Twin SU Carbs - Hif 44 1 3/4"

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DKWW2000
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

ian65 wrote:I thought S3 inlets blanked off the EGR port :?
Good idea to fit stainless core plugs into the water channels, a touch of RTV then new O rings with the new gasket.
I made my own gasket which covers them up, as the Inlet is solid. I can always re-instate easily then.
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

Connected up today, She started 2nd turn (sounds throaty) yay
Strange thing, after she warmed up I decided to tidy everything up, fuel lines etc She would only start/run when the return fuel line was made with braided pipes :? If I used any other pipe it would not even fire? Took a while to work this out.
These are the run off/float chamber return lines which only flow when the float gets stuck, this was not happening but there must be a logical reason. On a Austin Maxi I had if the float got stuck it overflowed onto the exhaust manifold :o
Pictures will follow soon. Test drive on Monday sya
I am after a set of OMP lines if any are For sale?
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by spirit r »

Which fuelpump did you use Pete?
Omp lines http://ausrotary.com/viewtopic.php?f=16&t=184799
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

spirit r wrote:Which fuelpump did you use Pete?
Omp lines http://ausrotary.com/viewtopic.php?f=16&t=184799
Thanks Thomas, At the moment I have kept the existing stock pump, from what I have read it should be OK.
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

Sorted out the pipework a bit more today & changed the OMP for a new one. The new one "Ticks", if you touch it you can feel it ticking as well? is this normal as I have never noticed it before :?:
Image
Confirmed the brakes were OK & took her for a spin sya
Image
She growls when you put your foot to the floor, which quickly turns into a snarl at about 5000rpm.
It is certainly a lot quicker & louder, power is there from the start & feels like a lot more torque. Does not feel lumpy on deceleration below 2000 rpm.
Image
Image

Not sure I like the look of the engine bay :o I miss the blue Air Filter & it seems to have lost its charm (I do like the performance though).
I will now set about cleaning up the old manifold & carb & see how I get on with the change.
Image
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by myatt1972 »

Lovely job there Pete, I like the look of the engine bay.
I said the same as you about seeing how I would get on with a change of carbs and they're still on ;)
Keith...
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

Can I now put TC after the MAZDA badge :lol:
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by Hobbawobba »

That is very cool! I quite like the look of them aye
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by DKWW2000 »

Hobbawobba wrote:That is very cool! I quite like the look of them aye
Thanks Jess, I am now going to try & reduce the excess wiring loom so I am going to try And make another that will plug in & just supply that which remains.
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
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Re: Twin SU Carbs - Hif 44 1 3/4"

Post by ian65 »

DKWW2000 wrote:
Hobbawobba wrote:That is very cool! I quite like the look of them aye
Thanks Jess, I am now going to try & reduce the excess wiring loom so I am going to try And make another that will plug in & just supply that which remains.
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.

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