 L-jet 4 bolt intake question, what is this from? |
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| yarin |
 Jan 18 2006, 12:25 PM
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#1
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'14-X'in FOOL  Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States  |
This is a "'73 1.7L L-jet setup" i'm considering buying. I see a 4 bolt pattern, however my carbed 2.0 has a 3 bolt pattern. Can these injection runners be drilled to fit my heads?
Thanks Attached image(s) 
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| yarin |
Jan 18 2006, 12:26 PM
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#2
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
my present setup
were these weber bases drilled for a 3 bolt intake or did they come with a total of 5 holes? Attached image(s) 
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| ClayPerrine |
Jan 18 2006, 12:28 PM
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#3
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Life's been good to me so far..... Group: Admin Posts: 15,441 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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The manifolds under the carbs came with both sets of holes.
As for the fuel injection, that is not a L-jet system, it's a d-jet system. It looks like a 1.7, which will be a bit small for a 2.0. You should get a 2.0 system for best stock performance. |
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| r_towle |
Jan 18 2006, 12:29 PM
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#4
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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1.7 liter only had d-jet.
it looks like it could be d-jet, but I cant see all the parts from that pic. If its ljet, just drill out the manifold for the three bolt head pattern, it will be fine. Rich |
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| rhodyguy |
Jan 18 2006, 12:31 PM
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#5
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,073 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
yep. one size fits all on that design for the carb intakes. i wonder what the little electrical connection on the runner is for? (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
k |
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| yarin |
Jan 18 2006, 12:39 PM
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#6
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
Yes you guys are correct. It is a D-jet system, my mistake. I'm building a megasquirt system and want to use some stock components for now just to get things going. So will this stock D-jet 1.7 setup bolt to my 2.0 heads assuming i drill an extra hole in the middle? I will be using the following stock components: runners, injectors, fuel rail, intake plenum, fuel pump, fuel pressure regulator I've read that stock 1.7 injectors work much better than 2.0 injectors due to minimum pulse width limitations on the 2.0s. 1.7 injectors certainly flow enough for a slightly modified 2.0. Thanks! |
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| r_towle |
Jan 18 2006, 12:44 PM
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#7
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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yes it will work.
I would however question the size of the plenum and intake runners for a 2.0 liter... Rich |
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| yarin |
Jan 18 2006, 12:48 PM
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#8
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
Is there a big difference between the 1.7 and 2.0 runner diameter and plenum volume?
I'll be using some stock throttle body and K&N filter. I had planned on building a complete intake/injection/fuel system from scratch but I won't be able to start on that till summer. There was a link someone posted of a modified intake plenum they used, i can't find the link now. He cut off the end and bolted another throttle body to it. The pics had a tail light lens in them, and a bunch of parts on a table. i searched and searched, anyone have the link? |
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| lapuwali |
Jan 18 2006, 12:49 PM
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#9
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
The main difference for your purposes is the size of the plenum and runners. The 1.7 injectors are, indeed, a better choice for aftermarket PEFI, but the 2.0 runners are a bit bigger, and the plenum is MUCH bigger, than the same parts on the 1.7. The car would run, but you'd lose top-end power. 2.0 D-Jet setups are out there, keep looking. You can often buy the 1.7 injectors by themselves on Ebay.
Fuel pump, fuel pressure regulator, runners, plenum, throttle body, air cleaner, and injectors are the minimum of what you need to do your own EFI setup. You can get injector connectors and plumbing from several sources. btw, the 1.7 injectors flow enough for a heavily modified 2.0, not just a slightly modified one. They'll support 160hp or so. |
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| r_towle |
Jan 18 2006, 12:49 PM
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#10
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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which parts do you need.
I probably have the runners and plenum from a 2.0 liter djet. You wont need the brain or MPS... Injectors, I wont have any good ones... Throttle bodies that I have need lots of work, but could be salvaged... Rich |
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| yarin |
Jan 18 2006, 01:16 PM
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#11
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
OK. Sounds like 1.7 injectors and 2.0 plenum and runners are the way to go for now. So i'm looking for 1.7 injectors and 2.0 plenum and runners, fuel pump, fuel rail, pressure regulator. I don't want to use a stock throttle body, i'll find something from volvo or elsewhere. The rest of the parts i can find GM OEM like the TPS, Fidle solenoid or GM IAC, air temp sensor, then Wideband. |
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| r_towle |
Jan 18 2006, 01:43 PM
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#12
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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I have all of that except the injectors..
I have the runners, plenum, fuel rail, etc. Get a new fuel pump, mine are old and old. Rich |
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