EJ22 Turbo pistons - Page 10

longassname · #**136** 12-24-2005, 08:47 AM

OBI how acurate of a measurement can you get with your calipers of these pistons from the pin to the top of the piston (not the dome/dish but the circle around the edge).

Also, how tall is the dome and what are its measurements at its top edges and what are its meaurements at its base where it meets the top of the piston?

thanks

TomsSVX · #**137** 12-24-2005, 08:50 AM

I get you measurements of the piston, Do you want it from the center of the pin or the journal.?

Tom

longassname · #**138** 12-24-2005, 08:51 AM

Or maybe I can swing by and take a look at them. I'm heading down to Miami now for Christmas with the family. I sent you a pm

longassname · #**139** 12-24-2005, 08:59 AM

I'd go from the top edge of the pin hole to try to get the most acuracy. Then I'd measure the diameter of the hole. With those two #'s we should be able to make acurate comparisons. The key will be to be acurate in measuring the height from the top of the pin hole on the svx piston. It may be hard to do because of the dome and I'm hoping to get a measurement acurate one thousandth.

I just want to verify that the compression height difference is solely due to the piston so that it won't change if different rods are used.

Quote:

Originally Posted by TomsSVX

I get you measurements of the piston, Do you want it from the center of the pin or the journal.?

Tom

TomsSVX · #**140** 12-24-2005, 09:09 AM

Give me a few minutes... I gotta bust out the digital micrometer and see if I can get a good measurement

Tom

TomsSVX · #**141** 12-24-2005, 09:35 AM

From the top of the pin Journal to the top of the piston- 22.16mm
" " hump- 23.04mm

doing simple subtraction the hump is .88mm

At the widest point at the base of the hump- 80.78
" " top of the hump- 78.53

Hope this is all you need

Tom

Phast SVX · #**142** 12-24-2005, 10:10 AM

Quote:

Originally Posted by drivemusicnow

Just thought I'd let you all know that I'm talking to Mike Huml at Slowboy. He's contacting Wiseco about the possibility of creating pistons for the SVX. Since they already have the 2.2T pistons, I wouldn't think it would be too difficult to raise the compression, and make the valve reliefs larger, but we'll see.

Contact at wiseco is a guy by the name of Brian Nutter. I said we could have potentially 5 buyers for 6 pistons each.

Although, I was thinking... How sweet would it be to run like 30 lbs of boost on that 7.3:1 compression ratio

Im not even sure that 7.3:1 would ignite

longassname · #**143** 12-26-2005, 03:38 PM

OBI can you measure from the top of the pin to the top of the 2.2 piston?

drivemusicnow · #**144** 12-27-2005, 07:57 AM

Quote:

I have the ej33 piston here in my office and I was looking at the similarities between the two engines. I can make the pistons you need no problem. Good dedicated strutted forging, pins, ring pack etc. since it's very similar to the EJ22 piston we sell. Let me know how many you want in which compression ratio and bore size and I can get these done in 3 weeks from the time you pull the trigger. Thanks!

This was the response from Brian @ Wiseco.

I will get you pricing asap.

Mike Huml

Here was Mike's copy of Brians reply. Soo basically, this should be easy for anyone who wants a good forged piston. Hopefully some people take this and run with it. I'd love to hear some really high powered SVXes running around.

drivemusicnow · #**145** 12-27-2005, 07:59 AM

Quote:

Originally Posted by Phast SVX

Im not even sure that 7.3:1 would ignite

7.8:1 is the stock compression of a 1g DSM, I'm SURE 7.3:1 would work, just off boost response would be like driving a honda.

OBI · #**146** 12-27-2005, 08:23 AM

[QUOTE=longassname]OBI can you measure from the top of the pin to the top of the 2.2 piston?[/QUOTE

.880 inches

OBI · #**147** 12-27-2005, 08:25 AM

Quote:

Originally Posted by longassname

OBI can you measure from the top of the pin to the top of the 2.2 piston?

The measurement is .880 Inches.

longassname · #**148** 12-27-2005, 08:39 AM

Tom, OBI, how confident are you guys with those measurements? OBI's measurement of the ej22 piston comes out taller than Tom's measurement of the EG33. If this is correct then the SVX has longer rods or a longer stroke.

OBI · #**149** 12-27-2005, 09:15 AM

Quote:

Originally Posted by longassname

Tom, OBI, how confident are you guys with those measurements? OBI's measurement of the ej22 piston comes out taller than Tom's measurement of the EG33. If this is correct then the SVX has longer rods or a longer stroke.

I messed up on the measurement. I posted the measurement of the piston pin top to the top of the piston, but what you need is the piston pin centerline to the top of the piston right?

TomsSVX · #**150** 12-27-2005, 09:21 AM

I am using a digital micrometer... I am pretty confident in my measurements. If someone could measure the 2.2l rod I could measure the 3.3l rod... Or just send me a 2.2l rod or visa versa. It would be best if one person could take all of the measurements with the same instruments to assure accuracy and consistancy between them

Tom