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Opinions needed - Performed Optical Bump

Will L. said:
Unless I am completely confused on my memory of the ds4, Rockabilly has that correct.

Something that hit me in reading this, quite a while back Roy and I were in disagreement over. 5/16 line being upgraded to 3/8 line- which the op here has done and long since eliminated the factory ffm. But if you are concerned with getting enough fuel into the transfer pump (something all 3 of us agree is a good thing) then that larger diameter line pushing 14 or 18 psi- whatever it is- would refill faster with the larger line. Having a larger reservoir of fuel at pressure will always fill the next chamber faster if everything else is equal (like no mods internally that affect flow). Now, I would have to do the math, but a simple calculation says set volume at pressure x is equal to same volume at pressure Y.

And remember, no pump actually creates pressure. They all create flow, and the resistance to that flow creates the pressure.
Click to expand...
What I was saying a while back was the same. The 5/16 line is stock. You showed why GM did this which I knew. But my point was modding the line to 3/8 without a better lift pump would drop pressure though increase volume capability on the same pump. You said this exactly what GM did in reverse trying to raise pressure at https://www.thetruckstop.us/forum/threads/opinions-needed-performed-optical-bump.49575/post-609863

Since 3 of whomever agrees filling the transfer pump fully and fast I am just saying you can force more volume through a smaller line with real pushing power behind it from a real motorized pump that keep pressure to move volume through that sma line. As a Stanadyne shop mods like a 3/8 line could not be done by us, but we could put on a lift pump that sat on the upper end of the spec for the IP. The difference is the OEM pump cannot reach that 16 to 18 psi upper end and a true motorized pump can and at twice the volume, and I can feel the difference is huge even through the 5/16 line

We were saying the same thing except not with the 3/8 MOD.
 
dbrannon79 said:
@royunion if you don't mind me asking, can we see some photos of your setup installed on your rig? also if you have some from others who run it on theirs?
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No, it is not for vehicles with a fuel line mod. They would not sell it to you and would not honor the warranty

You can make something up on your own if you want I suppose.

Maybe Rockabillyrat can help?? See https://www.thetruckstop.us/forum/threads/opinions-needed-performed-optical-bump.49575/post-610053
 
Won’t show a picture of your truck for him to see if he wants to use and maybe go back to the 5/16 and reinstall his ffm.

How would THEY know unless they are you? A person buys a part, the seller doesn’t know if it is going on that truck or if someone is making an experimental aircraft!! Hahaha.

It’s a good thing I am wearing my boots because it’s getting deeper
 
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@royunion People buy different parts all the time that are not necessarily intended to be used for what it’s made for. Back in the day I worked for my local Napa, local farmers would come in asking for a low pressure high volume pump for tractors and all kinds of equipment where the OEM was astronomical in price or the tractors were just so old the OEM couldn’t be found. Of course Napa or any other auto parts store didn’t have an application listing for this kind of stuff. When It came to warranty we never questioned what they were using it for because we stood behind the products. Sometimes they’d explain what they were doing and we’d be able to recommend things, again not by application.

all I’m asking is to see some photos of this setup installed and in action. Most of us guys like me save the things we take off our trucks like the FFM if there’s a chance we might want to later put it back or have it available for a friend in need. (Why my wife says I’m kin to Sanford n son):p

you’ve called this setup a “Sure Cure” lift pump system, I’ve actually searched other sites and forums and have not found much of any other discussions or photos but one single website that to me looks kinda sketchy with all the ads and Amazon links

here’s the link...

https://www.hpcman.com/Sure_Cure_GM_6_5_Lift_Pump_Solution_Kit
 
Well boys I just couldn't sleep last night knowing that my boy Roy is somewhere out there sitting at home believing his misinterpretation of how a DS4 operates is correct. Now I will agree that higher inlet pressure does help in the higher RPMs by helping the transfer pump fill faster. Because I do plan on raising inlet pressure on my DB2 build for that reason. But this theory that higher inlet pressure causes the fuel solenoid to work less at idle is just absurd. But instead of going back and forth bickering I came up with a better idea to put this whole thing to rest by letting the data speak for its self.

If higher inlet pressure is really taking stress of the solenoid we should see that in scan data. Mainly closure time. So here is my idea. someone record closure time at 5psi and again at 18psi. If what Roy i saying is true it should change with higher pressure. I don't have a DS4 truck otherwise I would be on this already.
 
I like this idea
I have a DS4 truck, but only have the GMTDscan software on my laptop. I can try but other than figuring out how to record, I'd also need to regulate the LP to 5 and find something to get 18psi. I think MrMarty51 said he has a Holley setup with a regulator on his truck it might be easier for him to record the data
 
dbrannon79 said:
I like this idea
I have a DS4 truck, but only have the GMTDscan software on my laptop. I can try but other than figuring out how to record, I'd also need to regulate the LP to 5 and find something to get 18psi. I think MrMarty51 said he has a Holley setup with a regulator on his truck it might be easier for him to record the data
Click to expand...
I have that system setting on the shelf.
I do howsomever have a facet solenoid type pump, i think the most it puts out is about five PSI. The carter pump that is now on the truck it outs out about 12 PSI at idle.
I’m still getting My truck back together but when it is done I can run it and get the infuhr mashun.
I’m thinking I might try that pump on there too. It looks like the Delco style pump.
 
WHOA
WHOA
WHOA!!!
Wait just a minute their pilgrim. Using the scientific method to accumulate data and demonstrate the physical properties of a mechanical operation? You mean EVIDENCE? C’mon man!

What, then if someone obtains evidence, like record it and put it on line in video form like bitchute or YouTube?

@royunion
We all talkie talkie. Shall you walkie walkie?

I have neither a ds4 truck, nor scantool to support the poor thing. I live in the db2 world on purpose, and give away the ds4 stuff that falls in my lap time to time.

It would be cool to see someone do this even if they don’t have a dog in this fight, because owning a ds4, they kinda do.

Man how I wish greenmeanie with his electronics & potentiometer controlling fuel pressure on the fly could see this and shed some light. That is the system I am convinced would be the Premier lift pump system for all ds4, especially hot rods, and hotrod db2.
I been bugging him since late 2014 to make and sell them, but think he has no desire to sell them. For those that don’t remember me bringing it up, here is where he first posted it. I’m fixin to zombie that thread over there. http://www.hummernetworkforums.com/viewtopic.php?t=239598&postdays=0&postorder=asc&start=0
 
@royunion after you posted about the sure cure lift pump I had to look it up.

Sure Cure GM 6.5 Lift Pump Solution Kit | Mobile device => "Request Desktop Site" to best use this site

www.amer-grp.com www.amer-grp.com
And the way that website is wrote out sounds pretty much like the way you have been sounding on here. And with every post it sounds more and more like you are the one selling the “sure cure lift pump”. And then you are asked several times to show it to us and you don’t.


And then you say this.

royunion said:
In my posts are enough clue to build something yourselves, if you know the features of the OEM lift pump.
Click to expand...


You once again don’t show a picture and pretty much say build something yourself and then you say this.

royunion said:
No, it is not for vehicles with a fuel line mod. They would not sell it to you and would not honor the warranty

You can make something up on your own if you want I suppose.
Click to expand...

And that statement right there pretty much proves to me and I’m sure a few others on here that you are probably the one selling this pump but don’t want to show it to us so that it can’t be copied.


A fellow forum member is asking for info on your lift pump and you seriously can’t take a picture of what’s on your truck. That blows my mind and is honestly freaking crazy to me.


Will L. said:
Won’t show a picture of your truck for him to see if he wants to use and maybe go back to the 5/16 and reinstall his ffm.

How would THEY know unless they are you? A person buys a part, the seller doesn’t know if it is going on that truck or if someone is making an experimental aircraft!! Hahaha.

It’s a good thing I am wearing my boots because it’s getting deeper
Click to expand...

EXACTLY Will
 
Thank You @Jaryd You came to the same collusion as what I had come too. His posts are word for word right out of his adds. I do believe he is an artist within the divisions of the scams.
If he is not, he now will probe up with some pics and actual fuel pressures or he will run offt wit his tail betwixt his laigs.
 
Well, I do have proof of My fuel system I had worked on for the 78 MG-B Roadster.
Hailed it right offt the top shelf, where there was plenny a dust a collectin.
I do have the sheeeet for the FP but there is no specs within all them different languages. I tried to do a look up according to the numbers stamped on the FP housing but could not find one thing about it. Tried the numbers in the carter pages and nothing there too.
IIRC, i think this pump was rated for around 60 PSI but there has been a lot of bridge under the water between then and now.
The sheeeet on the regulator has a bit more information and is stted that it will survive under pressures between 30 and 100 PSI so I believe that what I have here might be way too over rated for the 6.5 diesel pump.
If someone has a lower rated regulator i would send this pump straight to You, no returns necessary. I have another like new pump I could kick in with it too. Either pump has no more than an hour or two run time.

57F71CBC-0312-4BE9-BE48-43E04B173CFB.jpeg

7D33F9AB-722E-47F0-B055-B86C226F36AF.jpeg
 
MrMarty51 said:
Thank You @Jaryd You came to the same collusion as what I had come too. His posts are word for word right out of his adds. I do believe he is an artist within the divisions of the scams.
If he is not, he now will probe up with some pics and actual fuel pressures or he will run offt wit his tail betwixt his laigs.
Click to expand...


I don’t normally jump into stuff like this but I just couldn’t help it. This whole thing has been nuts since @royunion jumped in. And to have someone tell you what they are using for a lift pump like it’s the greatest thing on the market but don’t offer to show it after being asked multiple times and then say to build one yourself is just crazy to me.

Like I said, I don’t normally say nothing when this kind of thing happens on here but I had to this time. I don’t care nothing about getting in a pissing match about this either. I think everyone on here can see through this crap.
 

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Sorry about the double play don't know why it did that. Also thought I had recorded the results of the higher fuel pressure but evidently I didn't. I raised it to just under 15 psi and it actually made more difference than lowering it did. It would bounce between 2.0 and 2.03, I would have thought it would lower the time rather than increase it. Maybe someone can explain that to me.
 
So closer time on average increased by .03ms. Thats an extremely small amount but its weird that it went up instead of down. So this disproves Roys theory and actually it did the opposite and made the fuel solenoid work harder. INTERESTING! I wish I had an explanation for that🤔
 
So I’m assuming that right at 8 psi would be optional at all times, idle or under load for the DS4?

@ak diesel driver I like your gauge setup on the upper console. I’ve already been thinking about what I could put there like switches and gadgets. I’m sure you probably posted somewhere on how you did it, but I’m interested on how you did your install 😀

I need to get a LP with better gph and a regulator I finally got out today, took a 50 or so mile round trip to good ole San Antonio. Noticed my pressure dropping to around 3 psi on the interstate. The only time pressure went up to 7-8 psi was while coasting! Other than that truck ran fine. Although it’s too early to tell but by just watching my fuel level and trip mileage I’ve gone 140 miles and only used a 1/4 tank
 
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