Twin SU Carbs - Hif 44 1 3/4"

Anything related to fuel delivery, induction, turbos, emission control & exhausts
User avatar
DKWW2000
VIP User
VIP User
Posts: 1625
Joined: Sun Jul 06, 2014 10:16 pm
Location: English Riviera - South Devon
Has thanked: 183 times
Been thanked: 187 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

ian65 wrote:
if you can get a spare engine loom to dissect it's easy.... these are the connections at the plug on the inner wing... water temp 2 is the water temp sensor on the back of the water pump housing which controls the choke magnet.
.
Thanks Ian, that is a great help, I do have a few old looms, but worse case I could always make up a new one 0-0
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander
User avatar
DKWW2000
VIP User
VIP User
Posts: 1625
Joined: Sun Jul 06, 2014 10:16 pm
Location: English Riviera - South Devon
Has thanked: 183 times
Been thanked: 187 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

I have now replaced the wiring loom with a thinned down version & removed the "Rats Nest":-

Image

Image

Image

QUESTION? On the inlet I have only 1 connection point for the Advance/Retard Vac. I tried just connecting it to the Leading Vac & also both by using a Y connector & have not noticed any difference.................is there a best option?

Image

The open space in the bay is now growing on me & having driven over 200 miles with them I do like the power delivery from low revs, the smooth acceleration/slowing down. Engine braking is non existent though.
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander
User avatar
ian65
Admin
Admin
Posts: 6402
Joined: Wed Mar 30, 2011 12:11 am
Has thanked: 315 times
Been thanked: 376 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by ian65 »

I think that looks really great Pete.... I much prefer the clean look. My Elford also only has the one vac connection into the SU like yours which then splits with a Y coupler to each pot on the dizzy and mine works ok.

1999 Jaguar XJR V8 Supercharged

1992 Peugeot 205 1.9 GTI
2003 Mercedes SLK 200 Kompressor
User avatar
Rexi84
Posts: 180
Joined: Wed Feb 22, 2012 11:32 am
Location: West Midlands
Been thanked: 1 time
Contact:

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by Rexi84 »

Wow like the look of this setup a lot! th:
'Dont fear the rotor'
User avatar
MelloYello
VIP User
VIP User
Posts: 1151
Joined: Wed Jun 01, 2011 8:42 pm
Location: London, England.
Has thanked: 22 times
Been thanked: 52 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by MelloYello »

Engine bay goals right there.
User avatar
myatt1972
VIP User
VIP User
Posts: 1565
Joined: Thu Mar 31, 2011 10:54 am
Location: Staffordshire Moorlands
Has thanked: 40 times
Been thanked: 37 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by myatt1972 »

That looks great Pete s(c)
My vac lines aren't even connected so don't worry too much.
Keith...
User avatar
spirit r
VIP User
VIP User
Posts: 1895
Joined: Sat Feb 09, 2013 4:15 pm
Location: Germany Black Forest
Has thanked: 473 times
Been thanked: 253 times
Contact:

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by spirit r »

I like your functional detail work Pete. Never saw twin SU carb feeding an 12a rotary. Your outstanding car will be more and more exotic and in perfect condition.(c)
"Das hast du gut gemacht Peter" th:
KiwiDave
VIP User
VIP User
Posts: 2268
Joined: Sat Nov 05, 2011 8:07 pm
Location: Feltham, Southwest London
Has thanked: 482 times
Been thanked: 192 times

Re: Twin SU Carbs - Hif 44 1 3/4"

Post by KiwiDave »

Never thought I'd actually want a SU setup on anything. Nice th:
1985 Sunrise Red S3 TWR
2006 Mercedes CLK 280 Sport AMG
Post Reply

Return to “Fuel, exhausts, emission systems & turbos”