The Stovebolt.com Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Big Thanks!

Big THANKS to

MONGO
for hosting
the weekend event.



Read all about it.


Stovebolt Site Search
'
Oh Lord, I just gotta find it....

A pdf guide to help you search the Site


Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
11 members (Justhorsenround, Lightholder's Dad, 66flea, 3100Cummins, carbking, 1 invisible), 85 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums60
Topics125,462
Posts1,013,055
Members45,239
Most Online1,229
Jan 21st, 2020
Image Posting Policy
Previous Thread
Next Thread
Print Thread
lt1 converted to a carb
#1430328 Tue Nov 16 2021 03:35 AM
Joined: Sep 2019
Posts: 221
R
'Bolter
Anyone familiar with a '95 lt1 out of a buick? I've finally decided to convert my lt1 in my '50 3100 to a carburetor. I purchased the GMPP intake to make this happen. I'm looking for confirmation as to how the water pump hoses should/could now be routed. Can any lines be blocked off?

Re: lt1 converted to a carb
Rocket man #1430338 Tue Nov 16 2021 06:15 AM
Joined: Jan 2019
Posts: 144
F
'Bolter
Out of curiousity, why do you want to convert it?


58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.

59 Apache, long bed fleetside, half of an L6, 3 on the tree
Bought by my dad out of a field for $100 to build with my brother. He never touched it, so now it is mine if I can figure out how to get it down from Alaska.
Re: lt1 converted to a carb
Rocket man #1430361 Tue Nov 16 2021 04:23 PM
Joined: Sep 2019
Posts: 221
R
'Bolter
No knowledge with electronics, no instruments to set up a EFI engine.

Re: lt1 converted to a carb
Rocket man #1430395 Tue Nov 16 2021 08:46 PM
Joined: Jan 2019
Posts: 144
F
'Bolter
Fair enough.

The LT1 water pump has these hookups:

Thermostat housing on the top, that goes to the upper port on the radiator.

Lower radiator port to the other large hose (near the top, pointing toward the front/driver side)

The smaller hose nipple that comes out the upper side and turns up went to the throttle body and can be capped off.

The other two smaller hose nipples go to the heater core, orientation is not critical. Ideally you want the outlet from the water pump to go to the top of the heater core, but either way will work and techline doesn't specify a flow direction there.


58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.

59 Apache, long bed fleetside, half of an L6, 3 on the tree
Bought by my dad out of a field for $100 to build with my brother. He never touched it, so now it is mine if I can figure out how to get it down from Alaska.
Re: lt1 converted to a carb
Rocket man #1430396 Tue Nov 16 2021 08:48 PM
Joined: Jan 2019
Posts: 144
F
'Bolter
Alternatively, it looks like Summt sells a replacement pump (555-51091) that puts both heater core ports on the passenger side. It is a couple hundred bucks, but saves you having to block the throttle body port and makes your heater routing cleaner.


58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.

59 Apache, long bed fleetside, half of an L6, 3 on the tree
Bought by my dad out of a field for $100 to build with my brother. He never touched it, so now it is mine if I can figure out how to get it down from Alaska.
Re: lt1 converted to a carb
Rocket man #1431074 Tue Nov 23 2021 04:39 PM
Joined: Jan 2019
Posts: 144
F
'Bolter
The first attachment is picture of a stock pump.

The orange port is where your thermostat/housing goes, and it should be connected to your upper radiator hose (hot water into the radiator).

The red port goes to your lower radiator hose (cooled water back into the engine.

The two green ports go to you heater core.

The purple port went to the stock throttle body (and returned through the heads) to keep the butterfly from icing up. You can cap that one off.

The second image is from the aftermarket one you mentioned. The color coding is the same, but it does not have the throttle body feed.
Jeds pump [jegs.com]

You will notice that the aftermarket one uses the locstion of the throttle body feed for the heater. You could do the same since it is just another source of hot water, but in the stock configurstion, the throttle body nipple is smaller than the heater core one, so you would have lower flow and need an adapter hose.

Attached Files
Screenshot_20211123-092711__01__01.jpg (100.79 KB, 35 downloads)
Screenshot_20211123-093401__01.jpg (52.81 KB, 35 downloads)

58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.

59 Apache, long bed fleetside, half of an L6, 3 on the tree
Bought by my dad out of a field for $100 to build with my brother. He never touched it, so now it is mine if I can figure out how to get it down from Alaska.

Moderated by  KCMongo 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.4