Looking for a new pulley

[Monello]

Hey guys, i was wondering what size pulleys everyone was running, and how much increase in HP/TQ, will i expect from one. I know GTPs report a .7 second decrease in 0-60 times from getting a 1 size smaller pulley. So i really want to get one on before next week. Let me know,

Thanks,
Pat

[AaronGTR]

The current pulley you have is 2.8 inches. If DHP reset your rev limiter like they did mine you should already be at 8psi at redline. If you went to a 2.6 inch pulley you should be able to get 10-11psi. Any more than that and you'll need an intercooler to be safe. You might also need DHP to change your fuel maps again or you might run lean, and if your injectors are maxed you might need to change to bigger injectors and add an inline fuel pump. It's hard to tell 'cause not many people have gotten that far yet. If you do change your pulley, make sure you do it right or you'll mess up the bearing seals on the SC drive shaft. You need to use a 3 tooth gear puller to get it off, and press it on by hand. It's highly reccomended to remove the SC to do this. If you don't you might end up sending it back to magnacharger to get the drive bearings replaced. Hope this helps, good luck.

I'm running a 2.5" SC pulley.

[AMRAAM4]

Baaahhhh, my lady got done doing some sewing the other day, so I took the empty thread spool out to the garage, machined the inside up a bit and threw in some metal reinforcement tubing....then slapped it on as my new pulley.......

[aleroboy]

I have a 2.4" available
but you will need a spacer for it
I'm currently running a 2.2" which is good for 13 psi but with headers I'm able to flow lots more and only pull 10 psi

larger injectors are pretty much a must to get down to the sizes I'm running or even go with headers.
also porting the SC inlet and going with a larger TB wil help you achieve more boost.

[Monello]

Well i want to stay away from having to get bigger injectors and stuff for now, i just want to get a smaller pulley that wont require changing anything else. And i did notice that its pumpin 8psi now, after i got the DHP, i thought it was something wrong, guess not.

KmanGT1, where did you get yours from?

[mfuller]

Originally posted by Monello
Well i want to stay away from having to get bigger injectors and stuff for now, i just want to get a smaller pulley that wont require changing anything else. And i did notice that its pumpin 8psi now, after i got the DHP, i thought it was something wrong, guess not.

KmanGT1, where did you get yours from?

You can get SC pulleys from www.pulleyboys.com. Look under Toyota/TRD applications. You want a keyed pulley for the M62 blower. As John said, you likely need a small spacer (I forget exactly the thickness, but John has my old one that was made out of high-stregth tool steel).

Your car may react differently than others. KMan is able to safely run a 2.5" pulley on a stock cal, but my car ran very lean on the same combination. Spaz's car seems to be okay on a 2.7" pulley. You'd be wise to talk to DHP first and find out how much more room there is to tweak the fuel tables before your fuel injectors go static.

[jaketuff]

There's the answer Matt!

You will run lean with any adjustments to increase boost. Kman's car has some extra fuel I think, b/c all the rest of us have run lean with the slightest adjustment to the pulley.

Pat

[Monello]

Yea im going to call them, and find out. I know my car runs EXTREMELY rich at wot. I told them to bump it a little higher for future mods. At WOT my O2 is reading close to 1. Mostly around 980-990.

Anyways, what size should i get? 2.5 to small? or go for the 2.7? Im going to the track next saturday. And need to race my cousins Mustang 5.0 Notchback. I have money on it. =P

Anyways, let me know, i can post some atap like readings using my autoxray tool.

[jaketuff]

Okay,

Stock Pulley = 2.8"
The pullies are only refundable within a few days of purchase. FYI

The size I would get with your setup and car's potential would be the 2.5," ONLY B/C you say you are getting more fuel. I know that cars have gone lean immediately with just the 2.7" and adding fuel/tuning more fuel is a good time.

The 2.7" and 2.6" will add power, but the 2.5" is really worth the effort. It will near 10 psi peak boost, and will place your car near the mid 14's rather than a 14.7 est. on the 2.8." You will likely need fuel trim adjustments thru DHP, but you have the hook up with them and you should be SOLID after getting the fuel/air dyno tuned by them. Low 14's are not out of the question with a good tune....

NO BS
OUT

[AaronGTR]

Him and I are already getting 8psi peak boost because of the reprogrammed rev limiter (more rpm) so we could probably get 10psi+ with a 2.6" pulley. With the right programming and that pulley I think we'll be hitting 13's soon.

[aleroboy]

What was your guys' rev limter set to?

I'm just atouch away form 13's at sea level with no programming.

I've decided my reprogram wont come till gap or so when I can go out to dhp and get it done.
Right now I'm working on a liquid to air intercooler
I just ordered the spearco catalog yesterday.
first step is moving the battery to the trunk for more room.
next is figureing out if the sc outlet needs to be modded or if I can fit in the elbows I need.
its not gonna be cheap but it will definately help performance.

[Monello]

Well i ordered the 2.5. 90 bucks for about 20-30HP is going to be nice =P

Anyways, what is this spacer that everyone is speaking off, do i call them and tell them i need it or what? Can anyone make me one. John? Ill pay for one if you can send it out asap. That would be AWESOME. I was going to go with the 2.6, but if Kman can handle the 2.5 on stock cal, im sure DHP can think of a way to make it run very nicely.

Anyways, cant wait to see the new numbers =P

btw, i too was thinking of doing an intercooler setup, If you really think about it, it isnt that hard. We just need two elbows that go down, then thats where one goes to one side of the car, and the others, to the right side. How much did you pay for yours? This is a upgrade in the near future for myself. I may go buy the cheap flex tubing for heater ducts to use to find out how to route it, when i finally get it, then use it to make the real tubing. Im sure if we put our ideas together, we can make this a great mod for a decent price.

later,
Pat

[aleroboy]

I'll measure my washer and see if I can get ya one the same size.

about the intercooler
a air to air or front mount is not practical for us
it would put about 9 feet between the sc and the plenum
efectivly causing the same thing as turbo lag.
there is very little room between the sc and plenum.
I would be having a custom inlet built on the plenum and possibly shavign the outlet of the sc and welding in and aluminum elbow unless I can get a silicone one to fit.

I'm not just thinking about this I'm going to do it as cash flow permits. its not going to be cheap though.
I'm looking to sell the intercooler kit for about $1600 when completed. lots of custom fab lots of expinsive parts.
the water pump is $225 or so the front heat exchanger is arround 280 and the liquid to air unit is about $700
plus hoses, mounting hardware, and all that fun stuff.
I'm looking at other front heat exchangers and ice tanks for the trunk as well. its in the very rough stages of R&D right now.
as I get updates I'll post.

a good intercooler can add as much as 40% more hp so I'm not cutting corners on this project.

[Monello]

Hey, thanks for helping me out with getting the washer. I checked my e-mail and they already sent out the pulley! Very quick shipping.

As far as the I/C. I keep hearing mixed things, and how air to air is sometimes better. Im sure you have been doing a lot more reading about this stuff. What i was going to do was get the intercooler that i posted in my other post. Since the inlet/outlet are on the same side. That would put a max of 3 feet between the supercharger/plenum. The ones i have been looking at have very lost resistance, 0.2 PSI loss, from 15PSI of boost, which is nothing. Once it gets nice out, im going to jack up the car, and look under it and see how we could run the tubing. I just trying to find a not so expensive way to cool the supercharger. The reason i may be doing this, is because im getting the intercooler in the picture for 100 bucks, its used, but only for a few months. And i can have custom piping made for very cheap! The muffler shop that i got my SLP installed at told me they can make any piping. So im going to get the flex piping from Homedepot to see how i can route it, then cut it in half, and keep it the way it is, so they can copy it into Stainless steel.

Anyways, this is just a little summer project for me, im sure the one your making will look a lot nicer, and cool better, so i will be getting yours once i get money =P

[aleroboy]

Well even with the outlets on the same side it has to pass through the IC and come back. Then you also have 3 feet back up to the plenum. so 3 feet each way plus passing through the ic, thats a lot of distance.
Also I dunno about you but cooling is allready an issue with me. having a fornt mount in front of the radiator will further rase the temps.

I've herd good and bad about both. but after reading spearco's site I'm definately going liquid to air.

direct quote off their site:

The real facts are that other than a small additional weight factor, a proper application of an air/liquid intercooler will increase power much more than enough to offset any additional weight and will always yield superior performance over an air/air unit. And, sometimes the additional weight is needed for ballast and this disadvantage is erased.

[Pacman]

as far as the RSM kit goes, i dont believe we can fit a smaller pulley on. i'm not 100% sure, but does anyone else know what is available for the RSM kit?

[aleroboy]

after looking at the 2.4L kit I'm pretty sure you cant really swap it unless you have the sc drivin off the crank

[waffler]

will the RSM for the 3.4 be able to fit a smaller pulley?

[Pacman]

yeah thats what im thinking too aleroboy. the shop guys that installed my sc said that it looked really small to start out with. it starts out as an 8 lb pulley. 6 lbs where i live due to elevation. waffler, you might want to talk to Irate about that. he has the 3.4 kit but as far as i know i dont think you can fit smaller on either kit