Edit: Originally posted as EJ18 rather than EJ20. I was mistaken about which had the 92mm bore. EndEdit

 

As i understand it, the EJ18 has the same bore as the EA81 and EA82. Assuming that is correct, does anyone know if the wristpin bore and position are compatible with the EA81/EA82?

Edited January 21, 201115 yr by NorthWet
Update Title to be more relevant

Actually its ej20 that has the same bore as ea82/81 but no other dimension will match; not wrist pin diameter nor position..

Hth

Kaz

Yep, only the bore is the same (EJ20), all other piston dimensions are off.

How great of a difference on pinbore and distance to piston deck?

The ea wrist pins are not as big around (diameter) and the EA are a lot longer. Gotta dig in the book to find the depth.

This is an interesteing notion, considering the EA82 was originally propposed to be a 2.o in the development phase, or that a 2.0 ej was based on ea bores.

The ea wrist pins are not as big around (diameter) and the EA are a lot longer. Gotta dig in the book to find the depth.

Although not ideal, the Ej pin bosses could be sleeved to fit the EA pins, or perhaps the EA rods could be bored.

 

Pin position relative to crown might be harder to kludge.

Compression height of EJ20 pistons is typically between 32.7 and 33.5 mm depending model year and head gasket thickness. Wrist pin diameter is 23 mm. I no longer have EA parts to compare/measure.

I know what this thread needs and now:

pics of pistons all on a table one pic showing ea71, ea81, ea82, ej18, ej22, and ej25, and maybe a eg33 in there too

beuler.

Compression height of EJ20 pistons is typically between 32.7 and 33.5 mm depending model year and head gasket thickness. Wrist pin diameter is 23 mm. I no longer have EA parts to compare/measure.

A VERY rough measurement of an ea82T piston gives pin centerline to crown of right around 33mm. FSM gives EA82 piston pin diameter as 21mm

 

 

Can someone "remind" me how to change the original title from "EJ18" to EJ20" so that that it can more accurately reflect where this is going?

Edit: Never mind... I figured it out.

Edited January 21, 201115 yr by NorthWet

If one were to fit pistons designed for 23mm pins on a rod designed for 21mm pins, would it make more sense to bush the pistons or bore the rod?

 

Also does anyone have a source for NA EJ20 pistons?

Edited January 21, 201115 yr by NorthWet
Poor grammer and sloppy typing...

 

reddevil milling Phase 2 EJ251 rods to accept STi pistons:

http://forums.nasioc.com/forums/showpost.php?p=17334554&postcount=784

 

He was running 20+ psi, twin-charged, through it about 50 miles later.

How did the rod fail? Something other then small-end failure? (I might have found out if I kept reading long enough, but I had trouble translating crazy-stupid NABISCO-ese .)

I don't think he had rod failure. He blew the piston ringlands apart a couple times due to a lean condition.

Ok, thanks.

If one were to fit pistons designed for 23mm pins on a rod designed for 21mm pins, would it make more sense to bush the pistons or bore the rod?

 

Also does anyone have a source for NA EJ20 pistons?

I regularly tear down NA EJ20 SOHC engines... But in Europe so shipping would be more expensive than the cost of the pistons! I think you'd be looking at 75 - 100 US$ shipped.

...I think you'd be looking at 75 - 100 US$ shipped.

Is that for each piston or for a set of 4 pistons?

One

 

No, a set . I have a few versions available: dished pistons, flat top pistons (with valve pockets) and domed pistons.

Thanks for the info. I think that I will play with the cheaper and more locally available turbo pistons first, but if that is viable I would be interested in NA version(s).

Sure. I have a few sets on the shelf which aren't going anywhere any time soon

Thanks for the info. I think that I will play with the cheaper and more locally available turbo pistons first, but if that is viable I would be interested in NA version(s).

 

I've got a set of N/A EJ20 pistons from a JDM motor that was in a Legacy I scrapped.

 

I'd like to build up the EJ20 with some turbo pistons, so I could part with the N/A ones.

 

One thing though, one of the 4 pistons has some scraping along the thrust side....not too bad though.

 

Let me know what they'd be worth to ya.....I'd GLADLY trade for some turbo pistons:grin:

Looks like other options may be available... Nissan VG33 .50mm over looks to have close specs...

I've got a set of N/A EJ20 pistons from a JDM motor that was in a Legacy I scrapped.

 

I'd like to build up the EJ20 with some turbo pistons, so I could part with the N/A ones.

 

One thing though, one of the 4 pistons has some scraping along the thrust side....not too bad though.

 

Let me know what they'd be worth to ya.....I'd GLADLY trade for some turbo pistons:grin:

I am considering... need some time to think. Casual looking on NASIOC came up with turbo sets for around 35USD.

warning

 

old thread

 

bumped

has anyone completed an EA82 with EJ pistons ?

if so a power increase ?

 

local shop i know said he can bore out the block for larger pistons.