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Home > Help Needed / General Tech Chat > Please help before I set fire to my car! | |||||||
33 Posts Member #: 11676 Member |
13th May, 2018 at 08:48:54pm
Hi all, here to tap into your collective wealth of knowledge. I have a few problems which may or may not be related, I'm drawing a bit of a blank on
Edited by Ben5004 on 13th May, 2018. |
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9311 Posts Member #: 59 First mini turbo to get in the 12's & site perv Herefordshire |
13th May, 2018 at 09:25:07pm
Do you have the correct preload on the actuator?
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238 Posts Member #: 11017 Senior Member Shropshire |
13th May, 2018 at 09:37:58pm
Sounds like a lack of preload if the actuator is opening with stationary revving |
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33 Posts Member #: 11676 Member |
13th May, 2018 at 09:42:53pm
To the best of my knowledge there isnt a boost leak, intercooler is new, pipework new ally hard pipes, it has proper boost clamps around new silicone joiners. I can't hear any sounds of escaping boost pressure, I'd expect to hear or feel some sort of whooshing or hissing from somewhere even with just the 2psi
Edited by Ben5004 on 13th May, 2018. |
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33 Posts Member #: 11676 Member |
13th May, 2018 at 09:44:13pm
It's preloaded Steve220, could it just be weak? |
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Forum Mod 10979 Posts Member #: 17 ***16*** SouthPark, Colorado |
14th May, 2018 at 03:09:28am
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=6298
Edited by TurboDave16V on 14th May, 2018. On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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3569 Posts Member #: 655 Post Whore Northern Ireland |
14th May, 2018 at 02:00:03pm
On 13th May, 2018 Ben5004 said:
Hi all, here to tap into your collective wealth of knowledge. I have a few problems which may or may not be related, I'm drawing a bit of a blank on 1) boost, lack of it. Raises to 2psi on the gauge then no more, this is either giving it a big rev while stationary or working the engine, uphill. Gauge is a vacuum/boost gauge, shows vacuum OK when running, and I can make it show full 'boost' with an airline. Dump valves dumps when throttle shuts. Turbo is good i can spin the impellor by hand. The actuator can be seen to move the waste-gate arm slightly by giving the engine a hard rev, so wastegate presumed OK (I.e not stuck open) Or should it not be moving it until it's under proper load, I.e weak actuator? 2)fuel pressure. I am running a metro turbo pump with sytec filters fore and aft, with the regulator set at 5psi at idle. It only creeps up a little with boost, but i think this is due to the previous query about not making much boost. Reg is a new Malpassi as per o.e. and 5/16"/8mm flow, 10mm return hoses. With the pump running, fuel would escape from the breather tail next to the fuel-in tail on the carb. (Or it would if it wasn't blanked off.) Is my fuel pressure too high and do I need to install a pressure switch to knock the pump off when it reaches desired pressure? Or is fuel pressure ok and its just a case of the float valve not shutting properly? 3)which may be related to 2...the car will idle all day long, will rev cleanly, and drive well (albeit with little boost showing) for the first two to four minutes say. It will then cough and die with what feels like fuel starvation, or a similar feeling to it having and air leak, but it will only do it after a bit of driving. Im going to swap the coil just to eliminate it, because im kind of clutching at straws a bit now. The only other thing is where I've put the fuel lines, across the bulkhead behind the carb/plenum, (it's a Metro...) are they likely to be getting heat soak from the turbo? They are stainless braided, and the turbo has a heat-blanket on, could they still be getting too hot and vapourising the fuel? What is more annoying is the engine was bought having been run and driven in a mini based buggy, where it went like holy-hell and made around 12psi. It was, and is intercooled, I've just piped it to fit my application. The fuel pump and pressure reg are the same parts, again plumbed to fit my application. It's a 1380 with a T3, a dialled in Avonbar Phase 2 cam, head work etc etc all as it was when it was in the other car. Sorry for such an essay, I'll stick a bob or two in the funds pot! 1. The actuator should never see enough boost with the car stationary to operate or move at all. That is a problem. 2. Sounds like your needle valve is not sealing, fuel should not be escaping anywhere other than the actual dashpot needle/jet ! No idea which Sytec filter you refer to, but I know some of them are crap, and not suited at all to running in front of a fuel injection type pump. Although that is not the problem you're having here. But if fuel is escaping there, then it's probably dumping huge amounts out via the needle too...which is messing up everything with regards fueling. No sense worrying about 3 until 1+2 are resolved...which will probably fix 3. 9.85 @ 145mph
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33 Posts Member #: 11676 Member |
14th May, 2018 at 05:10:06pm
Cheers TurboDave16v and stevieturbo for your suggestions, so the general consensus is that it's too much fuel rather than too little, and the wastegate actuator needs more preload/is weak. Its presumably a stock actuator, its the zinc-plated steel body type of affair, certainly not a fancy alloy one or anything like that.
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33 Posts Member #: 11676 Member |
14th May, 2018 at 07:03:26pm
OK fuel pressure tweaked down to 3psi👍
Edited by Ben5004 on 14th May, 2018. |
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3569 Posts Member #: 655 Post Whore Northern Ireland |
14th May, 2018 at 10:53:17pm
OEM actuator is soft...although yours sounds a little too soft.
9.85 @ 145mph
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33 Posts Member #: 11676 Member |
14th May, 2018 at 11:11:11pm
I've popped a pic on of the preload, around 3-4mm thereabouts, the waste gate is closed in the pic.
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4619 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
15th May, 2018 at 08:51:37am
Have you completely removed the needle valve assembly ? There's a little gauze filter attached to it that can easily clog. I just removed mine and used a suitable filter in line.
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33 Posts Member #: 11676 Member |
15th May, 2018 at 09:52:01am
I have Phil yeh I took the whole thing to bits, float out, valve and the brass seat thing out. There was a little bit of muck or something in the valve seat bit, but the guaze was pretty clean 👍 |
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3569 Posts Member #: 655 Post Whore Northern Ireland |
15th May, 2018 at 10:59:50pm
Fuel is always circulated from tank, pump to FPR, then back to tank, the carb only takes off/uses what the engine needs. 9.85 @ 145mph
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33 Posts Member #: 11676 Member |
19th May, 2018 at 03:09:09pm
Hi all, me again 😂
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33 Posts Member #: 11676 Member |
19th May, 2018 at 03:37:23pm
First filter between tank and pump |
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33 Posts Member #: 11676 Member |
19th May, 2018 at 03:38:48pm
Pump |
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33 Posts Member #: 11676 Member |
19th May, 2018 at 03:39:51pm
Filter between pump and carb |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
20th May, 2018 at 12:35:37am
Whats the filter before the pump for? What type of fuel tank are you using? On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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3004 Posts Member #: 2500 Post Whore Buckinghamshire |
20th May, 2018 at 05:34:33am
I always used a pre-pump filter to protect the pump from anything coming from the tank and never had a problem.
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33 Posts Member #: 11676 Member |
20th May, 2018 at 08:03:56am
It's the standard metro steel tank under the car, with a return added from the reg. Pre-filter just to stop and rust/muck/debris getting sucked out the tank and through the pump |
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4619 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
20th May, 2018 at 08:43:27am
Is the pump mounted below the level of the tank ?
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33 Posts Member #: 11676 Member |
20th May, 2018 at 10:44:10am
The pump is in the spare wheel well Phil |
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4619 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
20th May, 2018 at 01:52:34pm
The pump needs to be mounted below the tank. They're gravity fed.
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Site Admin 15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
20th May, 2018 at 04:17:12pm
As Phil says. Also pre filter unions look too small, the metro pipe from tank to filter was pretty large.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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