EJ22 Turbo pistons

[OBI]

I want to build a turbo svx motor and the idea of fitting these pistons greatly appeal to me over forged custom pistons. As you all know There is no documented fact of this ever been done. I would like to change that. All I need to discover this possibility is a used svx piston in a standard bore B or C.
I have a 2.2 turbo shortblock ready to fit it into. If anyone knows where i can get this svx piston please let me know.

i doubt they are the same bore

[huck369]

They ARE the same bore and stroke....

the EG33 is basically a EJ22 with 2 more cylinders

[cdigerlando]

Originally Posted by huck369

They ARE the same bore and stroke....

the EG33 is basically a EJ22 with 2 more cylinders

Agreed. I believe there is just a slight difference in the ring clearance specs. I'll look it up. I have heard of this being done, however, I heard that the compression ratio only drops to 9:1 in the SVX motor. I think this would be a great project, especially if you can get stock or used pistons cheap. It would be a whole lot easier to tune with forced air and 9:1 as opposed to 10:1.

[cdigerlando]

Came in late on this conversation. My comment refers to Legacy turbo 2.2 pistons.

[longassname]

I went ahead and made all the appropriate measurements of the SVX combustiion chamber. The confusion about earlier measurements seems to be because the svx piston goes .018" out of the hole. Unfortunately the none of the 2.2 pistons will be appropriate for use in the svx. Before even bothering with calculating the resulting compression it's obvious that the squish area would be rendered ineffective if switching to the 2.2 pistons. I'm doing a full write up in a seperate thread in the supercharger section.

[oab_au]

Originally Posted by cdigerlando

Came in late on this conversation. My comment refers to Legacy turbo 2.2 pistons.

Not a lot of joy in the 2.2T pistons Chuck. It would be too low at 7:1. As the Turbo pistons are not forged, the non turbo 2.2 pistons could be used, with the valve fly cuts enlarged to suit the SVX valves. This would give around 8:1.

Harvey.

[OBI]

I just paypaled tomsvx he's got the piston. Yes the bore and stroke are the same but if the rods are different it might not work. as soon as i get this piston i will be able to find out for sure. Ill post the results.

[TomsSVX]

It will go out on Monday after the holiday weekend is over... sorry for the delay

Tom

[OBI]

Thanks Tom, Im in no hurry.

[dieingSVX]

if you need anything else i have a stripped motor i can donate some parts.

[intelisevil]

Originally Posted by dieingSVX

if you need anything else i have a stripped motor i can donate some parts.

longassname is looking for some alternator brackets.

[OBI]

Thanks guys. Im waiting for the piston Tomsvx sent me. if it dosent have the pin i will need it too. I already took the heads and pistons off the 2.2 block. So far I have been comparing specs from the ej22 manual and the svx manual. the piston diameters,bore diameters and clearances are identical but I cant compare the piston pin diameter since the svx notes i have are missing that data. The 2.2 pin diameter is 22.994 - 23.000 mm. Can anyone confirm this to be the size of the svx pin? There are other things to compare as well like the piston skirt length and conecting rod width and length and if the piston sticks out past the deck. I cant wait to get the piston so i can install it on the 2.2 block and answer all these questions.

[TomsSVX]

I shipped the piston all the rings on it... the pin and the circlips that hold the pin in

Tom

[TomsSVX]

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