i know that alot of people say taht a jsrc is only good to 9psi, by adding the smaller pulley, but arent there other pulleys on the sc that you can alter the size to adjust amounts of boost? also how small can you safely go w/ a custom pulley to gain more boost? how many psi has anybody taken there jsrc to on a prelude?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SexyH22 &raquo;</TD></TR><TR><TD CLASS="quote">i know that alot of people say taht a jsrc is only good to 9psi, by adding the smaller pulley, but arent there other pulleys on the sc that you can alter the size to adjust amounts of boost? also how small can you safely go w/ a custom pulley to gain more boost? how many psi has anybody taken there jsrc to on a prelude? </TD></TR></TABLE>

The problem with running more boost lies not with the mechanics of spinning the s/c faster, it's more of a problem of decreasing returns. The JRSC generates gobs of heat, and the more heat in the air, the less HP you make. As you crank up the boost on the JRSC you'll increasingly risk more and more detonation for less and less power gains.

Supposedly Endyn (and maybe others) can rework the blower for more boost, but maybe those more knowledgable can speak on that...

 

I can only speak for myself, but I replaced the pulley on the passenger side of the jackshaft. In that location, you need a bigger pulley to make more boost. With a bigger pulley you're actually reducing the chances of belt slip.

Anyway, with that replaced I am now running 11psi boost. Depending on what your setup is like, boost levels will differ (i.e. better flowing intake/exhaust will have lower boost levels because air is flowing more efficiently).

There are basically 4 locations where you can change pulley sizes. This is the link you want to read:

http://home.tampabay.rr.com/prelude/faq.html#boost

 

so you have the smiller pulley to bump you to 9psi, then also a bigger pulley oh the side of the jackshaft to push you up to 11psi? where did you buy the bigger pulley?


Also, has anybody ever successfully installed an intercooler with the sc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drachir &raquo;</TD></TR><TR><TD CLASS="quote">I can only speak for myself, but I replaced the pulley on the passenger side of the jackshaft. In that location, you need a bigger pulley to make more boost. With a bigger pulley you're actually reducing the chances of belt slip.

Anyway, with that replaced I am now running 11psi boost. Depending on what your setup is like, boost levels will differ (i.e. better flowing intake/exhaust will have lower boost levels because air is flowing more efficiently).

There are basically 4 locations where you can change pulley sizes. This is the link you want to read:

http://home.tampabay.rr.com/prelude/faq.html#boost</TD></TR></TABLE>
I also have the Motorvations pulley, and I too see about 11 psi of boost. The Endyn pulley is not as large as the Motorvations pulley, and produces about 9 psi of boost, so I'm told.

The Endyn blower rework DOES work, and allows you to run a bit more boost. However, you need fully programmable engine management for that.

I believe that with a manual transmission, Endyn rework, 12 psi, and a custom sheetmetal intake manifold that incorporates a few Laminova cooling cores could net about 300 whp. But then again, that means a whole lot more money than I currently have.

 

where can you buy the motorvations pulley, cause i have then Endyn pulley. and how much is it?

 

Or, you can do what I did and just put on an H23 pulley and get 12psi.

pm me if you want it for small change.

 

oops. Never mind. I forgot about the 5 rib six rib thing. Not an option for you.
Sorry.

It worked for me because I had a 4th gen with all the 5 rib stuff.

 

dammit i got all excited... lol if im runninng 9.5:1 compression, you think 12pi is too much w/out some kind of an intercooler?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SexyH22 &raquo;</TD></TR><TR><TD CLASS="quote">dammit i got all excited... lol if im runninng 9.5:1 compression, you think 12pi is too much w/out some kind of an intercooler? </TD></TR></TABLE>
It's too much without a blower rework by someone like Endyn.

 

Yep. My intake temps were around 240 deg F. if I remember correctly. NOT good. Still boosted like a sonofabitch.

 

at what psi?