Looking at some JE pistons.... http://quantum-racing.com/shopsite_s...ml/Engine.html

http://www.jepistons.com/pdf/2002-sp...yotasubaru.pdf

They come with choice of 8 or 8.5 CR and are $600 for a set with rings and pins.

Eagle rods come with 5/16" ARP 2000 bolts $375 a set.

http://www.cdpautomachine.com/ecatalog/importrods.html

Any thoughts on these?

Seems that if I used a Phase I CDB and crank I would not be able to use the rods since they are for Phase II crank. They seem highly rated as do the JEs by the 4G63 guys, and a good price.

 

go for it

rods are copies of the arrow design, or vice-versa

 

2 options are distilling out then...

1. Phase I CDB and a set of Lateral conrods and some JE pistons - what CR would I get with thin or thick headgaskets for JE pistons that are 8.0:1 or 8.5:1 designed for Phase II? Is there a strength advantage of specifying the thinner headgasket?
2. Phase II ODB and set of Eagle rods and JE pistons 8.5:1 with standard headgasket should all fit together and give me 8.5:1?

[Edited by john banks - 1/22/2003 9:45:10 PM]

 

more rods
http://www.pauter.com/subaru.htm
http://www.todaracing.com/products/subaru_wrx/index.html

 

I know I've just been internal on my engine and only spent £100 on secondhand pistons .......... but ....if I was you and you're going 'in' why not spent an extra £600 and get the CDB bored/linered out to 2.2 ? The same rods would fit, probably find that oversize of piston in JE's catalogue at the same price.

Just think, 10% more everywhere !! This turbo I've built would suit a bigger capacity to keep it out of surge low down. Based on my results you would have 1 bar from 2500 rpm and 400+ bhp without even venturing over 1.3 bar or 6000 rpm

You know you want to

 

thats 2 of us saying to get more cc's john .

you know my feeling on this,run it at 325bhp and learn to drive the ******,the cash saved will pay for all the 1/4 panels and bumpers

if it blows up,go daft,go huuuugggge

 

...or pick up an old legacy 2.5 bottom end

Richard

 

Can you fit a Phase II EJ25 crank to a Phase I EJ20 CDB?

[Edited by john banks - 1/23/2003 3:59:38 PM]

 

you can but you need to do some machining for the bearings.

David

 

John,

Take a Phase 1, 2.5 crank!

Mark.

 

How much longer is the stroke on the 2.5 crank or is the 2.5 all done through bore size? Anyone got any links on the dimensions involved so I can consider my 50p stroker kit

 

ej20 = 92.5mm bore/75mm stroke
ej25 = 99.5/79mm stroke (stroke info from Paul - thanks!)

Pistons are heavier.....but do the sums on a 25% displacement increase I'm also assuming more gas flow to get the turbo spinning......nice!

Richard

 

As far as I know...
Bore vs Stoke for standard engines
EJ20 92.0 x 75.0
EJ22 97.0 x 75.0
EJ25 99.5 x 79.0

 

Wow, those eagle rods are so cheap! Hey, why not get a couple of sets whilst you are at it, then if one does let go, you just throw it away and fit one of your spares!

 

I was hoping Moray that as well as being cheap they would be good quality Trouble is I need the 48mm ones for a Phase I crank unless someone comes up with an alternative thing to do with my EJ20 Phase I CDB.... Relinering and boring it will really push the cost up IMHO. Just not worth it on a £10K car IMHO. Insurance won't cover the replacement value either.

[Edited by john banks - 1/23/2003 6:49:47 PM]

 

John,

you can fit a Phase II crank into a Phase I block but it is very time consuming and typically expensive as the block needs to be modified and you end up with two thrust bearings that have to be matched to less than a thou. Quotes I have had - with no guarantee of success have been £200-400.

Although I know it is cheaper up North and Dave Wallis has a Dremel (JOKE - just in case this is misinterpreted!)

Trout

 

The 48 mm for the bearings of a phase 1 crank, is it for the main bearings or for the big-end bearings? What are the diameters for the phase 2?

Mark.

 

I've bought an EJ25 now, so there are some nice piston/rod choices from the US

 

I dont have a dremmel.. cheeky git..

Its an air die grinder..

David

 

My 2.5 pistons (inc pin & clips) are no heavier than standard STI5/P1 pistons.

Which is nice

 

Can you give any info on what you are doing to your 2.5? What type are the pistons, where from etc? Are you using a CDB or ODB? Any help on what size rods (big end eyes) appreciated. Think it is a Phase II ODB 2.5 I am getting.

Are the rod eyes 48mm on the Phase I and 52mm on the Phase II for the EJ25s?

[Edited by john banks - 1/24/2003 5:17:43 PM]

 

I believe so John.

Jase - you were going to email me?

Richard

 

Richard,

I haven't forgot, just been very busy... I will mail you over the weekend. Promise

John,

The pistons are of custom design from J E. There are a few areas in which they differ from other manufacturers/pistons I looked at, all hopefully for the better. Mark Aigin supplied them for me. The rods are also from Mark, and are of I section design, with ARP bolts and are stock 2.5 length (2ltr rods are a different length). 55mm b/e dia iirc. The crank is stock 2.5 79mm throw which will be treated. The Block is being re-lined and also treated. Its a phase 2 SOHC - I believe Subaru changed the location of the thrust bearing for a reason. I did hear that the webbing was also stronger on the p2... no idea whether this is true or not though.

Should be in for March

 

Is it just me, or have the $375 rods dissappeared?? I was sure I saw them on the link a few days ago???

 

Still there.

Presently thinking of a 2.5 open deck block with head bolts, rods and pistons with a Lateral Performance gearset, clutch, flywheel.

Want to break 300 at the wheels on stock internals first though

 

thats nothing special john, aps can get 450 at the fly from stock internals on a 7!

 

Thanks for pi$$ing on my lightly glowing fireworks Adam 300 at the wheels on UK non-STi internals would be special for me anyway Of course if I had the block of an STi 7 that would be a different matter entirely.

When I said first I did not mean before anyone else I meant before the EJ25 block went in, to see what the EJ20 as stock will do.

[Edited by john banks - 1/31/2003 12:43:50 PM]

 

I'm going to throw my AP22 in the bin as It must be knackered, Now showing 375 at the wheels on stock internals

 

Yeah, but you don't count Forrest There is no point in chasing your car I realised this about a year ago and it was heavily impressioned when you flew by my car at Knockhill like it was standard when I had the MD304 and TMIC.