I just looked at you mod list, and I think OC already pointed this out, you have got a lot of intake and exhaust work with no noted tuning. Adding that exhaust was probably the straw that broke the camels back. With all those mods, your car is most definitely running lean and when that happens, there will be more detonation (which you won't hear) and the ECU will flake out and dump a lot of fuel to drop cylinder temps. In the end, you get crappy performance.

You keep saying those bends are killing your power, but don't forget those kinds of stretch bends make the pipe more oval, than round, and don't really impact the overall volume of the pipe.

Also, the lightened flywheel isn't helping things either.

 

I believe when Da Red G originally posted pic of his exhaust I mentioned the
poor quality of the pipe bends. Of course when you have pipe that is crimped
you're going to lose HP and the only way to know how much is to put the
car on a dyno before and after. Everything else is all guess work, not fact.
Our cars require 2 1/2" pipe as well as the same size in the mufflers inlet and
out let....no restrictions! The only time 3" pipe is needed would be with FI
and pushing major HP. There's a bunch of high HP/Torq cars out there using
nothing more than the 2 1/2" pipe. Company's like HKS and Magnaflow spend
hundreds of hours testing what works best, why shouldn't we believe them?
Gary

 

Motordynes new exhaust will have variation... I can't remember what all Tony has posted, so I'm not commenting on anything specific (in case he hasnt posted details yet) - other than some ideas he mentioned to me way back... it's not straight 2.5" the whole way.

 

had the car diagnosed and car is not running too lean but not too RICH... i do need a tune and thats what i been saving up for now... i just going to put the other exhaust system on the car...few months the car will be tuned with osiris...

 

btw the lightened flywheel helped a ton in tq'er feeling or better words more responsive....i notice it more probably once i put that other system on it then osiris is to come...maybe 6 months down the road ill do a forged high compression N/A build

 

very odd - unless the ECU is compensating by adding fuel - generally it pulls timing when the knock sensors detect detonation, I'm not savvy enough to know if this would cause added fuel too... its hard to understand how all the breather mods you have could result in too rich.

How was it "diagnosed"?

 

scanned wasnt running rich just wasnt running too lean to where its unsafe

 

DOESNT THE flywheel help if im not mistake isnt suppose to help the tq a lil and the throttle response??

just need to put the other exhaust on for a better exhaust flow which will help more since i did just break in my clutch n flywheel??? i need to install my ichiba header maybe even consider adding aps 2.5 testpipes instead of the 2.25 i have now.

 

Yes, it helps throttle response, but it totally neuters the car's 0 to 30mph acceleration. Lightened flywheel are ideal for cars that race on a road course where a launch and 0 to 30mph isn't crucial. A lightened flywheel makes it easier to rev match which is very important to a raod racer where chasssis balance is key. The purpose of a flywheel is to store energy. Lighten it up and you reduce the stored energy, making the car much harder to launch effectively.

 

damn it makes sense daveb i see what you mean cause when i launch it seems like to LAUNCHES HARD then evens out quickly then at WOT it kicks back in and by 2nd gear till 5th that **** is coming done the street FAST....

You think i should upgrade to 2.5 test pipes n slap the headers on it

 

Actually if your clutch is disengaged all the way, the acceleration should be better.

Lightflywheels make it harder to launch and maybe shift as there's less kinetic energy stored but other than that, you should feel it rev faster.