nother

 

and lastly, notice the chew-job on the JS assembly...

im baffled...

truely....

 

you know what, i dont remember for sure, but i dont think my JS assembly stuck thru the bracket like that (if at all)...

hmmm....

we need Gspot35 to check in on this, and maybe mic' the 287 pulley and see what it measures....

 

I think Force needs to chime in here . I think I may just grind off enough of the JS to get the 2.87 to work .It has to be softer metal than the pulley its self , as by the damage to the JS and just scrapping off the anodize of the pulley [dont know] .I will get it to work one way or the other . I just need to find out the best way to get it done . ....Thanks...Scott...you've been a great help....Bill

 

bill-

one thing you DONT wanna do is run a pulley that is no longer balanced....

by scraping at the surface like you did, its possible (albeit not much) that you have 'unweighted a portion of it, and will now have a slight wobble introduced...

this could be bad, if multiplied by, say 50K or so (60K really)....

lets hear from steve!!


ese

ps- maybe a machine shope could groove the pulley for you, using a lathe, and then drill any holes in it to balance it back out....

 

If you could look at it up close you would see that it just scrapped off the anodize , no big deal and I dont think it put it out of balance .{ Ithought of that too ] Thats why I think grinding off the JS assembly would work out best . I got to find out how thick that JS housing is first . I dont believe it will take much more to get it to work , as its already been ground off alot . I understand that Vortech has to be careful of what they say . But I still want to know why you got it to work and it didnt for me . [1] they gave you a different pulley than me . [2] Our JS assembly's are different , either way I want to know . Bill

 

bill--

maybe contact gspot35, and see if he is willing to ship you my old 287 (its a bit scractched, but the rib vanes are true...

eS

ps- he's seeing OVER 9lbs of boost (5at) with my blower, l spec reflash, and 312 pulley.... (the thing pulls HARD!!)

 

I'll PM him to see if he can post a pic of both sides .

 

I PMed him..I dont know how often he comes here .Hopfully he will help out .Im going to call Steve at Vortech again tomorrow , if he dont post a reply to this thread tonight .

 

Gspot35.....you out there.....HELP

 

You've got email...I sent you three views. Let me know if you don't get it. BTW, can't give up my 2.87, it may be going on sooner than later.

g

 

Its looks to me like the Jack Shaft Housing needs to be machined down. The material protruding thru the blower Mounting Plate. That jack shaft housing was not designed to fit smaller that a 3.12 dia pulley (But it could be) I would need to have a 2.87 dia pulley, But it looks like removing about .090 in with a

 

cont.

heavy chamfer would do it.

Anybodys thoughts?????
Scott
Booger
Gspot35

See ya
TimRod

 

That was my thoughts , I still got to get a hold of Steve at Vortech to make sure it's safe to do that . He wasnt working yesterday . Still confused as why esemes got it on and working . That jackshaft housing on his has to be different...Didnt get any pic...gspot...but thx........Bill

 

OK, I was working yesterday, just not at work

I still can't believe that one worked and one did not. The prints have not changed...I found out why some of the pulleys in the latest batches are gray. They needed a thinner anodize, so we didn't do the black hard, which would be thicker. Everything is still OK. They are just not black.

 

Im am going to measure the diamiter of the jackshaft housing and how far it sticks out . If any one has there serp pulley off , could you measure it too , so we can find out if there are differences for one kit to the other ? Or even better yet ...take a pic of the housing with the pulley off and post it so we can compare my housing and others . Hey Gspot if you go to the 2.87...would you take a pic of the housing with the pulley off .As we know that the 2.87 has worked with your jackshaft housing ?Let see if we can find out , Im sure there are others that want to go to the smaller pulley , but are now wondering if it will work or not .We can save others time and money....thx...Bill

 

I got the pulley milled and will try to install in a few days .When I get the time . Doing some other things to it right now . No big hurry as I need to call and make a dyno time to tune any way.I will let you know then....thx for your input...Bill

 

After tuning my car yesterday and picking the tuners brain. He concluded that the 11psi pulley will not make your car faster other than bringing the boost on sooner and running out of boost sooner. I guess what happens is after a certain point the intercooler can't cool enough air fast enough and ends up blowing hot air into the engine. This is where you have detonation, booger. You can see on my dyno runs that at 6600 rpm the hp dramatically diminishes. The boost is there, but the gas is too hot to make good power. I have the 3.12 pulley. What would happen on the 2.87 pulley is that you would loose power at say 5800 rpm and blow hot air into your engine.

Are you sure you want to do this?

Steve from Vortech can you back this up?

 

gspot35, what you are saying sounds like a reasonable hypothesis, but do you actually have any evidence that what you are saying is right?

Do you know the flow capacity of the intercooler (it's pretty easy to look up since it's an off-the-shelf Spearco)? Did you actually measure the intake temperatures and/or fuel temp or is this just supposition?

With the 34 tooth pulley, my dynos do not show a drop off in power from 6600 to 7100 rpms.

--Steve

 

Gspot....I wasnt making full boost to begin with , and with the 3.12 pulley I'm only getting 7.6 lb's .I hope I get to 8lb's with the 2.87 pulley . They rate this blower at 20lb's .Im wondering how they can come up with that number if its close to being maxed out