possible. If anyone knows of a good shop, I'll do it, and again after any mods to the exhaust. I know FX performance may be a starting point, but I think they
are now into general repair.

Also, I had some tire damage this past week from a pothole, so while they had my car up on the rack, I took a good look at that bend in the pipe.
Its pretty flat. Almost looks like its crimped.
 

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i think it was $75...even if it was $150 I would still do it :D And i just remembered the name wasn't D2 (that's a BMW tuneshop).

It depends on what kind of dyno testing you want to do. Some things to consider:

-On newer cars both sets of wheels are being monitored by the PCM/ECU, so both pairs need to be rotating at the same rates.
-Be very careful of inadequate cooling of the engines and tires during testing.

If you are looking at just getting peak torque and HP numbers on a non-load bearing Dynojet, you can call R&D Dyno in Gardena. Their phone number is 310-516-1003. The owners name is Darin. His address is 115 East Gardena Blvd. (which is east of the 110 freeway) in Gardena. Non-load dynos tend to inflate their numbers over load dynos.

If you are looking at doing load testing and duration testing you need to contact Westech in Mira Loma their web site is www.westechperformance.com. They both specialize in dyno tuning and diagnostics and own a true load bearing dyno from Mustang. This is a two wheel dyno. Contacts at Westech are Rick Stoner or John Baechtel at 909-685-4767. Their address is 11098 Ventura Drive , unit C in Mira Loma CA 91752.

as far as west la goes...there is one in culver city near robertson...though I wouldn't go back again.

now, about my dyno results... R&D did the before, too lazy to go back I went to the "culver" one for the after. since the two tests were done on completely different machines, they were then inconclusive. went back to R&D after the Eurotek ECU mod and the number was about the same as the before...like 5 bhp more or something. after the ECU disasters I never did any mods again. there is only so much they can do and they make you believe the mods can turn these babies into rockets (only if they are rocket scientists). turbo and super chargers are different story though, an entire diff. realm of mods. focus on suspension and weight than getting more torque or bhp. unless you mod the entire engine compartment there is very little gain you can get for 5-10K.

hopefully Eurodino can hook me up with his rocket scientist friends one of these days :D
 

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now, about my dyno results... R&D did the before, too lazy to go back I went to the "culver" one for the after. since the two tests were done on completely different machines, they were then inconclusive. went back to R&D after the Eurotek ECU mod and the number was about the same as the before...like 5 bhp more or something. after the ECU disasters I never did any mods again. there is only so much they can do and they make you believe the mods can turn these babies into rockets (only if they are rocket scientists). turbo and super chargers are different story though, an entire diff. realm of mods. focus on suspension and weight than getting more torque or bhp. unless you mod the entire engine compartment there is very little gain you can get for 5-10K.

hopefully Eurodino can hook me up with his rocket scientist friends one of these days :D
We use Cryo's as fuel.:) I don't think anything with wheels will survive... Mach 15 :D :D
 

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i think it was $75...even if it was $150 I would still do it :D And i just remembered the name wasn't D2 (that's a BMW tuneshop).

It depends on what kind of dyno testing you want to do. Some things to consider:

-On newer cars both sets of wheels are being monitored by the PCM/ECU, so both pairs need to be rotating at the same rates.
-Be very careful of inadequate cooling of the engines and tires during testing.

If you are looking at just getting peak torque and HP numbers on a non-load bearing Dynojet, you can call R&D Dyno in Gardena. Their phone number is 310-516-1003. The owners name is Darin. His address is 115 East Gardena Blvd. (which is east of the 110 freeway) in Gardena. Non-load dynos tend to inflate their numbers over load dynos.

If you are looking at doing load testing and duration testing you need to contact Westech in Mira Loma their web site is www.westechperformance.com. They both specialize in dyno tuning and diagnostics and own a true load bearing dyno from Mustang. This is a two wheel dyno. Contacts at Westech are Rick Stoner or John Baechtel at 909-685-4767. Their address is 11098 Ventura Drive , unit C in Mira Loma CA 91752.

as far as west la goes...there is one in culver city near robertson...though I wouldn't go back again.

now, about my dyno results... R&D did the before, too lazy to go back I went to the "culver" one for the after. since the two tests were done on completely different machines, they were then inconclusive. went back to R&D after the Eurotek ECU mod and the number was about the same as the before...like 5 bhp more or something. after the ECU disasters I never did any mods again. there is only so much they can do and they make you believe the mods can turn these babies into rockets (only if they are rocket scientists). turbo and super chargers are different story though, an entire diff. realm of mods. focus on suspension and weight than getting more torque or bhp. unless you mod the entire engine compartment there is very little gain you can get for 5-10K.

hopefully Eurodino can hook me up with his rocket scientist friends one of these days :D

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.
 
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