| [GMCnet] Re: TBI Questions & Google Groups [message #369304 is a reply to message #369302] |
Tue, 29 March 2022 08:31   |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma:
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Senior Member |
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I use a surge tank, I think it's worth it, but I'm an over engineering kinda guy.
I have 3 fuel pumps, 2 lift pumps that feed the surge tank and then the TBI pump that pulls from the surge tank. The return from the TBI goes to the surge tank
Here's a picture
http://www.gmcmhphotos.com/photos/data/7303/medium/PumpV2.jpg
Keith Vasilakes
Mounds View MN
76 exRoyale
MicroLevel
[http://www.gmcmhphotos.com/photos/data/7303/medium/PumpV2.jpg]
________________________________
From: Bruce Hislop
Sent: Tuesday, March 29, 2022 5:06 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: TBI Questions & Google Groups
For the Wide-Band O2 sensor, you can't just hook it directly to the EBL equipped 7747 ECM. It needs to be connected to an interface box which takes
the WB O2 signal and outputs a linear 0-5 volt signal to the ECM.
http://dynamicefi.com/TT-1.php
I use Dynamic EFI's TT-1 Wide-Band kit. I use it for displaying the actual Air Fuel Ratio (AFR) on the What's Up Display. I use a separate Narrow
Band O2 sensor for the actual closed loop operation.
I have a Rochester TB and noticed when I first installed it the fuel pressure on on the low side, about 11.5PSI if I recall. I was able to turn the
adjusting screw (not easy) and got it up to near 13PSI. It has slowly dropped over the years to about 12PSI now, so I'm going to look into a
replacement regulator spring as pointed out by Randy.
I also do not use a surge tank. Once the fuel level gets to the 1/2 mark, I start looking for a gas station to refill. By that time I've drive
200-250 miles, about 4 hours and I need a break too.
--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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