HARROP TVS, What You Need To Know & FAQ
its really easy actually, not complex...its just like taking off the m62 but u also need to modify the map sensor a little bit
https://www.cobaltss.net/forums/show...00&postcount=5
https://www.cobaltss.net/forums/show...00&postcount=5
Last edited by RooTBeeR; Jan 21, 2010 at 08:18 PM.
i jumped right to the 2.9 and 60s.. ull be fine without meth
cant really see how to modify the map in that pic. was hoping some one had a before and after pic of the map sensor and the mounting spot. well im not a complete retard so hopefully i can just figure it out in late feb when i put my tvs on.

i actually didnt have to cut as much away, but i did end up redrilling a whole for the screw its should be pretty east to see what was cut away
My car with a shorty header... 2.5 dp and gmpp touring, makes about 20.5psi on the 3.1".. made 304hp/276 tq
3" would be better.. but it's not going to KILL it..
3" would be better.. but it's not going to KILL it..
Last edited by 383_Stroker; Feb 5, 2010 at 12:46 PM.
Valid Point 
Had i completed my thought, i would have finished the story which was that the same day, it ran exactly even up to 120-130 with a TC that dynoed 308hp .. with the cut-out closed... so, it wasn't hurting it much to be capped up..
Pretty sure i wasn't intoxicated when i posted the first one.. but i left out 3/4 of what i was gonna post
Had i completed my thought, i would have finished the story which was that the same day, it ran exactly even up to 120-130 with a TC that dynoed 308hp .. with the cut-out closed... so, it wasn't hurting it much to be capped up..
Pretty sure i wasn't intoxicated when i posted the first one.. but i left out 3/4 of what i was gonna post
I ran the 80mm on the 100% stock exhaust for a while. That setup pushed an uncomfortably high 21.3psi @ about 40F ambient. Don't know what my EGTs looked like at that point, but it felt fine. I'm sure it would be a bad idea to run it like that for too long though.
Valid Point 
Had i completed my thought, i would have finished the story which was that the same day, it ran exactly even up to 120-130 with a TC that dynoed 308hp .. with the cut-out closed... so, it wasn't hurting it much to be capped up..
Pretty sure i wasn't intoxicated when i posted the first one.. but i left out 3/4 of what i was gonna post
Had i completed my thought, i would have finished the story which was that the same day, it ran exactly even up to 120-130 with a TC that dynoed 308hp .. with the cut-out closed... so, it wasn't hurting it much to be capped up..
Pretty sure i wasn't intoxicated when i posted the first one.. but i left out 3/4 of what i was gonna post
As far as a header goes for use with a TVS would the slp header be good ? The primaries are 1 5/8 . it will be to a 3in catless downpipe 2.5 catback. But i will also have a cut out. I have dual pass option b and also the progressive ais system. ls4 tb 3in zzp intake.



haha