carb swap thread
Thread Starter
On The Tree
Joined: Feb 2007
Posts: 118
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From: greenwood ms
carb swap thread im starting this because im swapping to a carb on my 93 z28 and am wondering what works im goin with a gen 1 intake so there will be modifing but everyone goes with a rear mounted distribitor is this something that i have to do or can the opti work with it some how
Launching!
Joined: Mar 2004
Posts: 299
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From: Elwood, IL
Depending on what you are looking to do I went with a Vic Jr. intake and a crank trigger dist. I also ran a crank trigger. I cut the cowl back to the firewall. Actually about an inch away from the firewall. I could pull the dist out of the car without any problem. The normal dist also makes routing plug wires a little easier.
To answer your question I am not sure how to make the opti still work.
Ken
To answer your question I am not sure how to make the opti still work.
Ken
Launching!
Joined: Dec 2004
Posts: 284
Likes: 1
From: Hebron, Oh
If you were really wanting to keep the opti, why not run it off of the factory computer. You would need to keep the map sensor, but I don't see why it wouldn't work. If you have a way to tune it, you would still have full control over your ignition map.
i dont see why you would want to run an opti with a carb..just use a hei distributer or a msd 6al box setup..plus when doing this you can ditch the ecu **** and all the other b.s wires.
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^wrong a dual plane lt1 carb intake makes better mid to upper power then our stock efi intakes.stock efi intakes will make better low end.tom cowle who has the bolt on record right now did a carb setup and stock setup and told me what i just said after hours on end of dynoing
I'm scratching my head here. You're wanting to go with something that could potentially elemenate one the weakest links on the LT1 (opti) and you want to keep it? Man, I'm with the other guys, yank the opti, go HEI. Do me a favor though, from someone that has fought numerous opti issues, when you take it off, don't just throw it in the trash.... douse it in lighter fluid, light it on fire. Once the fire goes out, either you, or someone else, I don't care, but drive a bulldozer or steam roller over it. After that, tie it to your back bumper and drag it around a while, and then, and only then, throw it in the trash.
Launching!
Joined: Mar 2004
Posts: 299
Likes: 0
From: Elwood, IL
^wrong a dual plane lt1 carb intake makes better mid to upper power then our stock efi intakes.stock efi intakes will make better low end.tom cowle who has the bolt on record right now did a carb setup and stock setup and told me what i just said after hours on end of dynoing
Ken
Thread Starter
On The Tree
Joined: Feb 2007
Posts: 118
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From: greenwood ms
awesome i was told they like the dual plane but if i go with an hei what do i need to do with the computer just send my chip back to pcmforless and have them retune it or what and also ive been told of some type of angled spacer to run a gen 1 intake the only reason i ask is cause i have on and its a 93 car with a 700r4 so i dont think linkage will be a issue
Last edited by suicidal racing; Apr 10, 2010 at 01:11 PM.
TECH Resident
Joined: Jul 2009
Posts: 772
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From: Bahrain
suicidal racing, thanks so much bro for the detailed information. You helped answer lots of questions and I managed to chose parts for my conversion finally.
I do have some questions though (sorry if it seems like I am highjacking the thread)
For my fuel return line, how big does it need to be?
This is a list of my parts :-
http://www.summitracing.com/parts/AEI-13301/ fuel pressure regulator
(I intend to keep my stock fuel pump)
http://www.summitracing.com/parts/AEI-15632/ a gauge to monitor pressure
http://www.summitracing.com/parts/AER-FCP0102/ fuel lines to feed the carb
http://www.summitracing.com/parts/HLY-0-80508S/ 750cfm carb (is this too much for a cc503 with slightly ported heads and full bolt-ons?)
http://www.summitracing.com/parts/HLY-20-45/ kick down bracket
http://www.summitracing.com/parts/MSD-3565/ wires
http://www.summitracing.com/parts/MSD-8203/ blaster 2 coil with balast resistor
http://www.summitracing.com/parts/MSD-8360/ ready to run distributor, magnetic pick up, vacuum advance
http://www.summitracing.com/parts/NAL-12367600/ timing cover block plate
http://www.summitracing.com/parts/NAL-24502592/ intake manifold
http://www.summitracing.com/parts/PFS-80030/ damper with timing marks
Also, will I need a hold down clamp? If I am missing anything, let me know please.
I do have some questions though (sorry if it seems like I am highjacking the thread)
For my fuel return line, how big does it need to be?
This is a list of my parts :-
http://www.summitracing.com/parts/AEI-13301/ fuel pressure regulator
(I intend to keep my stock fuel pump)
http://www.summitracing.com/parts/AEI-15632/ a gauge to monitor pressure
http://www.summitracing.com/parts/AER-FCP0102/ fuel lines to feed the carb
http://www.summitracing.com/parts/HLY-0-80508S/ 750cfm carb (is this too much for a cc503 with slightly ported heads and full bolt-ons?)
http://www.summitracing.com/parts/HLY-20-45/ kick down bracket
http://www.summitracing.com/parts/MSD-3565/ wires
http://www.summitracing.com/parts/MSD-8203/ blaster 2 coil with balast resistor
http://www.summitracing.com/parts/MSD-8360/ ready to run distributor, magnetic pick up, vacuum advance
http://www.summitracing.com/parts/NAL-12367600/ timing cover block plate
http://www.summitracing.com/parts/NAL-24502592/ intake manifold
http://www.summitracing.com/parts/PFS-80030/ damper with timing marks
Also, will I need a hold down clamp? If I am missing anything, let me know please.
you will need a distributer hold down clamp yes..
as for your return line seeing you going to run your stock pump your feed line will be a-6 probley and i would run a -8 for a return seeing you pump is designed for high pressure..
if you want eletronic choke then get that carb if not then grab this one..these will be enough..look around on boards you belong to also because you can get a used 750cfm double pumper 4150 for 100-200$ and then a rebuild kit is only 50$
http://www.summitracing.com/parts/HLY-0-3310C/
oh yeah you will also need carb linkage and a plate/holder
http://www.summitracing.com/parts/HLY-20-88/
as for your return line seeing you going to run your stock pump your feed line will be a-6 probley and i would run a -8 for a return seeing you pump is designed for high pressure..
if you want eletronic choke then get that carb if not then grab this one..these will be enough..look around on boards you belong to also because you can get a used 750cfm double pumper 4150 for 100-200$ and then a rebuild kit is only 50$
http://www.summitracing.com/parts/HLY-0-3310C/
oh yeah you will also need carb linkage and a plate/holder
http://www.summitracing.com/parts/HLY-20-88/
Last edited by suicidal racing; Apr 10, 2010 at 11:23 AM.
TECH Resident
Joined: Jul 2009
Posts: 772
Likes: 0
From: Bahrain
Will i need any cable installation kits with levers, springs and retainers?
I will be installing an adapter to tap off the end of the dual feed line and read pressure there. That is why I chose the Aeromotive instead of the Summit which is just a 90 degree bend.
I will be installing an adapter to tap off the end of the dual feed line and read pressure there. That is why I chose the Aeromotive instead of the Summit which is just a 90 degree bend.
Last edited by ADM; Apr 10, 2010 at 12:02 PM.