Probably been asked tons already but how can you tell if a sn-2000 has been upgraded or not. When I got it I was tol it can do from 10-12psi. Not sure if I was lied to or if it has been upgraded and don't wanna put it on and be overboostin it or anythin...don't know too much bout all this
Right off, if you don't have another Paxton sitting around to compare it to, stock will have straight impeller blades, upgraded will have helically curved blades.
F=MA
well to me they look slightly curved. any other way to tell or really just boltin it up and sin a boost gauge the only way to check it?
You could open up the back cover and look. It's really obvious. The blades are a tuliped reaction blade and the regular unit is a axial blade from root to tip.
F=MA
Plus..If upgraded or not unless it is a VR4 your not going to get 10-12psi. Probably a more realistic 7-9psi.
My SN93 has a curved impeller??
1993 Mustang LX
Reef Blue, 5spd, too much to list!
1993 Mustang GT SOLD :(
Powerdyne BD-11A w/9lb pulley,AOD->T-5 swap, MAC 1 5/8 shorties, MAC ProChamber, MAC catback,Pro 5.0 shifter, stock 3.27's, SPEC Stage II,and all else stock!
12.774@111.147 with a 1.90 60ft on Nittos and 3000 rpm launch :)
Left on this picture is the improved and to the right the stock impeller.
http://smg.photobucket.com/albums/v1...Anch=imgAnch19
Greets, Marco
'91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
*VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw
so I have to open up the case to find out? It won't mess it up if I do that will it and are they always the purplish color if its been upgraded? I'd hate to screw it up if its been upgraded to vr4 and if it hasn't I'd like to do that down the road. What # injectors do I run for 8psi and then if I upgrade do I need to run higher for 10-12psi?
I felt the impeller blades through the hole in the back and it feels like they are shaped like a wave and facing in towards the blade in front of it. does that mean it has the vr4 mod?
Does not sound like a VR4. Take pictures and we can verify. I am not in town yet to post pictures myself till tomorrow evening. The VR4 impeller has 15-20 blades and looks like a impeller off a jet aircraft engine.
I found this pic somewhere in my travels a few weeks ago!! The VR4 looks CRAZY...!Originally Posted by speedytang
1993 Mustang LX
Reef Blue, 5spd, too much to list!
1993 Mustang GT SOLD :(
Powerdyne BD-11A w/9lb pulley,AOD->T-5 swap, MAC 1 5/8 shorties, MAC ProChamber, MAC catback,Pro 5.0 shifter, stock 3.27's, SPEC Stage II,and all else stock!
12.774@111.147 with a 1.90 60ft on Nittos and 3000 rpm launch :)
Thanks DSBLK93GT
ok well it looks nothin like the one DSBLK93GT posted but it does look like the one F=MA posted. the purple color one he has posted looks like the one w/ the really curved veins but it isn't purple. I'll try to get some pics but wut is the one he has if not a vr4? just upgraded for more boost??
No problem!
1993 Mustang LX
Reef Blue, 5spd, too much to list!
1993 Mustang GT SOLD :(
Powerdyne BD-11A w/9lb pulley,AOD->T-5 swap, MAC 1 5/8 shorties, MAC ProChamber, MAC catback,Pro 5.0 shifter, stock 3.27's, SPEC Stage II,and all else stock!
12.774@111.147 with a 1.90 60ft on Nittos and 3000 rpm launch :)
I do not know alot on these but from what I have read there is an upgraded impeller that fits in the SN-93 housing that provides a little more CFM abd boost vs. the stock impeller. In order to upgrade to the VR4 it requires a different volute (rear section of the SC).
1993 Mustang LX
Reef Blue, 5spd, too much to list!
1993 Mustang GT SOLD :(
Powerdyne BD-11A w/9lb pulley,AOD->T-5 swap, MAC 1 5/8 shorties, MAC ProChamber, MAC catback,Pro 5.0 shifter, stock 3.27's, SPEC Stage II,and all else stock!
12.774@111.147 with a 1.90 60ft on Nittos and 3000 rpm launch :)
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