Vacuum #'s with Crane 2031 cam????????

cojonepony · 03-18-2001, 10:50 AM

Will the 2031 pull enough vacuum to be used in a '94 GT? How many inches of vac. can I expect to get at idle, etc.?

withamc · 03-18-2001, 11:26 AM

I'm getting about 15 at idle.

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86 GT, GT40P heads, Crane 2031, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, Groundpounder subs and lower control arms, 277 RWHP. www.mustangworks.com/cgi-bin/moi-display.cgi?1537

macx · 03-18-2001, 02:51 PM

Being your setup is very similar to what I'm planning, couple more Q's. At what rpm does the motor "come on" or start pulling well (esp in 3rd or higher gear)? Also, at steady hiway cruise, say 75, what did this combo do to your mileage compared to stock with the same (or close) gears? Thanks!!

withamc · 03-18-2001, 09:44 PM

I used to get 21-22 mpg, mostly highway to and from work. After the cam install it dropped to about 19. How much of that is cam and how much is due to me sticking my foot in it more now that I've got more power to play with - who knows. It really kicks in around 3000, but the guy who dyno'd it complimented me on the fact that the torque curve is fairly flat from 1500 (268 ft/lbs) to 5500 (258 ft/lbs), where it starts dropping off. It peaks at 3500 (313 ft/lbs). I think some of that is due to the fact that I didn't go overboard on the TB, and the cam is a split duration (216 I/220 E) that helps keep the intake velocity up.

------------------
86 GT, GT40P heads, Crane 2031, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, Groundpounder subs and lower control arms, 277 RWHP. www.mustangworks.com/cgi-bin/moi-display.cgi?1537

03-18-2001, 10:50 AM	#1
cojonepony Registered Member Join Date: Feb 2000 Posts: 132	Vacuum #'s with Crane 2031 cam???????? Will the 2031 pull enough vacuum to be used in a '94 GT? How many inches of vac. can I expect to get at idle, etc.?

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03-18-2001, 11:26 AM	#2
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	I'm getting about 15 at idle. ------------------ 86 GT, GT40P heads, Crane 2031, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, Groundpounder subs and lower control arms, 277 RWHP. www.mustangworks.com/cgi-bin/moi-display.cgi?1537

03-18-2001, 02:51 PM	#3
macx Registered Member Join Date: Oct 1999 Location: Gordonville MO USA Posts: 448	Being your setup is very similar to what I'm planning, couple more Q's. At what rpm does the motor "come on" or start pulling well (esp in 3rd or higher gear)? Also, at steady hiway cruise, say 75, what did this combo do to your mileage compared to stock with the same (or close) gears? Thanks!!

03-18-2001, 09:44 PM	#4
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	I used to get 21-22 mpg, mostly highway to and from work. After the cam install it dropped to about 19. How much of that is cam and how much is due to me sticking my foot in it more now that I've got more power to play with - who knows. It really kicks in around 3000, but the guy who dyno'd it complimented me on the fact that the torque curve is fairly flat from 1500 (268 ft/lbs) to 5500 (258 ft/lbs), where it starts dropping off. It peaks at 3500 (313 ft/lbs). I think some of that is due to the fact that I didn't go overboard on the TB, and the cam is a split duration (216 I/220 E) that helps keep the intake velocity up. ------------------ 86 GT, GT40P heads, Crane 2031, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s, Groundpounder subs and lower control arms, 277 RWHP. www.mustangworks.com/cgi-bin/moi-display.cgi?1537