lost out on a local tvs deal, now i have the doe to buy new from ottp. Here's my issue, i will not be running meth. Ive never been in a 300 to 320hp cobalt. That is the rang i want to be in. Can this be done on the ottp canned tune with the 2.9 n just a s3 h/e n zzp dual pass endplate. I dd this car, never go to track just like to do few pulls here n there whyll pickn up groceries. Is this a bad idea? I was hopen since the tvs doesnt heat up like the m62 with small pulleys that the 2.9 would be ok for what i use it for. The ottp tune is my only option till spring. I allready have vibrant header catless downpipe and 2.5 exhaust with dynomax turbo muffler. I would like real numbers from guys who drive these as dd with just these cooling mods and no e85. Thanks guys

 

good luck getting one from them lol

 

TVS is perfectly DDable. I did it on stock exhaust, 60s, intake, dual pass, opt. b, and FMHE. That was with the 3.1" pulley, and I was hitting ~21.5psi (not good, too much).

I "only" made 278whp/255ft-lbs on the 3.1" pulley, 93 octane, full 3" exhaust, 18psi, and a dead h/e pump. Despite what a lot of people say, that is a very realistic number for that setup on regular pump gas.

You should definitely surpass 300whp with a 2.9, 93+ octane, and no meth, but probably not on the canned tune.

If you can't afford a custom tune, the canned one should get you from point A to point B, but you should really focus on setting some cash aside for a real tune.

 

pyro was it a noticable diff from a m62 to a tvs if you were only puttn down 270ish at first. I run a 2.7 setup no meth tho n it pulls rather good, but in retrospect ill only be gaining 40hp mabe for 2000ish dollers. you made that power on 3.xx pulley, i would like to know if i could go str8 to the 2.9 with just h/e n dualpass n be lil over 300. wish i could ride in a 300whp cobalt first. Ive been in far nastier v8 cars just would like to know that a 2.9 car has first.

 

i went from a 2.6 pulley on a stock s/c with meth and all supporting mods on 93 oct. to a tvs with 80lbs injectors and a 2.8 pulley on 93 oct with no meth and i can feel a very nice diff. on the old setup i dynoed around 280ish and 260 tq. i think it was worth the money for the tvs kit and gives you more room to work with down the road. i want to take my car to get tuned after i get my springs and retainers installed. i want to hit around 360 on e-85

 

so ur on a 2.8, do u have a interceptor to set iats? Are the cooling mods i have the same as urs or do u have more or less? Thanks for ur more in depth response this time. It does help. I plan on going str8 to 2.9 but if youve had good luck with the 2.8 on pump gas i may try aswell. What tune were u on for the 2.8 on pump gas? I have funds for custom tune but do to work i cant travel anywere to a GOOD tuner till im able to take a few days or even a week or two off from work.

 

i havent seen my iats go above 130 on a pull all the way thru 4th gear, but it has been cold as hell here. it does fine on a 2.8 and im on a can tune from ottp right now. but when ur looking for hp canned tunes arnt ****. i had an ottp can tune when i first got the 2.6 on the stock blower and i was only in the 230's. when they dyno tuned it i was then in the 280's. but we basically have the same cooling mods except i dont use meth anymore (for now) and my heat exchanger isnt an s3, its alittle smaller.

 

are the boost levels that are created by the 2.8 considerd safe for the lsj? Also sounds like ur prob somewhat above the 300mark but held back from the ottp canned tune. Do you know what ur afr's are at wot. As long as he can keep me in the 11's n a safe timming rang idc much bot max power outa this thing rite now. Lookn more to not putn more money into the m62. Man ima miss my whine tho for all the tvs cars i hear are very quiet, mabe be diff with the 2.8 tho

 

You will like how the power of the TVS is, def. different from what the m62 is. The more cooling mods the better, meth isn't needed for a 2.9, I would recommend a option b kit as well if I were you. I pulled 312whp on a 2.9, so you should be able to get your goal with a good tune.

Only thing I didn't like was intake temps being so high during summer... now I am going turbo... but it was a personal choice I made, I gotta say though I have no regrets doing what I did with the TVS, including bolting on a 2.5 pulley and cranking out 27psi out of the harrop, that was awesome.

 

I was GMS3 with the 2.99 pulley before the TVS, so yes it was noticeable.

I went from 245whp, to 278whp (same dyno), to probably 300+ now according to the butt dyno and quick races with buddies, although I haven't gotten numbers for my current setup.

The main thing you'll notice is that it doesn't take off as violently anymore, and really blasts off once you hit the upper rpms. This is good for axles and traction, so both good things in my book.

 

i agree with pyro my tvs feels completely different then a m62 it feels like a turbo in a way and well worth the investment

 

so with what ive stated, I can go with either a 2.9 or 2.8 n a ottp tune n be at 300 till able to go up north to get a dyno tune n make more. I prob will do the option b, in conjuction with what i have allready and be done with cooling. Think if i asl josh he will lean the tune out a hair or will he say sure then not bother lol. anyone on here able to flash a pcm and offer a better start up tune than ottp?

 

y lean it out alittle? i always thought it was more safe to be on the rich side then the lean side

 

the tvs changes the entire cars feel from the m62. i ran an m62 2.6 in my tvs 3.1 and we were neck and neck until about 4krpms then i pulled him hard and kept going

 

just so its not so pig rich.

 

Actually every unit sold comes through here. Not just ours, every vendor this side of the world.

We have never offered a tune for a 2.6" pulley.

No one besides us offers a tune. The base tune that comes with the kit is setup for a 3.1" pulley. There are so many variables with each car it's nearly impossible to get the tune 100% correct. Maybe we can get you setup with hptuners in a combo deal and I can help you tune the car via email.

 

The TVS off Meth injection or E85 is sort of slow. There is no low end but it does pull hard all the way to 7k. That is the "turbo" feeling some guys talk about. You need octane and timing to make OMG HP on the TVS. I would not recommend running a TVS on without raising the octane of your fuel mixture.

I would be willing to put my E85 M62 up against any 93 octane TVS car.

https://www.cobaltss.net/forums/2-0l...soline-190724/

And I have recently made 303/273 on the E85 M62 vs 293/258 on the 93 octane TVS. So it would not even be close...

 

But people have made more power on 93 with a tvs then that.

 

I'm glad to see OTTP is in this thread
Do you guys ship to APO addresses?

 

Yes sir.

 

Sweet, tax returns -> TVS!

And what will it take to work on a tune VIA E-mail w/hptuners?

 

go to a mustang dyno and you can fudge it some

 

thank josh for deal, will here from me on monday.

 

also how fast did the stock clutch wear out.

 

Get some octane going on with that TVS and you will like it a lot. It wont have the sluggish jump feel people on regular gas talk about. My E85 TVS setup takes off harder from any RPM than my E85 M62 setup ever did, and the M62 setup would have pulled quite a few (not all) pump gas TVS setups on here. (Did 109.7mph traps)