How hard is it to find good used 951 pistons?
05-05-2006, 10:49 AM
#18
Race Car
I hope the OP understands how hard it is to find tolerance group 2 pistons.
99.something% of 951 engines came with tolerance group 1. If the factory made a mistake, then they used tolerance group 0 or tolerance group 2 pistons.
When I called around, new ones were ~$200/each.
99.something% of 951 engines came with tolerance group 1. If the factory made a mistake, then they used tolerance group 0 or tolerance group 2 pistons.
When I called around, new ones were ~$200/each.
05-05-2006, 02:11 PM
#19
Rennlist Member
Thread Starter
I think OP stands for Original Poster, so I guess thats me.
I was aware that tolerance 2 was difficult to find - thats why I just used my original pistons and coated them side and top for my 5.0L engine build. I wanted the thicker crown that goes with the 87 pistons, but had to use my 89s because I couldn't even get a line on 87s.
For Blitzen, bdellis - what tolerance are they?
Thanks PK.
I was aware that tolerance 2 was difficult to find - thats why I just used my original pistons and coated them side and top for my 5.0L engine build. I wanted the thicker crown that goes with the 87 pistons, but had to use my 89s because I couldn't even get a line on 87s.
For Blitzen, bdellis - what tolerance are they?
Thanks PK.
05-05-2006, 02:17 PM
#20
Rennlist Member
Thread Starter
Originalsterm -
While that is a perfect idea, the issue with having the block nikasiled is that THEN I don't have to buy Porsche pistons. I can have JE make a set for 1200 or so dollars (a set of 8 for my V-8) in a good forged aluminum (or arias I guess).
The only reason for a 928 guy to use 951 pistons (and many have) is because they are forged, they are cheap (sometimes), and they will hold up to the boost relatively better then our cast stuff. The compression height is shorter though, by a few mms, and that may be solved by decking the block and heads down. Otherwise, a "plop them in scenario leads us to a bout a 7:1 compression ratio.
It funny that when you coat the skirts, they take most of the magic dust ferrous coating off ANYWAY.
Think that was what those guys over here were figuring out with the stock arias pistons coated on t he skirts with a PC-9 (swain tech) LIKE coating that also seemed to have some sort of metalic ferosity in it. To work with the ALUSIL block material.
Once I spend the 1800 or so for doing a block in nikasil, as I said, I no longer need to worry about any of that. And can run any custom piston design I wish.
While that is a perfect idea, the issue with having the block nikasiled is that THEN I don't have to buy Porsche pistons. I can have JE make a set for 1200 or so dollars (a set of 8 for my V-8) in a good forged aluminum (or arias I guess).
The only reason for a 928 guy to use 951 pistons (and many have) is because they are forged, they are cheap (sometimes), and they will hold up to the boost relatively better then our cast stuff. The compression height is shorter though, by a few mms, and that may be solved by decking the block and heads down. Otherwise, a "plop them in scenario leads us to a bout a 7:1 compression ratio.
It funny that when you coat the skirts, they take most of the magic dust ferrous coating off ANYWAY.
Think that was what those guys over here were figuring out with the stock arias pistons coated on t he skirts with a PC-9 (swain tech) LIKE coating that also seemed to have some sort of metalic ferosity in it. To work with the ALUSIL block material.
Once I spend the 1800 or so for doing a block in nikasil, as I said, I no longer need to worry about any of that. And can run any custom piston design I wish.
