Quote:
Originally Posted by Pro4Jackster
JTran said I should save the impeller swap for last. Changing the impeller could cause Vortech to void the warranty on the blower. Once everything gets broke in and we've worked out any kinks, Ill start with the cogs and move on to the impeller. I may run out of fuel or MAFs before I ever get that far.
That's a lot of speculation. Ha ha. I haven't even driven the car yet. I tend to get carried away.
Why did you go with a 32 cog s/c pulley instead of a 30 or 28? With them you could run a larger Serp pulley up front and still have the higher blower RPMs. Was it a clearance or belt issue?
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When you install the SC on to the motor the idler pulley on the back of the flex plate needs to clear the engine block. I had a Jack Shaft of 34 and SC Drive of 32 but when you put the belt on there is no idler pulley adjustment. So it causes the pulley to hit the engine block. Vortec makes 2 belts a 72 and 76 I believe. The 76 is to loose and wont fit unless your running 34/34 the 72 works fine 32/32 or 30/32 30/34 anything less on the SC pulley side and your Idler pulley will start to rub on your SC drive COG when you adjust the tension on the belt.
My final COG set up is 32/32 x 35mm and the 350Z 2.5 lipped aluminum idler pulley set (which is smaller than the plastic Stillen 3 inch). This set up will keep me out of the 12 lbs boost range. It is conservative, I would go all out but I like to drive my car every day. So i need it to be conservative.
If you want to go all out at 12lbs of boost get the Vortec SCI upgrade. Comes with compressor and a 928 impeller, add DW320 and 1000cc injectors and your at 480/500 HP all day.
For the serpentine belt on the front, I thought about running 10 rib but that is for another day. Hope this answers some of your questions. The reason my build is take F_ing for ever is the COG sizes, later I might drop to a 30 tooth on the SC side and slide my 34 Jack Shaft COG back on but not know.
Take a look at this thread:
Motion Lab Tuned Nismo 484whp/400wtq @ 12.5psi w/ Vortech impeller on the Stillen S/C
Yes as soon as you put COGs on it the warranty is void. I am on the phone with Vortec weekly, good customer service and knowledgeable sales people.
Hope this answered some question..
