Starfox07

GSL-SE 13b:


Ok so I've pretty much finished up everything for my Dellorto swap, but I'm a bit confused about how to set up my throttle/acclerator linkage. The picture from the racing beat instructions isn't very good, and the instructions are vague as well.



I don't understand how the cruise control could be coming from that direction.

Also, from this instruction:
From those instructions, it seem that the little barrel on the end of the factory throttle cable should work fine with the Dellorto's throttle linkage. Perhaps my particular carburetor was altered by a previous owner, but my throttle cable will in no way attach to the Del's throttle linkage.

This picture has been very helpful to me, except that I cannot see the throttle linkage!



Any pictures would be enormously appreciated

Sgt.Stinkfist

iTrader: (6)

heres mine form '06, i was daring and ran mine with open stacks...no filters

Starfox07

I can see how you did the bracket, but I still cannot see how the cable mounts to the throttle lever. Ideally, I would like a close-up photo of the part circled in blue here:

Sgt.Stinkfist

iTrader: (6)

obviously I had to make my own throttle cable and return spring mount, but luckily my carby had a traditional style throttle pull

Sgt.Stinkfist

iTrader: (6)

Starfox07

I'm kind of thinking about ordering one of these:

Dellorto and weber carburettors online



It's a totally ready-to-rock assembly, it has probably way better throttle feel than anything I could build, and it looks damn cool. About $100 though...

The only issue is that because it's engineered in Britain (I believe) the throttle cables are coming from the wrong direction. Would it be ok to turn them 180* and route them to my pedal box without issues?

DarrenTRS

iTrader: (1)

Sorry about the quality, it's from 2008 and about the only picture i have close up of the carb on the car, this is the same linkage as described in the racing beat picture but there is one "problem" I find with it.

As you progress through throttle it becomes harder and harder to open as it goes from pulling the arm at an angle to almost dead on so getting it to "Wide Open Throttle" requires quite a bit of force and as far as I can remember even with it fully adjusted and good tension, with full depression of the pedal there was still room for the throttle to open a little more.

If you need I'll be more than happy to take some better pictures (just gotta find the stuff and toss it together) and possibly a quick video explaining what I mean come sunrise.

t_g_farrell

iTrader: (1)

Not sure what size that is but your going to need to do some mods to make it work
well with a rotary. Thats why RB was in the business of modding Dells and selling
them, it wasn't a bolt on for the most part. Not saying you can't tune it but you'll
want to look at the things RB did before you get it to give you an idea. Check out
Gruntled.com - Dellorto Intake System for lots of details.

Starfox07

I'm pretty sure I have an RB modded Del. It's jetted to the RB specs exactly. The only thing different is the throttle linkage lever. And in that picture, I was referring to the throttle linkage system only, not the carb.

t_g_farrell

iTrader: (1)

My bad, didn't click thru the link. Carry on

Starfox07

So I was messing around with my factory throttle sheath bracket holder thing (dunno what the real name for it is) and managed to get to a position that was pretty much a straight shot to the throttle lever, and one of the holes lined up precisely with one of the air horn bolts.



I started thinking that I could possibly fabricate a small spacer to go in between the air horn bolt and the air horn flange to locate the bracket securely. Something like this:



With the spacer shown in red. While it looks long, I can advance the sheath bracket another 1/2" or so until it runs out of thread, and at that point the spacer would only be something like 1/4", which is not much of a bending moment. What do you guys think?

t_g_farrell

iTrader: (1)

Seems a little weak to me. That plate and the spacer will tend to move and bend a lot. If it
does it enough it will weaken the plate or the bolt and then snap, no throttle linkage.

Notice how the RB one is much thicker and anchored at 2 places. You want to do something
like that. I like Stinkfist solution better but I'd use thicker plate. His anchoring and bends make it
a fairly strong mount.

j_tso

iTrader: (2)

As long as the turns aren't too sharp, you can route a throttle cable any direction. An FC turbo cable might be long enough, its throttle opens the same direction as the side drafts.

I have the Webcon linkage kit for my DCOE, it's quite pricey, but the throttle feel is great. There's no shade tree rigging a return spring or throttle bracket, it just bolts on and works.

Rotaryhaven

iTrader: (17)

your dell is for a 12a, notice that you don't have the double cable bracket holes (accelerator and cruise control). You also don't have the air filter on and since the bolt is not in, technically you only have one bolt holding it. An easy solution right now is to get an accelerator cable from a 12a car and put a 10mm bolt and nut to stabilize (further sturdy) the bracket.......

Starfox07

The carb was previously mounted on a 4 port 13b which is probably why the linkage is different, but it is jetted for a 13b.

Siraniko

iTrader: (13)

old pix wherein I replaced the orig bellcrank so it will WOT much quicker. this is the RB dellorto for a 12-A.

Siraniko

iTrader: (13)

couldnt resist so these are fresh pix in my SA with weber 48 DCO. the throttle cable bracket is made of 1/4" mild steel from home depot racing, mig welded and bolted down on the top engine inspection plate. No flexing since I added a brace on that ran from the horizontal bar to vertical bar. not the best looking one but it works very well lol

Starfox07

Thanks Siraniko. I might end up doing something similar.

Jhereg

iTrader: (27)

Saw this post on RotaryNews facebook page, loving the throttle cable bracket/lifting hook.

Starfox07

My finished setup:

roondawg

iTrader: (1)

What pressure regulator set-up is that? I'm doing a weber side draft and was interested in this thread.

thx

turbo_dave

iTrader: (50)

Lol to
Home Depot racing

Starfox07

I used the Mallory 4309 bypass regulator with the stock efi pump. If you have an SE fuel system, it seems to work pretty well. When I first got things put together I was having weird spiking fuel pressure issues, but I think it was a bad battery, and not the regulator.

roondawg

iTrader: (1)

I'm doing streetport 12a. Just ordered 4309 too. Did you use return?

Starfox07

Yep. I used the stock SE return line. Works fine. I've heard that the 12a return line is not large enough for larger pumps, so you may not be able to use it.