MN12Racing
Registered User
I'm not exactly new, nor am I technically an SC owner. I've got a 12sec XR7, but it's N/A. However, I've been up to my eyeballs in MN12s for 8 years now, and know this is the place I need to go for this information. Some may know me, some may not, it's been 8 months since my last post, but I digress...
My dilema; the 1996 Jaguar XJR. It's my new daily, it's already got 322bhp, and it is a pig. It's fed by a slightly proprietary snub-nosed M90 (The DB7 and the XJR share an engine). I'm thinking of coaxing it up to the 400hp mark of its contemporaries, but I've run into some problems:
-The OE pulley diameter is between 2.5~2.75" across the ribs (tuff to get my calipers on it). From all I've read, I cant buy smaller pulleys.
-Crank pulley UD kits are $800 (400 BP plush shipping across the Atlantic)
-Spinning it faster may be too much for it. It's blowing 322hp worth of air now, at what point does the M90 become a glorified heat pump?
So, what I'm looking for is:
-Pulleys smaller then mine
-Info/guides on porting
-anything else within the blower that will help it blow.
On a side note, keep your eyes on Junk yards for 1995-1997 Jaguar XJRs. They have tiny pulies and blower tops that will likely fit SCs. They've got liquid/air intercoolers, too, but I'm not sure how you'd make that work.
Thanks in advance!
Eric
My dilema; the 1996 Jaguar XJR. It's my new daily, it's already got 322bhp, and it is a pig. It's fed by a slightly proprietary snub-nosed M90 (The DB7 and the XJR share an engine). I'm thinking of coaxing it up to the 400hp mark of its contemporaries, but I've run into some problems:
-The OE pulley diameter is between 2.5~2.75" across the ribs (tuff to get my calipers on it). From all I've read, I cant buy smaller pulleys.
-Crank pulley UD kits are $800 (400 BP plush shipping across the Atlantic)
-Spinning it faster may be too much for it. It's blowing 322hp worth of air now, at what point does the M90 become a glorified heat pump?
So, what I'm looking for is:
-Pulleys smaller then mine
-Info/guides on porting
-anything else within the blower that will help it blow.
On a side note, keep your eyes on Junk yards for 1995-1997 Jaguar XJRs. They have tiny pulies and blower tops that will likely fit SCs. They've got liquid/air intercoolers, too, but I'm not sure how you'd make that work.
Thanks in advance!
Eric