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

takjak2 11-03-2011 04:49 PM

Quote:

Originally Posted by phunk (Post 1390308)
the product is rather comparable to our twin fuel pump assembly... and we want to price it in around the same area.

Listed at $845 for comparison

spearfish25 11-05-2011 10:43 AM

Pricing is going to be key here. Price it too high and it'll be a 'dead' product. Find a way to make it affordable and you could reap the benefits with the number of potential sales it would generate. If it could be done for $400-500, it would sell like hotcakes.

Ron 11-05-2011 03:46 PM

^^ Yes, people that don't track will get it

travisjb 11-05-2011 05:15 PM

might need two versions... from the looks of his prototype, materials alone are going to be $300+

SPOHN 11-05-2011 06:52 PM

Quote:

Originally Posted by takjak2 (Post 1390480)
Listed at $845 for comparison

I feel that would be well worth it.

Phunk, would there be any warrenty offered? A product of this nature as long as it's installed correctly probably wouldn't have any issues.

phunk 11-06-2011 12:39 AM

I can't say a whole lot today because I am currently out of state on vacation... But last week while going thru updates to the cad and programming in preparation for production, we came up with several theoretical improvements that, if work out, will turn installation into a quick PnP with almost no installation support components required. This may allow us to put the pricing more in the customers favor. When I am back in the office Monday we are going to put it through our theoretical brainstorming and try to find flaws with these changes. But I think it will work, and doesn't require starting from scratch so won't set us back more than a week to make the changes. I think that one way or another, machining will begin this coming week.

SPOHN 11-06-2011 07:25 AM

^ sounds great.

ValidusVentus 11-10-2011 10:46 AM

eagerly awaiting further news :excited:

clintfocus 11-16-2011 03:53 AM

^same

Zat_Zuma 11-16-2011 11:26 AM

ditto ...... M/C on stand-by

phunk 11-16-2011 03:20 PM

well... so we have the test prototype which is so far working, and everything here to build like 20 more... but then in SolidWorks here I have progress on a version that I believe will be significantly easier to install, able to price quite a bit less, less complex in its overall layout and plumbing, and possibly more effective in function.

how long do i make you guys wait? R&D is a bitch!

wstar 11-16-2011 03:41 PM

Given we're about in winter now, I'd rather just wait for the better version :)

SPOHN 11-16-2011 04:10 PM

I'm in no rush but would like to have come Feb. I have a lot of plans then and this would fall into it.

ChrisSlicks 11-16-2011 04:48 PM

Quote:

Originally Posted by phunk (Post 1410729)
well... so we have the test prototype which is so far working, and everything here to build like 20 more... but then in SolidWorks here I have progress on a version that I believe will be significantly easier to install, able to price quite a bit less, less complex in its overall layout and plumbing, and possibly more effective in function.

how long do i make you guys wait? R&D is a bitch!

There are 2 sides to that coin obviously. You can perfect stuff forever and sell nothing, or sell something that works but in your heart you know isn't the best that it could be. Usually the happy line is somewhere in the middle :)

Personally I'm off track the next 3 months for the Winter.

sig11 11-16-2011 04:59 PM

I'm really hoping for something to be installed early April since the 15th looks to be my first track day of the year. Finding someone to install it may be tough too. :P

Mike 11-16-2011 07:44 PM

after next weekend, I'm done til spring along with just about everyone else, so you still have a couple of good months.

I'm just patiently waiting. I've got a 15 gallon gas can I take to the track with me, and I can almost always get through a full session if I top off, so its more of an annoyance than anything else.

clintfocus 11-17-2011 02:05 AM

i live in socal so track season is year round :D

phunk 11-17-2011 01:02 PM

ive been in CAD all day. I am going to finish up the new version. It just makes too much more sense than the existing prototypes. Its more configurable as I can set it up as a twin or triple pump setup too, so it can support major HP as well. This means that once its done, we will have 5 different levels/options of fuel sending unit combinations for HP between stock and over 1000rwhp with and without surge protection. I like that this new design I am working on can be reconfigured at any time to fit any of these applications. To me, that sounds amazing.

Once I am done with this project I can sort out a couple plumbing kits. We already have billet VHR rails, but I want to add a new feature to them. Then I can build a couple plumbing kit options and we will be done with the fuel system product line with absolutely everyone covered. From road racing to drag racing to street racing to any HP level with return or returnless configurations.

SPOHN 11-17-2011 01:19 PM

Street racing. Who does that?:ugh2: :icon17:

Zat_Zuma 11-17-2011 02:06 PM

That's the news I wanted to hear ...... March/April completion? :tup:

Quote:

Originally Posted by phunk (Post 1412249)
ive been in CAD all day. I am going to finish up the new version. It just makes too much more sense than the existing prototypes. Its more configurable as I can set it up as a twin or triple pump setup too, so it can support major HP as well. This means that once its done, we will have 5 different levels/options of fuel sending unit combinations for HP between stock and over 1000rwhp with and without surge protection. I like that this new design I am working on can be reconfigured at any time to fit any of these applications. To me, that sounds amazing.

Once I am done with this project I can sort out a couple plumbing kits. We already have billet VHR rails, but I want to add a new feature to them. Then I can build a couple plumbing kit options and we will be done with the fuel system product line with absolutely everyone covered. From road racing to drag racing to street racing to any HP level with return or returnless configurations.


phunk 11-17-2011 02:28 PM

Still in CAD... its nearing completion in design. I am pretty sure that unless something comes up that means I have to stop CAD for more than a hour, I will have it done sometime tomorrow... then we can get it in the CNC

ValidusVentus 11-17-2011 03:05 PM

:tup::excited:

O&G 11-17-2011 03:43 PM

woot!

phunk 11-17-2011 04:50 PM

its so very close, having a lot of difficulty squeezing in the triple pump accomodations... but i really want to try and get them in there

ValidusVentus 11-17-2011 06:51 PM

The ability to be able to tailor the product exactly to the application is indeed a very cool achievement. Nice job!

FL 4Motion 11-17-2011 08:27 PM

Quote:

Originally Posted by phunk (Post 1410729)
well... so we have the test prototype which is so far working, and everything here to build like 20 more... but then in SolidWorks here I have progress on a version that I believe will be significantly easier to install, able to price quite a bit less, less complex in its overall layout and plumbing, and possibly more effective in function.

how long do i make you guys wait? R&D is a bitch!

I'm of the philosophy of buy the best and buy once, so if you guys have a better design, then I'd rather wait and get that instead.

Kirkster 11-26-2011 11:13 PM

Just ran my car out of fuel on a long high G right hander. Had 3 dots then had the engine stutter and call it quits. Did not want to re-fire. I am guessing it vapor locked. Sitting on the side of the highway for 30 minutes waiting for the wife to bring me gas was not the most fun I have had in a while.

Keep us updated. I am definitely in for a solution.

SPOHN 11-27-2011 05:22 AM

Yep I had this yesterday. My car was three dots past a 1/4 of a tank. I was going down hill a long right hander and had no throttle for about five seconds. Went around the next and the car shut off for about five mins before I could get it restarted. I just then limped it back. So sad.

I will buy this.

Shamu 11-27-2011 01:49 PM

I had my first experience with fuel starve issues at lacuna Seca. Turn 4 and turn 10 caused the issue. I was about 6 gallons down from full tank.

I noticed www intengineering com has a universal surge tank pump. Anyone using that one?

Mike 11-27-2011 06:54 PM

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 11-27-2011 06:56 PM

Quote:

Originally Posted by Shamu (Post 1425099)
I had my first experience with fuel starve issues at lacuna Seca. Turn 4 and turn 10 caused the issue. I was about 6 gallons down from full tank.

I noticed www intengineering com has a universal surge tank pump. Anyone using that one?

some of the guys talked to the Nissan pro driver at Petit Lemans, and they are running a second fuel pump in the other side, I believe. I got there a little late for the details, but I do recall hearing it was a volvo pump or something.

Right now, since after today I am done until spring, I'm waiting to see CJs solution.

travisjb 11-27-2011 08:23 PM

that's the setup i'm using... plus a 3rd fuel pump at rear of tank... plus baffling... like i've said before, it is good for getting down to ~6 gal

Quote:

Originally Posted by Mike (Post 1425404)
some of the guys talked to the Nissan pro driver at Petit Lemans, and they are running a second fuel pump in the other side, I believe. I got there a little late for the details, but I do recall hearing it was a volvo pump or something.

Right now, since after today I am done until spring, I'm waiting to see CJs solution.


travisjb 11-27-2011 08:24 PM

(lack of) accuracy of the fuel gauge would explain it

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 11-27-2011 09:00 PM

Quote:

Originally Posted by travisjb (Post 1425492)
that's the setup i'm using... plus a 3rd fuel pump at rear of tank... plus baffling... like i've said before, it is good for getting down to ~6 gal

speaking of which, I got these tires back in September, and they don't clear my control arms without spacers. I've been wondering for 2 months how they fit on your car and not mine, and I got your specs on my forgestars, then just yesterday I realized they aren't on my forgestars, just my 350z wheels! doh!

takjak2 11-28-2011 11:11 AM

This is killing me at VIR

phunk 11-28-2011 12:39 PM

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.

If anything, I would say that may be a sign you are going faster. To "achieve" the problem at a higher tank level could be a sign that you are losing fuel to the drivers side of the tank worse due to a harder right turn, and the fuel system isnt recovering as quickly.

our solution not only uses the rather decent fuel surge can to prevent the engines fuel pump from momentarily starving, but it also adds another siphon to transfer fuel back to the pump side of the tank... and its quite a bit more powerful than the stock siphon... so with them both working together the recovery of the fuel to the pump side of the tank will be more than twice as quick.

the new design is like 95% done from last week. I just have to sort out this one bracket setup for installation and we are ready to build a test unit or two.

who is going to be racing continually that we can work out a testing deal with now since winter has shut down many of you guys until spring?

SPOHN 11-28-2011 12:49 PM

Need some guys from FL (Travis). lol. I believe they still have track days year around down there.

travisjb 11-28-2011 03:29 PM

Quote:

Originally Posted by SPOHN (Post 1426194)
Need some guys from FL (Travis). lol. I believe they still have track days year around down there.

I would offer up my car but it already has another system installed... and it'd be a good amount of work to pull the old system and test this one... e.g., my fuel tank has 'baffling' inside it now to control fluid movement, so any testing we do would not be 100% applicable to other cars

Also, when it emerges from jnaut's shop end of next week, we are already going to have a lot of changes (GTM St 2 SC) - so might be better to use a vehicle that is a bit more stock... e.g., SC changes the voltages to the fuel pump etc

If none of those are a concern and you want to work something out, I'm happy to talk. Should have 2-3 track events between now and end of Jan

jr1 11-28-2011 04:33 PM

I'll be running pretty consistently in the upcoming months. Located in Norcal. Possibly running buttonwillow 12/11-12, will be driving T-hill early January. T-hill is definitely not the ideal track for testing this as there is only one turn where I consistently have starvation issues but Buttonwillow and the others around here should be good.

FL 4Motion 11-28-2011 08:11 PM

Quote:

Originally Posted by phunk (Post 1426183)
If anything, I would say that may be a sign you are going faster. To "achieve" the problem at a higher tank level could be a sign that you are losing fuel to the drivers side of the tank worse due to a harder right turn, and the fuel system isnt recovering as quickly.

our solution not only uses the rather decent fuel surge can to prevent the engines fuel pump from momentarily starving, but it also adds another siphon to transfer fuel back to the pump side of the tank... and its quite a bit more powerful than the stock siphon... so with them both working together the recovery of the fuel to the pump side of the tank will be more than twice as quick.

the new design is like 95% done from last week. I just have to sort out this one bracket setup for installation and we are ready to build a test unit or two.

who is going to be racing continually that we can work out a testing deal with now since winter has shut down many of you guys until spring?


well crap, our car will be running at daytona this Fri and Sat, not enough heads up...:(


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