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-   -   Fuel starvation, who else? (http://www.the370z.com/track-autocross-drifting-dragstrip/9674-fuel-starvation-who-else.html)

phunk 11-29-2011 12:45 PM

^^ I think we will only be just beginning the process of building the prototype this weekend anyway. I have a few bread and butter products I have to get through the CNC for the next few days to pay the bills first.

I was able to finish the CAD yesterday. So we are ready to start writing machine programs for hopefully the last and final version of this.

Shamu 11-30-2011 07:08 AM

I'm working on 370 z specific fix as well. Will keep everyone updated. Think I have found good surge pump.

nismo09 12-02-2011 09:05 AM

Quote:

Originally Posted by Mike (Post 1425401)
Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend.

Whats up with that? I'm not driving any slower.

Mike, you are just getting smoother on you inputs. Seat time is a beautiful thing. :tiphat:

FL 4Motion 12-02-2011 09:42 PM

FYI, wifey finished day 1 of a two day track event at Daytona today. She got fuel starve at 6 dots down from full in the last right hander coming out of the infield.

Edit: still on stock nismo suspension running PS2 tires.

Kirkster 12-12-2011 05:37 PM

Bump

wolf370z 12-19-2011 06:37 AM

I too have also gotten fuel starvation problems while tracking the car. Happened on turn 1 of VIR on the cool down lap for a 30 minute session. I started at half a tank of gas, so I was probably around a 1/4 tank when it happened. My personal solution is to just not go out at 1/2 tank or less. It would have been really embarrassing to get towed off for that :ugh2:

SPOHN 12-19-2011 07:01 AM

I'm hoping to see something come february. Phunk seems to a very meticulous so we know we'll be getting a great product.

ChrisSlicks 12-19-2011 07:16 AM

Hmm, I was replacing a leaky full tank in another car this weekend and it made me think of this. It was a smelly messy job, just be glad we don't have to drop the tank!

ValidusVentus 12-19-2011 05:31 PM

Got towed off the track the 1st session of my 1st track day for this reason... heh. It was embarrassing. Went out at half tank. Just glad I didn't fry my fuel pump trying to restart it.

phunk 12-19-2011 06:38 PM

ya we are currently working on replacing the spindle drive on the CNC we use for automotive parts (our other CNC is pretty much dedicated to injection mold building, we rarely have any down time with it to run car parts or prototypes).

for months we have had a problem where the spindle would fault when braking for a tool change, it was no big deal when it happened because it wasnt all that frequent and all it meant was reseting the spindle drive and rerunning the part.. so just 10-15 min wasted when it happened. But satuday it got worse. Twice the spindle drive faulted in the middle of cutting... and to loose spindle power while running a 1" cutter a half inch deep in aluminum means expensive tooling getting sheared right off. so now we can not run the machine at all because its at risk of destroying a tool every time it faults, and its faulting left and right all of a sudden. we went through the entire spindle and motor and encoder setup today and everything looks great so tomorrow we have to get a replacement spindle drive on the way... should only take a day or two to get here and a hour or two to swap out. if that gets us back online we can continue cutting parts.

phunk 12-19-2011 06:58 PM

but the entire product has been redesigned since the initial prototype. it is operating under the same theory but its all happening in different spots to make installation way way more clean and simple and also, like i was mentioning before, redesigned to accomodate some variations in setup. there are several configurations that it can be run in and adjustability is always cool. it will have a standard/basic recommended configuration that we believe will be the best and most well rounded. matter of fact it really only runs one or two ways for anyone thats at a HP level requiring just a single pump... so all the multi-configuration stuff will only be concern of the mad scientists working on rediculous HP levels.

ive been really pushing to get this thing done. i spent a lot of time in CAD and i really just want to hold the thing in my hand and say "DONE", not to mention clean my desk of all the related crap from R&D and consider it a finalized product. our CNC failure has come at a very unfortunate time, hopefully resolved this week as planned.

FL 4Motion 12-19-2011 07:12 PM

Quote:

Originally Posted by phunk (Post 1456015)
but the entire product has been redesigned since the initial prototype. it is operating under the same theory but its all happening in different spots to make installation way way more clean and simple and also, like i was mentioning before, redesigned to accomodate some variations in setup. there are several configurations that it can be run in and adjustability is always cool. it will have a standard/basic recommended configuration that we believe will be the best and most well rounded. matter of fact it really only runs one or two ways for anyone thats at a HP level requiring just a single pump... so all the multi-configuration stuff will only be concern of the mad scientists working on rediculous HP levels.

ive been really pushing to get this thing done. i spent a lot of time in CAD and i really just want to hold the thing in my hand and say "DONE", not to mention clean my desk of all the related crap from R&D and consider it a finalized product. our CNC failure has come at a very unfortunate time, hopefully resolved this week as planned.

/\ keep up the good work, I know a lot of us have been anxiously waiting for y'all to release this product, but I for one, appreciate that you are not rushing something to market and are instead perfecting it and making it even better prior to release. :tup:

ValidusVentus 12-19-2011 07:35 PM

/\ Agreed.

SPOHN 12-20-2011 05:36 AM

Many props Phunk. Don't get to bent out of shape. It will defiantly be a product to be proud of.

clintfocus 12-20-2011 09:18 AM

thanks for the update! still interested here!

ZForce 12-20-2011 09:32 AM

It happened to me on the street the other day. RH sweeper on ramp to freeway with gas guage at one notch above 1/4 tank. On the exit the car went into a sputter, I was able to feather it without having to pull over. Noticed the gas guage had gone to one notch below the 1/4 mark. After the car sat for 30 min the gas gauge was back to one notch above the 1/4 mark. Took out the bros Z with 3/4 tank of gas to the same on ramp and no issue with sputtering out.

ValidusVentus 01-09-2012 09:35 PM

still interested

pyrrhus17 01-10-2012 12:45 PM

I am really looking forward to this but Please dont RUSH it COMPLETE it ! Thanks for all the hard work !!!!!!!!!!!!!!

spearfish25 01-13-2012 01:08 PM

No one is rushing...this thread has been going on for months now. I just hope it all comes to fruition instead of petering out to another dead end unfinished product. UPDATES!!!!

MightyBobo 01-13-2012 01:11 PM

Heh, so I was driving home on a VERY low tank not long ago. And I get the dumb idea to take a nice, sharp right hand off-ramp. Overall, its a 270 degree turn. Sure enough, I hit the top, and the car was D-E-D dead. Luckly, I kept my clutch pressed in and just coasted 500 feet in front of me to the gas station immediately off the thruway, right up to the pump. Worked out well :)

Im sure I would have been ok had it not been for the looooong right-hand off ramp that I took way too fast while I was low on gas.

phunk 01-14-2012 04:07 PM

Quote:

Originally Posted by spearfish25 (Post 1488835)
No one is rushing...this thread has been going on for months now. I just hope it all comes to fruition instead of petering out to another dead end unfinished product. UPDATES!!!!

Trust me this is not going unfinished... We have too much time into it. I am currently revising it again to accommodate the new walbro 400lph pumps as an option. This means we can ignore a triple pump option altogether and walbro is also close to releasing a true e85 compatible version of the 400.. Which means longer life span expectancy for e85 users.

Since we didn't finish it for last fall we are taking the time to refine it further for an early spring release. There are also other new 370 parts we are planning to release shortly after, so we having many dishes we are working on at once. We may appear silent from the outside right now but we are trying to play the sleeping giant at the moment.

FL 4Motion 01-14-2012 04:22 PM

Quote:

Originally Posted by phunk (Post 1490223)
Trust me this is not going unfinished... We have too much time into it. I am currently revising it again to accommodate the new walbro 400lph pumps as an option. This means we can ignore a triple pump option altogether and walbro is also close to releasing a true e85 compatible version of the 400.. Which means longer life span expectancy for e85 users.

Since we didn't finish it for last fall we are taking the time to refine it further for an early spring release. There are also other new 370 parts we are planning to release shortly after, so we having many dishes we are working on at once. We may appear silent from the outside right now but we are trying to play the sleeping giant at the moment.

:excited:

clintfocus 01-14-2012 04:44 PM

thank you for the update!

SPOHN 01-14-2012 04:55 PM

:excited:

takjak2 01-15-2012 04:57 AM

:D

M.Bonanni 01-15-2012 01:04 PM

Would be nice to have something available before the start of the 2012 racing season...just saying....

Megan370z 01-15-2012 04:20 PM

Quote:

Originally Posted by M.Bonanni (Post 1491155)
Would be nice to have something available before the start of the 2012 racing season...just saying....

agree with that !

SPOHN 01-15-2012 04:33 PM

My first race is March 12

_ace_ 01-15-2012 05:17 PM

I thought this would be a track issue only, and I've had the problem there at half a tank, but I also had a big issue with this on the street yesterday and a small issue with it last summer. The stock fuel system design is really lousy on this car.

Yesterday I had just over 1/4 tank of fuel (5 dots) indicated. Getting off an offramp on the way home, I have a long, tight 200 degree right turn. At around 30mph, I took it at close to the limit of the tires (at 28F - so not terribly fast) at part throttle in 2nd. The corner lasted about 3 seconds. The car lost all power at the end of the corner due to starvation.

I rolled to a safe spot and stopped. I tried to restart. Nothing - it tried but couldn't get any gas. The fuel gauge read 2 dots as soon as the car tried to restart, so I'm wondering if the earlier five dot reading was incorrect. And now, when it wouldn't start, the car still estimated over 100 miles to empty. I ended up getting a ride home and coming back with a gas tank. After adding a gallon or two it started right up.

I also had the issue once climbing a canyon road. It was a very steep grade, maybe 10-15 degrees, and with an indicated 1/4 tank, the car lost all power (starved) anytime I pointed the front end up the hill. I kept it in gear, rolled a u turn, and rolled more until fuel reentered the lines. I filled up the tank, came back, and climbed the hill with no issues.

spearfish25 01-15-2012 06:10 PM

Quote:

Originally Posted by phunk (Post 1490223)
Trust me this is not going unfinished... We have too much time into it. I am currently revising it again to accommodate the new walbro 400lph pumps as an option. This means we can ignore a triple pump option altogether and walbro is also close to releasing a true e85 compatible version of the 400.. Which means longer life span expectancy for e85 users.

Since we didn't finish it for last fall we are taking the time to refine it further for an early spring release. There are also other new 370 parts we are planning to release shortly after, so we having many dishes we are working on at once. We may appear silent from the outside right now but we are trying to play the sleeping giant at the moment.

Good to hear. I have $$ in hand, so let me know when it's ready!

SPOHN 01-17-2012 05:35 PM

Quote:

Originally Posted by spearfish25 (Post 1491572)
Good to hear. I have $$ in hand, so let me know when it's ready!

Mine has already burned a hole threw two pockets

phunk 01-17-2012 07:47 PM

Made a big change, waiting for a part to show up Thursday, I'm excited now

SPOHN 01-17-2012 07:51 PM

:tup:
Quote:

Originally Posted by phunk (Post 1495086)
Made a big change, waiting for a part to show up Thursday, I'm excited now

That sounds good. The suspense is killing me. :tup:

wstar 01-17-2012 08:23 PM

Big change -> he has secretly replaced the fuel pump with Folger's Crystals. Let's see if anyone can tell the difference.

Rusty 01-17-2012 10:35 PM

:drama:

SPOHN 02-12-2012 04:16 PM

Anything for us?

ChrisSlicks 02-12-2012 08:59 PM

Only 6 weeks to start of race season :)

cossie1600 02-12-2012 09:17 PM

I thought winter never came...

Mike 02-12-2012 09:18 PM

I've decided to convert mine back to a DD and race in NASAs spec Z class in a 350z, so I don't need to worry about this anymore. Probably only one more track day in my 370, hopefully. Depends on how quick my CRZ sells.

takjak2 02-12-2012 09:25 PM

ready to buy


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