Harmonic balancer and TB
Thread Starter
Instructor
Joined: Nov 2008
Posts: 227
Likes: 4
From: Austin Texas
Harmonic balancer and TB
Fixing to tear into the motor here very soon. Parts that's going to be added will be.
Jam Cam package
317 heads
ARP head bolts
LS9 head gaskets
C5-R timing chain
New oil pump
Meth ( Alky Control )
New balancer????
Not to sure on which balancer to go with now. Do I go with IW overdrive and leave my 3.6 blower pulley to keep from having belt slip issues? Or buy a good replacement that's stock diameter and drop to a 3.4 pulley on the blower? Either way I'm uping the boost since I'm dropping compression a little just can't decide.
If I go with the IW will I need to change out any other accessory pulleys since it's an overdrive balancer?
Currently it's a stock bottom end LS1 with an A&A system plus other bolt-ons making 560RWHP 500ishTRQ
Also is it really worth swapping to a LS2 TB with a LS6 intake? I know guys on here are making great power with there stock TB so just curious really if it's worth the hassle to get it done. Thanks for any input
Jam Cam package
317 heads
ARP head bolts
LS9 head gaskets
C5-R timing chain
New oil pump
Meth ( Alky Control )
New balancer????
Not to sure on which balancer to go with now. Do I go with IW overdrive and leave my 3.6 blower pulley to keep from having belt slip issues? Or buy a good replacement that's stock diameter and drop to a 3.4 pulley on the blower? Either way I'm uping the boost since I'm dropping compression a little just can't decide.
If I go with the IW will I need to change out any other accessory pulleys since it's an overdrive balancer?Currently it's a stock bottom end LS1 with an A&A system plus other bolt-ons making 560RWHP 500ishTRQ
Also is it really worth swapping to a LS2 TB with a LS6 intake? I know guys on here are making great power with there stock TB so just curious really if it's worth the hassle to get it done. Thanks for any input
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I would go with the overdrive balancer and you might want to get one with more ribs in case you plan on upgrading down the line, that way you don't have to buy a balancer twice... I have to fix a leak from my front cover so I just ordered a custom overdrive 10 rib iw balancer... I don't need it right now but I know I will down the line so I figured now is a good time to do it... I'm not sure about a&a's setup but I know with the ecs kit you need to get a different tensioner bracket with the overdrive balancer that way if the belt snaps the tensioner won't hit the balancer and trash it... you will probably need a longer belt but nothing else should need to be changed... go ahead and get a smaller blower pulley too
as far as the ls2 tb, I would skip that for now unless you're gonna swap the whole ls2 intake setup on it also... the ls2 tb is a 4 bolt and ls6 is 3 bolt and I have seen some companies epoxy the ls2 intake snout onto the ls6 intake but I would not trust that under boost and I don't think much power would be gained from it anyway
as far as the ls2 tb, I would skip that for now unless you're gonna swap the whole ls2 intake setup on it also... the ls2 tb is a 4 bolt and ls6 is 3 bolt and I have seen some companies epoxy the ls2 intake snout onto the ls6 intake but I would not trust that under boost and I don't think much power would be gained from it anyway
Last edited by StingrayRebel; Sep 25, 2014 at 10:16 PM.
Thread Starter
Instructor
Joined: Nov 2008
Posts: 227
Likes: 4
From: Austin Texas
as far as the ls2 tb, I would skip that for now unless you're gonna swap the whole ls2 intake setup on it also... the ls2 tb is a 4 bolt and ls6 is 3 bolt and I have seen some companies epoxy the ls2 intake snout onto the ls6 intake but I would not trust that under boost and I don't think much power would be gained from it anyway
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I have this for sale in the 4-sale section if you're keeping it stock diameter. This HB was recommended to me by Josh at A&A for proper fit/clearance and quality to go with my A&A kit. SFI-rated and it is stock diameter and 8-rib/4-rib.
https://www.corvetteforum.com/forums...-balancer.html
https://www.corvetteforum.com/forums...-balancer.html
Melting Slicks
Joined: May 2007
Posts: 2,014
Likes: 48
From: Dayton Ohio
I would buy a 10% OD balancer Jegs, IW, Or Dayco which is same as jegs all are 8 rib and work with 6 or 8 rib. Then buy your smaller pulley on the blower which should still give you more belt wrap than before. If it slips add an A&A secondary drive or flip drive. Then next step would be 8 rib upgrade but I doubt you get belt slip with the correct tension with an ofd balancer and a 3.4 or bigger blower pulley alone.
