Trackspeed's '02SE "Acamas" - EFR6758, TSE motor, 500whp or bust
#544
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Hi Andrew, not wanting to hold up this thread, but I am trying to piece together your Acama's fuel system mods to go on a startlingly similar build (in Australia). I understand your cliff notes (listed again for clarity below) - but I couldn't follow what happened with the "flyback" circuit. From what I could gather, a VS-20TQ040PBF-ND diode and a HS382-ND heatsink (as identified by JasonC SBB) is there to protect the solid state relay from surge of some sort.
I think my question is this - does that diode and heatsink just get wired inline, between the fuel pump and the battery terminal?
... I have a feeling the question itself will reveal my ignorance![](https://www.miataturbo.net/images/smilies/smile.gif)
Or if you just wanted to sell me the package, I certainly would not complain![big grin](https://www.miataturbo.net/images/smilies/biggrin.gif)
Thanks heaps
Acama's fuel mods:
-**this one added by me** - a "flyback" circuit comprised of a VS-20TQ040PBF-ND diode and a HS382-ND heatsink - but wired in where?
- 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"
I think my question is this - does that diode and heatsink just get wired inline, between the fuel pump and the battery terminal?
... I have a feeling the question itself will reveal my ignorance
![](https://www.miataturbo.net/images/smilies/smile.gif)
Or if you just wanted to sell me the package, I certainly would not complain
![big grin](https://www.miataturbo.net/images/smilies/biggrin.gif)
Thanks heaps
Acama's fuel mods:
-**this one added by me** - a "flyback" circuit comprised of a VS-20TQ040PBF-ND diode and a HS382-ND heatsink - but wired in where?
- 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"
Last edited by ninerwfo; 12-03-2017 at 06:41 PM. Reason: attribution
#545
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Skip the flyback diode, it's only needed if you are running a solid state relay. The SSR was a nice experiment which failed miserably. The idea was to use PWM control to negate the need for an aftermarket FPR, but 1. you need a boost reference in a high-boost, high-power NB, and 2. holy god the pumps run 2-3x louder when you use PWM control instead of on/off.
The rest of your list is correct, I can put a package together. I would add a fuel rail to your list, we'll offer the Radium part. You can get away with stock lines and staying returnless, but I suspect the stock fuel rail is a little overtaxed at these power levels.
The rest of your list is correct, I can put a package together. I would add a fuel rail to your list, we'll offer the Radium part. You can get away with stock lines and staying returnless, but I suspect the stock fuel rail is a little overtaxed at these power levels.
#557
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Kit ordered a few months ago. Too busy to even unbox it. ZF6 from an '04 530i picked up this morning. ACT HD PP and KMiata 22-spline disc arriving next week. Tearing the car down this weekend to test fit parts. David is sending the updated trans mount and a PPF delete as well.
Hoping to make MRLS, we have a good shot.
Hoping to make MRLS, we have a good shot.
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