If you notice the date on that thread Triji .....it was old !! I believe Vortech corrected the pulley after that happened. I just wanted to show what happened to compare what MIGHT happen with a 2.62 . As I stated....I dont think the 2.62 will work...at least with out modding it any way .

 

Ok, Cool.... I am going to place it on there today as I am putting on my new GTM idler pulley while I have my belt off and see how it fits... Cant put the 2.87 on tho until I get my Utec / Inj's / Walbro in...

I am hitting 8.5 psi w/ the 3.12 now... I am interested to see if the PSI increases a bit with the new GTM idler pulley installed.

 

Triji
His whp and trq. leveling off may have come from timing being pulled and or fuel being added . And not belt slipping . I think he said he only had 14.5 degree's of total timing at redline

 

thats why i want to know what similar setups are running timing wise, i wasnt sure if that was low or high

 

The 2.62 rubs the s/c bracket. I had to space it out 1/4 of a inch rather than mill on the pulley or bracket. It's working fine. The belt is lined up great. No problems with it even at 6500rpms.

 

What year is your car ? On mine [ 03 ] the jackshaft sticks out away ffrom the main bracket . And when I put on the unmilled 2.87 , it tore up the edges of the jackshaft as shown in this pic
https://my350z.com/forum/attachme...7&d=1091575043



What your saying is the the 2.62 hits the main bracket and not the jackshaft . Can you take a close up pic of it ?

 

I would be careful adding back in the timing ! Might want to take it to a pro tuner to make sure . Looks like you have it real close on the tune and it shouldnt take a tuner long at all to finish it to get the most out of it .

 

Yeah the lip on the bracket is what the 2.62 hits.

 

Im thinking you mean the jackshaft . It [ the jackshaft ] sticks threw the main bracket like in the pic . Still would be nice to see a close up of it though

 

How safe is that with a overdriven sc? Because with a 2.62 pulley, the blower is spinning at 59,000 @ 6500 rpm. And the max recommended impeller speed for a V2 SC-Trim blower is 53,000 rpm.

 

How much time is being spent above 6000rpm's ? I dont think over spinning a blower is as bad as some make it .

 

Well what if you were on a long track doing 30 min sessions. Would it hurt it in any way? What do you think the limit should be...up to 63k safe?

 

Well thats a whole different story and I wouldnt know the answer . Most guys with a SC arent at the track and there are a hundred other factors to consider before saying something is safe or not .

My point was as I stated...MOST of us dont spend much time above 6000rpm with a SC and over spinning the blower isnt going to hurt it .

 

what about overdriving your $7000 engine with more power??

 

my motor only cost $3900.00 by the way ! ooops forgot the cams..$5100.00

 

I meant a brand new OEM motor, not what any of us have paid for a built bottom end or cams. Of course no one would buy an OEM brand new engine, but still, all this worry about the blower when the engine itself is the thing people should be more worried about with the labor involved with pulling the engine out etc

 

just add a wastegate to your setup i did

 

also any pulley under the 3.12 has to be milled so it doesnt hit inside jackshaft and bracket.

 

blackbird-I am also running the 2.87 pulley on a similar setup as yours minus the fuel return, test pipes and spacer. I am at 384whp on a pretty conservative tune. This weekend I am switching from from my HKS Hi Power exhaust to GReddy Evo TT and also installing some Fast Intentions HFC's. Hopefully this will get me pretty close to 400whp. That's a pretty decent number bro.

 

so has it been concluded that any pulley under the 312 has to be machined to fit properly without having to worry about problems or did i hear that vortech fixed that problem... can we get someone from vortech to chime in maybe (steve) or other people that may know...