bigwill1983

iTrader: (4)

I just recently came across a 7-SYi supercharger for my LS2 and i need some help on it. #1. the unit came with a 8-rib 3.125 on it. and i want to change it to a 6-rib but dont know size to use. im using my stock balancer.so which one to go with? these are the one's the sheet show that are good 3.40, 3.60, 3.80 or 4.00?

2001WS6Vert

I wouldn't recommend a six rib on a V7-YSi, you'll have enough problems trying to keep an 8 rib from slipping.

bigwill1983

iTrader: (4)

Why would it slip?

ss1

iTrader: (32)

Because the 6-rib belt is narrower, say.....25%. Even the standard G-Trim version runs an 8-rib.

stevieturbo

It depends entirely how fast he wants to spin it, and how much boost etc.

6 rib can work fine for low outputs.

ls1290

iTrader: (20)

That kind of defeats the purpose of the YSi. Kind of like getting a $3000 hooker for a hand job

stevieturbo

Very true. But he doesnt even suggest he has anything other than a stock motor. He wants to use a stock balancer.

So it points to me, he's trying to fit this unit to a stock engine. Which in that case....I'd think a 6 rib would be fine.
I fitted my YSi to a stock 346 when I first started, the 6 rib worked just fine

Although admittedly.....it only stayed that way for about 3-4 weeks lol.

DeltaT

iTrader: (5)

If you are going to invest in pulleys anyway, why not stick with the 8-rib and change the stock balancer? You're going to have to do it sooner or later anyway.

Jim

stevieturbo

Or seeing as you have a 6 rib balancer...and an 8 rib blower....


just put a 6 rib belt on it. Costs nothing.

bigwill1983

iTrader: (4)

the only thing i chainged was the cam and the lifters(LS7's) 60lb injectors. later i will change it to a 8-Rib since i have sum of the pullys already. this is my first time going with any set up like this. so try'n to get all the info i need. what kinda boost i can get out of it?

DeltaT

iTrader: (5)

I wouldn't go smaller than the 3.80". I'll bet you would run into slippage issues with a smaller pulley and 6-ribs. Maybe see 6-7#?

Jim

bigwill1983

iTrader: (4)

ill run a 4.00 for now to be on the safe side. untill i change go with the 8-rib.

'Trust'

iTrader: (24)