Help Alex figure out if a carb will fit =)

It's a great game to play, honest!

I'm trying to figure out if my carb'd LS will fit in there, or if I have to surrender to EFI.

Here's the basic stats.

RHS block - same dimensions as LS, except + 3/4''
Super victor intake - distance from valley cover to carb pad is 6.07''
quickfuel carb - distance from carb pad to flange around bowl is 3.5''

then I would run a low profile air intake plenum so I don't have to surrender to a drop dish and/or be unable to fit a large air cleaner on (e.g., 14x3 k&n with extreme top).

Distance from bottom of it (i.e., flange around carb) to the top is roughly 4''.

Like this

052307-07.jpg



So basically I'm looking at (from the valley cover to the top of the intake on the carb) 14.5''.

I'm looking at this image

rcr_coupe_11_fs.jpg


And I think it should fit. Even though the height is 14.5'', the important height is 10.5'' from the valley cover int he center. THe reason I say this is because I'm worried if the fuel bowl will bang into the spyder roofline.

I've already accepted the rear window won't fit if I go this way and am prepared to figure out how to have an air intake scoop similar to the Aussie cars in order to gain more clearance there, but I'm not willing to start chopping into the spyder clip roofline.

Rear window - useless
Spyder roofline - very important

lol

So I'm hoping somebody who has there car there, and a tape measure, can help me figure out if a carb is a go, or a no go with the above description.
 
Alex, I'm not trying to be a snob or anything, but a CARB? on such a high tech weapon as that? Come on!!! I have a lot of respect for carbs, and do prefer them in certain situations, but surely this car/engine needs something programmable. My 2c.
 
Alex,

you told me you had already decided to switch to the modern era....getting cold feet about electricity??

I like simplicity so I'm making a last ditch effort to see if it can work :D

You know me, holding out to the very last second to see if I can possibly get old school tech to work ....heck, I'm probably the only person (other than Howard) to swap my old power rack with a manual one :laugh:
 
Alex, just cut a huge hole in the back glass and put a velocity stack on it. That'd do the trick!

That's going down the :furious::furious::furious::furious: tuning path!

Stab a good old fashioned 1100cfm dominator on, tweak the fuel bowl levels, adjusting the primary and secondary jets and whamo, done. Stacks ... welllll, I don't think so, lol
 
I like simplicity so I'm making a last ditch effort to see if it can work :D

You know me, holding out to the very last second to see if I can possibly get old school tech to work ....heck, I'm probably the only person (other than Howard) to swap my old power rack with a manual one :laugh:

I believe you are getting simplicity confused with antiquity. Simplicity is jumping in and turning the key day in and day our reliably like injection provides. I do not miss the simplicity of points that burn out at night leaving me to set the gap with a match book or a carb that leaves my garage reeking of fuel all the time. Ask me if my 68 jag still has points or an updated electronic ignition. If I could figure out an acceptable injection system that looked like a set of webers I could mate to it instead of my Zenith Strombergs I would.
 
I like simplicity so I'm making a last ditch effort to see if it can work :D

You know me, holding out to the very last second to see if I can possibly get old school tech to work ....heck, I'm probably the only person (other than Howard) to swap my old power rack with a manual one :laugh:

Nah, plenty more of us ol school guys on the site, difference is we 'know' it works, you young pup's still need proof! Cut the hole's, nobody will get close enough to notice, even though its a chevy... Now I better get off this RCR forum before I say somethin Fran disagree's with..again... :evil:
 
If it pokes through the glass window area, that's fine, since I'm certain I won't be using the window.

If it pokes into the roof line of the spyder, big problem (for me anyways)

Hmmm.


All I have to do is look on the cobra forums and see how many people give up on their EFI (I know 3 locally who have) out of sheer trustration. or spend countless hours chasing around tfi modules and all sorts of electrical problems (bad components). Carb = simple. Tune it up and away you go.
 

marc

Lifetime Supporter
Come on Alex, Man Up. Besides, carbs don't work real well when turning real fast. BTW I was at the Dallas NHRA event, Scoggin Dickey showed a sheetmetal intake for ls3/ls7 you might want to look at. will fit a 102mm throttle body (they can prep for what size you want.) EFI = super car. Carb = gray beard hot rod.
 

Fran Hall RCR

GT40s Sponsor
Come on now Jac...
at your age can you actually remember driving anything ...never mind something as modern as a carb...Coal,Water, steam....propulsion...ahh..thats more like it...
 
Come on Alex, Man Up. Besides, carbs don't work real well when turning real fast. BTW I was at the Dallas NHRA event, Scoggin Dickey showed a sheetmetal intake for ls3/ls7 you might want to look at. will fit a 102mm throttle body (they can prep for what size you want.) EFI = super car. Carb = gray beard hot rod.

I may have to by force - my cam selection will depend on if I'm efi or carb supposedly (don't know why, but whatever), so if I can't figure out with 110% certanty that it will fit, well, I have to go with the known.

I just don't want to because of the added complexity - like I said, all I have to do is look at those trying to run EFI/EFI-like systems on their cobras and see the headaches most encounter. Although to balance that arguement out (I suppose), the LS-style engines were always meant to be fuel injected. 351w's were carb for the most part I believe?

If I went EFI I'd have HKE assemble the whole thing. 102mm ported throttle body, probably LSXR manifold, etc... etc... It's a 502 so it needs to breath ya know
 
Come on now Jac...
at your age can you actually remember driving anything ...never mind something as modern as a carb...Coal,Water, steam....propulsion...ahh..thats more like it...

Unfortunately yes... there was that night back in 72 that I knocked the race mirror off the drivers door of my Triumph 2000, couldnt work out where until daylight the next morning & found the mark on the powerpole....about 10 or 12 feet up:uneasy:...there are plenty of others, Im sure you would like to hear them all...but Im older & hopefully wiser now & it would cost you a large bottle of Rum along with several hours..
 
I believe you are getting simplicity confused with antiquity. Simplicity is jumping in and turning the key day in and day our reliably like injection provides. I do not miss the simplicity of points that burn out at night leaving me to set the gap with a match book or a carb that leaves my garage reeking of fuel all the time. Ask me if my 68 jag still has points or an updated electronic ignition. If I could figure out an acceptable injection system that looked like a set of webers I could mate to it instead of my Zenith Strombergs I would.

You can.

Speak to Mick Sollis over here in the UK, or Fran at RCR as he is developing exactly that.

Cheers,

Graham.
 
poor Alex still has no idea :(

I ~think~ it will fit. LS manifold is 6.5''. Carb manifold is 6.1. I'm tall deck so that's an extra 3/4''. So let's say it will be 7'', 0.5'' above the LS manifold. I ~looks~ like a carb (3.5'' tall) will fit there without fuel bowls smacking stuff, but I just ... dont .... know, and it's too expensive a proposition to guess on. Once again my concern isn't the rear window (I've pretty much given up on it), it's the roofline itself.
 
W0000t

carb1.jpg

carb3-1.jpg

carb2-1.jpg


Mr. Pokey will clear; I don't know if a drop dish + 14''k&n w/ exterme top will clear; that's next up.

That's with a gmpp single plane intake (Which Fran generously loaned me.. <3 Fran). So I coooould fit the proper intake - a Mast motorsports - one in, but it's 3'' taller. 3'' taller would equate to needing a rear scoop the size of a top fuel car's scoop?
 
Last edited:
Back
Top