TTC mod and hitting fuel cut

[little num]

hi guys / gals, ive recently bought a uk spec totally stock car (still with cats in) i had a some hesitations so my brother and i decided to by pass the vsv's by doing the TTC mod, this made the car very quick but was still hesitating really bad, i then changed the spark plugs and would you guess problem solved.

but we left the TTC mod and went to try the new plugs, first - second - third was brill but forth - fifth - six i seemed to be hitting the standerd fuel cut is this normal, it was hitting 1.1bar, when i put it back to normal i was only hitting 0.9.

your feedback would be a help cheers

[Wez]

1.1bar with both cats in will generate some high EGT.

 

Now you have fixed the prob why dont you go back to sequential mode

[little num]

1.1bar with both cats in will generate some high EGT.

 

Now you have fixed the prob why dont you go back to sequential mode

 

yeh we have, we only did the TTC mod to make sure it wasent a vsv causing the problems, im after a first decat and second decat pipe ready for me to go BPU, just my brother was a bit suprised with the car as its stock and we hit fuel cut, he seems to think it shouldent boost that much.

[jaymdee]

I think that TTC can lead to a boost spike which you don't get from normal sequential mode, as all the boost is coming in at once and overwhelms the wastegate, rather than being controlled properly. I expect that the boost would drop back down, but you've already boost cut when it goes over 1.0Bar