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-   -   Trackspeed's '02SE "Acamas" - EFR6758, TSE motor, 500whp or bust (https://www.miataturbo.net/build-threads-57/trackspeeds-02se-acamas-efr6758-tse-motor-500whp-bust-84579/)

aidandj 12-12-2016 09:57 PM


Originally Posted by acedeuce802 (Post 1380864)
The diode is rated at 1A continuous, but all continuous power will be going through the motor. Flyback current would be a quick surge, which the 1N4007 can handle 30A surge.

This is just my interpretation, is this not correct?

This was also my assumption.

18psi 12-12-2016 11:33 PM

2 coats in
https://cimg1.ibsrv.net/gimg/www.mia...d3562af02b.jpg

https://cimg8.ibsrv.net/gimg/www.mia...57dc566caa.jpg

https://cimg9.ibsrv.net/gimg/www.mia...484f3336fe.jpg

https://cimg0.ibsrv.net/gimg/www.mia...ccfa80aec9.jpg

sent you an email. there's an issue with one of them.

Savington 12-13-2016 12:05 AM


Originally Posted by EO2K (Post 1380859)
I like this one, it looks a lot more legit: https://www.efihardware.com/products...head-terminals

Seems so kludgy, but I think that's the best option. Ordered 6 with express shipping to hopefully see them by the end of the week.

Permatex had a Hylomar product but it appears to be NLA or superceded. Can anyone think of a reason why standard Permatex PTFE goo wouldn't do the trick?

18psi 12-13-2016 12:07 AM

final coat

https://cimg5.ibsrv.net/gimg/www.mia...1e40bee91c.jpg

https://cimg6.ibsrv.net/gimg/www.mia...dbcfef370d.jpg

icantlearn 12-13-2016 12:14 AM

Vlad, what kind of paint are you using, and are you going to "chrome" it?

18psi 12-13-2016 12:23 AM

basic rustoleum paint for plastic. usually flat black or semigloss black is the standard, but you can get creative with tints and pearls if you wanted to.
see my thread about this where I posted various examples, including dark gray pearl.

afm 12-13-2016 12:33 AM

Gasoila E-Seal is a specifically E85-rated thread sealant with PTFE.

https://www.amazon.com/Gasoila-Seal-.../dp/B00CRKVI4S

JasonC SBB 12-13-2016 04:07 PM


Originally Posted by acedeuce802 (Post 1380864)
The diode is rated at 1A continuous, but all continuous power will be going through the motor. Flyback current would be a quick surge, which the 1N4007 can handle 30A surge.

This is just my interpretation, is this not correct?

Take the case of 50% duty cycle. The current might be 5A. The diode (and pump) will each see 2.5A average. It will cook.

Savington 12-13-2016 04:20 PM


Originally Posted by JasonC SBB (Post 1381080)
Take the case of 50% duty cycle. The current might be 5A. The diode (and pump) will each see 2.5A average. It will cook.

Thanks for pointing this out. The form factor of yours makes it a little awkward to incorporate into the harness. How about this: DST2045AX Littelfuse Inc. | Discrete Semiconductor Products | DigiKey Nearly the same specs but easier to drape across two wires and solder into place.

Ordered up a bunch of small bits and wire this morning. 10awg Tefzel wire, DR25 heatshrink, ring terminals, and a single 25A 2-pin Deutsch connector so I can assemble the bulkhead terminals and then never touch them again. I haven't found the fuel pump connector yet - I'd like to buy it in connector+pins form so I can crimp my own wire in. I didn't see it in the connector witchhunt thread, though.

aidandj 12-13-2016 04:22 PM

I bought a the 2 pin connector for 10gauge wire. Let me find where I got it.

Edit: Didn't realize you wanted the stock connector. Can't help you there. I just chopped the 2 wires I needed off. Didn't want to touch the signal wires for level.

Savington 12-13-2016 04:24 PM


Originally Posted by Leafy (Post 1380834)
I think the best answer is really a carb motor high flow low pressure pump in the tank feeding a small surge tank with an outside the tank pump so you dont have to deal with that shit.

I thought about that a while ago and there are pros and cons. I would set it up with something like a DW200 inside the tank on stock wiring and a Bosch 044 under the car. You still need the SSR on the 044 so it doesn't overheat, and I'm not sure if you can blow through an 044 if it's not running. You also need to use another output on the MS to trigger the 044's relay. Is that easier than a couple of $15 bulkhead connectors? Maybe, but I think it comes with its own set of hassles.

For me, the killer was the thought of listening to an external 044 screaming away. Not street-car friendly. Same reason I'm trying to use a DW300 at near-max capacity instead of going to a louder Walbro 450.

JasonC SBB 12-13-2016 04:36 PM


Originally Posted by Savington (Post 1381085)
Thanks for pointing this out. The form factor of yours makes it a little awkward to incorporate into the harness. How about this: DST2045AX Littelfuse Inc. Discrete Semiconductor Products DigiKey Nearly the same specs but easier to drape across two wires and solder into place.

That's a cute diode (I had to look up who Littelfuse ate to acquire their diode business!), but the problem is you can't get the heat out of the package. It's rated at 20A only at 25*C and with a PCB with copper area pulling heat out of the legs. It will overheat at only 5A average or so.

The part I linked is meant to be mounted on a heatsink. This kind of heatsink will probably work:
531202B02500G Aavid Thermalloy | Fans, Thermal Management | DigiKey

Savington 12-13-2016 04:53 PM


Originally Posted by aidandj (Post 1381086)
I bought a the 2 pin connector for 10gauge wire. Let me find where I got it.

Edit: Didn't realize you wanted the stock connector. Can't help you there. I just chopped the 2 wires I needed off. Didn't want to touch the signal wires for level.

I meant the connector at the pump itself - I'm not touching the signal wires for level either.

Savington 12-13-2016 04:58 PM


Originally Posted by JasonC SBB (Post 1381094)
That's a cute diode (I had to look up who Littelfuse ate to acquire their diode business!), but the problem is you can't get the heat out of the package. It's rated at 20A only at 25*C and with a PCB with copper area pulling heat out of the legs. It will overheat at only 5A average or so.

The part I linked is meant to be mounted on a heatsink. This kind of heatsink will probably work:
531202B02500G Aavid Thermalloy Fans, Thermal Management DigiKey

Fair enough. Function over form.

I am definitely going to put all of this together into a kit. It shouldn't be nearly this hard :)

aidandj 12-13-2016 05:08 PM

Don't know about DW300.

Walbro450 is a metripack-280. I got connector and pins for 10awg wire.

Savington 12-16-2016 11:33 PM

2 Attachment(s)
Starting to wire things up. I have the FPR and filter mounted but I'm waiting on some sleeve to protect the fuel hoses as they squeeze their way down past the tank before I start plumbing.

SSR will sit on the passenger side of the car, flyback diode will sit on the driver's side. The flyback ended up being kind of a bulky thing - I didn't have any good solution for splicing a trio of 10awg wires, so I grabbed some spare 12awg and I'm going to connect it to the pump at the bulkhead. That means four wires up to the tank instead of two, but oh well.

Dedicated fuseholder just after the battery will hold a 25A fuse. I even managed to get the wire tucked in with the OEM terminal cover :party:

Attachment 233261

Attachment 233262

patsmx5 12-16-2016 11:48 PM


Originally Posted by Savington (Post 1381087)
For me, the killer was the thought of listening to an external 044 screaming away. Not street-car friendly. Same reason I'm trying to use a DW300 at near-max capacity instead of going to a louder Walbro 450.

I have both of those pumps in my tank, the walbro450 is about 20% louder than the DW300. Barely noticeable but you can hear a difference. I run the DW all the time and stage in the 450. On my car you can't hear either one due to sound deadening.

Savington 12-17-2016 01:52 AM

Interesting, I must have mixed it up with the 044 WRT noise. Radium has a test that says that it's quieter than the Walbro 255 (although that's not a good benchmark either). It's not hard to switch pumps later - just a pigtail swap since I'm wired with 10awg already. It's worth knowing where the DW300 taps out.

18psi 12-17-2016 02:01 AM

taps out at a legit 400 on e85. Maybe a smidge more

aidandj 12-17-2016 08:40 AM

I actually have a video of the 450 noise I'll post it later.

It gets louder when your pwm it. Like significantly louder.


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