Nemesis8

iTrader: (3)

I need to inspect mine after I get back from Michigan. With the tool around $35 and the fp at $138, this is not that bad on the wallet it seems. So, most likely a two beer DIY?

alz0rz

iTrader: (41)

that's something I'd like to do one of these days..

DOMINION

Why? are you guys doing what swoope is doing?

howardteets

^ seconded.

Swoope has a need to do this. Unless your running pre-mix and track days. There's really no need.

I have not touched my fuel pump and have not had a single issue with it. It's been running strong since July '04 for 42k miles. But I don't run pre-mix and I don't track my 8 either. For my car, it wouldn't even be worth my time or the potential fuel smell in the car for a day or two, to remove the fuel pump just to inspect the sock.

howardteets

1st see above post.

If you still want to do it..... A nice broad tip flat head screwdriver and a hammer work well to. Brass is preferable (it doesn't spark). I have rarely used a service tool to change a fuel pump.

olddragger

iTrader: (3)

second that---i used a VERY dull old 1 1/2 inch wide chisel and a rubber hammer---works great
the ring has small holes in it that you can fill up with wd 40 also. that fills the thread area from the inside and it can help a little. I will demo at Mazmart Saturday.
OD

swoope

iTrader: (5)

kevin,

cover the shipping and i will send you the proper tool.. denny the tool will be with me at mazmart.

howard, look for some pm from me on monday!

beers

Nemesis8

iTrader: (3)

Shipping is no problem for me - talk at you later next week. Steal me an engine while your at Paul's would 'ya?

DOMINION

Wheres expo1's pix?

swoope

iTrader: (5)

sense of reason.. we were going to do it later in the day, and time ran out.. i gave him the tool to do when he got home and made a joke about me needing it on my way home..

well.. enough time passed. i pictured me in shorts in 40deq weather with a new fuel pump sitting in the trunk and not being able to change it..

well, i came home with the tool. i will ship it to him on monday..

btw, made it home fine. frankenpump did good.. no issues.

btw, mpg up to 22.5. clogged sock bad..

beers

alz0rz

iTrader: (41)

how does a clogged fuel pump affect mileage?

even if the pump had to work harder to get the fuel to the engine.. wouldn't it still inject the same amount?

DOMINION

It will affect it cuz you have to push more on the gas just to go faster. Its like a dirty air filter.

swoope

iTrader: (5)

my guess it getting accurate fuel trims..

beers

ASH8

Just thought I would chime in here.....

The 09 Fuel pump has a replaceable sock (well there is a part # for it now, Series 1 did not show one).

I can not confirm it but I am almost certain it is the same sock used in the Series One RX-8, the reason I say this is the 09 Part Number is LFB6-13-ZE1, which is also used on the following Mazda's..

2005 Mazda 2
2006 CX-7
2007 6 and MPS
2005 MX-5 (NC)
2009 (MY) RX-8

OD, what happen to the 09 pump you were going to look at at mazmart?

olddragger

iTrader: (3)

and the pump is now a denso pump wereas before they were not.
OD

swoope

iTrader: (5)

ok,

today i was getting my car ready for a track day..

took out the franken pump.. and the pick up on the other side of the tank.. wiped the whole tank down.. it was almost dry. let it idle till it ran out of gas.

well. not a whole lot of stuff showed up on the microfibe towel i used. really almost nothing..

note, i have not premixed since the beginning of jan. have just been using a little fp+..

photo of both sides of the sock follow.. overall am happy, yes it cranks longer..

the truth will come out on the track next weekend.. btw, frankenpump 2.0 was also built today. it will be along for the test. as will a brand new stock pump..

so i have the above freakshow with the new sock exposed to the tank. 2.0 is another pump i have with the pump rotated a bit and the sock enclosed in the fuel bucket.

and a brand new pump..


sock photos.. the sock looks damn good..






beers

OnRails

So you store your sock and shifter together?

Hopefully I'll be trying out an 09 pump at TGPR.

olddragger

iTrader: (3)

will be interesting. and good work man
OD

Mazurfer

Am keeping an eye on this thread and have been.

swoope

iTrader: (5)

it was a multi project weekend.. and two did not get finished.

beers

PRX8

what is the conclusion ?

olddragger

iTrader: (3)

well the 09 fuel pump worked for me down to 3 clicks from empty Worked well for me.
olddragger

swoope

iTrader: (5)

this pump that was know to be bad. and would start to fail at 3/4 tank on the track made it to 1/2 tank before a fuel cut would happen..

but it did fine on the 9 hr drive on the way home.. so it did a lot of good.

i am going to do the same configuration with a brand new pump first weekend of may at robeling road.

beers

rotaryPilot

well I read all the pages and I came to the conclusion that the premix used by swoope was not the appropriate.

Is this wrong conclusion?

If yes can someone post what is the conclusion of the story? Not to premix?

swoope

iTrader: (5)

this car had all kinds of different 2 stroke oil in it in its first years.. it has taken a while to get it out. i have done several tank cleanings, and all is going well..

the pump above was replaced with v2 which is running the same sock, but inside the bucket.

it goes to the track sat. this is the pump killing left had turn track..

and as you are searching to find the perfect premix. no real answer will be know till a controlled study happens. it is just good guesses. educated yes, but guesses.

the two that i have done that i would recommend.

mmo 6 to 8 oz street. double for track.

indemsu 4 oz with 2 oz of fp plus street. 8 oz indemsu on track.. no ft plus.

just what i have done..

beers