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by GDCobra
Mon Sep 19, 2022 2:54 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

If you look more into the diagnostics side and fault finding. Pressure waveforms are used for many things, and quite common is a pulse sensor for detecting problems. Whether that's in the crankcase, exhaust or intake. The pulse sensor doesn't so much detect pressure, as pressure changes. So it sees...
by GDCobra
Sun Sep 18, 2022 4:31 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

scudderfish wrote:
Sun Sep 18, 2022 2:07 pm
Can you add a TPS reading as well?
I'm thinking of that. I think If I tap into the TPS and make sure that my system and the bikes systems are both grounded at the same point it should be able to use this sensor. Hoping to have that in a future revision.
by GDCobra
Sun Sep 18, 2022 4:29 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

For most part you only really need to balance at idle, simply because that is where any imbalance will have the most effect, especially in terms of a stable idle and emissions etc. But good to see that both cylinders are at least very very close to each other. At slight imbalance at say 50% or 100%...
by GDCobra
Sun Sep 18, 2022 1:45 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

Another update on this. I have 2 MAP sensors working not (it's only a 2 cylinder bike) and this is the readings I'm getting. https://i.imgur.com/kcWBEeo.jpg This is similar to previous graphic but now shows readings from both cylinders, for some reason not as smooth as original readings but should s...
by GDCobra
Sat Sep 10, 2022 2:58 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

I mentioned filtering in my previous post, thought I'd just show what I did. This graphic shows both the filtered and unfiltered signal without any filtering applied. https://i.imgur.com/M3Imc9m.jpg They are the same apart from the offset I've applied so that both signals can be viewed. This is with...
by GDCobra
Sat Sep 10, 2022 2:52 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

Thought I'd update this as I've got a little further with the project. Maybe my findings will help others. Unfortunatly I've not sorted out any MAP sensors yet so can't currently monitor multiple channels but thought it best to do a bit of fact finding to see how plausible this may be. I realised i ...
by GDCobra
Fri Sep 02, 2022 10:54 am
Forum: Engines Area
Topic: poor piston to valve clearance cures
Replies: 8
Views: 1646

Re: poor piston to valve clearance cures

If your engine already has 10.5:1 CR pistons not doing this will result in CR being too high (a concept I couldn't get over to the guys at RPi when I first got involved with this several year ago and hence had no further dealings with them). But isn't more always better :lol: I generally tend to us...
by GDCobra
Mon Aug 29, 2022 7:11 pm
Forum: Engines Area
Topic: poor piston to valve clearance cures
Replies: 8
Views: 1646

Re: poor piston to valve clearance cures

thanks everyone for your suggestions so after reading the replies i double checked the cam timming agains the old cam and sproket and found about 90 degrees out took cam sproket off and found a timming mark on the other side (sprocket does not indicate front on it) the side that i had on the outsid...
by GDCobra
Fri Aug 26, 2022 4:49 pm
Forum: Engines Area
Topic: poor piston to valve clearance cures
Replies: 8
Views: 1646

Re: poor piston to valve clearance cures

I have started to rebuild my rover 3500 engine have had the block machined flat as well as the heads machined flat heads are from a different engine but block and pistons are original my problem is that i have checked the hydaulic lifter preload and shimmed the rocker towers by 0.020" but when turn...
by GDCobra
Sat Jul 23, 2022 12:44 pm
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: Engine stumbles powering thru corners
Replies: 19
Views: 15810

Re: Engine stumbles powering thru corners

Disclaimer - I haven't dealt with carb's for some time so may be talking total garbage but just thought I'd try to clarify something. I've read and re-read the original post and it seems that you are getting one bank rich and the other lean for a given corner direction and these reverse when corner...
by GDCobra
Sun Jul 10, 2022 10:36 am
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: Adding Lambda probes to Lucas 14CUX on non-cat car
Replies: 4
Views: 1399

Re: Adding Lambda probes to Lucas 14CUX on non-cat car

Are you going to proceed with the modification? Presumably you will be fitting 2 of these sensors?
Seems like a significant amount of work and expense, would it not be cheaper/easier to simply fit the OEM sensors for a 14CUX equipped vehicle?
by GDCobra
Sun Jul 10, 2022 10:33 am
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: SU carbs and CO2
Replies: 8
Views: 2246

Re: SU carbs and CO2

Although a car of this age could possibly claim MoT free status it is not an automated processs, it depends on the owner applying for it, I know of a few in the kitcar world who have done this successfully even though there is no way they could legitimately claim that they are not extensively modifi...
by GDCobra
Wed Jun 29, 2022 10:30 am
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: Adding Lambda probes to Lucas 14CUX on non-cat car
Replies: 4
Views: 1399

Re: Adding Lambda probes to Lucas 14CUX on non-cat car

Hi, François Although a fully closed loop, lambda equipped system may offer some advantages I'm not sure that will be the case with the 14CUX. The reason for this is that this system only uses narrowband sensors so can only monitor stoichiometric values so has limited capability. Arguably the trim v...
by GDCobra
Mon Jun 27, 2022 11:41 am
Forum: Engines Area
Topic: Oil flow
Replies: 3
Views: 659

Re: Oil flow

I seem to recall it is just out of one of them (can't remember which) and the head only has holes in both ends as it's a common part for both sides of engine.
by GDCobra
Mon Jun 20, 2022 2:04 pm
Forum: Electrical & Ignition Area
Topic: MAP sensors, anybody know a component number?
Replies: 27
Views: 5857

Re: MAP sensors, anybody know a component number?

The other sensor looks like it would be useful for something different I thought up some time ago which is a fuel pressure sensor which measures fuel pressure relative to manifold pressure which should be a constant figure. My ecu does this as standard. Relative FP is ideal for fuel pressure safety...

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