simon k wrote:
I can never see the timing marks properly
Step 1. Liquid paper the timing marks on the flywheel so they can be seen
Step 2. Time engine
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| need a little help with timing and heat https://www.ausmini.com/forums/viewtopic.php?f=2&t=52216 |
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| Author: | EAB [ Thu Apr 16, 2009 8:08 pm ] |
| Post subject: | need a little help with timing and heat |
ok so i've just chucked on a 1.75" carby with a TW needle and set the mixture at around 1000 rpm, also have a KU needle staticly set the timimng to -3 with my new dizzy but the car is well it pops all the way up the rev range in every gear and seems to lack power past about 3000 rpm, 4th gear hardly pulls at all but will maintain speed. there just little pops that seems to match with each cylinder. the car is runnign along at 110 degrees (remains steady), which i think is more to do with the temp guage but it still feels hotter than it should on the radiator the oil pipe that goes to the filter is also hot, im running 15-30 oil i think this is the cause ( should i change it to 20-50) as i've just resarted the engine and wanted to run some thinner stuf through it to get rid off the crap oil from before the new dizzy has a stiffer curve than most as its prepped for a weber carby so i'm wondering if that is causing it to pop? or is it just because i have no sound deadening that i can actually hear this? i've still got the other dizzy and a hs4 carby with an AN needle should i go back to that? car specs are 1310cc extractors mildly worked head 1.5 rockers any help much appreciated |
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| Author: | 850man [ Thu Apr 16, 2009 11:42 pm ] |
| Post subject: | |
-3??? Mini timing should be set at idle anywear between +6 to +12 advance depending on what distributor you have and should advance up to around 28. no more than 30 tho or you'll melt pistons. -3 means it retarded, will go slow, wont rev and get hot. |
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| Author: | BALLISTIC [ Fri Apr 17, 2009 8:33 am ] |
| Post subject: | |
Incorrect timing and lean mixture will cause overheating. As 850man said reset the timing, then see if it still pops under accelleration if so check the dash pot fluid and make sure there is plenty in there, if it still pops and farts around your needle and or mixture is to lean. Is the carb a HS6 or HIF44? Is the maniflod a water heated type? |
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| Author: | EAB [ Fri Apr 17, 2009 4:03 pm ] |
| Post subject: | |
ok timimng is set, dashpot is full, stillpopping under acceleration sometimes backfiring after i richened it up a bit more. carb is HI44 manifold isn't water heated runnig premium and valve saver im so annoyed i've spent my entire holidays trying to get this thing going again, finally have and it just wont run! |
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| Author: | simon k [ Fri Apr 17, 2009 4:13 pm ] |
| Post subject: | |
EAB wrote: ok timimng is set
how did you set the timing? take us through the steps I'm slightly embarassed to admit that even though I have a timing light, understand the theory and have seen it done successfully many times, I can never see the timing marks properly, or just have trouble with it. So I've always timed my engines by turning the dizzy clockwise (advance) until it runs rough, turn it back till it reaches peak revs, then back a little bit further, then I drive up a hill a few times and listen for pinging - last couple of times I did that, I got my guru to check it with his timing light and it was spot on - works, but not exactly scientific |
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| Author: | EAB [ Fri Apr 17, 2009 4:20 pm ] |
| Post subject: | |
step by step take out spark plugs, put car in fourth hold mirror to gap in flywheel housing and watch for timimng marks, set to TDC rotate dizzy back till points close rotate forward till they just open number one goes to opposite of rotor button fire it up, doesn't fire swap number one lead to opposite side etc fire it up all good, fine tuning i start it up at 1000 rpm then turn the dizzy back till its starts to get a little rough (only turn it about 5 degrees if it doesnt get rough), then forward till it just smooths out again. take it for a spin to make sure of top end i've done this with two different dizzies and it still has the same problem |
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| Author: | simon k [ Fri Apr 17, 2009 4:26 pm ] |
| Post subject: | |
go the other way - turn it clockwise until it races, then turn it anti clockwise a little EAB wrote: fine tuning i start it up at 1000 rpm then turn the dizzy back till its starts to get a little rough (only turn it about 5 degrees if it doesnt get rough), then forward till it just smooths out again.
doing it your way, the point where it "just smooths out again" is still too retarded |
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| Author: | sgc [ Fri Apr 17, 2009 4:30 pm ] |
| Post subject: | |
simon k wrote: I can never see the timing marks properly
Step 1. Liquid paper the timing marks on the flywheel so they can be seen
Step 2. Time engine
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| Author: | drmini in aust [ Fri Apr 17, 2009 4:43 pm ] |
| Post subject: | |
sgc wrote: simon k wrote: I can never see the timing marks properly Step 1. Liquid paper the timing marks on the flywheel so they can be seen Step 2. Time engine Meh... 1. Put a TDC mark on the crank balancer and timing cover, where you can SEE the bastard.. 2. Buy a dial-back timing light.
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| Author: | simon k [ Fri Apr 17, 2009 4:54 pm ] |
| Post subject: | |
drmini in aust wrote: 1. Put a TDC mark on the crank balancer and timing cover, where you can SEE the bastard..
I did that a couple of years ago - still a pain solve the EAB's problems, not mine - I'm beyond help |
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| Author: | EAB [ Fri Apr 17, 2009 5:27 pm ] |
| Post subject: | |
thanks for the help guys, i've run out of time to do stuff to the mini now. have to go back to uni in melb and ittle be at least 6 weeks before i get another chance, i'll let you know how it turns out. |
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