ALFAGTV6.COM

IAN TT · Post by **IAN TT** » Wed Feb 28, 2007 5:11 am

I am building a 2.5 litre full house performance motor for motorsport. I want to fit high compression pistons but the motor must run on pump fuel (98 ron)as this will be a rally car.

What compression should the pistons be?
What is the best brand of pistons to use?
Who sells them?

What sort of horse power will I get out of a 2.5 litre using 'rally cams', not wild track cams?

Greg Gordon · Post by **Greg Gordon** » Wed Feb 28, 2007 5:40 am

You might want to contact Vick Autosports. They run a 2.5 GTV6 race car. It has about 185hp at the wheels with their own design cams which they sell, about 10.5:1 compression, head work and SDS fuel injection.

Greg

IAN TT · Post by **IAN TT** » Wed Feb 28, 2007 7:41 am

I looked at their website. Their catalogue doesn't list any high comp pistons for the 2.5 but I have sent them an email anyway. Any other suppliers? Or would some of those motorbike pistons everyone talks about be suitable?

Greg Gordon · Post by **Greg Gordon** » Wed Feb 28, 2007 7:46 am

Vick is pretty bad about having the stuff they actually have in the catalog. You just have to call them and talk to Csaba as he built the car. They actually had a batch of cams made to the exact max allowable spec for the series they race in. They are "race cams" but by race standards they are pretty mild, should be great on a stree/track car. I am very impressed with the power they got without going crazy with compression, cams, headers etc. It's all fairly mellow stuff.

Greg

IAN TT · Post by **IAN TT** » Wed Feb 28, 2007 5:46 pm

Vick Autosports got back to me very promptly which was pretty impressive. They use 10.1 89mm pistons in their race car but I have to use 88mm pistons which they don't have.

Anyone got any other sources for these items.

Ian

Post by **Zamani** » Wed Feb 28, 2007 8:29 pm

Have you tried Beninca? They use ROSS pistons I think.

Paulspruell.com has 10:1 pistons for the 2.5 V6.

What I would look into is a set of quality rods and lightweight pistons.

Greg Gordon · Post by **Greg Gordon** » Thu Mar 01, 2007 7:57 am

I would call Vick and say "look, I know you guys have those pistons made to order, so get me a set in my desired bore size!" It usually helps to talk to Csaba.

scott.venables · Post by **scott.venables** » Fri Mar 02, 2007 2:42 am

What about Vin Sharp of PACE Engineering in Park Orchards??

Sporttunergtv6 · Post by **Sporttunergtv6** » Fri Mar 02, 2007 8:09 am

spruell can even get you 11:1 if you want them
v

IAN TT · Post by **IAN TT** » Sun Mar 04, 2007 3:32 am

I have talked to Vin at Pace and to Benincas. They can get pistons made for me but they have a lead time of over two months so I thought that other sources might be quicker and just as good quality.

Ian

SydneyJules · Post by **SydneyJules** » Sun Mar 04, 2007 5:46 am

Check out my specs mate.

In the time you wait for pistons, you will have plenty of balancing, forging, lightening, porting, and other shit to do.

I was lucky, and just had the thing rebuilt and fit up

tImBoWe · Post by **tImBoWe** » Sun Mar 04, 2007 11:07 pm

I have got stuff from Paul Spreull a couple of times. Great selection. Heaps of knowledge.

gday · Post by **gday** » Thu Mar 08, 2007 10:44 am

Maybe you should try calling Venolia directly. I would think they have some standard piston designs on file for the 2.5l. I had a set of pistons made for a 2l fiat a few years ago, and they were very helpfull.

2.5 Litre Pistons