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Not trying to shit on your build, I love reading your threads and your fab/mechanic work is awesome to see... but why go through the trouble of an engine swap to make the same power as a mildly modified bp motor running e85?
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Originally Posted by EErockMiata
(Post 1512966)
Not trying to shit on your build, I love reading your threads and your fab/mechanic work is awesome to see... but why go through the trouble of an engine swap to make the same power as a mildly modified bp motor running e85?
This is a $1000 junkyard motor with forged internals that, unmodified, makes 160+ hp out of the box. With bolt on OEM turbo or super options you can go straight to 300 whp territory. The VVT on both intake and exhaust cams allow awesome torque at low RPM, which you won't see in your mild BP build. Mainly though, I like tinkering and swapping and fabricating. Throwing money at a BP motor is much less fun than figuring out new ways to put square pegs in round holes. |
We had little issue getting 185. And the torque is the same from ~1500. Not sure what BP does that. Maybe a turbo BP? If they could spool at 1500 I guess. |
2.4 liter VVT spells: Torque and torque wins races : https://m.imgur.com/N3mOrJk Normally Aspirated spells: Reliability, a virtue in endurance racing. |
Same reason I went with ecotec over a turbo BP. reliabilty and torque.
What are you running for wiring harness? any of the stock functions or strictly race car chassis harness setup? |
Originally Posted by Flyinglizard45
(Post 1513043)
Same reason I went with ecotec over a turbo BP. reliabilty and torque.
What are you running for wiring harness? any of the stock functions or strictly race car chassis harness setup? |
A guy in SoCal built me a harness from 8-foot MS3Pro flying leads. He turned it around in a couple days and it's pretty tidy. He does a lot of ecotec and other GM harnesses. I'm running (by running I mean, plan on running, when it is running) full standalone with a MS3Pro EVO. I did that for turbo power, but it's an option either way. It didn't come out cheap though, it was in the $7xx range IIRC, plus the ECU and leads from DIY.
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1 Attachment(s)
Originally Posted by nigelt
(Post 1513249)
A guy in SoCal built me a harness from 8-foot MS3Pro flying leads. He turned it around in a couple days and it's pretty tidy. He does a lot of ecotec and other GM harnesses. I'm running (by running I mean, plan on running, when it is running) full standalone with a MS3Pro EVO. I did that for turbo power, but it's an option either way. It didn't come out cheap though, it was in the $7xx range IIRC, plus the ECU and leads from DIY.
I'm currently working on removing any wires not needed for the ecotec to run while retaining all of my cluster / combination switch functions. Kind of in the middle of street car and racecar grey area that never ends well. Attachment 228395 |
We used the standalone race harness from efotex Miata and have been very pleased everything works really well.
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I'm not dead!
New rear bumper and trim piece to be ST5 legal https://www.trackjunkies.org/applica...4cb90117f58ff7 Beefier cover plate for the spare tire cutout. I used rivnuts to anchor it. https://www.trackjunkies.org/applica...82643d6409af28 I ripped out everything inside, including wiring https://www.trackjunkies.org/applica...fcb4a4b480315e and built some fancy ducting https://www.trackjunkies.org/applica...daac6f265c50ab hoses and stuff https://www.trackjunkies.org/applica...08ffebe46179c2 The build went on hold again due to a move to a new house. It was close enough we just flat towed from old house to new: https://www.trackjunkies.org/applica...c78b59ff455a44 More space to work but now we have to set everything up again https://www.trackjunkies.org/applica...573e9e2f135b2a My wiring harness and ECU finally arrived!! https://www.trackjunkies.org/uploads...4028c94f2a.png I built a fancy center console thing to house wiring and switches, and the fuse/relay box https://www.trackjunkies.org/applica...b0babac8ad06a0 ECU and fuse box mounted https://www.trackjunkies.org/uploads...4f42e5d597.jpg IT STARTS AND RUNS AND MOVES UNDER ITS OWN POWER! https://www.trackjunkies.org/applica...506054f426c003 |
The setup from Swap Specialties did not include a tachometer out from the ECU. A bit of web searching seemed to indicate that it was as simple as adding a few wires...
On the GM E67 ECM, you can get a tach signal from pin 25 on the J1 (blue) connector. pin 24 is a pull up resistor to make it useful for most tach-driven devices. I ordered some pins (Molex MX64 33467 Series Female Unsealed Terminal 0334670005, Cable Range 20 18 ga (0.50 0.80 mm2)) and added them to the J1 connector, then connected the wires together and to the Traqmate tach input, and it works perfectly. I checked the tune to make sure "crank" type RPM output is enabled - it won't work if the tune is set to serial or frequency engine speed output. https://www.trackjunkies.org/uploads...5792ff39ce.png Upgrading the house... air conditioned garage is the best garage. https://www.trackjunkies.org/applica...4f6b8a3101926a Amazon special marine switch panel, and Baofeng radio mounted in the center console https://www.trackjunkies.org/applica...5b5a586cea849c Adding Tech Flex to the harness https://www.trackjunkies.org/uploads...d5efdf1174.png Things lighting up https://www.trackjunkies.org/uploads...e954f077fc.png Big beefy battery in the rear again https://www.trackjunkies.org/uploads...28dacf05d0.png Interior coming together: https://www.trackjunkies.org/uploads...b47d3e8617.png Getting fancy with the brakes. All hard lines replaced with steel braided lines. https://www.trackjunkies.org/uploads...afff044221.png Bias valve in the cockpit https://www.trackjunkies.org/uploads...5b01f81e5a.png To make the air dam more sturdy, I went all Forged in Fire and hammered/welded a strip of steel in the shape of the bumper edge: https://www.trackjunkies.org/uploads...cf3389932e.png Aluminum sheet attaches to that https://www.trackjunkies.org/uploads...81ba774b64.png Building another fancy articulating lower air dam / undertray https://www.trackjunkies.org/uploads...4f9ecbda69.png Front aero coming together https://www.trackjunkies.org/uploads...414b63d911.png Custom headlight doors and a little bump in the hood to clear the VVT solenoids https://www.trackjunkies.org/uploads...6a0f505fdc.png https://www.trackjunkies.org/uploads...cf3c5dcb05.png This design adds a lot of complexity but it's nice to be tolerant to off track excursions, and to load the trailer without special ramps or disassembling everything. https://www.trackjunkies.org/uploads...9aeccb6483.png I added the popup headlight assemblies back in, and will be putting bulbs back in. https://www.trackjunkies.org/uploads...6f921b9ca2.png Getting things ready for a shakedown https://www.trackjunkies.org/uploads...9207abc2d6.png How the undertray and stuff all fits together: https://www.trackjunkies.org/uploads...4535fc76a2.png Whipped up a cover for the flywheel: https://www.trackjunkies.org/uploads...efab6df2b8.png Finally out at the track https://www.trackjunkies.org/uploads...7363d5ffda.png And a dyno! https://www.trackjunkies.org/uploads...e7bde7459d.png https://www.trackjunkies.org/uploads...2332f94410.png |
I had issues with gaskets exploding and bolts loosening at the exhaust flange during the shakedown
https://www.trackjunkies.org/uploads...0421465ab9.png So I replaced the flange with a vband https://www.trackjunkies.org/uploads...2518b7e94b.png 250 lbs of ballast https://www.trackjunkies.org/uploads...9903c2251d.png https://www.trackjunkies.org/uploads...b967c535a5.png Whipped up a quick catch can https://www.trackjunkies.org/uploads...022e4869f9.png https://www.trackjunkies.org/uploads...934ff4e5f4.png A bunch of oil plumbing. I put a bypass adapter in the block, and routed the oil to two parallel oil coolers, then through a remote filter, teed to an accusump. This was $600 in AN fittings alone. https://www.trackjunkies.org/uploads...4257d5c8d1.png Fancied up the graphics https://www.trackjunkies.org/uploads...581eb26fb3.png So nice to have the air dam/undertray articulate https://www.trackjunkies.org/uploads...5fd3701a98.png And off to TMS! https://www.trackjunkies.org/applica...bf461198c7faf0 The car ran great! It's right at home in ST5 - On Maxxis I run 2400 lbs at 162 whp, and on Hoosiers run 2465lbs or so. The Ecotec is pretty good on track. The low end torque really helps pull away from corners. |
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