Jump to content
SAU Community

Recommended Posts

  • Replies 98
  • Created
  • Last Reply

Top Posters In This Topic

Yes I'd be a bit concerned about a copper tube radiator at the front as well , if it were to rupture without warning hot manifolds and high voltage ignition systems could do the blevey thing .

Guys I have to wonder about running two pressure pumps , ie a small one (adequate) for normal running and a Gorilla one for super duty . I guess the problem then becomes dont forget to switch over at the right time ... The problem I think is a reliable system that somehow fails safe rather than unsafe from a fuel capacity point of view .

With coolers I'd be happier with something made of steel and although its a pain maybe some kind of fan forced one if its not located "out in the breeze" .

Actually just had another thought , is it possiple to have a T piece in front of the pump that can somehow bypass a controlled amount of fuel back to the tank so less volume is doing the roundies from the pump to the rail and back ? More complication and how can you reliably block this bypass when you need it all - another manifold pressure referenced FPR ?

Food for thought , cheers A .

I have already made money available to buy a fuel cooler as part of my fuel upgrade. I had been watching my mates rotory. It was in a super sudan speedway car. after about 16 laps, the car would go off tune, spit and cough and loose heaps of power. Much time was spent tring to find the problem. Due to the layout of the track, it had a fair amount of light throttle cornering. One day (after being pushed off the track) he was checking for a fuel block and noticed his alloy tank was quite warm~hot. hmmm

Added a davies craig auto cooler! no more problems. The cooler had to be steel to keep the officials happy. They also stated that the cooler was not permitted on the pressure side!!

The car had the same outcome as said above! it was fixed! then it blew a apex seal.. i guess all that lean mixture got to it..

Big pumps and low fuel useage..

afr's started to play up a little again this morning but only after 2.5 hours of driving in very heavy traffic because of a few break downs and traffic... the pump was a little louder but no way near as loud as it would have been previously...

So its much better then it was.. Was also thinking that if there was a front on accident the cooler would get bashed inbetween the intercooler and the air con cooler and once the engine stopped there would not be alot of fuel leakage... im going to speak to the engineer today about it.

I phoned my engineer who is doing my car and he said he has never seen this done before but he cannot see why it would be a problem...

The system is hooked up after the fuel regulator so in a accident fuel is not going to squirt everywhere because its not under high pressure and as soon as the engine stops the fuel flow stops as well.

He said he will think about it a bit more...

another engineer said he would have no issues if its on the return line but would prefer that some decent fittings were used to prevent it from accidently leaking..

Sounds like it might be okay to leave it where it is for now.

If you have a programmable ecu, you should be able to setup an output, so that when cruising/idling, the 044 pump is shutdown, and another smaller (maybe stock pump) is running. but the moment you go above say 3000RPM the output turns off, and the 044 pump comes on.

So set it up, the output is ON for the small pump, off for large one.

Put the 044 through a NC relay, and the small pump on the NO relay, set it up with a timeout delay (So that the NC relay stays open for say 1/2 a second whilst the small pump turns on.)

This way, if you loose power, the larger pump will become the active pump.

With this setup you WILL need a retune.

When running an inline external pump - we always run a bypass around the big pump along with a check vavlve and switch it on when required - either a hobbs or an output of the ECU can be used. This helps by not flowing lots of fuel to front of the car where it is heated.

ive got a hobs pressure switch 9psi i could use...

When running an inline external pump - we always run a bypass around the big pump along with a check vavlve and switch it on when required - either a hobbs or an output of the ECU can be used. This helps by not flowing lots of fuel to front of the car where it is heated.
Running a phenolic gasket between the head and the inlet manifold helps keep the rail cool, provided you do the associated coolant mods too.

www.gizzmoelectronics.com

Surely it would have sealing issues under higher boost. Also whats the good of a phenolic spacer to stop heat from the head when the intake manifold runs coolant through it anyway?

Edited by rob82

Yep i knew that would be mentioned but its just the angle of the pic. It about 300mm part but i think you are correct with the idea about ducting more air to it. It seems to work although can give any figures on whe temp difference there was.

Yea the cooler on the speed way car was on the return after the fuel reg.

The powers at be said pritty much the same as the engineer you spoke to... low pressure, its the hottest point in the system and will not pose any restriction to the fuel flow.

Although they did want it in steel. They were concerned about its ability to be ruptured in an accident.

The car never had an issue after the cooler was added. He mounted the cooler in the boot just before the fuel tank. His thoughts were that the cooler will be in less danger in there! He used a pair of 100mm computer fans for air flow.

I will be following his lead when i put my bigger pump in, and adding the cooler.

the twin pump idea is interesting..

I am going to be running a swirl pot, and using the stanard pump as a lift pump.

I've an 070 which could be used for a primary pump.

thanks for the idea. man my boot is gonna have some plumbing in it!

  • 1 year later...

Ive just dug this up from the dead as im now having the same problems with my 044. When i drove the car for short periods of time the pump was fine, however now it seems to heat up and cause me problems.

The bosch dealer in my case said the relay i used may be causing the problem. "The intermittent noises can be related to low voltage = high current = excessive heat and swelling of the pump armature which will not cause the pump to fail all together but limit its output, (causes shorts in the armature and lowers the pumps terminal rpm)

and/or

starving of fuel pump under surge conditions = wear in the gear set = terminal pump damage and will eventually stop altogether."

I fail to see how everyone running a bosch pump in their boot is going to require some sort of fuel cooler system as the pump is having issues? Anymore opinions or developments from anyone whos posted in here?

Hes pics of my setup anyway. I do think the wire is a bit thin and may be causing a voltage drop. Im also going to change the relay to something a bit meatier. Will post back when i sort out the problem.

post-21312-1229684152_thumb.jpg

post-21312-1229684171_thumb.jpg

post-21312-1229684188_thumb.jpg

Edited by SirRacer

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Yeah, the latter. No diff should have a centre replaced without checking clearances because its unlikely to be the same as whatever came out. Not that that stops most people just checking a new centre in
    • Major thread necro but how bad of a job is it to DIY? Looking at it online it looks like if you reuse your ring and pinion as long as those are in good condition it should be fine to just pull the axles/front cover and replace the diff that way? Or should I be replacing everything and doing preload measurements/gear mesh testing like the factory service manual mentions for the rear diff?
    • in my list I had the R33 GTR as the best Skyline. Infact I had all GTR's (33>34=32), the NSX, the GTO, the 300ZX, the 180SX, the S15 better than the FD RX7. I had the MR2 and the A80 as 'just' better. I also think the DC5R Integra looks better but this is an 01 onwards car. I also think the FC>FD. It's almost like aesthetics are individual! The elements @GTSBoy likes about the FD and dislikes about the 180 are inverse in my eyes. I hate the rear end of the FD and it's weird tail lights that are bulbous and remind me of early hyundai excels. They are not striking, nor iconic, nor retro cool. The GTO has supercar proportions. I maintain these look much better in person (like the NSX) especially with nice wheels and suspension which is mandatory for all cars pretty much. Some (or all) of these you have to see in person to appreciate. You can't write a car off until you see one in the flesh IMO. Like most people we probably just like/dislike cars which represent certain eras of design or design styles in general. I also think the 60's Jag E type looks HORRIBLE, literally disgusting, and the 2000GT is nothing to write home about. FWIW I don't think the Dodge Viper Gen1's have aged very well either. You can probably see where I rate bubbly coupes like the FD. I know we're straying now but the C4 and C5 absolutely murder the Viper in the looks department as time goes on, for my eyes. Wouldn't surprise me if people who love the FD, also love the MX5, Dodge Viper, Jag E Type, etc etc.
    • I used to hate R31s, and any of the other Nissans that led up to it, and any of the Toyotas with similar styling, because of the boxiness. They were, and remain, childish, simplistic, and generally awful. I appreciate R31s a lot more now, but only the JDM 2 door. The ADM 4 door (and any other 4 door, even if they are unique compared to our local one) can eat a bowl of dicks. The Aussie R31 is also forever tarnished by their association with stereotypical bong clutching Aussie R31 owners of the 90s and early 2000s. I think the Nissans of the 70s (other than 120Y/180B/200B) are far superior looking to the 80s cars. The 240K era Skylines are boss. The same is broadly true of Toyotas. Hondas don't ever register in my thinking, from any era. Mitsus are all horrid shitboxen in any era, and so also don't register. Subarus are always awful, ditto. Daihatsus and Suzukis also don't generally register. They are all invisible. I think the SW20 MR2 looks fiddly. The 3000GT/GTO is like that but way worse. Too many silly plastic barnacles and fiddly gimmicks ruined what could have been a really nice base shape. Kinda-sorta looks like a big heavy ST165 Celica coupe (and I'm not sure if that's a good thing or a bad thing). I think the 180SX is dreadfully bland. It's not bad looking. But it has no excitement to it at all. It's just a liftback coupe thing with no interest in its lines, and bad graphical elements (ie wide expanses of taillight plastic on the rear garnish). The S13 Silvia is a little better - getting closer to R32 shapes. But still....bland. S14? Nope. Don't love it. S15...a little better. Probably a lot better, actually. Benefits from not being like a shrunk in the wash R34 (where the S13 was a shrunk in the wash R32 and the S14 looked like a Pulsar or something else from the stable on Nissan mid 90s horrors). The Z32 was hot as f**k when it came out but hasn't aged as well as the A80. Keep in mind that I think the R33 is the most disgusting looking thing - and out of all the previous cars mentioned is objectively closest to my precious R32. It's just....real bad, almost everywhere you look. And that is down to the majority of what was designed in the 90s being shit. All Nissans from that era look like shit. Most other brands ditto. In that context, the FD absolutely stands out as being by far the best looking car, for reasons already discussed. Going behind the aesthetics, the suspension alone makes it better than almost any other car.  
    • If they just called it the "Mazda Tiffany", it would have been spot on.
×
×
  • Create New...