In-tank fuel pumps output? - LotusTalk - The Lotus Cars Community
 
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post #1 of 13 (permalink) Old 06-19-2018, 11:54 AM Thread Starter
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Question In-tank fuel pumps output?

Does anybody know how much SE/ S4 OEM pumps flow?
How much more does the S4s/ S300 "red top" pump flow?
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post #2 of 13 (permalink) Old 06-19-2018, 12:16 PM
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I know this doesn't answer your question, but I just installed the Bosch 69218 last weekend and it reads a constant 43 psi while idling.

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post #3 of 13 (permalink) Old 06-19-2018, 03:10 PM
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The pumps listed for the Corvette ZR1 state 40Gal/hr (151Lph)

The 89 Corvette pumps are saying around 22Gal/hr...
The BOSCH 69218 doesn't specify. but it is for the GM V8's..
Some people have listed the BOSCH 69223 as a cross, but it is only used on the 6cy GM cars...

I had a lean burn issue with an older X180-R pump... so I replaced it with the BOSCH 69218 (without doing anything else) and in 1 hour (same hot day) my lean burn went away, I could run full boost again. Verified with a Air:Fuel meter.

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post #4 of 13 (permalink) Old 06-21-2018, 06:56 PM Thread Starter
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Quote:
Originally Posted by Vulcan Grey View Post
The pumps listed for the Corvette ZR1 state 40Gal/hr (151Lph)

The 89 Corvette pumps are saying around 22Gal/hr...
The BOSCH 69218 doesn't specify. but it is for the GM V8's..
Some people have listed the BOSCH 69223 as a cross, but it is only used on the 6cy GM cars...

I had a lean burn issue with an older X180-R pump... so I replaced it with the BOSCH 69218 (without doing anything else) and in 1 hour (same hot day) my lean burn went away, I could run full boost again. Verified with a Air:Fuel meter.
Great information Travis, thank you.

Is this the right strainer for 69218?
https://shop.advanceautoparts.com/p/...018/20770313-P

Or, should I look for 68001 ?
.
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post #5 of 13 (permalink) Old 06-21-2018, 08:18 PM
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Here is what mine looked like when I installed mine last weekend. I ended up using the same screen filter. I had to pull the silver cap off the old fuel pump and transfer it to the new pump in order to get the filter to snap onto the new pump.
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post #6 of 13 (permalink) Old 06-21-2018, 08:22 PM
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Picture with metal snap ring that had to be transferred over to the new pump. The secret to getting the old strainer off is to squeeze the two plastic tabs that are hidden inside of the strainer (which is attached to this silver thing in the pic below).
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Last edited by Seraph; 06-21-2018 at 08:34 PM.
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post #7 of 13 (permalink) Old 06-23-2018, 08:38 AM Thread Starter
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Got the pump today, but it looks like a "compact" version.
Midget pump?

I'm wondering if they sent me a wrong model.
Here is a comparison to Blox and OE "Red Top" pumps.
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post #8 of 13 (permalink) Old 06-23-2018, 05:11 PM
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Apparently you have to remove the pulse damper and replace it with a short section of hose that comes in the kit. Otherwise you get an engine lean issue that causes hesitation and maybe a backfire under heavy acceleration.

I can verify that the 68018 does not work. It does not have a way of snapping onto the Bosch 69218 fuel pump. I'll be taking that part back.

Supposedly a TS9 or FS9 fuel strainer would work.
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Last edited by Seraph; 06-23-2018 at 05:24 PM. Reason: image didn't attach correctly
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post #9 of 13 (permalink) Old 06-23-2018, 08:24 PM
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Post #8 is WRONG

I finally figured out that if I remove this white plastic ring on the fuel pump (shown in RED below), that Bosch part #68018 fuel strainer will fit on a Bosch #69218 fuel pump. The Bosch 68018 fuel strainer is square or trapezoid shaped (mine was a trapezoid). The challenge with this square filter is that it doesn't easily slide into the tank. There is a fuel tank baffle in the way so the fuel pump and strainer has to sort of bend at the proper angle to slide down in there (I couldn't verify on mine if the strainer might have fallen of because it was just too hard to see with my head in that hole). I would recommend finding a proper round strainer.

Here is an infographic and pics to help show what is involved.
*BE SURE TO REMOVE THE PULSATOR (HIGHLIGHTED IN YELLOW BELOW) OR ELSE YOU WILL GET AN ENGINE LEAN MIXTURE WITH BACKFIRING AND HESITATION DURING FULL THROTTLE!!! (Don't ask)

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post #10 of 13 (permalink) Old 06-26-2018, 09:11 AM Thread Starter
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Alternate part:

Per my calculations, BOSCH 9438756 (69693) pump, which is used on 97' Volvo 850GTL,(2.4 L, T-5) should have enough output to supply a 910 4 Ccyl turbo engine consuming 450 CFM of air at 1 Bar

Last edited by MRDANGERUS; 06-26-2018 at 09:22 AM.
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post #11 of 13 (permalink) Old 06-26-2018, 09:24 AM
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The problem with the BOSCH 9438756 from the volvo is that it doesn't include the fuel submersible rated hose to replace the pulsation damper, and it doesn't have the correct wire harness.

The BOSCH 69218 is plug and play, and includes everything except the need to get the TS-9 strainer.


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post #12 of 13 (permalink) Old 03-01-2019, 06:53 PM Thread Starter
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post #13 of 13 (permalink) Old 03-02-2019, 03:51 AM
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Esprit 255lph Fuel Pump - ATS Racing

I noticed the other day Aaron has a kit with a a modern pump. fairly reasonable price - I plan to try it if I start having trouble.

94 Esprit S4 - Silver
Previous - lots of hot rod Air Cooled 911s
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