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Carb/needle help Twin Su's need to go.
https://www.ausmini.com/forums/viewtopic.php?f=2&t=68584		 Page 1 of 1
Author:  NG [ Sun Jan 30, 2011 12:19 pm ]
Post subject:  Carb/needle help Twin Su's need to go.
I'm not have the best of luck with these things at all. :(

im really over them, he did the mixture was running great for about 30mins but now the car keeps dropping to stal & is slightly missing. (balancing) ??

broke down again on the highway, then she started again got home..

but stressed the whole drive home, i'm not enjoying the car right now.

under load it's struggling & has no power.

I'm thinking, i have a rebuilt hiff44 & a mini spares manifold, is there a way i can work out what needle i need?

Do i need to go to a dyno? wich i don't mind, maybe the needles i have in my twin su's i can then work out what needle i need in the hiff44? i have a adapter to run a non swinging needle if need be.

then get it tuned? just dyno's are saying we need a full day? seems to long to me.

would have thought 1 hour or 2 to just do the carby would be enough? maybe i'm wrong.

I have the following spec & would like to run a single carb.

1293cc
Hiff44
25-65 cam same as Kent 266 cam??
Quaife diff
1.3 full roller Titan rockers
Med Supercharger light back plate uprated Pressure plate & flywheel balanced.
Gearbox has been cryo treated & some parts shot Peened (hel box)
Main flow stage 3 Extractors ceramic coated.


HEAD
8.6-1 comp fully Fast road light Race spec head

The inlets are enlarged to accept a 35.6mm valve, the guides bullet-nosed & the boss restriction is removed. The seats are 3-angle.
fully ported, features enlarged chambers to lower the compression, has 3 angle valve seats on the inlets, new silicone bronze guides {bullet nosed} are fitted, as are new valve stem oil seals, new 185lb double valve springs
Exhaust.
29.4mm nitrided 21NS stainless steel race valves.
Inlet.
35.6mm nitrided 21NS stainless steel race valves for improved flow.
Chambers.
*High swirl chamber design opened out to 26.5cc {or larger on request} to lower the compression & allow you to safely run more boost, valves fully deshrouded.


any idea's a Hs6 needle for that spec to start on?
thanks.
Author:  Fiji [ Sun Jan 30, 2011 6:36 pm ]
Post subject: 
take it ready, he'll sort it out. dyno run 80 MPH around his backstreet circuit. just hold on tight.
Author:  NG [ Sun Jan 30, 2011 6:46 pm ]
Post subject: 
Where Fiji?
Author:  drmini in aust [ Sun Jan 30, 2011 6:47 pm ]
Post subject: 
NG wrote:
Where Fiji?

I think he means Matt Read, TheMiniMan. :P
Author:  NG [ Sun Jan 30, 2011 6:54 pm ]
Post subject: 
oh yeh if the stupid car would even drive properly.
Author:  TokenRednut [ Sun Jan 30, 2011 7:43 pm ]
Post subject: 
check timing?
Author:  TheMiniMan [ Sun Jan 30, 2011 9:36 pm ]
Post subject: 
HIF type carbs normally have a "bi-mtalic" strip Jet adjuster,,, quite often they work a little too good

many people have ripped them out & made a fixed/solid one

when the bi-metalic strip feels some heat, it leans-off the carb quite conciderably

just saying all this as it "'""""May""""" be your issue

but then again it """may""" not either

probably need the car for a few hours to sort it tho

it could be any number of things causing it other than the carb,,, the carb could be perfect & we may end up chasing a fuel delivery problem or a manifold leak or,,, or,,, & / or,,,--->

:-)
Author:  Lockie91 [ Sun Jan 30, 2011 10:33 pm ]
Post subject: 
did that mechanic you took the car to the other day, fiddle with the dissy did he?
Author:  blue_deluxe [ Sun Jan 30, 2011 10:57 pm ]
Post subject: 
Lockie91 wrote:
did that mechanic you took the car to the other day, fiddle with the dissy did he?


He runs megajolt. The best way to distribute sparks.
Author:  Lockie91 [ Sun Jan 30, 2011 10:58 pm ]
Post subject: 
blue_deluxe wrote:
Lockie91 wrote:
did that mechanic you took the car to the other day, fiddle with the dissy did he?


He runs megajolt. The best way to distribute sparks.


yeah thats wat i thought, but I seem to remember him taking that off and selling it now??
Author:  NG [ Mon Jan 31, 2011 7:30 am ]
Post subject: 
No I'm running twin su"s with a dizzy, will be still using mega jolt
Just buying a fancy harness for it.


Car is fine just running to rich, so I wanted to fix that so nothing should
Have been touched.

They are rebuilt and have been fine for 19,000km
Thy do seem to go out balance every while though.

He re tuned it and did mixtures that's fine but he did not balance it
Right.

I would prefer to run a single anyway

So my question is with My spec above.

all I ask if anyone had a needle reccomendatiom i could start with for a hs6 or hiff44.

That would be great :)

So does anyone actually have a recomendation?
Author:  Lockie91 [ Mon Jan 31, 2011 9:06 am ]
Post subject: 
NG wrote:
No I'm running twin su"s with a dizzy, will be still using mega jolt
Just buying a fancy harness for it.




BAM!!! Got your there Joe!! :lol: :lol: I knew it.. :lol: sorry but I had to prove yah on the bet, now to fb :P


only reason I asked that nick, was by saying "he tuned the car" I would have thought maybe he fiddled with the dissy and buggered your timing thinking he knew what he was doing , but not really,, hence maybe causing those bubbles and carry on's you describe it has under acceleration..... its just a thought..
Author:  superSeven [ Mon Jan 31, 2011 9:17 am ]
Post subject: 
NG wrote:
No I'm running twin su"s with a dizzy, will be still using mega jolt
Just buying a fancy harness for it.


Car is fine just running to rich, so I wanted to fix that so nothing should
Have been touched.

They are rebuilt and have been fine for 19,000km
Thy do seem to go out balance every while though.

He re tuned it and did mixtures that's fine but he did not balance it
Right.

I would prefer to run a single anyway

So my question is with My spec above.

all I ask if anyone had a needle reccomendatiom i could start with for a hs6 or hiff44.

That would be great :)

So does anyone actually have a recomendation?


Give Lindsay a call, he got me on the right track with a needle for my 1293, HIF44, mild cam, not too crazy compression. Made it run much better than what was in it previously!
Author:  NG [ Mon Jan 31, 2011 3:09 pm ]
Post subject: 
Lockie91 wrote:
NG wrote:
No I'm running twin su"s with a dizzy, will be still using mega jolt
Just buying a fancy harness for it.




BAM!!! Got your there Joe!! :lol: :lol: I knew it.. :lol: sorry but I had to prove yah on the bet, now to fb :P


only reason I asked that Nick, was by saying "he tuned the car" I would have thought maybe he fiddled with the dissy and buggered your timing thinking he knew what he was doing , but not really,, hence maybe causing those bubbles and carry on's you describe it has under acceleration..... its just a thought..


lol no no, i have been running it for ages with no problems, its very good just needs be tuned,

i just have gone back to the dizzy as i was up grading to braided wire harness for a more period look & hide the high tech stuff.

then the blower go's on & a Dyno run.
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