Hey guys/girls,

I was just curious if it was really all that possible or a good thing to run a 2.5" Pulley on a Tvs with a stock motor, although some mods will be ported head with upgraded valve springs and other supporting mods. What do you guys think, will it hold?

 

Has in the past

 

yes it is possible and has been done numerous times. I would include dual pass or single pass, opt b, extra h/e, port supercharger, great tuner, wideband, interceptor

maybe want to throw on 3" intake and ls3 throttle body while your at it.

 

Who has run a 2.5" pulley on a TVS? I know Area had one of a handfull of 2.6 pullies for it.... never heard of anyone running a 2.5 on the Harrop?

 

lsjwannabe. he logged 27psi.

 

Oh yeah forgot about Seans... LOL he had a ported head too didn't he... I know Bryan made 29psi on the 2.6 before the ported head!

 

Sean was who I was thinking of. Dub, I'm not a total blond lol

Not on a TVS blower....

Do NOT port a TVS, it is designed for best performance from HARROP

 

2.5 on a TVS with stock motor? Is this car running on C16?

 

Cant speak for anything that low but I just fixed mine up with the 75mm pulley and im getting 21.5psi running 23.5 degrees of timing, still fine tuning

93+67%meth/33% water = no knock as long as i keep AFR under 11.8

 

Thanks for the replies guys, no the car is not on c16 gas, just regular 93... Possibly e85 eventually.

I already have a 3" intake and will be getting an ls4 throttle body eventually as well, will need a new clutch too lol... I also have dual pass endplate, opt b., methanol injection, and zzp s3 heat exchanger... that is about all for cooling mods right now...

 

.....

 

2.6 pulley on a tvs with 80# injectors w/E-85 you will be pushing the injectors way over the limit you will run out of fuel before your powerband is peaked.

 

I am not worried about fuel so much as other precautions I should be taking about blowing the motor, which I am sure won't happen. E85 is not happening during this, not enough sources around me for it.

 

 

ya ive been rolling the idea around of a 2.5 for a while... it would be alot of fun to have more tq... subd for more info and such

 

.....

 

ditch it, it'll only hurt you

 

Pump gas (93) and meth.

That was more a test for ***** and giggles. I ran the pulley for a few months on the stock motor to see how the car would react. Motor held up 3rd gear did not.


OP:

My suggestion do not drop below a 2.7" unless you plan on dropping serious money into the motor. 25psi is a lot for a blower to begin with 28 is just stupid.

I made no more power on meth then i did on the 2.7" with meth. People have picked up power with it and e85 but it was not much 4whp annd the same for tq. Not worth it imo. At that rate your on 80's and a return style or 98's.

Now if you want to tear into the motor and play with displacement its a different story... but more on that later.

 

after 2.7 you just start stacking air and building heat iirc need more flow

 

sub'd

 

I am going to be tearing into the motor as I am looking at a motor right now that I am going to be building up.

Josh by your post I am assuming this has been done before, the motor held but tranny gave up????

 

so then i ask this question... what is holding up the power on the car with such a small ring... in my situation heat isnt a problem. and im running at least 25 percent less restriction than everyone else

 

x2

 

Why exactly?

 

This is sean

Yeah we ran that on my car when i was testing the blower for harrop back a few years ago.

The trans imo was more related to a poor clutch, driving habits.

I would not say if you slap the ring on your going to break anything, but i also don't recommend it becuase your adding more stress, heat, taking more power to spin the blower, and really not moving that much more air.