freekwonder Posted December 21, 2017 Report Share Posted December 21, 2017 ZIP ties ?? Lightweight racing fasteners. 3 Quote Link to comment
G-Duax Posted December 21, 2017 Report Share Posted December 21, 2017 Lightweight racing fasteners. Timed self destruct mechanism. 1 Quote Link to comment
distributorguy Posted December 21, 2017 Report Share Posted December 21, 2017 Hell, those big tie straps are likely more durable than a metal bracket! 2 Quote Link to comment
thisismatt Posted December 21, 2017 Report Share Posted December 21, 2017 To each their own, but I'm with G-Duax. They do fail... 1 Quote Link to comment
G-Duax Posted December 21, 2017 Report Share Posted December 21, 2017 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..... 1 Quote Link to comment
ol' 320 Posted December 21, 2017 Author Report Share Posted December 21, 2017 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. 2 Quote Link to comment
mrbigtanker Posted December 22, 2017 Report Share Posted December 22, 2017 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. 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. 3 Quote Link to comment
distributorguy Posted December 22, 2017 Report Share Posted December 22, 2017 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. 3 Quote Link to comment
Stoffregen Motorsports Posted December 22, 2017 Report Share Posted December 22, 2017 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. 3 Quote Link to comment
G-Duax Posted December 22, 2017 Report Share Posted December 22, 2017 I bought an industrial pipe mount to mount my pump. Used them with my rubber isolation mounts I posted earlier. 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. 3 Quote Link to comment
mrbigtanker Posted December 23, 2017 Report Share Posted December 23, 2017 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 2 Quote Link to comment
distributorguy Posted December 26, 2017 Report Share Posted December 26, 2017 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. 2 Quote Link to comment
Lozer Posted January 3, 2018 Report Share Posted January 3, 2018 I'm using a walbro gsl 392 and its pretty quite but im dynomatted like crazy. 2 Quote Link to comment
Three B's Racing Posted January 4, 2018 Report Share Posted January 4, 2018 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. 2 Quote Link to comment
Stoffregen Motorsports Posted January 5, 2018 Report Share Posted January 5, 2018 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? 1 Quote Link to comment
Three B's Racing Posted January 9, 2018 Report Share Posted January 9, 2018 EFI pump.. 2 Quote Link to comment
ol' 320 Posted January 26, 2018 Author Report Share Posted January 26, 2018 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. 2 Quote Link to comment
Stoffregen Motorsports Posted January 27, 2018 Report Share Posted January 27, 2018 Always something simple. I can't believe you wasted our precious time before you checked all the simple stuff. Just kidding. Quote Link to comment
ol' 320 Posted February 10, 2018 Author Report Share Posted February 10, 2018 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 1 Quote Link to comment
jesusno2 Posted February 11, 2018 Report Share Posted February 11, 2018 you decided against the bosch 044 pump or the TRE pump Quote Link to comment
Stoffregen Motorsports Posted February 11, 2018 Report Share Posted February 11, 2018 Monica Lewinksy Quote Link to comment
datsunrides Posted February 11, 2018 Report Share Posted February 11, 2018 Here is how I did my in tank pump. The parts used were from a 97' Kia Sportage. 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. Quote Link to comment
ol' 320 Posted March 4, 2018 Author Report Share Posted March 4, 2018 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! Quote Link to comment
G-Duax Posted March 4, 2018 Report Share Posted March 4, 2018 But sniffing race fuels is half the fun.......... 1 Quote Link to comment
mhub91 Posted March 5, 2018 Report Share Posted March 5, 2018 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. Quote Link to comment
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