Coscast RV8 Block

[AntonyJ]

Does anyone know anything about these blocks?
Are they still made?

Spoke to Cosworth and they say Coscast doesnt exist as it did.


Are these a better bet than a top hat lined block?

[AntonyJ]

rev-erend said:

AntonyJ said:

Are these a better bet than a top hat lined block?

You need to talk with an expert engine builder for that ..

I think top hat liners are a 'paid for' extra in that they offer better block location - the extra surface area can push against the head and not move .. compare to a conventional liner.

I think it's normally offers on the bigger sizes like 5.3 but an engine builder will tell you.

But they also offer a good repair to a "cracked" block ?

[AntonyJ]

See , this is my thought.
Power have those "cosworth" (sure thats how they described them in Sprint), for about £1000.

Top hat liners are £800 fitted, but then I would need new cam bearing aswell.

See where this is going? New "re-designed" block for £1000 (maybe less)

Or old seasoned block with top hats, new cam bearing for about £1000........

[AntonyJ]

Boosted LS1 said:

Or an old seasoned block with a known history, no faults, without the need for top hats could be used.

Got any??? lol

[AntonyJ]

Saw that one Andy, but I want a crossbolted 2.5".

[AntonyJ]

Boosted LS1 said:

Following a phone call last night this engine can be sold. Basically it's a 4.5, 2.5" mains crossbolted engine with the late pistons and rods. It was dismantled and the rods were balanced end to end etc before the crank was dynamically balanced. It has an intermediate front cover which accepts a dizzy and there's the 'G' rotor crank driven oil pump. The heads are nicely ported, overhauled etc and in good condition. I don't know who did the porting but it's professional. I think the valves may be a tad oversized but can't remember. I don't think they are tvr big valve heads though. It will have a new aftermarket cam installed maybe a 218. Inlet manifold, rocker covers and plenum are freshly painted green with the raised enges polished. There's also a fuel rail, injectors, a rover loom, a maf meter and a vitesse ecu? The main and big end shells were new as well. The engine had the bores oiled a year or so ago and then it was 'bagged up'. It may be an idea to lift the heads and sell the engine with them off. Oh, iirc it's got a head stud kit installed and may have studded mains as well.

YHM