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Old 09-10-2010, 04:15 PM   #1
Rick Hunter
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Default Custom 3MI Racing Long Rod Kit Pics

Hello Gents,

Here are some pics of the LR kit I'll be using for my build. They'll be going into an ej257 short block with stock JDM v8 heads/cams and a 75 mm crank. Turbo will be a BW s258 (.70 AR hotside).

Rods are ~4 mm longer than stock ej257 rods.
The JE pistons have been made to best match the ej207 head chamber to have a decent quench area.













More details to come soon.
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Old 09-10-2010, 06:30 PM   #2
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Those rods certainly look familiar!

Stock bore or sleeved? I have the "cheap" version with only +2 rods.
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Old 09-10-2010, 09:41 PM   #3
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Yeah, they are some custom Crower I-beams. I don't make the rods myself, just have them made to my specs. The Crower rods are also a great deal lighter than the bomb-proof Pauter rods...hence the switch.

The slugs are JE products, once again to my specs and quench pad design.
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Old 09-10-2010, 10:20 PM   #4
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Very nice. When can we expect to see it all together and with some dyno numbers?
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Old 09-10-2010, 10:59 PM   #5
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He had told me he had planned to have it running soon. We've been discussing his 100mm bore and him wanting to pin it (using hot honing of course) and then the potential sleeving. So it's a three way conversation between Ingo, his machinist and me. I'm stoked to see everyone of them get going.
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Old 09-11-2010, 12:36 AM   #6
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If all goes well, it'll be up and running in a month from now. Like Micah mentioned, I'm still on the fence regarding the block. With the help of everyone involved, I'll have to choose between using the stock block @ 100 mm (and turning down the wick a bit), a pinned (hot hone) block or go all out and Darton sleeve it ($$$).

This will also be my daily driver running 94 octane year round thus longevity and reliability is definitely a priority for me. Will choose the block build by the end of next week at the latest. Dyno numbers? Before Christmas!

Ckxx: Yup! Quite the similar build! GL on yours!

Last edited by Rick Hunter; 09-11-2010 at 12:47 AM.
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Old 09-11-2010, 11:23 PM   #7
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Nice setup Rick, I'll be following this to keep on your progress. What are you goals for this build if I can ask?
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Old 09-12-2010, 02:09 AM   #8
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Goals are a reliable car that'll run low to mid 120s trap. I'll also be auto-xing again. The torque of the increased displacement and compression ratio (9:1) should help for the latter. With the current setup - 7 cm fpgreen @ 21 psi on the stock jdm version 8 with a jdm 6 speed I was able to run consistent 114-5 mph traps.

Last edited by Rick Hunter; 09-12-2010 at 09:29 PM.
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Old 09-13-2010, 10:44 AM   #9
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+4mm per rod? i thought 2mm was the max.
other then pistons what's needed to squeeze those rods into the engine?
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Old 09-13-2010, 11:30 AM   #10
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Quote:
Originally Posted by kevinh211 View Post
+4mm per rod? i thought 2mm was the max.
other then pistons what's needed to squeeze those rods into the engine?
nope, there is actually a little more room but +4mm is all the longer that I find to be useful. The sky is not the limit with a subies and high RPM

What do you mean what else is needed? The pistons and rods are actually proprietary (not interchangeable with OTS parts). Assembly have a few tricks to go along with it.
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Old 09-13-2010, 02:35 PM   #11
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whats the displacement going to be?????
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Old 09-13-2010, 02:57 PM   #12
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2.357 L (due to the .020 overbore)
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Old 09-13-2010, 03:41 PM   #13
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Love it, Good luck with it
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Old 09-13-2010, 03:55 PM   #14
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Quote:
Originally Posted by Homemade WRX View Post
nope, there is actually a little more room but +4mm is all the longer that I find to be useful. The sky is not the limit with a subies and high RPM

What do you mean what else is needed? The pistons and rods are actually proprietary (not interchangeable with OTS parts). Assembly have a few tricks to go along with it.
what are the tricks if you dont mind me asking?
are their any clearance issues? like a rod hitting the block?
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Old 09-13-2010, 06:00 PM   #15
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no rod clearance issues at all. The rotating kits are completely DIY but the assembly is a little different.

Just have to shim the block for wrist pin installation.
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Old 09-13-2010, 11:14 PM   #16
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ok so its a 2.35 with the longer rod to give better rod/stroke ratio, what are your planned rpms??
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Old 09-13-2010, 11:20 PM   #17
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Assuming you have enough oil pressure, whats a reliable RPM this motor can spin to? Probably will have a sick power band after it's completed.
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Old 09-13-2010, 11:53 PM   #18
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Quote:
Originally Posted by seanathanq83 View Post
ok so its a 2.35 with the longer rod to give better rod/stroke ratio, what are your planned rpms??
This is one of the setups I told you about last year when you were searching for engines. Nothing new, been doing them since 2007.

RPM will be his call. 35R and smaller it's useless to go beyond 8500 as the turbo is done and you still fall back into the powerband.
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Old 09-14-2010, 12:51 AM   #19
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I'll be keeping the 8k rev limit as I'll be running the stock jdm ver8 heads/cams. The turbo uses a 58 lbs/min compressor, so nothing big really.
My peak power will probably be around 6500 rpm, like most stock ver8 head/cams. Theoretically, the long rod setup should move my power-band a bit to the right.

On the other hand, I'm still planning to return to auto-x'ing. The stock ej207 & the FP Green 7cm sure were a laggy combo. To remedy this, I've chosen to have more displacement and a 9:1 compression ratio on the new build. Should help!
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Old 09-17-2010, 03:42 PM   #20
Rick Hunter
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Small update - found a used block that's suitable for sleeving. The block will be sent away in a week to get the Darton sleeves installed.
Heh, at this point I should have gone with a 102 mm bore. Too late now!
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Old 09-17-2010, 05:34 PM   #21
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Yeah, should have gone with 4" actualy

I'll have the revised instructions (with pretty pics) for assembly in the AM.
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Old 06-16-2011, 03:21 PM   #22
Rick Hunter
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IT LIVES! Finally!

Quite the quiet built motor - piston slap is minimal.
Will post build details later.

Breaking it in now, so far so good.
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Old 06-16-2011, 03:21 PM   #23
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<dupe>
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Old 09-28-2011, 06:07 PM   #24
morrocco88
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Any updates on this build?
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Old 09-28-2011, 07:51 PM   #25
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Last call I got from him was to help diagnose a few bugs with wiring/tuning. I need to follow up and see if everything got sorted out.
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