By herky on Tuesday, April 24, 2001 - 06:10 pm: Edit

Has anyone considered or done the 4.6 pistons in their 4.0? my motor is still fresh but this sounds like a good idea down the road, maybe some of the guys in the uk could help on this one. Would you get good gains from just the pistons? opinions...........

By Gabe R on Tuesday, April 24, 2001 - 06:31 pm: Edit

If your 4.0 is a Gems type, I beleive you will not get any gain since you'll still be limiting the amount of air and gas flowing into the chambers... I'm just guessing though from info obtained at www.rpiv8.com

Try that link to read about how to get more out of your 4.0...
Good luck
GABE

By herky on Tuesday, April 24, 2001 - 08:21 pm: Edit

I am real new to your world, what is the gems? my rig is a 2k disco2 with 4.0 petrol. does this help?

By Ron on Wednesday, April 25, 2001 - 09:04 am: Edit

I think the pistons are the same or very similar. 4.6 is a stroked 4.0 ie they have the same bore. Word is that you can't just stroke a 4.0 easily, you have to buy a 4.6 block and do it that way.

Ron

By ds on Wednesday, April 25, 2001 - 09:19 am: Edit

if you have a 4.0 motor and install 4.6 pistons and don't change anything else your compression ratio will drop and you won't have any power.