985cc Turbocharged Nova Sprint Car

probably your cheapest fix is to get your existing engine rebuilt, and lower the boost a tad.

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Originally Posted by novarally

Where do you draw the line?

You could bolt an engine in the front, one in the back, 4WD, turbo and supercharger on both of them.........it's endless.

And that's the problem, it is literally a bottomless pit of spending if you want to be competitive in any form of motorsport. There is simply no such thing as cheap, someone else is always willing, and able, to spend more than you can.

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The xtrac puma is a pretty good example of that, figures for the cost if xtrac charged labour etc on the bits they did is something mad like 1.5million iirc?

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Originally Posted by mowgli

probably your cheapest fix is to get your existing engine rebuilt, and lower the boost a tad.

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Probably true, but I was only putting 18psi through it, the problem is that the bottom end was standard, and just not able to cope with the boost/revs being thrown at it.

If I want to go forward and compete on level terms with the quick guys, it definitely needs forged pistons as a minimum, and preferably steel crank and rods too.

Sticking with the up to 1400 Class is still my preferred option, but it will all boil down to cost in the end.

I'm meeting with the Parts Manager at my local Vauxhall dealer tomorrow, I'm hoping he can find out more for me about the Brazilian 1.0 OHC engine to see if that is a realistic option.

colin i think you should rebuild your bottom end as is and then go for a 16v head. i know this mean a new or modifying the inlet and exhaust manifolds but the gains could be worth it

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Originally Posted by novarally

Or I am now (vaguely) considering a very high powered LET for it, again just for fun.

A really big power LET would almost certainly cost less than building a 1.0 turbo, and would offer a lot of smiles.

So I've spent the last hour or more trawling through old 'Cars For Sale' adverts to see what is (and was) around.

Something like the green TOTB Corsa that Chris S from Sheffield had would have made an ideal donor car!

It was registered as J60 OST, but I have a feeling that car got sold?

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the car is still owned by chris it has xe in it now till his new engine built i think well it was running one at pvs. dave dixson has his old turbo and manifold for his nova

If you're going to stay as 1ltr turbo still, and go for a steel bottom end would it be worth while destroking a 1.3/1.4 rather than sleeveing a block so that it's a revvier lump?

And also having a bigger bore will give you more room for bigger valve area!

the 12ST has the lowest stroke of any stock gm engine. by going lower on the stroke, you would need a bespoke crank and still need forged pistons..

as the car was built using mini metro pistons, there is a really good probability that someone somewhere does forged pistons already for it, so they will cost less to obtain.

there are alread valve cutouts in the block that don't appear to affect the running

I think you should keep it within the 1.0L bracket - It's part of what makes this car unique.

Hold out for the brazilian lump then go to town on it.

I agree tbh, shame you cant write the rest of the season off then spend all year/winter soucring the parts and rebuilding.

The car is/was obviously very competitive in that class as it won it a few times iirc!