• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Oh great... Not another pully size thread

Frosty

Frosty

I Write E85 Stickies
Normally I never would post a thread like this but I seriously am not sure what pully size to get for my e85 swap even after some serious searching.... Got a bit of an interisting setup. 01 GT, ZZP SSM90 kit, GEN V Blower (On a ssm90 LIM this is the interisting bit), ER Rockers, PLOG, 3" DP, Northstar TB, LQ4 Maf, Gtp 2 bar map sensor swap, 180 tstat, CAI, 60LB siemens deka 4 injectors, ZZP rails, Alternator rewire.....

Planning on doing a vs cam and headers later this summer but for now I was just switching to e85 because its basically a free mod at this point. Im currently running a 3.6" pully 11.5 AFR, and 16* of timing (Didnt gain any power going above 16* of timing on the dyno at any boost level).... No kr at any time except my occasionally lean tip in (havent got around to fixing that yet) and the usual bit of kr during shifts.

Got a casper fuel pump rewire in the mail.... already gained about a volt from the alt rewire.... was planning on dropping to the smallest ssm90 3.4 pully that i own / is physically possible with a ssm90 pully initially.... What im wondering is what pully I should get for when I switch to a gtp belt tensioner setup. (As soon as someone sells me one). I was thinking a 3.3 pully or maybe even a 3.2?

Any input apreciated.
 


If I was you I would go for atleast the 3.2. It is hard to say though with top swap compression and stock cam. On my setup on 93 I had a 3.4" w/ occasional 1-2* KR when running really hard (ei. WOT 3rd pulls) on stock timing. Changing nothing else but going to E85 I dropped to a 3.1" and put the timing up to 21*. 0* KR across the board even on back to back 3rd pulls, made me wish I had went to a 2.9". I only gained .5 psi on my pulley drop though.
 
If you plan to continue running E85, then you should be able to rock the 3.2 once you get the cam in. If you want to switch back to gasoline, I would suggest you stick with the 3.4.

With 9.5:1 pistons, and an XP cam, I was switching back and forth between a 3.1 and a 3.2 on my gen3 with gas.

Sent from my SkyRocket
 
Last edited:
It's simple, scan for KR, tune, drop... Scan, tune, drop... Etc. lolz, how LOw can you go! :)

Take the guessing out of the equation. There's always someone looking for pulleys so you'll get some of your $ back, no biggie!
 
Im running a 3.6 on my genV with rockers and high compression no problem on 91 octain. No kr when im scanning in hptuners. Im putting my pump rewire in saturday and switching to e85 and my 3.4 pully. Ill let you guys know how it goes.
 
You must log in or register to reply here.
Back
Top