S52 + Vortech V-2 SQ Si-Trim Question

[mcoupemindy]

I'm specifically looking for responses from individuals who have:

• S52 Engine (Not S50, M50, M52)
• Vortech V-2 SQ Si-Trim Supercharger

Can you please help me out with the following information?:

• What pulley combination are you running?
• What boost levels are you seeing at redline?

Thank you in advance for your help!

Jonathan Thayer

[chikinhed]

I have a new Si-trim with the 6.00"/3.00" combo and all the mods noted in my signature and am seeing 13 psi, same as it was with the S-trim.

[black bnr32]

hey chikinhed, could you post info on your latest dyno?

[mcoupemindy]

I have a new Si-trim with the 6.00"/3.00" combo and all the mods noted in my signature and am seeing 13 psi, same as it was with the S-trim.

Thank you for the info! Where did you get the 3.00" pulley from? (Vortech jumps from 3.125 to 2.87)

Anyone else out there with info?

[jmargo]

6.3 in crank 3.33 SC pulley. 12.5 lbs at redline.

[mcoupemindy]

6.3 in crank 3.33 SC pulley. 12.5 lbs at redline.

Thanks!

[chikinhed]

hey chikinhed, could you post info on your latest dyno?

I did a couple of days ago.....

'New Si-trim dyno results'

Thank you for the info! Where did you get the 3.00" pulley from? (Vortech jumps from 3.125 to 2.87)

Anyone else out there with info?

I got it from another forum member....... custom!

[marc1119]

Jonathan....
www.aspracing.com
makes custom pullies for our cars..very nice..they cost $90-$95 each..any size you want....I had them make me a 2.90 for my V1 T trim....( always based off Ford Mustang pulley..if they ask)

Marco

[mcoupemindy]

Jonathan....
www.aspracing.com
makes custom pullies for our cars..very nice..they cost $90-$95 each..any size you want....I had them make me a 2.90 for my V1 T trim....( always based off Ford Mustang pulley..if they ask)

Marco

Thank you for the info Marco.

It just seems as if the blower isn't making enough boost with the 6.00 / 3.125 setup that I currently have on the car.

[marc1119]

Thank you for the info Marco.

It just seems as if the blower isn't making enough boost with the 6.00 / 3.125 setup that I currently have on the car.

How much boost are you making?

are you making 12-12.5 lb boost?

if not..is your belt slipping? BPV leaking? have another boost leak? have an inaccurate boost gauge?

[mcoupemindy]

How much boost are you making?

~11.5 PSI

Saw the boost gauge hit 12 once, however I hit the rev limiter too.

[ROHANs99M3]

I am thinking 15 but might be closer to 20 at 8K. s52 with RMS 2+ contact Chris Reese(thatdonfc) they just posted with their new two piece crank or Osh at RMS,

[marc1119]

~11.5 PSI

Saw the boost gauge hit 12 once, however I hit the rev limiter too.

that is probaly right...or very close....you spin at ~ 48,300 RPM at 7000 with your V2....~ 12 lb boost....

I spin my V1 at ~ 49,800 RPM and make ~ 12.5-13 max lb boost on a warm day....

There is no definitive data on how much boost you should make..just a ballpark...between flow vs backpressure...

as I said....If you see 12 at redline..that is probaly right or very very close...

you are looking for nothing.....

I am thinking 15 but might be closer to 20 at 8K. s52 with RMS 2+ contact Chris Reese(thatdonfc) they just posted with their new two piece crank or Osh at RMS,

Who is going to tune for that?? 20 lb boost at 8000 RPM?

[mcoupemindy]

I am thinking 15 but might be closer to 20 at 8K. s52 with RMS 2+ contact Chris Reese(thatdonfc) they just posted with their new two piece crank or Osh at RMS,

I'm looking at a compressor map right now and there's no way in hell that you'll make anywhere close to 20 psi with a V-2 Si.

If my math is correct, you'll max out at 16.9 psi overdriving the blower to 55k RPM.

that is probaly right...or very close....you spin at ~ 48,300 RPM at 7000 with your V2....~ 12 lb boost....

I spin my V1 at ~ 49,800 RPM and make ~ 12.5-13 max lb boost on a warm day....

There is no definitive data on how much boost you should make..just a ballpark...between flow vs backpressure...

as I said....If you see 12 at redline..that is probaly right or very very close...

you are looking for nothing.....

Thanks Marco. I guess I'm just OCD.

Car is running like a champ after the Bosch 040 fuel pump install. Still throwing the CEL due to fuel adaptation limits - just need to get it read to see if it's now overfueling.

[ROHANs99M3]

that is probaly right...or very close....you spin at ~ 48,300 RPM at 7000 with your V2....~ 12 lb boost....

I spin my V1 at ~ 49,800 RPM and make ~ 12.5-13 max lb boost on a warm day....

There is no definitive data on how much boost you should make..just a ballpark...between flow vs backpressure...

as I said....If you see 12 at redline..that is probaly right or very very close...

you are looking for nothing.....




Who is going to tune for that?? 20 lb boost at 8000 RPM?

Miller Performance I believe, OSH said he could do it, and I believe him, otherwise I will be calling, Nick, or Mike R. Marco, that is with the new engine. The Vortech site puts that pulley impeller speed at 51157.89, if I go to 8K it puts it at 56K, what actually happens I am not sure.

[marc1119]

Miller Performance I believe, OSH said he could do it, and I believe him, otherwise I will be calling, Nick, or Mike R. Marco, that is with the new engine. The Vortech site puts that pulley impeller speed at 51157.89, if I go to 8K it puts it at 56K, what actually happens I am not sure.

are you going to run a different form of engine mangement other than the factory ECM?.........

[ROHANs99M3]

are you going to run a different form of engine mangement other than the factory ECM?.........

No stock ECU. I heard most I can get is about 550 on stock ecu, if I get that I will be happy, but I am realistic if I can get 500 I will call it mission accomplished.

[marc1119]

No stock ECU. I heard most I can get is about 550 on stock ecu, if I get that I will be happy, but I am realistic if I can get 500 I will call it mission accomplished.

I didn't think Mike Radowski tuned OBD2 factory ECM's......
And AA will not do it....
As far as having anyone out your way doing it....keep us posted how that works out for you....

[djr48312]

I have a new Si-trim with the 6.00"/3.00" combo and all the mods noted in my signature and am seeing 13 psi, same as it was with the S-trim.

Your having to run a custom tune to allow the 80lb injectors and the S trim? What's the powerband of the schrick cams vs stock? Thanks. Were there there any other issues in your install? Can you show a pic of the supercharger and brackets?

[jmargo]

Your having to run a custom tune to allow the 80lb injectors and the S trim? What's the powerband of the schrick cams vs stock? Thanks. Were there there any other issues in your install? Can you show a pic of the supercharger and brackets?

This post is over 11 years old. I don't think anyone from this thread even run a SC anymore.