Hi Guys,
We have a bit of a delimma with a belt slippage issue. YSi-Trim running a 10 rib 2.95 blower and an 8" Renegade crank with the driver's side Renegade thick plate type brackets along with a strut tower-to-head unit brace. Several months ago on the dyno I tried a 2.75" Reichard pulley and although boost peaked at 23 lb, within 2 pulls it shredded the belt--our dyno operator suggested we go back to a standard 2.95 pulley. This is where we are at now.
We have had our blower pulley aluminum nitrate meadia (I believe that was the term the shop used) blasted to give it a slightly rough surface (similar to Vortech's "Improved Traction" pulleys). Boost peaked at 22 lb and then rapidly slipped back to 10. And yes, belt dust everywhere Had the belt not slipped I'm convinced that we would have gotten our 25-27 lb that it should have made. I haven't tried wiping down the belt (Dayco) with VHT but , although it would help a bit I don't think that it would solve the problem totally.
I'm at a loss, I honestly do not think that we could possibly get our belt any tighter--this has got to be hard on the snout of the crank, even though it is a billet steel piece. On one hand this is putting undue stress on the carnk but switching to cogs will stress the crank and blower when the throttle is closed at the stripe (track). Personally, I think that cogs will be the lesser of two evils. I am going to talk to Vortech tomorrow and ask their opinion. What do you guys think??
The only thing that we have'nt tried is runnig a strut from the crank pulley to the head unit--Kurgan is making one but only for the 8 rib set up. It would take a fair ammount of fabricating to modify it for our 10 rib. Both our tuner and Kurgan told us to avoid cogs but, what is harder on parts considering how much tension we are putting on our belt?? Personally I am to the point that it's really a toss up whether to try a 50mm cog setup or sell off the blower and go the turbo route. What is my YSi, bracketry, pulleys and a 1 7/8" Kooks headers worth these days?? Looking for any opinions.
Really Frustrated
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