110 Dom Posted November 6, 2009 Share Posted November 6, 2009 Hi, After a long period of being off the road my 110 V8 CSW is almost ready to go back on the road. It has a 3.5V8 and has quite a bit of top end work done, new cam, new cam followers, timing chain, heads skimmed, along with new running gear etc. Yesterday it fired up quite nicely for the first time in 5 years which was good to hear. The chap who is helping me with it says he needs to set the carb mixture due to a new higher lift cam that has been fitted but he does not have the tool to do it. Does anyone know what this tool is, If its not very specialised I could make one if I know the details? Any help, pictures etc greatly appreciated. Dominic Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted November 6, 2009 Share Posted November 6, 2009 Struggling to recall when I last worked on carbs ..........but 'special tools' = non Mixture can be adjusted within 'a range', over the setting available then you need to change the jets. I had a 10.5:1 early V8 on SUs and it had HUGE Jets in it plus a Piper 270 cam plus other mods Not sure what he is on about, can't rememeber using any 'speical tools' other than to change the jets There again its 20+ years since I last touched carbs But will be suprised if the above is far wrong ? Nige Quote Link to comment Share on other sites More sharing options...
MikeAK Posted November 7, 2009 Share Posted November 7, 2009 Hi, Does it have SUs or Stromberg carbs? If Stomberg I seem to remember on my old Triumph there was a tool you inserted down the dashpot to adjust the mixture. It was like an Allen key in a sleeve, the sleeve stopped the piston/diaphram turning while the allen key was rotated to move the needle up and down. Can't remember if it could be done without the tool. I THINK it was one of these. Fleabay linky Quote Link to comment Share on other sites More sharing options...
missingsid Posted November 7, 2009 Share Posted November 7, 2009 It always surprises when I hear of Stromberg's on a LR V8. All I have seen is SU's. The previous post is correct IIR, but if it turns out you have SU's then it's just a screwdriver required for HIF carbs. Stromberg tuning info Clicky. Article thanks to John H. Twist of University Motors Marc. Quote Link to comment Share on other sites More sharing options...
110 Dom Posted November 7, 2009 Author Share Posted November 7, 2009 Thanks for the helpful replies. I cant get to the vehicle until Monday but I have just googled images of Stromberg and SU carbs and I am 99% sure whats on are a pair of strombergs. The link to the Stromberg mixture adjustment site should come in very handy thanks and if I can find anyone locally who has a tool then I now know where to buy one thanks. I will print out and have a read through tonight. I bought all the engine upgrade parts ages ago and due to also choosing a high lift cam the guys from RPI Engineering also sold me new carb needles. I have just found out that the needles do not fit and maybe the RPI guy thought it had SU's on and thus I have the wrong ones? Do you know if due to a high lift cam I will need the different sized kneedles or is it possible that there could be enough adjustment with the old standard ones and how do I know what setting to use? Probably in the setting instructions which I will read but just incase it doesn't cover settings for a high lift cam thought I would mention. I am not sure if I needed a high lift cam but someone said I will get a few more brake horse and its not a bad thing to do and its in now. I am guessing it will use more fuel than a standard cam and from memory when the vehicle was last on the road it was thirsty enough then!! Once she is fully ready for the road I think I will be looking into a suitable LPG conversion! Thanks Dominic Quote Link to comment Share on other sites More sharing options...
Briarston Posted November 7, 2009 Share Posted November 7, 2009 Hi, Does it have SUs or Stromberg carbs? If Stomberg I seem to remember on my old Triumph there was a tool you inserted down the dashpot to adjust the mixture. It was like an Allen key in a sleeve, the sleeve stopped the piston/diaphram turning while the allen key was rotated to move the needle up and down. Can't remember if it could be done without the tool. I THINK it was one of these. Fleabay linky Hello Yes, that's the tool you need to do it properly. I've still got mine from when I had a Rangie V8 (1979 model) If you try to adjust with only an Allen key, it's likely to damage the diaphrams, as the piston is not "guided" as in the S.U. carb. The outer sleeve engages with slots in the piston rod. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted November 8, 2009 Share Posted November 8, 2009 Having spent years tinkering/fettling/begging with a 2.5 petrol carb IMHO the best way to adjust carbs is: Quote Link to comment Share on other sites More sharing options...
mickeyw Posted November 9, 2009 Share Posted November 9, 2009 It always surprises when I hear of Stromberg's on a LR V8. All I have seen is SU's. The previous post is correct IIR, but if it turns out you have SU's then it's just a screwdriver required for HIF carbs. Stromberg tuning info Clicky. Article thanks to John H. Twist of University Motors Marc. LR built 90 & 110 V8s with the Stromberg CD175 for a few years, until I believe about 1989? Then they fitted SUs. Strombergs are also found on earlier RRCs. If your engine has been standing for some time it will be worth your while fitting new rubber diaphragms to the carbs. They don't last for ever and make the engine run very poorly when they're knackered and balancing the carbs will be near impossible. Signs of knackeredness are not always obvious, all it takes is a small pin prick of a hole. Details of dismantling Strombergs are well covered in LR manuals. The manuals you can download at Green Oval are a bit too new for this but hopefully someone can point you in the direction of some older data. Failing that I can scan some pages from my oily paper bible for you. I have an adjusting tool somewhere that I bought from Halfrauds yonks ago when carbs were all the rage It might have been a Sykes Pickvant kit. However the ebay one linked above looks about right. One thing to watch out for - I THINK that while the later carbs have a hexagon socket down the middle, the earlier ones were a screwdriver slot. You'll need to unscrew the dashpot damper, empty out any oil (if it's not gone already) and have a looky inside to find out. Hope this helps, Quote Link to comment Share on other sites More sharing options...
110 Dom Posted November 9, 2009 Author Share Posted November 9, 2009 Thanks again for the help. I have enough literature to do the job now so fingers crossed my 110 will soon be running sweet. Once its sorted I will include a pic on my profile as its starting to look quite good although I have found out its quite easy to spend money on it!! Cheers Dom Quote Link to comment Share on other sites More sharing options...
sussex-landy Posted November 8, 2011 Share Posted November 8, 2011 Did you get the stromberg adjusted and balanced, I have the same issue on my V8 with twin strombergs and need to make sure the mixture is correctly balanced and set. thanks Robert Quote Link to comment Share on other sites More sharing options...
secondjeremy Posted November 8, 2011 Share Posted November 8, 2011 I had a Stag with strombergs on it - and it really did pull well when I got it all right. I recall that in fact only one carb was adjustable and that it was only meant as a trimmer to get them balanced. The Strombergs had the float chamber underneath the needle - while the SU's had a separate float chamber - Rover used SU's for their cars but Strombergs on the Range Rover and many 6 cylinders as its less affected by operation on inclines than a carb with a separate float chamber. Some Stromberg setups have a choke control on one carb only. The Stag had a double cable and chokes on both. The adjusting tool was a hollow tube (quite thick walled) with a small roll pin close to the shaped end which engaged with a slot in the piston - and a long allen key to engage with the screw adjuster for the jet. High lift cam - should improve breathing - so need bigger carbs if you're going to use full revs. To get the best you really need to have the thing set up on a rolling road - then someone will probaly say they can't get the needles for the strombergs . . . Burlen make SU's and bits for other carbs - may be worth a look at their site. Quote Link to comment Share on other sites More sharing options...
zoltan Posted November 8, 2011 Share Posted November 8, 2011 Back in the day you'd richen the mixture by putting the needle in a pillar drill on high speed and reducing its diameter at the necessary height with emery cloth or a file Quote Link to comment Share on other sites More sharing options...
zim Posted November 8, 2011 Share Posted November 8, 2011 Having spent years tinkering/fettling/begging with a 2.5 petrol carb IMHO the best way to adjust carbs is: unfortunately, i'm agreeing with this method. the best tool i found was EFI Quote Link to comment Share on other sites More sharing options...
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