Trackspeed Stage 2 VVT shortblock, EFR6758, E85, 452whp/427wtq@26psi. I'm scared.
11-09-2017, 11:41 AM
#41
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DW300 would probably do it. They updated the 300 a couple of years ago and the flow is very close to the 400-E85 at high pressure. I swapped because my DW300 failed a couple of weeks ago (complete failure, just stopped turning on). I had no indication that the Walbro pump was anywhere near the limit - the VE table only rises 10% or so from 200kpa to 300kpa since I have a boost reference. Fuel pressure on the hero pass was 84-85psi.
Valves and headwork would be very beneficial at this power level. It won't make a big difference on torque, but it would probably have pushed this setup north of 500whp.
Valves and headwork would be very beneficial at this power level. It won't make a big difference on torque, but it would probably have pushed this setup north of 500whp.
One sick turbo if it does!
Head work would cause a big drop in the boost required at the same HP?
Any IAT drop is always nice at the track!
Would allow a big jump in the pump gas tune as well I would think?
Killer build Andrew!!
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11-09-2017, 03:39 PM
#42
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Nice job Andrew.
RE: T5 trans: it would handle anything you can throw at it in a car as light as a miata. But with the bolt-in BMW trans option, why would you go with a T5?
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11-10-2017, 12:44 AM
#43
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The head is not ported in any way and has stock cams and still makes 10hp/psi?
Its extremely strong, in my opinion. The turbo must be extremely free flowing on the exhaust side.
Dann
Its extremely strong, in my opinion. The turbo must be extremely free flowing on the exhaust side.
Dann
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11-11-2017, 03:15 PM
#44
Will it? I know a few guys that have broken them and gone to TKO500s with just bolt on 5.0s on factory 5 cobras that weight in the 2400lb neighborhood. I'm personally worried about mine, but it would get built into a dogbox is it blew. Also supposedly the T5s dont like shifting above 6500rpm. I havent run into that problem, might be because I have a twin disk or might be because I dont have a tach and I have no idea what rpm I shift at.
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11-12-2017, 06:35 PM
#47
Andrew, did you ever document your fuel system build? I am planning out my winter purchase and want to copy what you did (or maybe just buy it all from you?).
You kept it returnless correct? Did you put the e85 sensor in the engine bay or in the fuel filter location like the Flyin' Miata kit? Would you be able to talk me through it via email if not on MT.net?
You kept it returnless correct? Did you put the e85 sensor in the engine bay or in the fuel filter location like the Flyin' Miata kit? Would you be able to talk me through it via email if not on MT.net?
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11-12-2017, 09:52 PM
#50
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Fuel system starts at post #331 here: https://www.miataturbo.net/build-thr...t-84579/page6/
Cliffs notes: DW300 or Walbro 450-E85 in the tank, 10awg milspec wired to bypass the OEM connector with bulkhead isolators, dedicated 30A relay wired straight to the battery. Gates $20/ft submersible E85 hose inside the tank, Earl's Vaporguard everywhere else. Fuelab 818 filter replaces the stock unit. Fuelab 535 regulator at the back of the car, OEM lines forward of the rear bulkhead, OEM fuel rail, ID1000s. I sell all of it.
Cliffs notes: DW300 or Walbro 450-E85 in the tank, 10awg milspec wired to bypass the OEM connector with bulkhead isolators, dedicated 30A relay wired straight to the battery. Gates $20/ft submersible E85 hose inside the tank, Earl's Vaporguard everywhere else. Fuelab 818 filter replaces the stock unit. Fuelab 535 regulator at the back of the car, OEM lines forward of the rear bulkhead, OEM fuel rail, ID1000s. I sell all of it.
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11-14-2017, 02:10 PM
#59
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Not sure. I have never played with the MS3's traction control strategies. The RL actually intercepts the injector pulses, which is the right way to do it IMO (even better than DBW throttle management). I wish the MS3 would do the same - all it would need is the four wheel speed sensor inputs from the ABS system and some code (and maybe some licensing dollars to Racelogic).
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