Thread: Impartial Advice required - carb issues

Stu

I converted my '85 RRc from carbs to EFI and haven't looked back.

The mixer system for the LPG is easier, but you need the complete system including ECU for the conversion. You will also find that you need to replace the fuel tank with a full flow submerged pump type. You may also need to change your dissy for an electronic advance model.

The 3.9 chip will need to be re-mapped for the 3.5 and LPG - I use a Motec M48 ECU which is programmable from my laptop on the move and has options for two maps with automatic change over.

With the 14CUX you will need a compromise timing for petrol/LPG or an add-on timing advance module to switch between fuels.

I think you need to get alternative pricing for both the tank testing and carb rebuild.

The tank in my 101 cost $180 a few years back and the carb kits are relatively cheap and can be installed your self as long as you note needle settings etc when pulling apart. The wear bits are the diaphram and when on gas the needles wear due lack of lubrication. With a bit of reading ("google" is your friend) you could do the work yourself to get it running and then send it in for a proper tune to finalise adjustments - alternatively paying someone should be far less than $1000.

Garry

Yep, rebuild kits are fairly cheap, and can be found on ebay.

I had mine done in Adelaide a few years ago, and set me back less than $400.

Needles are the hardest bit to find.

................or you could try and find an Edlebrock manifold and use the Holly with appropriate jets. Re jetting is reasonably easy these days on a dyno, with an oxy sensor up its bum. Two barrel Holy is OK, 4 is really good. Set economy on the first two and "go to orbit" when the other two kick in

Carbys fulfill the KISS principle

RF

CD175's as per OEM, rebuild kits are $75ish from MR and take me about 4 hours to get fitted and running.

Originally Posted by StuRR80

T
LPG tank $450-550,
carbs approx $1000

Forget the Holly


Same as garrycol suggestion ... Just Fleebay a carb kit and do it yourself .... or take Dave's advise


alternatively


Either install the 14CUX kit or go Lotz-A-Landies path

goodness me, i wish i could get away with 1k for carb overhauls

as dave says, they are an easy and simple carb to rebuild, and imo the best carb for a 3.5.


jc

Thanks for all your advice guys I'll give them a buzz in the morning to see if something got lost in translation between them saying $1000, me dropping the phone and then being stunned and hearing blah, blah, blah....!!! If there's anything more to it, then I'll let you know.

Re the EFI, they said 10-12 hours roughly but would need an auto elec to plumb in the harness and a new cam if I had everything else but they'd rather not do it, is the impression I got. How different are the cams? Rather, I'm assuming or can it be mapped around?