Sterling
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twin 40 dellortos. tuning help.
i put a pair of DHLA 40's on a few hours ago, stoked with it, power was amazing, literally TEARING up first gear and following second dry! [:x)]
BUT then after a bit more driving it starts running like a dog.
this was coughing, spluttering, hesitating etc. not misfiring, and not back firing either end.
now my throttle cable is something i have to sort, because if i let the carbs idle at there own stop screw, then im not able to open the throttle fully by the pedal.
ive left the distributer un touched, and the vaccum advance is disconected (and blocked off)
using mechanical pump straight to carbs, no regulator..
did the carbs fully fill up and start overfuelling or something?
all help appreciated! and yes engine ran beautifully with stock carby before hand.
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maxrs
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RE: twin 40 dellortos. tuning help.
2010/07/03 18:06:54
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A regulator will stop the manual pump, over fueling the carbs at idle.
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3sc0rt
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RE: twin 40 dellortos. tuning help.
2010/07/03 18:52:35
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Save up, get a dyno tune & leave it.
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Dave
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RE: twin 40 dellortos. tuning help.
2010/07/03 18:58:15
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good work sterlo.
just check your linkage shafts haven't come loose,as well which will make them run bad,also advance the timming a couple of degrees,no matter what if you want them to run good you will need a dyno tune.
I have run twin carbs 40s and 45s with and without a regulator and it made no differnce to the running of my cars,not that its the correct thing to do but it should run without one.
PS: Hows my 38dgas going????
cheers
Dave
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Juiceman
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RE: twin 40 dellortos. tuning help.
2010/07/03 19:11:19
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I agree with the dyno tune. But if you want to have them running decent for the mean time, PM me your email address and I'll send you a DHLA tuning guide, it's very in depth and also shows you all the components in exploded views and all that.
Cheers.
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Sterling
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RE: twin 40 dellortos. tuning help.
2010/07/03 19:41:22
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quote:
Originally posted by Juiceman
I agree with the dyno tune. But if you want to have them running decent for the mean time, PM me your email address and I'll send you a DHLA tuning guide, it's very in depth and also shows you all the components in exploded views and all that.
Cheers.
email sent! quote:
Originally posted by Dave
good work sterlo.
just check your linkage shafts haven't come loose,as well which will make them run bad,also advance the timming a couple of degrees,no matter what if you want them to run good you will need a dyno tune.
I have run twin carbs 40s and 45s with and without a regulator and it made no differnce to the running of my cars,not that its the correct thing to do but it should run without one.
PS: Hows my 38dgas going????
cheers
Dave
you and another forum member are chasing it. do you still have the anti dive kit?
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Sterling
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RE: twin 40 dellortos. tuning help.
2010/08/03 22:25:16
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well ive gotten the carbs to act a little nicer to me, i managed to get it running again, after cleaning the plugs with GP thinners, let it idle literally for a good 5 minutes, took it for a drive, stomped it, and WOW theres that power again! doesnt like harsh driving, need to take it tamely between each "open her up" session, otherwise the "choking" or "hesitating" begins again. atleast i will be able to drive it to a dyno place now.
the only problem still is that its an absoloute b*tch to start!, i set up a dodgy cable to use for the chokes, but it does do the job, and it still wont start. i have to be really patient for it to start, and this involves throttle work and jumper leads connected to mums discovery.
any ideas? or am i stuck with this until i get a professional tune?
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Juiceman
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RE: twin 40 dellortos. tuning help.
2010/09/03 07:24:39
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Mine would always take a while to start, but that was also because of the high compression. Do you have an electric fuel pump? I suggest you get one, that way you won't need to bother with chokes, I never had to use the choke, even after 17 months off the road!
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Dave
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RE: twin 40 dellortos. tuning help.
2010/09/03 19:30:24
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! quote:
Originally posted by Dave
good work sterlo.
PS: Hows my 38dgas going????
cheers
Dave
you and another forum member are chasing it. do you still have the anti dive kit? sterlo, its me JIMMY AKA DAVE no sold the anti dive kit I thought we made a deal(via email) and we even decided on a price on it,you were getting rego then your were going to send it to me???? what are you trying to do to me??? I can send you the emails if you want. cheers Dave
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Sterling
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RE: twin 40 dellortos. tuning help.
2010/09/03 20:05:49
(permalink)
quote:
Originally posted by Dave
!
quote:
Originally posted by Dave
good work sterlo.
PS: Hows my 38dgas going????
cheers
Dave
you and another forum member are chasing it. do you still have the anti dive kit?
sterlo, its me JIMMY AKA DAVE no sold the anti dive kit I thought we made a deal(via email) and we even decided on a price on it,you were getting rego then your were going to send it to me???? what are you trying to do to me??? I can send you the emails if you want. cheers Dave email sent.
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Sterling
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RE: twin 40 dellortos. tuning help.
2010/05/14 23:11:20
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well the carbs self fixed, and ran well for a while. but before i knew it they would be overfueling in the mornings trying to start. and ran like a dog in general, still driveable, but yeah.
ive ripped them back off, put the standard carby back on, and upon removal i saw that there are TWO large screws on the rear ward side of each carby, on the rear carby it appears the screws have fallen out! could this have been causing the poor running?
i couldnt find any clear pictures to double check if they were on before hand.
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