S-Trim/High CR question

97markja

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I have a 4v B-head, right at 11:1 CR diamond pistons .020 over, upgraded pins, h beam rods, kellog crank, fr500 cams timed for SC, 10% IW balancer. The SC is a V2 s trim. The car is set up for E85 with 80lb injectors.
The question is how much power will the combo make and is the s trim going to run out of steam.
I was thinking about upgrading to a t trim simply for the air flow.
 

I8URLS1

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The Si trim is a great upgrade too, you can get it done through superchargersonline for $270 I believe and it will support close to what a T trim will
 

98 Saleen Cobra

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It'll make good power and depending on how hard you spin the S-trim it'll run out of steam..
 

97markja

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Thanks guys, I looked at surcharges online as well as 928 motorsports.. And vortech of course.
The car is an automatic, built 4r70w with circle d triple disc 3500 stall and 3.73 gear.
I'm just waiting on heads to be completed.
Any estimates on power?
 

I8URLS1

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The superchargers online upgrade is still done by vortech, it is just cheaper
 

dwtjr3

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52,200?!?! lol hows the motor still together?

Lol I know what you meant, but y only 5200?
 

pacific4v

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Sounds like an identical setup as mine except my s-trim has the si-trim upgrade and I'm using a procharger intercooler. I made 515/505 @ 5600rpm @ 9.5psi, 18° timing. Maf pegged at 5600rpm. It'll be going back to get tuned soon. I think it'll be s little over 600rwhp at around 12-13psi and more timing.
 

97markja

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52,200?!?! lol hows the motor still together?

Lol I know what you meant, but y only 5200?

Lol... Blower speed, calculated on a 6200 shift. Which would be more like 6500 once the shift executes.
That the 8 rib pulley I have now and that would be the max I would go.
 

97markja

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Sounds like an identical setup as mine except my s-trim has the si-trim upgrade and I'm using a procharger intercooler. I made 515/505 @ 5600rpm @ 9.5psi, 18° timing. Maf pegged at 5600rpm. It'll be going back to get tuned soon. I think it'll be s little over 600rwhp at around 12-13psi and more timing.

I'm looking for 600+ to the rear wheels. This is my first mod motor build and its been a learning experience. Not just for me but for my wallet as well.
I could have built 3 push rod motors by now!
 

I8URLS1

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That car looks great, I like everything except the hood personally but that's a nice looking Lincoln
 

Stanger00

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Lol... Blower speed, calculated on a 6200 shift. Which would be more like 6500 once the shift executes.
That the 8 rib pulley I have now and that would be the max I would go.

We have my shifts commanded at 5800 and shift does not happen till 6800+. Wheelspin kills it. You may also have ECU issues. My processor overloads and resets at 7k rpms when my car shifts.

I have a 3.1 pulley with 10% overdrive and make 16psi at 7k rpms. But it is a Si trim it only cost 500 and change to have new seals, bearings and impeller upgraded from the V2 S trim. If my 2 valve made 600 with pump gas timing than your B head should as well without a problem.

Edit: you are running a lot of compression and will be running better fuel. 600 for sure if you run that pulley combo.
 
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98 Saleen Cobra

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If you're spinning the S-trim that hard, that car will make insane power.. I'll guess in the 650 range atleast.
 

97markja

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That car looks great, I like everything except the hood personally but that's a nice looking Lincoln

Thanks! I fab'd everything myself, the goal was a termi style hood; when I did the mold I got the lines a little sharp but it looks good in person
 

97markja

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We have my shifts commanded at 5800 and shift does not happen till 6800+. Wheelspin kills it. You may also have ECU issues. My processor overloads and resets at 7k rpms when my car shifts.

I have a 3.1 pulley with 10% overdrive and make 16psi at 7k rpms. But it is a Si trim it only cost 500 and change to have new seals, bearings and impeller upgraded from the V2 S trim. If my 2 valve made 600 with pump gas timing than your B head should as well without a problem.


Edit: you are running a lot of compression and will be running better fuel. 600 for sure if you run that pulley combo.

An impeller wheel upgrade and one step larger on the pulley would probably be the safe route.
 

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