-DUNNY-

my car is at the shop right now, i had a 2.75" 8rib vortech pulley installed, i have the innovations 8" balancer, and A&A direct drive set up.

issue is my car is only seeing 16psi peak boost, the shop says it is belt slip on the carry. they said they have maxed the tensioner out. i am running the suggested K080530HD belt

ysi, A&A direct drive, innovations 8" balancer

original set up was 3.47" pulley=13psi
then went 3.125 and was 15psi
now i went 2.75" and its 16psi with slip

any suggestions?

SquatchMachining

Your belt is slipping. 8 Rib will not hold a 2.75" pulley but it will hold a 3" in most cases. Even 10 ribs slip on the 2.75" a lot of times unless you really have your belt length, alignment, and tension dialed in.


Go to a 3" slotted pulley that A&A offers or convert to a 10 Rib drive...


Do you have the reinforced A&A spring tensioner or just the standard one? The reinforced version will have a 1/2" aluminum plate welded to the back of it and a bolt that runs all the way through it. Im assuming you probably just have the standard tensioner and under that high of a load it will flex.


Your best solution to this problem is to get the modified tensioner and convert to 10 rib. I run a 2.75" with no slip issues as do many other members.

-DUNNY-

[QUOTE=SquatchMachining;1590599459]Your belt is slipping. 8 Rib will not hold a 2.75" pulley but it will hold a 3" in most cases. Even 10 ribs slip on the 2.75" a lot of times unless you really have your belt length, alignment, and tension dialed in.


Go to a 3" slotted pulley that A&A offers or convert to a 10 Rib drive...


Do you have the reinforced A&A spring tensioner or just the standard one? The reinforced version will have a 1/2" aluminum plate welded to the back of it and a bolt that runs all the way through it. Im assuming you probably just have the standard tensioner and under that high of a load it will flex.

when i talked to A&A they pointed me in the direction of the 2.75 and 2.85 pulley with my setup as they said anything over a 3" is a waste on ysi. any suggestions on where to purchase the 10 rib setup? ecs?

SquatchMachining

You can get all the parts you need to convert that bracket to 10 rib directly from A&A. Give Andy a call.

croatbob

A&a sell the 10 rib. I think you need to change to an ecs bracket to run their setup which I think is cog drive not 10 rib. 2.75 will slip on an 8 rib

SquatchMachining

ECS's kit is 10 rib as well. They offer a cog driven balancer for direct drive to eliminate the slipping of the 4 Rib A/C belt. As he already has the A&A bracketry though, all he needs is a new balancer, longer bracket spacers, and wider idler pullies and he will be good.

-DUNNY-

can i get away with a 2.85 slotted A&A pulley now while the car is in the shop, so it can be tuned and finished? then i can gather up the 10 rib set up over the winter and install.

SquatchMachining

It will slip. Just go to a 3" and be done with it till you upgrade to 10 rib. A 3" pulley will still make 900whp in most cases as long as the engine isn't a turd.

Arctic Vette

Try a slightly smaller bet too imo, if they are stretching enough it will eventually lead to belt slip.. Just my 2 pennies.

realcanuk

Running the same setup as your with a 3 inch pulley with no slip at all. Making near 20 lbs. I have a 2.85 here but haven't tried it so I don't know if it would slip or not. If you are going to try it, make sure it is the slotted pulley from A&A..... with that you have a chance.

Unreal

Like the good people above said, anything less than 3.0" is going to have issues on a 8 rib. I couldn't get anything lower than that to hold. 10 rib solved that issues and now 2.75 works great. Makes 24psi and no belt issues. Only belt issues recently in past 2 years since going 10 rib has been the direct drive stuff which was solved by the ECS cog mod for the direct drive parts. That doesn't touch the blower side of things, and you can have that done. In fact, when you upgrade to a 10 rib I would STRONGly suggest looking into that since the balancer will be off.

-DUNNY-

20psi??!! my 3.125 made only 15psi on my set up. i know its just a measered restriction but i seem off then. i have wcch heads (unported) stock tb and intake everything is not ported.

Unreal you sold me this pulley!!! ya dick haha jk man. i remember conversing over quite a few pm's about it was hoping it would work. A&A quoted me 1200 on 10 rib set up. i know i can recoup some selling off my 8 rib stuff. or just pulley it with a 3.0" and drive it.

it is in the shop still, so i guess i will weigh it back and forth, i might as well do the 10 rib while its there, car will be stored within the next month before the ohio winter kicks in.

realcanuk

Every combo is different boost wise. If I would you I would try it with the 3.0 for now, and then you can change later. You might be surprised how it is.


I would even try the 2.85 to see if holds. Since 3.0 holds perfectly... that might too.

SquatchMachining

Its Canadian PSI and Canadian Horsepower, subtract atleast 1/4 from everything they tell you!! HAHA

realcanuk

Yes... exchange rate changes daily.....

-DUNNY-

josh at A&A is trying to sell me on a even smaller pulley at 2.70 razor cut and a smaller idler pulley??? i called and he replyed in the A&A question thread stickied at the top of the forum.

i know you guys have the experience in this, the shop says they have my tensioner maxed out and the belt is almost touching itself around the blower. my 2.75 is not razor cut ribs in it.

if i should throw down the $200+ for a 3" and belt. or the 1200 for a 10 rib and recoup some selling off my 8 rib stuff.

did any of you guys run the 2.85 razor cut 8 rib belt from A&A?

SquatchMachining

I dunno where the $1200 number is coming from though. A 10 Rib balancer is $550, the 10 Rib bracket conversion parts with idler pulleys and everything is only a couple hundred dollars. The 10 rib blower pulley can be bought directly from Vortech or summing/jegs for under $100.. Where is this $1200 number coming from?

realcanuk

I would try the 3.0. That 1200 will be much more if you are paying labor. I would be surprised if the 3 inch didn't make enough power to keep you happy, unless of course you are seriously racing the car.

SquatchMachining

Agreed, this would be what I would do as well. Then just upgrade when the funds are available.


The YSI does like to be spun hard though, the power will come on much harder with the 2.75 than it does with the 3.00", that much is a fact.

-DUNNY-

1200 is what a&a quoted me on everything needed to go 10 rib. the balancer 600 josh said (which i know i saw them for 550), the idler pulleys, brackets etc 350-450 he said depending on, a vortech 10 rib 2.75" pulley 100 and shipping was 11xx amount, over the phone this morning. i see tho it should be closer to 1000.

and with the car at the shop and still needing tuned ($400) i figured go 10 rib now and just have it done and right. i will just have to pay for another 400 dollar tune next spring and 200 plus for the pulley and belt that i will just be removing it for the 10 rib for next yr. thats 600 i can just put towards the 10rib setup and labor. sell my 8 rib kit ect.

i went from 3.47" 13psi to a 3.125" 15lbs. the 3.00 pulley would only be another lb of boost over my 3.125". not worth 20-30rwhp for 600.