Procharger and a DFI
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
The L-98 does not use the press on sleeve for the dampner pulley for either the 8 rib or a cogged drive. It is simply a bolt-on affair, like the old small blocks. However, the last quote I saw from ASP for the 8 rib for a fellow forum member, on the L-98, was over $1000. I got mine for like $675, but that has been a few years.
I will say that the 8 rib had minimal benefit for my application. The problem is that a small pulley on the blower unit that is required for the lower step-up in the P-600, P1SC, and the D-1SC. The D-1 has a different step-up like the D-1R that allows you to run a larger diameter pulley on the blower and still hit max impellor speed for the lower revving L-98.
Do not be fooled into thinking that smaller pulley is going to answer your need for higher impellor speed, as you will find that with smaller pulleys comes more slip on the belt. I did run the 2.67" pulley on a P-600B years ago, and saw 11 psi @ 6200 on a seriously modiifed motor. I later moved to the 2.25" pulley on the P-600B and saw a max of 7 psi (and lots of black soot on the surrounding bracketry).
I would expect that you would see 8 psi with your set-up.
Best of Luck,
Aaron
I will say that the 8 rib had minimal benefit for my application. The problem is that a small pulley on the blower unit that is required for the lower step-up in the P-600, P1SC, and the D-1SC. The D-1 has a different step-up like the D-1R that allows you to run a larger diameter pulley on the blower and still hit max impellor speed for the lower revving L-98.
Do not be fooled into thinking that smaller pulley is going to answer your need for higher impellor speed, as you will find that with smaller pulleys comes more slip on the belt. I did run the 2.67" pulley on a P-600B years ago, and saw 11 psi @ 6200 on a seriously modiifed motor. I later moved to the 2.25" pulley on the P-600B and saw a max of 7 psi (and lots of black soot on the surrounding bracketry).
I would expect that you would see 8 psi with your set-up.
Best of Luck,
Aaron
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Originally Posted by AKS Racing
I will say that the 8 rib had minimal benefit for my application. The problem is that a small pulley on the blower unit that is required for the lower step-up in the P-600, P1SC, and the D-1SC. The D-1 has a different step-up like the D-1R that allows you to run a larger diameter pulley on the blower and still hit max impellor speed for the lower revving L-98.
crap.
I do recall Chris (Brand-X) has the same setup as me and Bruce and he's seeing somewhere in the 15-20psi range without slip so I might luck out with some idler pulley relocation.
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Originally Posted by jerkyboy
Thanks all. Fast Glass, I am running MAP but I will need to switch out to a 2 bar. What kinda power are you making on your package?
For what its worth, I also bought my pulley from TBYRNE. He got it to me quickly and cheaper than what ATI wanted for it. Look around here, and you should be able to get a phone number. I think the website is www.tbyrnemotorsports.com.
As for power on my setup.... I have'nt been able to get it on the dyno yet. I'm hoping to do it either this fall, or early next year. The guy I bought my FAST setup from hooked me up with a file from a similar setup to get me in the ballpark. He'll also be the one tuning my car. As of right now though, it runs good.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 243
From: Northern VA
hmmm. I hear a lot about belt slippage with the LT-1 equipment. Is that just because they rev higher? All you guys running above 10# and above--- are you running lower compression? With my 10:1, what's safe? I want to see some good gains for my effort here.
TJ, I will email you regarding the 2 map sensor.
TJ, I will email you regarding the 2 map sensor.
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Originally Posted by jerkyboy
hmmm. I hear a lot about belt slippage with the LT-1 equipment. Is that just because they rev higher?
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Originally Posted by jerkyboy
hmmm. I hear a lot about belt slippage with the LT-1 equipment. Is that just because they rev higher? All you guys running above 10# and above--- are you running lower compression? With my 10:1, what's safe? I want to see some good gains for my effort here.
As for 10:1, with proper tuning, you can run decent boost for a long period of time. I ran 11.2:1 with 8 psi for several years, and I was still burning chips at the time. If I had it to do over again, the computer would have been one of the first items to be changed.
Aaron
