Hi guys,
What is a better choice?
triple 175 SU or triple 175 Stromberg CD???
I have triple 150 Stromberg CDs at the moment on my worked 202.
I find them now too small since my recent rebuild.
cheers
What is better? SU or Stromberg CD
Started by
LC-069
, Oct 12 2008 06:20 PM
19 replies to this topic
#1
LC-069
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Posted 12 October 2008 - 06:20 PM
#2
_rocket_
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Posted 12 October 2008 - 08:22 PM
No comparison, throw a set of 2 in. SU s on, dont look back !
#3
orangeLJ
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Posted 13 October 2008 - 08:41 AM
2inch SUs?
you would be much better off running a set of 40mm webers.
you would be much better off running a set of 40mm webers.
#4
_@milco@_
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Posted 13 October 2008 - 09:53 AM
1.75 integral bowl su's are better than 1.75 strommy's, next step up is 2 inch su's, the 40mm webbers/dellautos are the bomb awsome carbys, for a holden 6cyl i dont think you need any bigger than a 40mm webber/dellautos....... imo
#5
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Posted 14 October 2008 - 08:47 AM
45s can work ok on a heavily worked holden 6, but yes, most times they would be overkil IMO.
#6
Bazza
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Posted 14 October 2008 - 08:56 AM
Hi
You have to wonder why GMH settled on CD Strombergs for their XU-1 performance engines when they could have chosen any other make of carburettors that were available.
Bazza
You have to wonder why GMH settled on CD Strombergs for their XU-1 performance engines when they could have chosen any other make of carburettors that were available.
Bazza
#8
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Posted 14 October 2008 - 09:01 AM
I suppose you have to wonder why they used SU s and half the webbers on the touring cars aswell ?
#9
_@milco@_
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Posted 14 October 2008 - 09:07 AM
45s can work ok on a heavily worked holden 6, but yes, most times they would be overkil IMO.
even on a heavly worked 6cyl i reckon they would be overkill ( street car we are talking here, race car difrent story), 40mm FTW...........
#10
orangeLJ
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Posted 14 October 2008 - 09:15 AM
I was talking overall, not just for the street, but dont worry I agree 
#11
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Posted 14 October 2008 - 09:34 AM
The half webers I was talking about were the 58mm units on Morris Xu1 by the way, where they blocked off 1 side to get a big fuel bowl.
#12
smeer
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Posted 14 October 2008 - 10:54 AM
Hi
You have to wonder why GMH settled on CD Strombergs for their XU-1 performance engines when they could have chosen any other make of carburettors that were available.
Bazza
As the story goes, they build the LC XU1 from a box of spare/scrap parts. Strombergs it was at the time, but why they didn't change from CDs when they went up in capacity (175)? who knows.
Tightarses probably correct
Edited by smeer, 14 October 2008 - 10:59 AM.
#13
_CraigA_
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Posted 14 October 2008 - 11:15 AM
A choice based on price is probably right. But maybe tuneability/stability was also a factor. With quality linkages there's not a whole lot to go wrong and I'm sure warranty cost was a factor.
Would be an interesting question to ask Harry Firth.
Would be an interesting question to ask Harry Firth.
#14
_gtr-xu1_
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Posted 14 October 2008 - 11:40 AM
rocket. they blocked off one side to comply with group C rules running the 58mm carby throat feeding 2 cylinders compared to a 44.45mm 0f a 175
Edited by gtr-xu1, 14 October 2008 - 11:42 AM.
#15
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Posted 14 October 2008 - 02:35 PM
Why not just use a 2 in SU, and get 50mm ? Well suppose they did on Harveys car .
#17
_@milco@_
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Posted 14 October 2008 - 03:12 PM
i think the rules where you had to use the factory manifold and not increase the number of carby throats, so thats they they blocked one off,
#18
lcgtrrob
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Posted 14 October 2008 - 04:56 PM
just curious guys,why do you say su's are better than strombergs,i always thought strombergs were the best allrounders
#19
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Posted 14 October 2008 - 08:07 PM
I guess it depends on what you are using them for. Ive always found SU s to be good, paticularly 2in on a good manifold like cain or seton, never used webers on a six, only the IDF s on this car, wonder sometimes if its worth the dramas. Best talk to the NC guys about this subject.
#20
_gtr-xu1_
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Posted 14 October 2008 - 09:50 PM
correct milco. they had to have same amount off carby throats as factory
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