hey ive got a 07 ss sc with ottp stage two, whichincludes the 2.8 smoothflow pulley. i didnt wanna drop sizes any more than that cuz i didnt have any cooling mods. but im buying a meth injection kit, and im considering the 2.5 pulley. think it will make the supercharger spin to fast and damage bearings and what not? i want my car to last a while, but i wanna squeeze a few more ponies out before i go broke on the TVS.

oh and if i put the 2.5 on it, will it run right so i can take it to the tuning shop?

 

Idk man, alot of member run the 2.5", but reliability will be a factor. You should have cooling mods on now with that 2.8", and you cannot rely on just meth injection for cooling with a 2.5". and yes retune because it would be beneficial to run e85 or bigger injectors.

 

Recommend that you get 80lb injectors, meth, h/e, dual pass endplate + option B. and a return to run 2.5

 

hell run it with a retune and meth 80s arent 100% needed cooling mods yes

 

2.6 is the lowest i would go.

 

shaunmcdee ran 2.5 or was it 2.6 for awhile
bug him =p

 

2.5 should have dual pass endplate, aftermarket h/e, methanol and #60s. option b would be nice to have as well.

 

People have run 2.5" for awhile with no cooling mods and gotten away with it. Depends on how hard you push it and how often... Just don't do back to back pulls without a bunch of cooling mods.

I'd recommend all of the cooling mods such as dual (or better single) pass, aftermarket H/E, option B, etc. Meth will help but it isn't absolutely necessary depending on how the setup runs. I'd certain recommend an Interceptor also to monitor the IAT2's. A retune will be necessary as the blower will be moving a lot more air earlier. Porting the blower can also help a little.

I never had a problem with running a 2.6-2.7 on my dual pass, zzp s3 w/ option b, ported blower.

Just be careful...

 

Please don't do 2.5. Theres nothing but problems with them. Go 2.8 with h/e, dual pass, and meth or 2.7

 

n00b question... difference between single and dual pass is??? and the benefit of apparently running a single over a dual? or dual over single

 

thanks for the help guys! guess im gonna stick with the 2.8 for now and throw my money at some cooling mods before i work on hp

 

your wrong and uneducated back when the first people broke 300 hp with theses engines it was with safc or maft 42lb lucas injectors and a 2.5 pully

 

Lol. 2.5 pulleys are good for a short time. Uneducated? Lol. I know an handfull of people who ran these with all the cooling mods and they regret it. Also running 42lb injectors on an 2.5 is just simply retarded, unless you want the car to run for a short time but lile the rest of us here we like reliabilty, and want it to run for an good amount of time and 2.5 isn't the way to go. So can anyone on here say they ran the 2.5 and it ran for more than an year please chime in. And you gtfo

 

go look at the official dyno thread and look at stock m62 blower number. everyone that is right around 300whp is using a 2.5 pulley

 

Then you don't have the *****

Troyss you are a ******* troll. Have YOU ran a 2.5? ****, I ran a 2.5 on my car, only a dual h/e setup and ran it FINE for a year. No methanol, stock header, 2.5" catback. 13.2@108. Sold that blower tho and never shaved the new one down to do a 2.5 so I stopped at 2.6

I tuned a 2.5 pulley car and it is still running fine. Going on 2 years now. No issues other than clutch. Dyno'd 289hp/251tq

True

 

ya i agree....

 

well ive been on thes board for alot longer then you and longer then most of the people here now and untill you start reserching and reading if you can read before you make stupid assupmtions back then all we had was 42s and we ran them on 2.5s for a very long time with out cooling mods and we survuved just fine and it was a very reliable setup for what it was

 

Man these threads get ugly FAST. Im gonna agree with Snakes709's statement. With 80s, e85, all the cooling mods you can throw at it. You can see some pretty sick numbers with a 2.5. Enough of all the negative bullshit in all these threads like this.

 

well they get ugly because people think they know the absoloute about making power with this platform they werent here from the begining when we were tryiing to make the power that is alot easier to reach now because of the pioneers like i said the biggest mods we had for tuning was a maf t and a safc and make your own fuel injector harnes with luca 42lb injectors and a 2.5 no dual pass no option b no hp tuners no e85 and 300 hp was made and it was reliable u just had to be nice untill it was needed

to run a 2.5 60s minimum e isent needed met/water not needed but nice to have and a dual pass now thats available yea id say needed but the no matter what u use its still all in the hands of the tuner if you want the negative **** to end teach the new people how to search and read

 

its all in your tuner. tom tuned me i have a bigger heat exchanger and not dual, and header intake exhaust and im doin just fine with my 2.6.
and its also all in how u drive your car if u drive like a ******* 16 honda driver rippin vtec then its gunna blow, **** any car will.

 

lmao 16 honda driver

 

I was on a 2.6 with no cooling mods for over a year. No problems. Just don't drive like an idiot on the street. At the track if you don't hot lap the car... and keep the rpms up while staging your IAT2's will stay cooler. But i seriously wouldn't recommend it lol

Do as I say not as i do

 

Do the 2.5. You'll appreciate the torque. A lot of the reliability is in the tune......if you must drive it to get it tuned, stay out of boost until tuned.

 

thanks everyone. i am only gonna drop to the 2.7 just for the hell of it. lol. prob wont build much more boost, but i figure every bit helps.

 

*****