southspeed

I don't think you have to remove the balancer to do a dd correct? How many ribs is your balancer?

Patriot Six

I have the secondary drive with 8 rib on my LS7. Car makes 837whp.

Patriot Six

You need a completely new balancer with three sets of ribs for the new A&A secondary drive.

C U IN REARVEIW

would I be able to use my 3.6 6 rib" pulley (w/o slippin) with the secondary drive? Or would/should I still go 8rib or 3.47" pulley?

Patriot Six

You probably won't need a secondary drive with a 3.6 pulley. Balancer with secondary drive would be 8 ribs so you might as well go 8 rib on blower pulley as well. I kept the stock size balancer (7.28) which maxes out the V3-Ti with the 3.47 pulley (8 rib only).

C U IN REARVEIW

i meant to say im going to a 3.4" 6 rib pulley.....expect belt slip w/o secondary drive?

Patriot Six

You may, if you don't have the latest A&A bracket with billet tensioner. You also have a slightly larger balancer than me so you should have more belt wrap. However, the secondary drive would allow you to squeeze more boost out of the blower without having to periodically adjust belt tension and put high loads on your accessories.

Nick_04k

So anybody run a carbonite pulley? Would changing only the SC pulley to carbonite do anything?

schpenxel

What size belt and pulley are you running?

Nick_04k

It's in the original post. I'm running a 3.25 with a K060900, not quite maxed out on the manual tensioner.
I think I will switch to the RPMK060895 next time I do a belt swap. Also considering doing the carbonite/griptec
style pulley. I can't find any centri related feedback on them
...although I see LSA guys posting good results.

southspeed

I wonder if you would make more boost with the 3.4?

Unreal

It very well may, and be more reliable as you are not shredding the belt.

The griptec pullies work ok. If it is a borderline situation they do help, but if you are losing all tension, it won't help that much. It depends on the issue.

You are better off spending the money on a DD and just fixing the issue.

schpenxel

900 is too long IMO. I’d use an 895 at minimum, 891 will go on with enough cussing. I’m pretty sure ECS recommends an 891. Sorry if I missed something, mostly posting from my phone these days so I don’t always read the whole thread.

To get an 891 on I had to remove both alternator bolts to let it angle enough to get it on. Not ideal but it went on. With 895 I took one bolt out and left one in and that got me enough room to get it on. Once either goes on once they usually aren’t that bad to get on again later, not sure they stretch a little or ribs settle or what but that’s been my experience.

I’d really try an 895 or 891 next and see if it helps before doing much else. Just my opinion of course.

Direct drive, etc would for sure fix it but also costs a bit more. I’d give a new shorter belt a shot. Worst case you’re out like $20 and a bloody knuckle or two

southspeed

the chart says for 6 rib 891 for 3.25 and 895 for 3.47.

Nick_04k

So i logged yesterday and got 167kPA @ 5600rpm on one pull. Every single other pull i could never get more than that even up to 6250rpm. Definitely slipping a good bit!
Although im still not 100% maxed out on the tensioner yet i likely will be after i tighten it warm on my next adjustement.
Ill move to an 895 on the next change...That is what was originally recommended to me from A&A but even the 900 was difficult to get on with the alternator loose and everything.

I have another problem though, car is running the AFR up to 13.0 at the end of the pulls. Tuner thinks maybe its misfiring..? Definitely not audible, i cant tell whatsoever if thats the case. Going to install new OEM coils, wires, and he recommended NGK 3177 gapped to .030.
Currently have TR6 gapped @.030

My SC experience hasnt gone very smooth this far

Patriot Six

If you want to max out that blower, secondary drive will fix your belt issues for good or else you'll be fighting it regularly. As far as your tuning issues, I'm sure your tuner can work through it, but you may want to go one heat range colder on the plugs.

Nick_04k

One heat range colder than what im running, or one less than he suggested?
I keep hearing about guys slipping the alternators on secondary drives?
More than likely ill be doing it at some point but im sick of wrenching lol. I couldnt care less about the $700 the DD is going to cost, but between my other projects i dont have time to add it at this point.

Patriot Six

One colder. NGK 3177 is same as TR6. The new A&A secondary drive eliminated the alternator slipping issue by utilizing better placement of the tensioner for the alt belt.

romandian

a shorter belt gets you less wrap. right?

Unreal

But it is not $700, it is $1100+ last time I checked.