MY 2.35 Engine Build ( Little Help ? )

[cruizer22b]

Well im new here but was told this is the place to get a bit of help with my project. Anyway as the title sais its a 2.35 im doing.

I have an EJ22T Block that has been modified to take the 79mm Phase 2 Crankshaft ive also got my ACL bearing Kit. Im about to buy a set of Wiseco OR CP 97.5mm Pistons. The part im stuck on is what Conrods to use. I was realy thinking Pauter BUT do I need custom one's for the 2.35 or is it just 79mm rods that will work ? Any help would be great.

Thank you.

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[p1prodrive]

iam in the process of building my 2.33 and tbh i would go for crower rods or as you say pauter

you will need these if your running 500bhp

[renno rannes]

Oh for sure im using Pauter,Carrillo,Crower but what length rods are they. Im gonna do a spare 2.5 aswell.

[rustyzipper]

Stock Phase II rods size. Make sure your machinist adjusts the thrust bearing for the Phase II crank. Wiesco makes drop in pistons for this build. Sounds fun good luck.

[Kosmic]

Originally Posted by cruizer22b

Well im new here but was told this is the place to get a bit of help with my project. Anyway as the title sais its a 2.35 im doing.

I have an EJ22T Block that has been modified to take the 79mm Phase 2 Crankshaft ive also got my ACL bearing Kit. Im about to buy a set of Wiseco OR CP 97.5mm Pistons. The part im stuck on is what Conrods to use. I was realy thinking Pauter BUT do I need custom one's for the 2.35 or is it just 79mm rods that will work ? Any help would be great.

Thank you.

With the Wiseco pistons you need 5.180" rods to have an acceptable CR, the problem is all WRX or STI rods are at ~5.137"

You could get some custom pistons to try bring up your CR but I don't know if you can recuperate the 0.043" difference with relocating the piston pin.

The problem also with Pauter rods @ 5.180" is that they are 48mm, your phase II crank rod journals are @ 52mm IIRC.

I'm thinking about a crazy setup that will bring the CR to 9.0:1 using STI/WRX 5.137" forged rods, Wiseco pistons K602M975, phase II crank 79mm and WRX heads. I will post later tonight in my thread and you guys tell me if it make sense.

[ai42]

I've researched this quite a bit and I have all the parts sitting in my garage for a similar setup.

For EJ22t w/ Phase 1 EJ25 Crank, Wiseco Pistons the only rods that will work is...
Factory Phase 1 EJ25 Rods (I have a set PM me if you want to deal)
Pauter SUB-230-510-1315F (Roughly $850 + ship)
Outback Motorsports EJ25 rods ($500 + ship) - This is the way I went.

For EJ22t w/ Modified for Phase 2 Crank, EJ257 Crank, Wieseo Pistons rod options...
Factory Phase 2 EJ251 Rods (or any after market equivalent, FYI this is on SOHC EJ25 2000+)
Scat 2-5180-2047-842-905 ($300ish, I think these are the correct ones, I've emailed Scat and they told me the measurements and it should work, I'm not sure they were intending on making rods for an NA motor, but I think the idea was for a EJ20 stroker but I am not aware of anyone using this size for that application)
Pauter SUB-230-550-1315F (Roughly $850 + ship, note this is different than above)

There are probably some more, just make SURE the rod length = 5.180" (in either build). Just make sure you pay attention to your journal size, first build = 48mm, second = 52mm.

[ai42]

Originally Posted by Kosmic

I'm thinking about a crazy setup that will bring the CR to 9.0:1 using STI/WRX 5.137" forged rods, Wiseco pistons K602M975, phase II crank 79mm and WRX heads. I will post later tonight in my thread and you guys tell me if it make sense.

No that doesn't make sense. Wouldn't that be like LOWER compression like 7.5:1 (I'm guessing, I haven't done the numbers on this). 5.137" rods would mean your piston would be 1mm lower in the deck at maximum compression than a stock configuration. Now if your thinking stupid levels of boost go for it. I guess you could shave the deck to get that kind of compression but that seams like a backwards way to build it. Especially since it looks like those scat rods are cheap and would drop in for your & cruizer22b application.

[Kosmic]

Originally Posted by ai42

No that doesn't make sense. Wouldn't that be like LOWER compression like 7.5:1 (I'm guessing, I haven't done the numbers on this). 5.137" rods would mean your piston would be 1mm lower in the deck at maximum compression than a stock configuration. Now if your thinking stupid levels of boost go for it. I guess you could shave the deck to get that kind of compression but that seams like a backwards way to build it. Especially since it looks like those scat rods are cheap and would drop in for your & cruizer22b application.

Exact.......but.......I'm re-stroking the 79mm 2006 STI crank to.....81mm. It's not expensive at all.

I will post my setup in my thread, I hope to see you post your thoughts there.

Sorry cruizer22b for the hijack, but it's kinda related to your setup also.

[cruizer22b]

Originally Posted by Kosmic

Exact.......but.......I'm re-stroking the 79mm 2006 STI crank to.....81mm. It's not expensive at all.

I will post my setup in my thread, I hope to see you post your thoughts there.

Sorry cruizer22b for the hijack, but it's kinda related to your setup also.

No problem Kosmic keep me updated. Thanks to everyone for posting.