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KA swap: Best QUIET efi in line fuel pump?

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Lightweight racing fasteners. 

 

Timed self destruct mechanism.

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I should talk.......

Back in the '70s I ran a 125cc Harley 2-stroke flat track bike (yes, one of those pos Italian bikes).

Did it just because I was working at a Harley shop at the time, and the owner pissed and moaned about me running other brands.

 

To help get the little porker down to a competitive weight, every single bracket on the frame was cut off.

Then I used duct tape to hold the fenders, number panels, and other bits & pieces on.

I managed to get it down to about 160-ish pounds dry weight, and with help from Harley, got the road race port timing spec.s from Italy.

It was fast.

And it was simple to replace the tape.

 

Too bad duct tape wouldn't fix constant broken cranks, failed primary gears, cracked pistons, or split hubs....

All in all, it was a good exercise in overcoming problems, and I won a lot of races with it.

But would I have done it if I wasn't being bitched at by the shop owner ?

Hell no.....

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All good advice. I think I will look for a new OEM 280ZX or 200SX pump or equivalent, and mount it with rubber/duct tape and zip ties to make everyone happy....

 

Whatever I do, I will post and let you know if it is quiet enough or still annoyingly loud.

 

Happy Holidays.

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We used an MSD in line EFI fuel pump for the KA24DE swap into a 521.

 

This thing is louder than a horny woodpecker on Viagra pounding away on a steel flagpole.

 

Seriously, I bet you could hear this pump whining and chattering away over a SBC with open headers.

 

 

msd-2225_cp.jpg

 

https://www.speedwaymotors.com/MSD-2225-In-Line-Hi-Pressure-Fuel-Pump,31226.html

 

No turbo, not a high fuel demand. I don't want to switch to an in-tank pump. Who has used something that is quiet?

 

There are lots of posts on other forums about noisy MSD in line pumps ..... rubber isolators and even building an insulated shroud apparently don't offer real solutions, So I would like to hear what others have personal experience with.

 

Thanks!

That’s what I got in the wagon. Rubber isolaters will keep the noise down. My truck is all aeromotive and I mounted it on the frame rail. Can’t hear it to much. But remember these cars are small. Just like your roadster.

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Those crappy metal clamps wrapped in rubber are prone to tear under high vibration (damaged some on the race truck with only a few hours use), where the thick nylon tie straps are more vibration resistant as long as they aren't pulled over a sharp edge.  There's a reason cops use them as spare handcuffs!  Yes there are far more elegant solutions, but I don't know where you want to draw the line between fabricating custom versus an easy and legit solution.  Making a couple 1/8" thick steel straps is pretty easy however.  

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I am continually amazed at the lack of a good mounting system for those external pumps. Even how-to write ups in street rod magazines show them using those cheap loop clamps. A simple coil bracket would be a massive improvement (I use them to mount the 3-way pressure regulator/filter on my LS swaps.)

 

I have used those style pumps before, but with my own rubber isolated mounting system. And they were never intended to be a permanent solution, just a way to get the customer on the road and inside of a budget.

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I bought an industrial pipe mount to mount my pump.

Used them with my rubber isolation mounts I posted earlier.

 

ZSI_026M030.jpg

 

Only needed 1, but had to buy 5 of them.

So I have extras...

They fit pumps that are 1-5/8" diameter.

Anyone want one, I'll send them Priority Mail to their door for $12.

You supply your own rubber isolators.

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I am continually amazed at the lack of a good mounting system for those external pumps. Even how-to write ups in street rod magazines show them using those cheap loop clamps. A simple coil bracket would be a massive improvement (I use them to mount the 3-way pressure regulator/filter on my LS swaps.)

 

I have used those style pumps before, but with my own rubber isolated mounting system. And they were never intended to be a permanent solution, just a way to get the customer on the road and inside of a budget.

I agree thats why i like Aeromotive they come with good clamps, but you pay for them.lol

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The old Carter pumps great isolators, but those were low pressure not EFI.  The pump was hung via 3 studs (shoulder bolts), through rubber grommets, secured by washers and lock nuts.  

Clamping the body of a round pump needs to be done with a foam or spongy rubber so the vibration doesn't transfer into the clamp.  High durometer materials like suspension bushings or solid rubber (like tire tread) will result in nearly equal noise to using a solid clamp.  The Aeromotive clamp is great, but their isolating material is crap - just like their O-rings.  

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I'm using a walbro gsl 392 and its pretty quite but im dynomatted like crazy.

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Been running an external Walbro 190 for years in my trunk un-insulated and only time I hear it is when I turn the key to start the motor, after that Silence!! and it's now 10 years old.

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Been running an external Walbro 190 for years in my trunk un-insulated and only time I hear it is when I turn the key to start the motor, after that Silence!! and it's now 10 years old.

EFI pump or low pressure carbureted?

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So, after all this great advice, it has been determined that the fuel line was clogged, so the pump was screaming. Tank pulled, cleaned and lined. New filter. Will fire it up this weekend and see if all is well.

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Always something simple. I can't believe you wasted our precious time before you checked all the simple stuff.

 

Just kidding.

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Matt and others....

 

DW100 from Deatschwerks on the way.

 

In tank it is. Or will be.

 

That inline MSD pump moaned like Stormy Daniels servicing ... well, an executive

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you decided against the bosch 044 pump or the TRE pump 

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Here is how I did my in tank pump. The parts used were from a 97' Kia Sportage.

 

rBtJ2k.jpg

XjIYQ6.jpg

IESWWP.jpg

3DEpN8.jpg

 

 

If I did it again, I would probably use the setup from Tanks, Inc. No welding with their setup. Aeromotive has a bolt in setup also, but it is pricey.

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you decided against the bosch 044 pump or the TRE pump 

Yes. I checked several sources and determined the Bosch 44 pump is one of the louder pumps. I really thought about the TRE based on your recommendation, Luke, but once I decided to go in tank I decided to buy the Deatschwerks DW100 as they offered it to me for $99 - and that is with a lifetime warranty.

 

My new best friend Justin used a similar approach to the Datsunride method posted and cut the top off a 240sx tank, then installed the surge pan, then popped in the Deatschwerks pump with all new filter-strainer, etc.

 

Justin cleaned the 521 tank, welded it, then cleaned the outside and did a very, very nice paint job on the assembly. He also installed all new 5/16 vibrant fuel lines and refurbished an evaporating system from a later model S15 and installed that near the underside of the bed near the tailgate .... there will be no gas fumes or venting problems with this setup:)

 

All fittings were upgraded to be ethanol safe. Justin also installed an OEM 240sx fuel filter holder so I can use an OEM steel housing fuel filter. I don't want to worry about a leaky or cracked plastic fuel filter failure down the road.

 

We used the 5/16 fuel line sizing as I will never exceed 400hp (even in the unlikely event I decided to turbo this someday).

 

The Deatschwerks pump flows 165lph, so again I will never need that full capacity. And Justin says it is very quiet.

 

I have some great pics of all of this work but no hosting account.

 

I really appreciate all of the advice from others as I worked through which way to go with fuel system improvements.

Frankly, I want to drive this sucker and never worry about the fuel system again except to occasionally change filters.

I once had a fuel fire in an old VW and while this was back in the late '70s that memory is still vivid.

 

And if I want to keep smelling gasoline fumes I would really rather be driving an old prewar racer than than a Datsun ... that's why the roadster and the 521 both have efi swaps now:) I will get my fill of the memorable aroma of high test at Buttonwillow's British extravaganza or at the event formerly known as the Monterey Historic Races, thank you!

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But sniffing race fuels is half the fun..........

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My intake pump is super loud!  It's a Walbro, maybe that's the issue.  

 

 

Worst / Loudest god damn pump there is!!!!! I will never use a walbro 255 again. Aeromotive, for me.

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