SU carb with TB/tps and no Butterfly?
Turbo Mini Forums

had a thought all be it probaly silly one?

could i remove the butterfly from an su carb pluging it up to not leak and run a moder tps and buterfly from an ingected car?

this is regarding my 1098 based turbo running the HIF44 turbo carb

im wanting the tps for mapping and tuneing and ill most probaly go to efi later and use it then aswell

my thinking is so long as the intake volume is controlled into the engine there wont be any problems its simpaly moveing the butterfly from the carb to be inline with he boost pipe lines and engine vacume will still lift the plunger as nomal?

im just thinking its easyer to remove the butterfly and keep the shaft there to plug the holes and put a modern tps/tb inline before the carb rather than make something else fit the SU carb and work?

Why? Just fit a tps on to the carb

You probably could though if the tb is in the right place

Yes i moved to the darkside

Instagram @jdm_brett

The su carb wont work with a throttle infront of the piston.

Youd have to fit stuff in the order of inlet, throttle body, carb. But Brett had a tps mounted to his carb and it looked easy enough, it would be less clutter too.

i slapped mine together in a couple hours as a temporary test, it lasted 3 years and now is on a mini is spain

Yes i moved to the darkside

Instagram @jdm_brett

ahh k

brett do you rember what car it came from??

any pics?

Double post

Edited by Carlzilla on 22nd Nov, 2014.

I think you're looking at it the wrong way round colin, i meant inlet as in inlet manifold, so the tb would bolt on to the butterfly side of the carb, and not the 'air filter' side. I understand that if the throttle was fitted the other side of the carb, the vacuum draw on the engine would just keep pulling fuel from the jet, and flood, and probably not run in the first place.

im a dumb ass haha of course the butter fly is before the suction piston and venturi so ther for as said the proposed tb must go in between the manifold and carb there for POINTLESS!!!! as more or less said already haha im a dumb ass and should have looked at the carb not gone by may crap memory and beer filled thoughts...

so back to a more reasonable approach adding a tps to the hif 44 turbo carb?

hopefully brett can shed some light on what tps he used and how it was mounted up

Dumb question. But reading up on this and it sounds like it is something Intresting however... i don't now what tb/tbs is? Is it something like rover did with the spi? Strip out a carb to put an injector inside?

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

From a few years back, SU carb with TPS:

ive been picture digging, unfortunately i think these pictures were lost on a laptop between backups
it was deffinately off a fiesta 1.2 ( same one as the edis and coil pack )

i did find one pic but the angle is not great


edit ha good old sale thread told you it was slapped together, never even bothered trimming the bolts

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Edited by Brett on 22nd Nov, 2014.

Yes i moved to the darkside

Instagram @jdm_brett

ah trothle position sensor. okey my bad. what is it good for? i know it works well as a trigger with nos. so the nos cant shoot if the trotle is not fully open

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

tb = throttle body
tps = throttle position sensor

no a carb engine no real benefit imo
i data logged alot of sensors, a tps sensor helps to see what i am doing in the logs,
i also had mapped boost control at one point based of rps and tps

Yes i moved to the darkside

Instagram @jdm_brett

Either having a blonde moment or bein really dumb here but whats the valve in the pipes off the carb?

On 22nd Nov, 2014 Brett said:
ive been picture digging, unfortunately i think these pictures were lost on a laptop between backups
it was deffinately off a fiesta 1.2 ( same one as the edis and coil pack )

i did find one pic but the angle is not great


edit ha good old sale thread told you it was slapped together, never even bothered trimming the bolts

brett is that a bit of brake line tubing crimped onto the spindle shaft and jammed into the tps? lol if so looks not to hard to accomplish

the valve maby a bleed valve? we know Brett likes big boost

had an actual look at the carb this arvo and i see hoe silly my suggestion was now! also bought an e gay 2 doller special see how it works err mabys dosent work out?? planing to get to a scrappy this week see how that goes

I'm either being blind or stupid, but I don't see any valves on the carb? The only thing i can see that you may be on about is the tee barb screwed into the inlet which looks like the one off a T3.

Firstly i should point out that the carb is far from standard it was an na carb internaly modified for boost
The bleed valve is part of one version ( probabaly v1.4832.a) lol
Its an early version of my lean off settup this one had an adjustable maximum lean off and was controlled by ms2 with a fast solenoid valve
I revised the settup many times and ended up simplifying it alot,

The tps ' extension ' was a bit of steel tube with a nut welded on one end and a blade in the other

On 23rd Nov, 2014 Turbo This.. said:
brett is that a bit of brake line tubing crimped onto the spindle shaft and jammed into the tps? lol if so looks not to hard to accomplish

the valve maby a bleed valve? we know Brett likes big boost

had an actual look at the carb this arvo and i see hoe silly my suggestion was now! also bought an e gay 2 doller special see how it works err mabys dosent work out?? planing to get to a scrappy this week see how that goes

Yes i moved to the darkside

Instagram @jdm_brett

On the lil picture attachment not big pic

That makes more sense!

It's a bleed valve in the part throttle lean off. Helps with fine tuning. A solenoid works even better.

typicaly worked till all the shops were closed so no tps as yet grrr

it sounds like its a bit of an art to get the fueling where its needed with the carb? ie not just slimming the needle down for more boost lol