 Fuel accumulator?, Trouble at tight corners |
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| worn |
 Aug 10 2014, 05:16 PM
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#1
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Winner of the Utah Twisted Joint Award  Group: Members Posts: 3,492 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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Today at an autocross meet the car was doing great. EXCEPT that after a sharp curve there was a delay in getting power, with he engine running lean. We were running a half tank or less to save on weight and it was suggested that the problem was fuel starvation after a sharp turn.
Having looked inside the tank it don't seem so awfully likely, but it does fit the symptoms. Driving back on country roads I went across several 90 degree bends, and the same durn thing happened! (IMG:style_emoticons/default/hissyfit.gif) Any thoughts? |
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| Mike Bellis |
Aug 11 2014, 06:35 PM
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#2
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Resident Electrician Group: Members Posts: 8,347 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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I would start with a new higher volume FI pump. A fuel accumulator requires a tank and a secondary fuel pump. There should be no need for an accumulator at your HP level. You should also replace the pressure regulator.
Also make sure your supply and return in the tank are not reversed. Do you have this problem with a full tank? BTW, I'm running a single pump in the front and a +300hp turbo motor and don't have this issue. |
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| SirAndy |
Aug 11 2014, 08:34 PM
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#3
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Resident German Group: Admin Posts: 42,258 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Mike Bellis @ Aug 11 2014, 05:35 PM)  Do you have this problem with a full tank? (IMG:style_emoticons/default/agree.gif) I would start there. If it still happens with a full tank something else is going on. If it is related to fuel level in the tank, you could try to add some baffle to the tank. That would require opening the tank but should work well enough. (IMG:style_emoticons/default/smile.gif) |
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| worn |
Aug 15 2014, 08:11 PM
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#4
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Winner of the Utah Twisted Joint Award Group: Members Posts: 3,492 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(SirAndy @ Aug 11 2014, 06:34 PM) QUOTE(Mike Bellis @ Aug 11 2014, 05:35 PM) Do you have this problem with a full tank? (IMG:style_emoticons/default/agree.gif) I would start there. If it still happens with a full tank something else is going on. If it is related to fuel level in the tank, you could try to add some baffle to the tank. That would require opening the tank but should work well enough. (IMG:style_emoticons/default/smile.gif) I guess I was wondering if it had happened to anyone before. It is a relatively new FI set of components, and yes, I think it does depend on fuel level. But this is a tank I treated with rust removers and rotary nuts and bolts. I ran it with a bar b q rotisserie for a couple of days and yes, I did count the nuts and bolts both ways. I was impressed by the baffles already present. Any chance the bucket for the fuel return isn't quite enough? I am running at 32 psi, which is slightly high, and I also notice how the tank is very transverse. It is right at the front wheels, so there is good reason for all of the fuel to migrate left or right. Then after the turn - disappointment! |
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Posts in this topic
worn Fuel accumulator? Aug 10 2014, 05:16 PM
Mike Bellis Carbs or FI? Aug 10 2014, 06:04 PM
worn
Carbs or FI?
A 2056 running stock 2.0 FI. When ... Aug 11 2014, 06:28 PM sixnotfour oops Aug 10 2014, 07:10 PM JamesM The tank already has some baffles in it, adding mo... Aug 15 2014, 08:57 PM Mike Bellis I'm wondering if your supply and return are re... Aug 15 2014, 08:47 PM brant We never had problems with stock tanks. I think so... Aug 16 2014, 07:33 AM Racer Chris When I road raced my car with a d-Jet 1.7L I ran a... Aug 16 2014, 09:57 AM tadink I've got exactly the same issue but ONLY on ha... Aug 16 2014, 10:45 AM d914 expensive but here is one to use almost out of the... Aug 16 2014, 02:06 PM tadink
expensive but here is one to use almost out of th... Aug 18 2014, 05:49 PM Racer Chris
where do you put it? Upstream or downstream fro... Aug 18 2014, 06:32 PM d914 low pressure from the gas tank.. high pressure to ... Aug 18 2014, 06:12 PM stugray I have seen the fuel slosh "chambers" th... Aug 18 2014, 06:31 PM tadink Thanks all for the input - but I don't think w... Aug 20 2014, 03:13 PM |
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