‘78 6200M-TT LS3 Twin Turbo

[v8sag]

StewB_v6 said:

I’ve used the Nissan outer joints & 930 CVs on the inners. I had the shafts custom made to suit which were copied from OE parts for spline detail. I’ve used Nissan hubs in the front too so it’s 5x114 all around.

Thanks, that inspires me with a little confidence if I take a similar route if dss don't come through. Can you remember if the outer CV is 28 splined? I pulled the caps of some gtr axles I have and the outer's are 28 spline. I could get by with some slightly overlength half shafts (3 inch long splines) and cut to size. Pity the gtr axles are unequal, otherwise adapter plate to the diff output, job done.

I'm going to take a stab at your power output based on recipe's for 6.2 LSA piston compression, assuming you're not over 14psi. 600 to 670hp at the hubs?

Sorry for all the questions, not too many boosted 6.2 LS gtr hub 'ed TVR folks around!

[StewB_v6]

I honestly can’t remember the details of the shaft ends as they were always intended just to copy & reuse the ends. I’ll have a nosey through my notes to see if Inhavr any further details (it’s over 4 years ago now!)

I never got as far as 14psi as we had gearbox issues (it was a used T56 which we did no favours by running in 5th due to traction issues). It’s 8psi below 5k & 11psi above which gives the sorts of numbers you mention. The turbos are small which will limit the top end ultimately but the flip side is that it’s making boost at 1200rpm which makes it much more like a PD blower which was what I was going for as spiky turbo power delivery with a short, snappy, lightweight traction limited car seemed like a recipe for disaster.

Stew

[v8sag]

Cool, I think you made the right choice with the 28's, you should have good lineal delivery and drivability. I was taking a similar route with small twin g30 660; s (as they offered reverse rotation housings) on a lsa 3/4 engine, but don't have your lovely M wide open engine bay. Heat soak, packaging and the LSA pistons not liking big boost, swayed me back to the supercharger.

[StewB_v6]

The LS2 I had was supercharged but it would have meant tunnel ramming the bonnet & I really wanted to keep the body stock including arches etc which limits rear tyre size to 245 section.




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[StewB_v6]

Some wheel diameter & offset assessments…the OD of the larger wheel & tyre in the pics is basically the same OD as the original 185VR14 that were OE fitment. The wheel & tyre combo I ended up with also has the same OD.

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