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 189 Posts Member #: 1774 Advanced Member Sydney AUS |
24th Jun, 2008 at 01:23:48pm
ok, more info... when its a REALLY cold day (like today) the 'sligshot' effect is much worse... first thing Sat morning, cut slots in the tamper proof screws, dump the oil from dashpot and put in some heavier stuff... see how she likes that.
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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 1060 Posts Member #: 588 Post Whore Delaware, USA |
24th Jun, 2008 at 06:04:54pm
Unlikely.... but maybe its too rich because on a cold day the oil is thicker.... so also try thinner oil???
Edited by Turbo Tel on 24th Jun, 2008. website:- http://www.terryhunt.co.uk
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
25th Jun, 2008 at 06:06:02am
Its got sewing machine oil in there... pretty thin I think.
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
25th Jun, 2008 at 06:26:58am
Oh, one other thing, if the oil is thicker on a cold day, that should actually help my case, if the theory is right, the piston is lifting too quickly in the SU therefore leaning out... since adding the sewing machine oil (about a week ago) it got better initially but has slowly gotten worse now... unless the oil is crap and has already lost its attributes.
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
26th Jun, 2008 at 01:27:09am
Ok, ran the Lambda sensor on her
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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1060 Posts Member #: 588 Post Whore Delaware, USA |
26th Jun, 2008 at 08:26:26pm
On 26th Jun, 2008 pristic said:
When cruising (part throttle) then floor it, spikes up to 18 possibly more Theres the "lag".. its leaning out (dangerously!) you need to use thicker oil, maybe get the advance to come on a little quicker or most likely get the needle reprofiled... On mine that was stations 6-7 that needed to be polished down to cure that.. But I now think I went too far!! Out of interest What happens if you are cruising at 3000 in 3rd and squeeze the throttle just enough to get full boost but nowhere near WOT?? Mine was a pig at that area as well, it leaned out to shit even though WOT was fine.. website:- http://www.terryhunt.co.uk
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
26th Jun, 2008 at 08:41:53pm
whoooaaaaaa!!!! 18 is danger area for any engine, least of all a turbo!
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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1060 Posts Member #: 588 Post Whore Delaware, USA |
26th Jun, 2008 at 08:47:13pm
On 26th Jun, 2008 TurboDave said:
whoooaaaaaa!!!! 18 is danger area for any engine, least of all a turbo! Tell - did you end up with the balance pipe pluged or functioning as SU intended? Yes, I never found any difference either way once the needle was set so I left it in place. I felt it helped keep the cruise mixture a little more under control. I did however end up with a 12oz spring and after living with the current needle for a while I have decided I went OTT with the richness at stations 6-7 (to fix the exact problem above) so I am planning to have another go.. Actually see my other post as I just got back from the dyno.. website:- http://www.terryhunt.co.uk
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
27th Jun, 2008 at 03:40:57am
On 26th Jun, 2008 TurboDave said:
whoooaaaaaa!!!! 18 is danger area for any engine, least of all a turbo! Tell - did you end up with the balance pipe pluged or functioning as SU intended? I have not clamped the lean out pipe yet. Will be doing all the 'tests' tomorrow AM. Definately dont want it leaning out that much though. Ill put in thicker oil AND change the spring I think... to a stronger one. Dizzy timing is being a real shit... so I just ordered the Megajolt V4 I retarded the timing (like 1mm) on the dizzy and it overheats, put it back to where it was, and doesnt overheat but gets really growly... and more so getting onto boost (like its got too much advance) Timing obviously didnt affect the A/F at all... same thing with the A/F just pulls different with timing changed. Without a doubt, tomorrow morning ill pull off the dashpot, and replace oil and spring... then put up more A/F readings... and results of how its going. Ive seen the A/F drop to about 11 or 12 minimum (so richening up) but not sure in what situation (cant recreate it) i might actually just clamp the lean out pipe today and see how the readings change... but still isnt 'fixing' the prob right? Pete 1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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1060 Posts Member #: 588 Post Whore Delaware, USA |
27th Jun, 2008 at 05:23:44am
Clamping the leanoff pipe will make it richer but maybe too rich on some points of drive, only way to find out is to try it.. At least with an O2 sensor its easy to see the result..
Edited by Turbo Tel on 27th Jun, 2008. website:- http://www.terryhunt.co.uk
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
27th Jun, 2008 at 10:57:02am
Ok, clamped it, doesnt get too rich really, seen it dip to 11 only once and cant recreate it... much better now, still leans out when I nail it, but not as bad now... so tomorrow will sort dashpot oil with thicker stuff and check spring...
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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1641 Posts Member #: 178 Post Whore stowmaket suffolk |
27th Jun, 2008 at 07:56:42pm
the main points are cruising , which seem about right and flat out under boost.
always looking for them bigger bunches of bannanas |
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1060 Posts Member #: 588 Post Whore Delaware, USA |
28th Jun, 2008 at 12:46:58am
On 27th Jun, 2008 pristic said:
Ok, clamped it, doesnt get too rich really, seen it dip to 11 only once and cant recreate it... much better now, still leans out when I nail it, but not as bad now... so tomorrow will sort dashpot oil with thicker stuff and check spring... By the way, when I am cruising say at 60 and back right off (so its revving say around 3500 and slowing down slowly (approaching lights, traffic, etc) the a/f leans out too . Is that right? Also, on idle, the a/f slowly creeps up, up to about 15-16 give it a touch of gas and it comes back down to 12ish cruises around 12.8-13.5 now with lean off pipe clamped Peter Peter Sounds great, Though I would chase up that leanoff at idle, it should be pretty steady... could there be a vacuum leak? High AF on overrun is Ok no load so no damage.. website:- http://www.terryhunt.co.uk
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
30th Jun, 2008 at 12:35:14am
Ok, intake manifold has a slight leak, will pull it off and seal to the gasket and head. Otherwise, running like a dream.
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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189 Posts Member #: 1774 Advanced Member Sydney AUS |
30th Jun, 2008 at 07:29:48am
Rolling road tune booked in for next Friday. Will sort the needle then, even the thicker oil is just masking the problem I reckon...
1132cc Turbo ~120 bananas ATW - Fun Fun Fun
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