What about this y block for dual feed?

[DTanklage]

after winning the top gas championship my rookie year i picked up a bunch of sponsors

won it the next two years and now i dont have to pay for much!

brooks at mesa hose has been very good to me

if it were coming out of my pocket i would use all pushloc stuff

do you really think that "because the return is smaller (by 1/8") the fuel wont (just turn 90°) and go out the front" ?

i still think it will so i am gonna redo mine and put a very small feed there

thank you wes for explaining the different flow paths of the two different pumps

 

[DTanklage]

Since the P7100 uses longitudinal scavenging instead of cross-flow scavenging, it does not matter on location to feed the pump body.

if you have two equal size feeds and one return and one of the feeds enters the body 5" away from the return and the other feed enters 1/4" away from that return what percentage of flow with be in each feed?

 

[getblown5.9]

after winning the top gas championship my rookie year i picked up a bunch of sponsors

won it the next two years and now i dont have to pay for much!

brooks at mesa hose has been very good to me

if it were coming out of my pocket i would use all pushloc stuff

do you really think that "because the return is smaller (by 1/8") the fuel wont (just turn 90°) and go out the front" ?

i still think it will so i am gonna redo mine and put a very small feed there

thank you wes for explaining the different flow paths of the two different pumps

if you already know it all why are you on here asking questions?

and no it wont just 90 and go out the return, some of it will yes, but the object here is to make sure there is equal pressure and a good cool supply of fuel to both ends of the pump. on a set-up like mine it will do exactly that. im not saying its ideal for every set-up out there either.

if all the fuel coming in that inlet went straight out the return then we might as well eliminate the second inlet and the return, and just dead head the pump because thats essentially the same thing.

 

[DTanklage]

if you already know it all why are you on here asking questions?

excuse me? pump the brakes alice. where in the world did you get the idea that i 'know it all' ? your question kinda answers itself and contricts itself at the same time. you can tell the ones that think they know it all, they are the one with the closed mind that arent asking the questions. n that aint me

i try to keep an open mind and think outside the box

and i ask a lot of questions

and no it wont just 90 and go out the return, some of it will yes,

but the object here is to make sure there is equal pressure

a set-up like mine it will do exactly that.

im not saying its ideal for every set-up out there either.

ummm, thats one of newtons law, you cant help but have equal pressure

what i am talking about is volume, which works totally different than pressure

if all the fuel coming in that inlet went straight out the return then we might as well eliminate the second inlet.....

now you are getting the idea!

that is basically what happens...with equal sized feeds i dont think the system will know the other feed is there. it will be full of pressure, but wont be moving much

....and the return and just dead head the pump because thats essentially the same thing.

no, if you think about it that is not at all the same thing

that would be something entirely different

in that case it would not matter where you put the feeds

 

[DTanklage]

if you have two equal size feeds and one return and one of the feeds enters the body 5" away from the return and the other feed enters 1/4" away from that return what percentage of flow with be in each feed?

Your keeping volume and pressure through the case to the regulator on the -6AN return. So in essence keeping fuel flowing through the return up to the location of the regulator is a good thing.

i do not understand your answer?

what percentage?

as in what kind of split do you think there is?

ie 50/50

90/10

etc

the answer i am looking for would be in numbers

 

[partsguy662]

*cue another questioning post from someone that hasn't tested his theory*

 

[SINNER]

Seems to be a trend.....

 

[wdimig]

ok so am i doing nothing more by feeding it at the front, and out the stock return with a mack overflow valve?, i have about 42-43psi in the pump. it makes sense about feeding the return, but what about if you get air in the pump, will it all just go out the front instead up and out of the return since the pump is at a slight angle sitting on the gear housing? i got to drive the truck, it does seem to run alot smoother, and has more fuel. i am im the process of tuning the AFC, soo that may have helped too, all i want to know is feeding the pump from the front more bad than good. thanks for you info guys.

wes

 

[NickTF]

ok so am i doing nothing more by feeding it at the front, and out the stock return with a mack overflow valve?, i have about 42-43psi in the pump. it makes sense about feeding the return, but what about if you get air in the pump, will it all just go out the front instead up and out of the return since the pump is at a slight angle sitting on the gear housing? i got to drive the truck, it does seem to run alot smoother, and has more fuel. i am im the process of tuning the AFC, soo that may have helped too, all i want to know is feeding the pump from the front more bad than good. thanks for you info guys.

wes

Any change in wot boost? Thanks for reporting your experience with dual feeding!

 

[wdimig]

Any change in wot boost? Thanks for reporting your experience with dual feeding!

well i got to drive it a little bit, i was about to get on it really hard, when i looked down at the fuel pressure gauge to see that it was pegged at 100psi!!!:badidea: that kinda freaked me out, i pulled over only to find out the signal wire was cut for some reason, ill get that fixed tomorow. as for as more boost, i did get on it after the 100psi episode, and the overall it about 2maybe 3psi higher, still pretty smokey. im trying to get the pump more dialed in with AFC tuning. ill have more to report tomorow, and a dyno run this weekend.

wes

 

[getblown5.9]

i doubt i will see any change in boost or any other vitals, but we will see how she pulls saturday night. im gonna run the screamer gear

 

[WUnderwood]

Seems to be a trend.....

x 2

why

do

you

even

ask

if

you

are

going

to

argue

???

 

[stock600]

Well got mine done today and proud with the way it turned out. It looks good and cant wait to see if any diff. is noticed. I noticed that idle fuel pressure is down to 38# from 45# but cant imagine that it could have made that differance, I think its just time to shim the OFV again.... I need to do a regulator instead but that will come later. Gained power [ I hope ] wouldnt contribute to this soley as I also did a timing change again while I was in there. I did have hell with it though, the front plug is a 10mm allen and it was tighter than...... uh, well it was tight. So tight that the super soft plug stripped on me and I had to tack weld the metric allen socket in the plug to remove it..... Wow didnt see that coming, little odd taking the mig to the ol' injection pump, but it worked and got it done. I'll report back what diff. I saw from a 6* bump in static and the addition of the dual feed. Ryan

 

[getblown5.9]

Well got mine done today and proud with the way it turned out. It looks good and cant wait to see if any diff. is noticed. I noticed that idle fuel pressure is down to 38# from 45# but cant imagine that it could have made that differance, I think its just time to shim the OFV again.... I need to do a regulator instead but that will come later. Gained power [ I hope ] wouldnt contribute to this soley as I also did a timing change again while I was in there. I did have hell with it though, the front plug is a 10mm allen and it was tighter than...... uh, well it was tight. So tight that the super soft plug stripped on me and I had to tack weld the metric allen socket in the plug to remove it..... Wow didnt see that coming, little odd taking the mig to the ol' injection pump, but it worked and got it done. I'll report back what diff. I saw from a 6* bump in static and the addition of the dual feed. Ryan

omg you are telling me about that plug being tight. I had the longest box end wrench i could find on the allen wrench for leverage and it took me a good 15 minutes to get it out. 1/4 turn at a time is SLOW...

anyway here are the pics of how I ran mine. no fuel pressure drop here.

 

[DTanklage]

Well got mine done today and proud with the way it turned out.

I noticed that idle fuel pressure is down to 38# from 45# but cant imagine that it could have made that differance

why not?

you just decreased restriction of fuel flow

you made a straighter shot for the fuel to exit

less restriction = less pressure

don

ps - thank you for proving my theory to be correct

 

[Timbeaux]

why not?

you just decreased restriction of fuel flow

you made a straighter shot for the fuel to exit

less restriction = less pressure

don

ps - thank you for proving my theory to be correct

He told you why not... Read the next sentence.







:redx:

 

[DTanklage]

oh yea, the spring in his over flow musta weakened from all the heat when he tacked that socket to the plug

come on

he didnt change the spring...just moved the inlet

and the pressure dropped

:redx:

 

[Timbeaux]

oh yea, the spring in his over flow musta weakened from all the heat when he tacked that socket to the plug

come on

he didnt change the spring...just moved the inlet

and the pressure dropped

:redx:

And you know all this since you were working on the truck right?

 

[HRDROKN]

you made a straighter shot for the fuel to exit

less restriction = less pressure

Although less restriction could in simple terms equate to a lower pressure... the point that may not be clear is that the low pressure side runs at 45psi for example, so there is 45 psi in all directions.... rather than a greater pressure drop from point A to point B.

And I'm still not real clear about whether there is a flow offset or not?

:Cheer:

 

[mondtster]

why not?

you just decreased restriction of fuel flow

you made a straighter shot for the fuel to exit

less restriction = less pressure

don

ps - thank you for proving my theory to be correct

I don't see how this would be true given the fact that the fuel pressure regulator or overflow valve should be after this point and would be what creates the restriction in the line to control the pressure. Regardless of whether or not the fuel is going in the pump and coming right back out the return port the pressure should not have changed like you are claiming.