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KA swap: Best QUIET efi in line fuel pump?


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#21 Icehouse

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Posted 19 December 2017 - 04:29 PM

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


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#22 Roadster-ka

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Posted 19 December 2017 - 04:58 PM

2nd generation 200sx pump. Grab it with the mounting bracket. Not silent but you can't hear it with engine running.

#23 Stoffregen Motorsports

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Posted 20 December 2017 - 08:05 AM

That's a great tip. Using an OEM solution is never a bad idea.



#24 Spiff

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Posted 20 December 2017 - 11:14 AM

I have a 044 type external pump and it's not quiet at all! At idle you'll hear the pump over the engine and that has a 2.5" straight pipe exhaust....
Stock external Datsun pumps tend to be almost whisper quiet, at least the two i have had(280z and 910)

#25 distributorguy

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Posted 20 December 2017 - 02:41 PM

I run an 044 Bosch in my Willys with EFI and its loud as hell.  I run an Aeroquip external pump in the race truck and you can hear it over the open header at speed.  It must be the loudest pump money can buy, even when isolated.  Then again, it pumps more fuel than any other pump in its class, so I guess it function over form.  



#26 freekwonder

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Posted 21 December 2017 - 08:55 AM

ZIP ties ??

 

Lightweight racing fasteners. 


zxzsGEP.jpg


#27 G-Duax

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Posted 21 December 2017 - 12:50 PM

Lightweight racing fasteners. 

 

Timed self destruct mechanism.


"All of a sudden it started making noise, then started losing power. I limped the car home and tried to get it up the driveway, the engine just died."

 

Why do people do this?

A $100 tow bill is never as much as the extra damage you cause by trying to "limp the car home".

 

Don't be that person !


#28 distributorguy

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Posted 21 December 2017 - 01:11 PM

Hell, those big tie straps are likely more durable than a metal bracket!  



#29 thisismatt

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Posted 21 December 2017 - 01:22 PM

To each their own, but I'm with G-Duax. They do fail...
I'm your huckleberry.

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These guys don't appreciate I'm broke

#30 G-Duax

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Posted 21 December 2017 - 01:57 PM

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.....


"All of a sudden it started making noise, then started losing power. I limped the car home and tried to get it up the driveway, the engine just died."

 

Why do people do this?

A $100 tow bill is never as much as the extra damage you cause by trying to "limp the car home".

 

Don't be that person !


#31 ol' 320

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Posted 21 December 2017 - 02:54 PM

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.



#32 mrbigtanker

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Posted 21 December 2017 - 10:45 PM

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.speedway...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.

#33 distributorguy

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Posted 22 December 2017 - 05:16 AM

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.  



#34 Stoffregen Motorsports

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Posted 22 December 2017 - 10:54 AM

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.



#35 G-Duax

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Posted 22 December 2017 - 11:24 AM

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.


"All of a sudden it started making noise, then started losing power. I limped the car home and tried to get it up the driveway, the engine just died."

 

Why do people do this?

A $100 tow bill is never as much as the extra damage you cause by trying to "limp the car home".

 

Don't be that person !


#36 mrbigtanker

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Posted 22 December 2017 - 10:41 PM

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



#37 distributorguy

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Posted 26 December 2017 - 05:49 AM

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.  



#38 Lozer

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Posted 02 January 2018 - 04:32 PM

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


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#39 Three B's Racing

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Posted 04 January 2018 - 07:39 AM

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.



#40 Stoffregen Motorsports

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Posted 05 January 2018 - 10:01 AM

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?