BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Probe SRS piston Cyl clearance

+2
gt350hr
Kobelco
6 posters

Go down

Probe SRS piston Cyl clearance Empty Probe SRS piston Cyl clearance

Post  Kobelco June 23rd 2021, 10:24 pm

Hello, I found some Probe SRS pistons stashed back side of my shop shelf. Purchased back in 2008'ish and not in the original box trying to figure out cyl clearance. Old catalog says "Tight running clearances" these are made from 2618-t61 Forged Aluminum I always ran 2618 pistons on looser side .004-.005 with my blower and methanol fuel setup.
Maybe it is the t61 to run them "tighter" ?
Anyone here have experience with Probe SRS pistons? Before they closed.

thanks for the help.

Kobelco

Posts : 51
Join date : 2019-02-21

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  gt350hr June 24th 2021, 12:20 pm

Reach out to member Mark O'Neal , he owned Probe.

gt350hr

Posts : 638
Join date : 2014-08-20
Location : Anaheim , CA

Kobelco likes this post

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  dfree383 June 24th 2021, 2:25 pm

He’s actually back in business
dfree383
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14448
Join date : 2009-07-09
Location : Home Wif Da Wife.....

Kobelco likes this post

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  rmcomprandy June 25th 2021, 11:13 am

dfree383 wrote:He’s actually back in business

As "Renegade" and Ross is making his pistons.

rmcomprandy

Posts : 5695
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Gregaust and Kobelco like this post

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  gt350hr June 25th 2021, 12:45 pm

Vigilante Performance. He also sells Racetec/Autotec pistons like you.

gt350hr

Posts : 638
Join date : 2014-08-20
Location : Anaheim , CA

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  rmcomprandy June 25th 2021, 5:38 pm

gt350hr wrote:  Vigilante Performance. He also sells Racetec/Autotec pistons like you.

Sorry Mark ...

YEA ... I was thinking of the wrong business name ... pretty much the same meaning as a synonym but, a totally different
word.

rmcomprandy

Posts : 5695
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  Mark O'Neal July 15th 2021, 3:47 am

rmcomprandy wrote:
dfree383 wrote:He’s actually back in business

As "Renegade" and Ross is making his pistons.

No. I don't know who Renegade is but it isn't me.

Mark O'Neal

Posts : 253
Join date : 2009-08-12

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  Mark O'Neal July 15th 2021, 3:53 am

gt350hr wrote:  Vigilante Performance. He also sells Racetec/Autotec pistons like you.

I also sell JE, Wiseco, and CP. Actually, I sell whatever fits the application.

And I never stopped doing business. I closed the plant, because a corporate owned company was selling pistons below cost to get rid of me. I know this because they told me. I'm not a 60 billion a year corporation and I'm not stupid. Therefore.......they wanted the lower cost market segment and now they have it. I also sold Coast High Performance because I didn't want to build motors anymore....hence Vigilante Performance. But I took up with a younger partner and we're heading back in that direction. So....here I go again.....

For the OP. The pistons have .004 built in at the gauge point, which is .500 from the bottom of the pistons. However, clearance depends on application, so it could need as much as .006.

Mark O'Neal

Posts : 253
Join date : 2009-08-12

Gregaust likes this post

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  SandHillsHillbilly July 15th 2021, 10:54 am

Mark O'Neal wrote:
gt350hr wrote:  Vigilante Performance. He also sells Racetec/Autotec pistons like you.

I also sell JE, Wiseco, and CP. Actually, I sell whatever fits the application.

And I never stopped doing business. I closed the plant, because a corporate owned company was selling pistons below cost to get rid of me. I know this because they told me. I'm not a 60 billion a year corporation and I'm not stupid. Therefore.......they wanted the lower cost market segment and now they have it. I also sold Coast High Performance because I didn't want to build motors anymore....hence Vigilante Performance. But I took up with a younger partner and we're heading back in that direction. So....here I go again.....

For the OP. The pistons have .004 built in at the gauge point, which is .500 from the bottom of the pistons. However, clearance depends on application, so it could need as much as .006.

Mark, What do you mewan built in?
SandHillsHillbilly
SandHillsHillbilly

Posts : 240
Join date : 2008-12-02
Age : 60
Location : South Carolina

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  gt350hr July 15th 2021, 1:16 pm

The pistons are .004 smaller diameter than the bore of the block at the measure point .

gt350hr

Posts : 638
Join date : 2014-08-20
Location : Anaheim , CA

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  Kobelco July 16th 2021, 6:31 am

Thanks Mark for the reply, a couple of holes are right at .006 . This is a spare engine methanol-w 10lbs boost I hope it lives.

Sad that a factory in America closed, I hope all employees found suitable work.

Kobelco

Posts : 51
Join date : 2019-02-21

Back to top Go down

Probe SRS piston Cyl clearance Empty Re: Probe SRS piston Cyl clearance

Post  Mark O'Neal July 19th 2021, 2:14 pm

Kobelco wrote:Thanks Mark for the reply, a couple of holes are right at .006 . This is a spare engine methanol-w 10lbs boost I hope it lives.

Sad that a factory in America closed, I hope all employees found suitable work.

.006 won't hurt a thing


Mark O'Neal

Posts : 253
Join date : 2009-08-12

Kobelco likes this post

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum