mate my advice after having twin su's & still having them they are great but a pain in the ass.
i would go a hiff44 single
get hold of the gunson thing & tune best would be go to a dyno & get it set up right
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| how to tune twin 1/2.5 SU's https://www.ausmini.com/forums/viewtopic.php?f=2&t=68330 |
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| Author: | (SuX-855) [ Wed Jan 19, 2011 10:47 am ] |
| Post subject: | how to tune twin 1/2.5 SU's |
how do u tune then one side is running really lean and the other basickly nothing |
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| Author: | Wombat [ Wed Jan 19, 2011 10:53 am ] |
| Post subject: | |
http://www.sterlingbritishmotoringsocie ... _Carbs.pdf |
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| Author: | (SuX-855) [ Wed Jan 19, 2011 11:12 am ] |
| Post subject: | |
i still got no clue its running rich i know that much |
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| Author: | Hanra [ Wed Jan 19, 2011 11:16 am ] |
| Post subject: | |
Pretty open ended question..... Whats the condition of both carbs? Throttle bushes etc. What needles are they running? What springs are they running? What dashpot oil are they running? Have they been kitted recently? Are both float levels correct? Are they balanced correctly? What engine capacity and mods? Invest in one of these: http://www.gunson.co.uk/item.aspx?cat=675&item=1813 and one of these: http://www.gunson.co.uk/item.aspx?cat=0&item=1822 |
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| Author: | Wombat [ Wed Jan 19, 2011 11:21 am ] |
| Post subject: | |
Check the basics first - same needles both sides - float bowel set up the same - start with same number of turns on the jet- then follow the above manual step by step |
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| Author: | BBY755 [ Wed Jan 19, 2011 11:26 am ] |
| Post subject: | |
yep - Gunson to the rescue - Carbalancer and Colourtune - easy peasy!!! |
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| Author: | (SuX-855) [ Wed Jan 19, 2011 11:29 am ] |
| Post subject: | |
how do u find out what needle it is im a noob and dont wanna stuff it up |
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| Author: | Hanra [ Wed Jan 19, 2011 11:32 am ] |
| Post subject: | |
If thats the case, perhaps you should ask for some guidance from an experienced SU tuner in your area? |
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| Author: | NG [ Wed Jan 19, 2011 11:35 am ] |
| Post subject: | |
mate my advice after having twin su's & still having them they are great but a pain in the ass. i would go a hiff44 single get hold of the gunson thing & tune best would be go to a dyno & get it set up right
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| Author: | Hanra [ Wed Jan 19, 2011 11:38 am ] |
| Post subject: | |
Wombat wrote: http://www.sterlingbritishmotoringsociety.org/files/Tuning_SU_Carbs.pdf
If you take the time to read through this it will explain/show how to remove the needle from the piston assy. You will need to do this and look around the top shank of the needle it will have engraved in it a combination of letters/numbers, numbers only or letters only. Compare both needles and ensure they are the same. What vehicle did these carbs come off? |
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| Author: | (SuX-855) [ Wed Jan 19, 2011 11:47 am ] |
| Post subject: | |
not to sure they were on the car when i bought it |
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| Author: | Hanra [ Wed Jan 19, 2011 12:24 pm ] |
| Post subject: | |
Wombat wrote: http://www.sterlingbritishmotoringsociety.org/files/Tuning_SU_Carbs.pdf
Well this will help you a lot. |
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