Go Back   LS1TECH > SBC-BBC-LT1-LT4 PERFORMANCE > Small Block & Big Block Chevy Specific
Sign in using an external account
Register Forgot Password?
Search

Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 05-20-2011, 11:42 AM   #1
Teching In
Garage is empty, add now
 
Trader Rating: 1
Join Date: Nov 2006
Posts: 42
Default Converting LT1 to carb & distributor?

Has anyone converted their LT1 motor to a Carb & 4bbl Intake? I want to eliminate all computuer controlled wiring harnesses.

Also, has anyone removed the optispark and just installed a normal sbc distributior into their LT1 motor?

Looking at 93-97s (firebirds/camaros) and I'm not familiar with all of the computer controlled stuff.
mm8ls1 is offline   Reply With Quote
Old 05-20-2011, 04:12 PM   #2
TECH Veteran
Garage is empty, add now
 
LS69TA's Avatar
 
Trader Rating: 30
Join Date: Jan 2003
Location: Texarkana, Tx
Posts: 4,405
Default

My buddy has a 280Z and put a LT1 intake on his Gen1 350 and installed a distributor. He left the efi on it though.

Click the image to open in full size.
__________________
"A SS looks like it could kick your *** if it wanted to, but a WS6 looks like it's coming over to do it!"
'13 Mustang GT Deep Impact Blue, A6, 1-chambers, sound tube delete
'05 Ram 1500 QCSB 4x4 yellow, 22" SRT10s, 2" shackles, 2.5" TDs,1-chambers, Superchips
SOLD '69 T/A clone project,LS1/6spd,FM-15, 4th Gen T/A interior, Hotchkis, 335's...etc.
LS69TA is offline   Reply With Quote
Old 05-20-2011, 07:17 PM   #3
10 Second Club
Garage is empty, add now
 
Trader Rating: 0
Join Date: Jan 2007
Location: South Carolina
Posts: 67
Default

I am in the process of doing it right now. Mainly for the ability to rev above 7000 and equal n2o distributation. I am still early in the conversion and it has turned out to be quite a project. I am still looking for someone to convert a Vic. single plane to LT for me. Anyway good luck!
KENS96M6 is offline   Reply With Quote
Old 05-20-2011, 10:32 PM   #4
On The Tree
1995 Pontiac Trans Am
 
grunt1152's Avatar
 
Trader Rating: 0
Join Date: Mar 2011
Location: Prestonsburg, KY
Posts: 101
Default

I may be completely wrong, but all you would need to make a vic jr fit is to seal the water neck and cooling runners and have it drilled for lt1 style heads? Somebody correct me if Im wrong. But I am good with a shop who drills older style intakes to fit vortec style heads, so Im sure it couldnt be much different?
__________________
grunt1152 is offline   Reply With Quote
Old 05-21-2011, 12:12 AM   #5
10 Second Club
Garage is empty, add now
 
Trader Rating: 0
Join Date: Jan 2007
Location: South Carolina
Posts: 67
Default

Thanks, Grunt. I am sure I am making more out of the conversion than necessary. The local shop said they could probably do it, they just have never done one before. I just like experience.
KENS96M6 is offline   Reply With Quote
Old 09-24-2011, 12:14 PM   #6
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2009
Posts: 22
Default

Quote:
Originally Posted by LS69TA View Post
My buddy has a 280Z and put a LT1 intake on his Gen1 350 and installed a distributor. He left the efi on it though.

Click the image to open in full size.

any up close pics of the distributor install? How did he do it? weld a boss in there or just drill and machine a hole?
6erWebb is offline   Reply With Quote
Old 09-24-2011, 12:47 PM   #7
TECH Veteran
Garage is empty, add now
 
LS69TA's Avatar
 
Trader Rating: 30
Join Date: Jan 2003
Location: Texarkana, Tx
Posts: 4,405
Default

I'll see if I can find some more pics. I believe he drilled a hole and welded a boss for the hold down clamp.
__________________
"A SS looks like it could kick your *** if it wanted to, but a WS6 looks like it's coming over to do it!"
'13 Mustang GT Deep Impact Blue, A6, 1-chambers, sound tube delete
'05 Ram 1500 QCSB 4x4 yellow, 22" SRT10s, 2" shackles, 2.5" TDs,1-chambers, Superchips
SOLD '69 T/A clone project,LS1/6spd,FM-15, 4th Gen T/A interior, Hotchkis, 335's...etc.
LS69TA is offline   Reply With Quote
Old 09-25-2011, 09:55 AM   #8
Staging Lane
Garage is empty, add now
 
Novaman's Avatar
 
Trader Rating: 0
Join Date: Mar 2010
Location: sullivan, mo
Posts: 89
Default

http://www.summitracing.com/parts/NAL-24502592/
pricey but here you go. I'd stay with efi if possible.
__________________
finally a ls owner
Novaman is offline   Reply With Quote
Old 09-25-2011, 03:41 PM   #9
TECH Fanatic
Garage is empty, add now
 
Trader Rating: 10
Join Date: Oct 2005
Location: Chitown, IL
Posts: 1,393
Default

search the lt1 section on here, there is a guy that did a complete writeup on going carb.
merim123 is offline   Reply With Quote
Old 09-26-2011, 10:15 AM   #10
TECH Apprentice
Garage is empty, add now
 
Trader Rating: 0
Join Date: May 2009
Location: NW AR
Posts: 320
Default

Well for those who want to convert a single plane SBC manifold over, you have 3-4 major problems that you have to overcome. First the bolt angles are different the SBC bolts are perpendicular to the mating surface. The LT1 bolt holes go straight down. Also the spacing is different. Another problem is that the valve cover sealing surface for LT1 come up away from the flat surface that the intake manifold seals against. So the outer edges of the SBC intake manifold are fatter and hit this.



This first picture shows the LT1 head and an LT1 EFI intake in place, notice the lip on the head just outside of the manifold. If you look at the other pictures that show all the manifolds together you can see the extra material on the SBC manifold that interferes.




From left to right LT1 Carb, LT1 EFI (1995 Vette), SBC Carb



Look at the difference in material around the bolt holes.



The rear of the manifolds where the distributor goes.



The bottom of the SBC Carb intake, you can see how the bolt holes are perpendicular to the mating surface.



LT1 Stock EFI manifold, you can see how the bolt holes are more vertical than the SBC.

Conclusion, buy the GM Carb intake. Unless you spend a whole lot of time north of 6,000rpm, then pay someone to mod a Victor or make a sheet metal for you. I made 580 fwhp with the GM Carb intake on a mild cam hydraulic roller 396
noice is offline   Reply With Quote
Old 09-26-2011, 11:39 AM   #11
On The Tree
Garage is empty, add now
 
Trader Rating: 0
Join Date: Mar 2010
Location: SpringCity Tn
Posts: 153
Default

If you go with that summit intake. What is required for timing? A distributor? And what's required for that conversion? I got a lt1 buddy fed up with his efi system. We would like to convert.
sleeper101 is offline   Reply With Quote
Old 09-26-2011, 11:58 AM   #12
TECH Apprentice
Garage is empty, add now
 
Trader Rating: 0
Join Date: May 2009
Location: NW AR
Posts: 320
Default

Quote:
Originally Posted by sleeper101 View Post
If you go with that summit intake. What is required for timing? A distributor? And what's required for that conversion? I got a lt1 buddy fed up with his efi system. We would like to convert.
A standard SBC distributor will work to run the engine, however the next set of problems comes from the lack of room where the distributor goes below the windshield. Also you need to establish a timing mark on the balancer so that you can dial in the distributor.
noice is offline   Reply With Quote
Old 09-26-2011, 12:39 PM   #13
TECH Fanatic
Garage is empty, add now
 
Trader Rating: 10
Join Date: Oct 2005
Location: Chitown, IL
Posts: 1,393
Default

here's the thread with the parts list I mentioned above. A few guys have followed this with success.

The Full Carb Swap Parts List And What It Takes
merim123 is offline   Reply With Quote
Old 09-26-2011, 12:45 PM   #14
On The Tree
Garage is empty, add now
 
Trader Rating: 0
Join Date: Mar 2010
Location: SpringCity Tn
Posts: 153
Default

Ahh a little fabbing of the fire wall is no issue to me lol. Sounds like a pretty simple swap to me. So a standard sbc distributor, summits intake, a little firewall modification, and some timing marks. is that all "required" other things you can do is that opti block off plate I seen on ebay for 80$ and were up and running. Then we can get rid of all that mess of wiring etc! He will be tickled. Lol
sleeper101 is offline   Reply With Quote
Old 09-26-2011, 01:12 PM   #15
On The Tree
Garage is empty, add now
 
Trader Rating: 0
Join Date: Mar 2010
Location: SpringCity Tn
Posts: 153
Default

^^ thanks for the link. Some good info. I will pass the information along.
sleeper101 is offline   Reply With Quote
Old 09-26-2011, 01:37 PM   #16
TECH Apprentice
Garage is empty, add now
 
Trader Rating: 0
Join Date: May 2009
Location: NW AR
Posts: 320
Default

Quote:
Originally Posted by sleeper101 View Post
Ahh a little fabbing of the fire wall is no issue to me lol. Sounds like a pretty simple swap to me. So a standard sbc distributor, summits intake, a little firewall modification, and some timing marks. is that all "required" other things you can do is that opti block off plate I seen on ebay for 80$ and were up and running. Then we can get rid of all that mess of wiring etc! He will be tickled. Lol
Yea I forgot to mention, gotta block off the opti drive hole. Not a bad time to go with an electric water pump too.
noice is offline   Reply With Quote
Old 09-26-2011, 01:37 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
1995, 2000, 327, 350, carb, carburator, chevy, convert, converting, convertion, distributor, gen, intake, lt1, sbc


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 01:22 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details