sn 2000

[speedytang]

crazyhorse88, A 3.75" pulley on the supercharger will gain 2psi and should put you at 8psi. The air temperature should still be ok but you need enough fuel volumn to keep up. I don't remember your fuel pump size but a 255lph will be ok or if you have a 190lph or smaller get a secondary pump but dropping the tank and installing the 255lph is much cheaper. Just make sure you change your fluid every 3000 miles and if you do to the track I always change my fluid when I am done or every 1500 miles. Type 'F' is cheap so change often and you will keep the small internal shaft alive for a long time.

[mani]

yes i have a mass air thats off a 93 cobra and its cali for 24 pound injectors

[Crazyhorse88]

Nice I have a botle of paxtrac fluid I am going to use along with my 255 fuel pump, with gt-40 intake, edelbrock heads(out of the box) 1.7 rr, 65mm tB, 73mass air, stock cam and lower with 8psi 24#injectors and fmu for 24#s and msd 6btm, where should I be HP ? 1/4? with drag radials I know its hard to say based on every car and driver is diffrent but I just wanted to get a general idea, Thanks so much!

[speedytang]

mani, You need to ask some questions in the general question section of this board because I was thinking the MASS on a Cobra was 19lb calibrated and the Cobra computer makes it think it is 24lb. If so of course your are running rich and costing power that way also

[speedytang]

crazyhorse88, I would guess 108-110 mph. 13.20 1/4

[mani]

well the mass air looks bigger then the other stock one and the mec sais that the black board that srews on to it is for 24 pound injectors

[Crazyhorse88]

Wow I was thinking alot faster than that! I ran low 14s with gears and exhaust! I since did heads, intake,headers,injectors,fuel pump,roller rockers, and supercharger! if this charger dont get me in the low 12s I am planning on a 14# procharger, do you think that the charger would be holding back the 1/4mile times or something else? Thanks

[speedytang]

Get 42lb injectors ,trash the FMU, trash BTM and get a tuning system. (PMS,Tweecer Etc.)

Then I think you would be close to the lower 12's with 8psi.

[mani]

crazy horse a car thats in the 108 -112 is in the 12s it all about how you hookup thats the most important if you have a tire then i guarantee 12.30 to 12.90 if you can keep your 60 foot under 1.9 atleast

[Qkhorse]

wow this is great, to see some #'s and combs for the sn blowers. I have an sn2000 with upgraded impellar and the tranny cooler system. I ran last year at the local drag strip and got 12.3 @ 109mph 1.71 60' at 5lbs boost. (missfire issues) anyways i have a little gadget i picked up from a guy on here that allows me to change my fmu ratio, without changing disc. It works great. I have a 3.75 pulley sitting on my shelf since it over turned my sn93 i had and burned it out.

Q's 1 : can i use the 3.75 with the new sn2000 i have with out any probelms.

Q's 2: what f-150 crank pulleys are people use. (the 7" one) i keep reading about.

[speedytang]

The F150 you see mentioned is for the Novi 1000 single belt units not for us dual belt guys. 3.75" you should be ok just keep your engine RPM below 6000.

[outrageous306]

hey, im new with the whole supercharger setup. i have a 90 foxbody with pretty worked 306. i go 12.60 with a 60 ft at 1.7 i bought an sn2000 off a friend who just had it rebuilt with an impeller upgrade. i was just wondering if anyone could give an estimate on what my 1/4# would be. since last run i have changed my gears from 3.27 to 3.73 thanks

[speedytang]

You usually can count on a 50% increase at the crank with a Sn2000 if it has the Mod2 Impeller.