Timinsk

iTrader: (9)

Looking to remove smog pump, making a high whinning noise and some other noises. So i'm asking someone who has full removed it and what size belt did you get? This is a 89 camaro 305 tbi with serpentine setup.

thanks,
timinsk

camaronewbie

Tech article states a 6 rib, 96.8 inch belt. I found no one making belts except in 1/2inch increments. Think I ended up using a 95.5 inch - you'll just need to but a 95, 95.5, 96, 96.5, 97 take them all home, use the best one, return the othjers (saves 15 trips to the store).

Timinsk

iTrader: (9)

damn.. sounds good, thanks

trocustoms

iTrader: (1)

When i deleted mine,I used the same belt. You just have to route it differntly. There is several posts about it on here with a drawing of the routing. This was for a tpi serpitine setup if that matters.

camaronewbie

Using the same belt can only be done if you use a delete pulley - which isn't needed, but without the delete pulley you need a different size belt.

Timinsk

iTrader: (9)

so it really needs to be bigger? stock size is like 94.5 right?

trocustoms

iTrader: (1)

Not true. I pulled off my pump and used the same belt. The belt is routed differnt than from factory. Not sure if it works for your tbi but it works for my tpi serpentine. search on tgo for the belt routing diagram. I have it but dont know how to post it on here. I was going to do the same as you and buy a differnt belt until i found the new routing.

Timinsk

iTrader: (9)

hmm ok, hopefully it works

one92rs

iTrader: (5)

its in the tech articles.

https://www.thirdgen.org/serpentine

trocustoms

iTrader: (1)

Upon further review and researching i stand corrected. Although i didnt have to change belt sizes when i deleted my pump, others probably will. A longer belt had already been installed on my car allowing me to reuse my belt after pump removal. Sorry for the confusion.

one92rs

iTrader: (5)

cool deal.

Timinsk

iTrader: (9)

so basically i get that belt thats 96.8", i was just checking because ALOT of people have gotten plenty of other sizes.. i want to make sure :\ never get a straight answer

trocustoms

iTrader: (1)

Yes, the 96.8" Im sure you could use other sizes. Just has to be long enough. I personally am using a 98.0" and it works fine.

camaronewbie

That's why I suggested buying several sizes and using the best and returning the rest - everyone's car is different, and everyone used a slightly different size.

Timinsk

iTrader: (9)

yeah but the belts are $35 each at autozone :P

UnderCover89TBI

iTrader: (25)

just like the article says. a little longer belt with stock pullies.

eseibel67

From the viewpoint of an amateur engineer, I would say the life of those alternator's bearings are in jeopardy with that belt rounting.

one92rs

iTrader: (5)

doesnt seem too different than the factory routing when it comes to the alternator. factory routing is tensioner-alternator-power steering.

eseibel67

Look at the version that's tensioner-alt-WP, w/o PS, w/o air pump.

UnderCover89TBI

iTrader: (25)

it covers 75 percent of the pulley. its still turning the same direction. you think thier is too much tension on it?

eseibel67

I don't know, but it sure looks like it has a lot of side load on it.

slow_90firebird

It doesent matter how much of the pulley the belt raps around. Because these cars have a automatic tensioner with a spring in it. That is what controls the side load on the bearing, the only thing your changing is the general direction the side load is pushing.

The only other way you could effect the load on the bearings is to use a shorter belt witch would make the spring in the tensioner get compressed tighter.

UnderCover89TBI

iTrader: (25)

Yeah that is what I am thinking also