jmartpr

Agree 100% that the header is probably the best mod right now.....I have hold off the IPD/GT3 TB mod to see what results TPC gets with their GT3 intake system. IMO the whole package is needed (Exhaust, intake, ECU, etc) to get the results but it does get a bit expensive for the gains.....Also, a custom tune goes long way, at least that was the case with my car.

xxrockmanxneoxx

Were you able to get a base dyno...then just headers...then headers and tune?

Assuming this is with stock PSE

jmartpr

Like most cases here in RL, unfortunately no....the owner of the shop had a identical GT4 with a bit less miles and we used that as a baseline. Our first dyno was header + exhaust and then we did another dyno session for the custom COBB tune. I know it's not the optimum to gauge gains but didn't had the time to go back a forth to do before /after runs. For some strange reason my car was very lean with the exhaust mods, made more power than a stock GT4 but not the expected results, specially at the higher RPMSs.....we were able to fix it with the COBB AP and gain a considerable amount of power.


BTW...my car also has an exhaust system besides sport headers.

xxrockmanxneoxx

So tune is a must with the headers. Just headers alone car runs not to par.

jmartpr

Sport headers alone are Ok but you could refine and gain a bit more power with a Tune....for Race headers I would say that a Tune is a must.

ShakeNBake

Wouldn't the car go into limp mode without a tune?

xxrockmanxneoxx

Yeah i plan to go with Race if i do.

jmartpr

Not with Sport headers....the race are a different story. You could use a mini-cat to fool the ECU but you would be leaving a lot on the table due to the increase flow and with a tune you also get rid of the CELs.

BRNGT4

I ran my race headers with no tune and got no cels.. this included two track events and several 100 street miles. Could be that the ecu mapping we get over in the middle east is diff from the us ones?

martinporter

Noob question - are the group buys for US based people only?

supercup

I also have sport headers with no tune and have had no issues at all, other than people telling me how great is sounds!

RaceDevelopementCenter

MArtin ,
Shoot me a pm with your email and I'd be happy to help . I can provide you with a great deal on the headers or I'd reach out to our amigo John Tecce @ BGB

DC640

Does the ecu adapt over time? Getting mine installed this week...

CAlexio

Call Cobb on phone.. they figured out a backdoor to 981 ecu.. don't ask, just call them and they'll explain.

DC640

oh?? i dont know what that means but sounds like i need to open up my wallet now