Rolling road results

[paul gotts]

Here's the graph from Saturday's session at the Surrey Rolling Road - corrected flywheel figures. The first run which gave 304 BHP max. was deemed inaccurate because, if I understood Charlie correctly, his air temp. sensor placed alongside the air filter in the engine bay was picking up too much heat. A re-positioned fan cured that. The sudden drop-off is the rev limiter cutting in, which IIRC, I set at 6100 rpm.

Paul.

[FrenchTVR]

Well done Paul, good blat up there as well

I've just spoken to a couple of people and have booked it in to get a Mark Adams modified ECU fitted to try and cure the fueling hole in mine.

[paul gotts]

FrenchTVR said:

Well done Paul, good blat up there as well I've just spoken to a couple of people and have booked it in to get a Mark Adams modified ECU fitted to try and cure the fueling hole in mine.

Yeh, really enjoyed it. You getting MA to do the biz at Austec?

[FrenchTVR]

paul gotts said:

You getting MA to do the biz at Austec?

I am indeed, I spoke to a couple of people about the ways to go and this seemed the most practical given the time and budget constraints. Still quite expensive but it should sort it properly in one go.

[HarryW]

Excellent result there, I do love the feline free 4.3 lump .
Out of interest do you have the wheel figures to hand.

Harry

[redcar]

FrenchTVR said:

paul gotts said: You getting MA to do the biz at Austec? I am indeed, I spoke to a couple of people about the ways to go and this seemed the most practical given the time and budget constraints. Still quite expensive but it should sort it properly in one go.

Mick.
It was Mark and Austec that did all the tuning on mine and as you know it came out good. Well worth it, the injectors were the biggest gain though.
Martin

[paul gotts]

HarryW said:

Excellent result there, I do love the feline free 4.3 lump . Out of interest do you have the wheel figures to hand. Harry

Harry: 234.6 @ c. 5300rpm, which tallies quite well with the last 2 sessions at my usual rolling road of 244 and 241. But as most people say, its not really the peak BHP figure that counts, but how high & wide the torque spread is.

Paul.

[chunder]

Good figures Paul - I imagine translates into a pretty quick car !

FrenchTVR said:

Well done Paul, good blat up there as well I've just spoken to a couple of people and have booked it in to get a Mark Adams modified ECU fitted to try and cure the fueling hole in mine.

I have fuelling issues also - AFM adjustment can only provide correct full throttle or correct low rpm / cruise fuelling. After looking at various aftermarket systems - and I know Paul has an improved set up - it seems the Megasquirt ECU is a good cost effective solution.

Can be used with a distributorless ignition system to provide full ignition control as well together with outputs for idle air control via a stepper motor or fast idle solenoid and cooling fan control. Also provides datalogging functions and if you weld in a fitting for a wideband oxygen sensor gives closed loop fuelling control.

Got to be worth it at 170 quid for an ECU with a base RV8 set up and you can even get an adaptor so it plugs into the original ECU multi connector using existing relays and sensors. Uses a MAP sensor and TPS for enrichment values which means ditch the AFM altogether.

Ok so you may need a RR session to get the best set up but download the free software and use the oxygen sensor and it should be possible to get a good set up yourself.

Got to be a viable option instead of the MA and RR route which isn't possible down under anyway.

Am taking this route myself over the next few months so would be interested to here from anyone with experience of Megasquirt and I will let everyone iknow how it goes.

[paul gotts]

chunder said:

Good figures Paul - I imagine translates into a pretty quick car !

Blow own trumpet mode on: I came joint 5th. out of 39 cars in the acceleration test at Zolder last year, in the over 4 litre class, so quite happy, although you always want more!

chunder said:

I have fuelling issues also - AFM adjustment can only provide correct full throttle or correct low rpm / cruise fuelling.

Exactly the reason I junked the flapper for Motec.

chunder said:

Got to be worth it at 170 quid for an ECU with a base RV8 set up and you can even get an adaptor so it plugs into the original ECU multi connector using existing relays and sensors.

Sounds incredibly cheap - thats just to control fuelling? Presumably you'd have to add the cost of air temp. and MAP sensors?

[FrenchTVR]

That looks very tempting I have to say! Uses the original loom, injectors etc with a fully programmable ECU and no AFM.
I'm tempted. Has anyone on here got experience of this system?

[gsx600]

It's also the megasquirt system I'm looking into, have one made up and ready to go but not had time or patience recently

My main issue is doing the wiring again to the sensors, as I've not seen an adaptor that you can use for Rover V8 - tell us more or a source.

The rest seems fairly simple, all you need is to weld a wide band O2 sensor into the exhaust and then you in theory have a fully mappable fuel ecu.

Next step would then to be sort out the spark side, using megaspark or some such.

Brother is running a few dragsters with megasquirt with some good success and has a rolling road so I must just be being lazy !

[2 sheds]

Nice one Paul , very impressive , brings back sweet memories
Tim

[chunder]

paul gotts said:

Sounds incredibly cheap - thats just to control fuelling? Presumably you'd have to add the cost of air temp. and MAP sensors?

The MAP sensor is mounted in the ECU with a barbed hose connector on the casing - there are software maps available for all common temp sensor / resistance ranges so you don't need to change any.

Price is through a chap I have been put into contact with in the UK and is for the ECU with a basic get you going set up. The ECU is capable of controlling ignition but you would need the EDIS-8 controller and coil packs (available on ebay for 25 quid) and the crank trigger wheel and sensor (again 20 odd).

All software is free and downloadable from the net - any search on Megasquirt should yeild results.

[chunder]

gsx600 said:

My main issue is doing the wiring again to the sensors, as I've not seen an adaptor that you can use for Rover V8 - tell us more or a source.

By getting a DB37 male connector and then whatever female connector is required to fit the existing ECU jack as long as you can identify which pin is what connection you can wire up an adaptor.

I will ask the contact I have whether he minds me forwarding his details - he is in the process of making his first Lucas ECU adaptor so it's early days.

The O2 sensor is just an option for closed loop fuelling control - not a neccessity as long as you are prepared to manually set VE values.

[gsx600]

Keep us informed on adaptor,

Surely the way to go would be a closed loop system as then you can adjust real time on the fly to get the optimum and not need a RR all the time ?

[chunder]

gsx600 said:

Keep us informed on adaptor, Surely the way to go would be a closed loop system as then you can adjust real time on the fly to get the optimum and not need a RR all the time ?

Exactly - in fact you shouldn't ever need to adjust as the ECU will always try to keep whatever air / fuel ratios you have set up for the given rev bands.

Obviously an initial RR setup would perhaps be best but they can only tune for max power or torque, you can adjust fuelling and timing on the fly for driveability and response etc to your hearts content.

To be honest and without wishing to offend certain people (who have the right to reply and may wish to contribute or even put me straight as I am not an expert) why anyone would consider remapping the Lucas ECU is beyond me.

Specialist's time plus a RR must be 400 minimum - only to go back and spend the same again next time you change / upgrade something else.

Motec / Haltech system big improvement but 1000 minimum.

Megasquirt 170 - 300 depending on whether ignition and /or O2 feedback plus possibly some RR time - no contest really.