Vortech Supercharger, Whats A Safe Pulley Size...

97TunedMustang · September 25th, 2006, 12:14 AM

Ive replaced the stock pulley awhile ago with a 2.87 I however think i might be able to go one step lower. I would like to go with a 2.62. According to vortech i believe i read somewhere, the max rpm for the blower internally is 50,000rpm and there is a utility to calculate where your at. Even if i was to shift at 4900 max which usually its lower since 4500-5000rpm is crap anyway with stock cam, its showing i hit 47,000rpm. Now granted generally im going to be shifting at more like 4600rpm that put its at 44,244rpm which seems fairly safe. Does anyone know how close i can get to the max rpm and be safe. I have no interest in blowing it up but if somone with more knowledge then i can tell me what would be safe itd be greatly appreciated.

mdvaldosta · September 25th, 2006, 10:05 AM

You've got a 2.87 pulley and your belts not slipping like crazy? You got an 8 rib kit? How much boost are you seeing? PS - 4600 rpm is way too low to shift, your loosing out on alot of power having to drop to like 2500 rpm between shifts. Even with the non-PI setup you'd be better off going to at least 5,500 rpm. Do you have a dyno sheet?

Drgnracin72 · September 25th, 2006, 12:08 PM

i think he has a v6

97TunedMustang · September 25th, 2006, 08:06 PM

Yes it is a v6 and its not slipping, its a 6 rib. I hit max 6.5 lbs of boost driving. revving, it will go to 7lbs or maybe a little over. i dont have any dyno sheet. never been dynoed

September 25th, 2006, 12:14 AM	#1
97TunedMustang Enthusiast Join Date: Jan 2006 Posts: 965 iTrader: 0 reviews	Vortech Supercharger, Whats A Safe Pulley Size... Ive replaced the stock pulley awhile ago with a 2.87 I however think i might be able to go one step lower. I would like to go with a 2.62. According to vortech i believe i read somewhere, the max rpm for the blower internally is 50,000rpm and there is a utility to calculate where your at. Even if i was to shift at 4900 max which usually its lower since 4500-5000rpm is crap anyway with stock cam, its showing i hit 47,000rpm. Now granted generally im going to be shifting at more like 4600rpm that put its at 44,244rpm which seems fairly safe. Does anyone know how close i can get to the max rpm and be safe. I have no interest in blowing it up but if somone with more knowledge then i can tell me what would be safe itd be greatly appreciated. __________________ 95 Civic Ex, FnF1's, Morimoto Mini h1 retrofit, GSR, bbk intake, BDL tb, 57trim t3/t4 8psi, 297whp 96 Civic Ex 2dr, G3 HID retrofit, FnF type 1's, Si cluster, Obd1 Z6 swap

September 25th, 2006, 12:08 PM	#3
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	i think he has a v6 __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

September 25th, 2006, 08:06 PM	#4
97TunedMustang Enthusiast Join Date: Jan 2006 Posts: 965 iTrader: 0 reviews	Yes it is a v6 and its not slipping, its a 6 rib. I hit max 6.5 lbs of boost driving. revving, it will go to 7lbs or maybe a little over. i dont have any dyno sheet. never been dynoed __________________ 95 Civic Ex, FnF1's, Morimoto Mini h1 retrofit, GSR, bbk intake, BDL tb, 57trim t3/t4 8psi, 297whp 96 Civic Ex 2dr, G3 HID retrofit, FnF type 1's, Si cluster, Obd1 Z6 swap

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September 25th, 2006, 10:05 AM	#2
mdvaldosta MM Fanatic 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,940 iTrader: 0 reviews	You've got a 2.87 pulley and your belts not slipping like crazy? You got an 8 rib kit? How much boost are you seeing? PS - 4600 rpm is way too low to shift, your loosing out on alot of power having to drop to like 2500 rpm between shifts. Even with the non-PI setup you'd be better off going to at least 5,500 rpm. Do you have a dyno sheet?

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