1.8 16V G0 or 2.1 16V G60 or...?

[Paulcorrado 10]

I am in need of some help.

 

I have a 1991 G60 Corrado which I have just melted cylinder 1 piston. I have been thinking of a 16vG60 conversion but a 1.8, 1.9, 2.0 or 2.1?

 

Does anyone have any experience with the higher cc engine's? Can the supercharger create that much boost to cope with a 2.1 even with a 65mm pulley?

 

I have a tsr pack A 16V head in my garage with some ABF cams. My aim is 300 BHP, is this too optimistic?

 

Cheers, Paul

[Yandards 0]

If I did it all again then I would go down the 2l ABF route, good block and it has all the sensors required for highly effective engine mapping.

 

Charger ok with larger displacement blocks, 300bhp is achievable but 250bhp is a much better aiming mark without spending too much.

 

Stacked headgaskets will also work, sounds very ghetto modification but has been proven to be highly reliable.

[VR6 0]

I am sure Yan will correct me if I am wrong .... but I think the conversion is a complete pain in the balls? If you did have to 'do it all over again' Yan ... would you?

[Paulcorrado 10]

Thanks for the info guys.

 

I have decided on a 2.1 16V G60 using an ABF bottem end, KR head (bigger valves I think???) with ABF cams (less overlap???) and 1Y deisel crank. I think this will give me 2044cc.

 

I dont know if I should use the diesel crank as Ive heard it doesnt rev, should I increase the bore? I want the engine to rev to 8K+. It will be on stand alone management.

 

Any ideas/help would be great.

[Yandards 0]

I am sure Yan will correct me if I am wrong .... but I think the conversion is a complete pain in the balls? If you did have to 'do it all over again' Yan ... would you?

 

I mostly have already, its version 2 of the base block I am on now post bore honing etc.

 

Paul, stick with a stock ABF across the board, its a very capable block and only light breathing mods (inlet and exhaust) coupled with megasquirt see the ABF kick out around 170bhp with a good wide torque band, if you want the extra revs then the diesel crank won't help. The KR exhaust valve is only sligtly larger than the ABF unit at 98.25mm vs 97.95, again for the faff involved I would stick with the ABF unit. As for cams again a supercharged lump needs a more specialised cam (you don't want a lot of valve overlap as it wastes the high flow low pressure boost) but once again the factory ABF cam is a very good starting point.

 

As for the 8k, a stock ABF should be able to handle that figure without too much difficulty but I would consider the relative charger speed at 8k (are you going with a stock sized charger pulley or smaller?) I would recommend that if you are going to the 8k point a dynamic balance of the piston, conrods, crank and flywheel will be very beneficial along with a decent sized oil cooler.

 

Overall most of the work is getting the pulley alignment and belt tensioning routing to a good point, I believe an ABF is much easier in this regard as a lot of it already lines up without the need for spacers etc.