| Author |
Message |
    
Glynn
New User
Username: glynn
Post Number: 2
Registered: 5-2004
| | Posted on Thursday, 24 June, 2004 - 01:02 am: |    |
Hi all,
Would it be feasable to place a "tap" into the exhaust balance pipe, so that one could then isplate each bank and then be able to tune the carb on each respective bank with a CO meter. This in my mind would be an easy way of setting up each bank to be the same reading as each other.
I am having trouble setting up (balancing) the twin SU's on my car.
Thanks in anticiptation.
Glynn Waterworth. |
Robert Chapman
Prolific User
Username: shadow
Post Number: 52
Registered: 5-2003
| | Posted on Tuesday, 29 June, 2004 - 08:28 am: | |
Hi Glynn,
As david has pointed out this cant be done,I think the best method is to use two colour tune spark plugs alongside each other[eg No 3A and 4A] to sincro mixtures and two normal vac/gauges to sincro throttle openings.Both these items are inexpensive and have multiple uses. |
Pat Lockyer.
Unregistered guest
Posted From: 81.131.2.107
| | Posted on Thursday, 19 August, 2004 - 05:19 am: | |
Robert C.
Hi do i take the procedure of useing colour tune to set and tune the carbs as the way you perform this task or do you no of another method as my way may be incorrect!
|
Robert Chapman
Prolific User
Username: shadow
Post Number: 68
Registered: 5-2003
| | Posted on Monday, 30 August, 2004 - 08:07 pm: | |
Pat L,
Yes, you are probably right. |
Pat Lockyer.
Unregistered guest
Posted From: 81.131.55.156
| | Posted on Wednesday, 01 September, 2004 - 04:31 am: | |
Robert no not always correct,sometimes i get a little wound up and state an incorrect fact.
But would like to know if you carry out the carb tunning as was stated with a colour tune? |
Robert Chapman
Prolific User
Username: shadow
Post Number: 70
Registered: 5-2003
| | Posted on Wednesday, 01 September, 2004 - 08:28 pm: | |
Pat L .
No pat, what you want is to tell us all how YOU do it!Off you go then. |
Patrick Lockyer.
New User
Username: pat_lockyer
Post Number: 4
Registered: 9-2004
| | Posted on Wednesday, 08 September, 2004 - 05:01 am: | |
Robert C. Air fow meter,imission tester,oscilloscope.
Now off you go! your turn. mmju hyyggnn nyyn nhyyy hhhunj |
David Gore
Moderator
Username: david_gore
Post Number: 301
Registered: 4-2003
| | Posted on Wednesday, 08 September, 2004 - 10:38 am: | |
Gentlemen please keep this discussion to the technical content only and not a "I'll show you mine if you show me yours" game.
We all will learn something from you as you are both very experienced R-R/B repairers. |
Patrick Lockyer.
Experienced User
Username: pat_lockyer
Post Number: 6
Registered: 9-2004
| | Posted on Wednesday, 08 September, 2004 - 04:31 pm: | |
Sorry David,
Just spotted the previous posting 9/8/04 and returned on the same tone. mmmm jjhgr gffds vggtreer bg56 bnyhy lkjhhhbm |
Robert Chapman
Prolific User
Username: shadow
Post Number: 73
Registered: 5-2003
| | Posted on Saturday, 11 September, 2004 - 10:18 pm: | |
David,
I believe my answer to Glynns originial post was quite appropriate,he asked a simple question,to which I gave a practical and inexpensive solution.
I did not see any relevance in telling him how I would do the job using tens of thousands of dollars worth of equipment as I presumed that he and most other DIY owners would not have this equipment to hand.
My suggestion of colour tune spark plugs and vac gauges was I thought the most accurate ,practical and inexpensive method for the DIY owner.
I was not impressed by the clumsy and transparent attempt to put me in a position to be contradicted for contradictions sake, in a game of "mine is bigger than yours" .
I am very happy to keep discussion on a technical bases,perhaps we could finish our previous discussion on the categorical statement put forward by Pat L that compression ratio is fixed by the static dimentions of the cylinder and combustion chamber and cant be changed by a different camshaft. |
David Gore
Moderator
Username: david_gore
Post Number: 304
Registered: 4-2003
| | Posted on Monday, 13 September, 2004 - 11:10 am: | |
Robert, thank you for your comments and as you would be aware we have been very concerned about the increasing level of "heated debate" at the expense of relevancy between some users of this Forum. My comment was intended to remind everyone that the prime purpose of this forum is to disseminate information as I believed there was a possibility this topic was about to become another casualty.
We are all well aware of the fact that professional R-R/B specialists have unique experience and knowledge gained at considerable cost over many years and it is unreasonable for us to expect this to be passed on in its entirety to all and sundry free-of-charge. However, what we do appreciate and recognise is a gentle prod or two to point us in the right direction if we are "going off the track" or to correct any incorrect statements. Your assistance in doing this when necessary has been recognised and greatly appreciated by me and no doubt by other forum regulars.
It is also a commercial reality that professional contributors to forums such as this do receive "spin-off" benefits over time in business that they may have not otherwise received. Whilst this may not always be apparent to the specialist; I am personally aware of instances where this has occurred.
(Message edited by david_gore on September 13, 2004) |
Patrick Lockyer.
Experienced User
Username: pat_lockyer
Post Number: 7
Registered: 9-2004
| | Posted on Tuesday, 14 September, 2004 - 08:28 am: | |
Glynn,With regard to R chapmans statement being quite appropriate.
I must state that it is totaly inappropriate for the practical and inexpensive solution.
First if this proceedure is carried out without doing basic checks which a DIY person may not know there is a great risk of engine damage.
Pistons holed,valves burnt out etc.
First useing the colour tune[which i do not] the compressions must be checked.
Then of course the engine timming with the use of the dwell meter and strobe and we are dealing with DIY.
If this is not carried out then the colour of fireing is not at all accurate through the speed temp power settings and disaster will accure.
With regard to a good garage having the best and correct equipment costing hundreds of pounds,
I can speak for ourselves that it is used every day for ordinary and performace cars at a sensible costing not a rip off just because it is a RR.
The carb issue in my opinion is one that should be carried out by any ordinary tuning specialist who understands the carb configuration.
|
bob uk
Unregistered guest
Posted From: 62.253.64.18
| | Posted on Monday, 26 September, 2005 - 05:17 am: | |
This may be of interest.
My car runs on LPG originally it was open loop but would not hold correct mixture so I fitted a Lambda sensor and this now controls the mixture much more accurately.
A work collegue having seen the success of my LPG conv. has decided to bit the bullet and do his Rover P5B.
I got involved on a advice basis only.
when I checked his engine I found that the cam shaft was worn so before any LPG work I "ordered" that he overhaul the top end.
While the top was in bits he fitted a Lambda sensor.
The car runs now a lot sweeter .
The LPG bit has not been done yet but he put a volt meter across the sensor and used that to retune the carbs for petrol. He also used a airflow meter as well.
The cam he fitted is a special for Rover V8 on LPG.
The engine does idle very nice at 650 rpm and is just as smooth as mine.
He is as pleased as punch because this is the best the car has ever run.
Not sure weather is is a unworn cam or a good job done on carbs---- probaly both.
(Message approved by david_gore) |