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drmini in aust
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PostPosted: Tue Apr 08, 2008 10:33 pm 
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I run twin 1-1/2s on the wife's 1293 but I wouldn't put them on a 1098.
My 1132 Moke is getting a 40DHLA Dellorto and 1275 head (coz I have one). :lol:

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sports850
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PostPosted: Tue Apr 08, 2008 10:34 pm 
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Other thing to remember is a twin 1 1/2" manifold is harder to find and will probably cost more again than a twin 1 1/4" one .

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sgc
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PostPosted: Tue Apr 08, 2008 10:34 pm 
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If you're upgrading from a single 1-1/2" or 1-1/4" and you've got a half decent cam and exhaust, you'll notice a pretty substantial improvement. Mine was a different car 8)

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drmini in aust
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PostPosted: Tue Apr 08, 2008 10:40 pm 
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Best twin HS2 manifolds are the non-Cooper ones, like the square one Ian posted.
Factory ones have a crap shape at the balance pipe.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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sgc
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PostPosted: Tue Apr 08, 2008 10:41 pm 
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drmini in aust wrote:
Best twin HS2 manifolds are the non-Cooper ones, like the square one Ian posted.
Factory ones have a crap shape at the balance pipe.


What sort of improvement would you see with that manifold?

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sports850
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PostPosted: Tue Apr 08, 2008 10:44 pm 
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drmini in aust wrote:
Best twin HS2 manifolds are the non-Cooper ones, like the square one Ian posted.
Factory ones have a crap shape at the balance pipe.


I always thought they were cheap and nasty , I was going to swap the rebuilt twins from that one to a BMC one but won't now .

Some more pics of similar manifolds for the hell of it then .

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drmini in aust
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PostPosted: Tue Apr 08, 2008 10:54 pm 
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sgc wrote:
drmini in aust wrote:
Best twin HS2 manifolds are the non-Cooper ones, like the square one Ian posted.
Factory ones have a crap shape at the balance pipe.


What sort of improvement would you see with that manifold?


Vizard said that on factory ones (he says they are bad) you could put a radius from the balance pipe into the port to improve it a bit, but on a 998 Cooper or S manifold the bloody steel location ring is there in the way. :x
I like the old l y n x or Warneford ones, they locate on the studs. Just tidy them up a bit inside and port match to your carbs and head.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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AJ
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PostPosted: Wed Apr 09, 2008 8:49 am 
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tinymorris1969 wrote:
i seriously cant wait to have them in my car. the carbie set up has been sitting on my toolbox for the last 6 months and i gave it to mini king last week and said do wat you gotta do to get them in top nick and ring me when your ready to put them in the car. cause there extremely busy now. so now its only a matter of time.

never thought a mini place would get so busy.


Try David Rosenthal in SA , 0429088100 , he does a very good job , and for a very reasonable price , $180 , complete overhaul for twin SU's, that includes fitting miniature bearings to the shaft , same as weber has ........ you will never have shaft problems again ............cheers

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Matt68
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PostPosted: Wed Apr 09, 2008 9:31 am 
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Don't forget The Maniflow inlet manifold! Better than the square style yet again! Bit more coin, but hey!

They custom make to suit your carb sizes, & head inlet ports, but provide them with flanges to fit any SU carbs. If you change up a size, port the manifold, away you go!

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Cheers

matt

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drmini in aust
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PostPosted: Wed Apr 09, 2008 9:36 am 
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That Maniflow looks like the twin Amal Monobloc one I made back in the 60s, chromed and all. 8)
But mine was 15° to stop the Amal carbs flooding.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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simon k
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PostPosted: Wed Apr 09, 2008 10:05 am 
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mattsmadmini wrote:
or go for a nice single HS6 :wink:


ditto..... HIF44 or HS6

GR's 1400 stroker, 14 second 1/4 mile.... single SU

all the big power motors (small and big bore) in the UK mags run a single HIF44

if you've got twins, use them, if you don't, then sort out a single properly

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Leighton
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PostPosted: Wed Apr 09, 2008 10:37 am 
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thanks for all that, i'll check if ive got left and right and if ive got them ill setup the twin carbies but if not not ill just wait a while untill i get a bit more money....

thanks your help is greatly appreciated.

leighton :D :D :D

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tinymorris1969
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PostPosted: Wed Apr 09, 2008 6:54 pm 
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well when i pull this single carbie off i wanna pull it apart and see whats so special about it. cause when i bought the mini off the girl she told me something had been modified to the carbie to make it run better... and when i put that su i got from mini king the car ran like crap which i think is a hs4 and at the moment i think i got the pommy 1.5 inch

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oil leak?..what oil leak..that puddle under the car is just sweat from all that horsepower

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Leighton
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PostPosted: Thu Apr 10, 2008 3:20 pm 
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yes i have two carbies one left one right, and i have a manifold looking thing that says L Y N X 1100, is the 1100 a problem if i have a 998 engine....

thanks, leighton

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drmini in aust
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PostPosted: Thu Apr 10, 2008 3:26 pm 
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No prob at all the manifold is fine for both.
a 998 is just a destroked 1098... :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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