EJ20 build - JE pistons/Eagle rods
22 January 2003, 07:24 PM
#1
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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.
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.
22 January 2003, 09:04 PM
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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]
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]
23 January 2003, 12:44 AM
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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
.......... 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
23 January 2003, 12:55 AM
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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
.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
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23 January 2003, 05:16 PM
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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 
23 January 2003, 05:23 PM
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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
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
23 January 2003, 06:48 PM
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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]
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]
23 January 2003, 09:55 PM
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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
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
24 January 2003, 05:08 PM
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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]
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]
25 January 2003, 01:23 PM
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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
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
31 January 2003, 08:57 AM
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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
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
31 January 2003, 12:40 PM
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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]
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]
31 January 2003, 01:14 PM
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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.
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.
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