hey im having a weird problem with my 07 roadster... its a 5at and when i put it in like 3rd or 4th and got wot from around 2000-2500 rpms the car bogs and stutters and stuff for about a half a second and then drives as normal.. its really annoying. the only mods on the car right now are berk test pipes and a tanabe exhaust

 

Interesting. Did this happen on your quarter mile run also?

 

it has no effect on anything besides if i crack the throttle open quickly at lower rpms.. i didnt even get to run the car with the new mods yet ive only run it stock

 

could it be something to do with the 02 sensors in the test pipes not reacting fast enough??

 

hmmm are you running stock still? when i sold my single exhaust and stuck my stock back on. i noticed when i would give it gas at low rpms without shifting mine would shutter and bog. i have berk test pipes also. but now that im back to aftermarket exhaust the problem is gone.

 

Do you hear any rasp?

 

yeh there is alot of rasp on the exhaust.. im running an aftermarket exhaust on the stock y pipe... i know its stupid but i swapped with somebody and im just waiting on my new exhaust to come... so it has to do with the stock y pipe bottling up the test pipes? this is also weird because when i was running a full turbo xs exhaust on the car it was still doing this.. im pretty stumped

 

Do you have a cel? Also try reseting the ecu and see if the problem persist. Also if you do have the cel from the test pipes. Get some oil non foulers and put some brillo pad in each of them. Stuff it in there and blow thru it each time you stuff it where you can barely blow thru it.

 

oil no foulers.. ive only seen the ones used for spark plugs... i have a cel and it usually comes on about 80-100 miles after i reset the computer... is there any write up on how to do this, ill do it today and see if it work

 

i just read infinites thread about exhaust port matching and it seems like he was most likely having the same problem as me... im gonna call up berk and get the correct gaskets on mine as well.. mine did not come with any so im pretty sure the shop used the stock ones on both sides of the test pipe

 

yeah that sounds just like the problem I had when using my stock gaskets.

 

ok so i kinda narrowed it down.. ive pretty much think i dont have a problem with my 02 sensors.. today i installed a earlier model y pipe(03-06) and it accually helped this problem go away considerably, not to mention get rid of 3/4 of the test pipe rasp haha..

i have another question.. do you guys think thats the piping size on the stillen true dual would be a good match to the berk test pipes??

 

Stillen is 2.5 so it should be good. It is the same spark plug oil non foulers. You need 2 sets. Do a search and you will find out what you need to make some.

 

ok sounds cool! what other exhausts do you guys recommend besides the stillen? im trying to find a true dual that will be a nice match for the berk test pipe to get rid of the rasp on deceleration around 2200 rpms

 

Fast Intentions sounds wicked with test pipes.

But if I had to do it all over again, I would have still purchased Nismo.

 

if you ever plan on going tt i have a fast intentions dominator for sale.

 

Whatever it is, it's NOT the tranny, 0350z33! They're just diehard!!!

 

wtf? no one even mentioned the tranny lol.

 

i accually just picked up a jic magic spartan exhaust.. i love it.. im just looking for a nice y pipe instead now.. i really like the motordyne and the jic magic.. its gonna be a tough choice! haha

 

OP, how many miles on your Z?