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GT40 all the things!
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Discussion Starter · #1 ·
So I am planning on gathering parts and start building this winter. Been working on a couple things so far.

Current setup:
M45
6.5" crank pulley
2.6" blower pulley
ZX2 cams
COP
SVT airbox
OBX header/catback
FC cam gears
E85



List of plans:
Head milled and mildly ported
Larger valves
Replace the M45 with a mildly ported M62
Smaller sc pulley (offset is different for the GM M62, undecided on size)
Aluminum flywheel and clutch (undecided on clutch)
SVT rods (undecided on pistons)
W/M or N2O (DD, but will rarely see high boost)
Tube arms (built by me)
Traction bars (built by me)


Now this is what I have so far

Brand new aluminum flywheel


SVT rods and pistons with new rings and bearings installed


And an M62 off a 95 Riviera


The blower is getting stripped down and cut up to fit the JRSC throttle body plate. Will be replacing the bearings, coupling, and seals.

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GT40 all the things!
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Discussion Starter · #2 ·
This is being copied from somewhere else so bear with me.
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GT40 all the things!
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Discussion Starter · #3 ·
This is what is done so far.





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GT40 all the things!
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Discussion Starter · #4 ·
Down to the rotor bearings. Can't cut anymore off.


I can save about .5" by keeping the GM pulley because of the offset.


The case is still 1.75" longer than my M45. I need things to match up for the bypass valve you can see here.



I should be able to move the assembly toward the belt the other .25" or so. There is plenty of mounting surface on the manifold.
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GT40 all the things!
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Discussion Starter · #5 ·


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GT40 all the things!
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Discussion Starter · #6 ·

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GT40 all the things!
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Discussion Starter · #9 ·
Hell no. That wouldn't be custom. I am planning on replacing the whole diff.
 

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Shot me 3 deer!!!
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looks like you got your work cut out for you!
 

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GT40 all the things!
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Discussion Starter · #11 ·
Yes sir. My plan is to have the blower on for FF. Then I'll rebuild it.
 

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GT40 all the things!
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Discussion Starter · #12 ·
I am so close, yet its the little things I need to clearance now. I've had it in and out at least a dozen times.
 

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Have you looked to see what kind of TQ it takes to turn that SC to 7000 and if it is safe to take that SC to 7000 on the SVT , Each SC has a limit or a safe RPM

That looks like the V6 3.8 SC ? does the math RPM come out right to work? Didnt some one years back try this SC ?

Tom
 

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GT40 all the things!
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Discussion Starter · #14 ·
I have no idea. My long term goal is higher compression, less boost, and more efficient boost. I have not done the math to see what pulleys I am going to need for x amount of boost. I don't want any more than 10psi.
 

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Shot me 3 deer!!!
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supercharger redline is 14000 rpm.

if ur using a 6.5 inch pulley and a 2.6 inch pulley, at focus redline, ur talking 17500 rpm for the blower. i think the bbk for the riviera puts it at 14000 rpm. also, thats a gen 3 blower and efficiency is down on them.
 

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GT40 all the things!
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Discussion Starter · #16 ·
I am wanting to swap to a smaller crank pulley, but like I said I haven't done the math. I think the 3.8s had a 6.9" crank pulley. This one is off a 95 so it has the better M62 and a 2.85" sc pulley. And I realize the Gen3s are less efficient its more efficient than the M45.
 

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GT40 all the things!
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Discussion Starter · #18 ·
SVT stuff? You mean the rods/pistons? I already had them. I am aware of the problem you had with them Jeff and I will be taking that into account if I upgrade pistons. And since I am wanting to increase compression, It will actually help me out.
 

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Yeah was referring to the rods and pistons. Didnt realize you already had them. Yes it will work out in your favor for increased compression. Just dont want anyone to go through the crap i did. Still interested in the outcome of your build.
 

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GT40 all the things!
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Discussion Starter · #20 ·
Well I got her in and hooked up minus the bypass valve. I blocked it off and started it. I had to keep revving it to keep it in boost without the bypass. And it sounded bad. I knew the coupler was bad, but not this bad. Looks like its gonna need a rebuild before attempting to run it and no time before FF.
 
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