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SIMER's super-ultra-mega EJ207-6MT-Brighton
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Old 12-01-2016, 06:20 PM   #81
nhawks
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low compression square pocket dish stroker ewww. oe closed deck though so that's nice.
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Old 12-01-2016, 06:27 PM   #82
SIMER
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stock tune friendly Believe me, if I had to resources to tune my ECU, I would've done something more wild. ....I have an EJ257 case in my shop itching for a big build for when I upgrade to a standalone
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Old 12-01-2016, 07:47 PM   #83
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What heads and turbo are going on it? Ive never been a fan of the stroker motors sacrifice 800rpm of redline for 200rpm quicker spool and peakier torque band. anything that doesn't rev to atleast 7500rpm reliably on a 6spd just feels wrong IMO.
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Old 12-02-2016, 11:44 AM   #84
SIMER
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Unless I get another set of heads to build, I'll slap my v5/6 EJ207 heads on the 257 block with either my VF28 or a VF39 or something. I'm don't know what my torque curve looks like now or what it looked like before but I didn't have to sacrafice and redline RPM; why would you?

Does 92Ss have a thread for the development of the software for my ECU?
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Old 12-02-2016, 04:43 PM   #85
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Old 12-03-2016, 09:55 PM   #86
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how do you like the 3.90 6 speed vs 4.44 5 speed? i feel like the 4.44 will be fun around corners but suck for driving on the highway.
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Old 12-04-2016, 06:51 AM   #87
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The 4.44 was great for racing but like you said, terrible for daily driving. 4000 rpms @ 75mph in 5th gear isn't very gas friendly. Plus, my particular gearbox had a really loud whine when light or off the throttle. Got sick of that so I sold it to a grassroots rally team while it was still good which funded my 6mt.

6mt is where's it's at; stronger and better gearing but definitely heavier.
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Old 12-04-2016, 07:05 AM   #88
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If you want a 79mm stroke engine to stay together you dont want to rev them as high, drop about 500rpm to maintain the same piston speed and then also drop another 200-300 or so for the compromise in rod stroke/rod angle. your ultimately limited by your heads and turbo on any ej engine and the heads all have the same limit. The displacement increase generally only yields about 200 or so rpm lower boost threshold, so you narrow your usable rpms by about 500rpm. the larger displacment ej assuming the same heads will have a steeper peakier torque curve, most 2.5s torque spikes up then falls off, a 2.0 while less peak torque has more area under the torque curve and generally make more torque and power from 6k through redline (which with the close ratios of the 6spd you spend a good deal of time in the 6k plus range when accelerating)
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Old 12-04-2016, 01:51 PM   #89
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good info, thanks.

I rarely find myself pulling to redline/rev limit except for the occasional drift or during auto-x. When I first swapped the EJ207, I quickly realized that power falls off around 1000 rpms before redline.
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Old 12-04-2016, 06:03 PM   #90
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Fortunately the only place I ever go that doesn't involve a back road is Seattle to watch those stupid seahawks. I hate interstate driving. Still planning on a 6 speed dccd someday though but not for awhile
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