Ecu upgrade, what to expect ?

[Richard 858]

Dave, here's my latest RR and no real changes since. Please note the hp & torque scales are different.



I'll post the new one when all is done.

[ClassiChimi]

Richard 858 said:

Dave, here's my latest RR and no real changes since. Please note the hp & torque scales are different.



I'll post the new one when all is done.

Serious stuff there Richard, awesome.

[Richard 858]

Alun, YHM.

[Sardonicus]

blitzracing said:

Its all down to mixture control- Ive had some promising results by adding extra fuel at the shunting points to the 14CUX map to smooth it, but the problem is it stops the Lambda cycle, so effectively puts a little more fuel into the catalysts in the process, which then has to be burnt. The potential result is the catalysts could get hotter than normal, but TBH, I dont think the ECU puts in so much fuel at these low speeds to cause an issue, but Im proceeding with caution accordingly. It also wont pass an MOT high idle test as the cycling stopped, not thats this is a major issue as you can easily switch maps between blue and white (for MOT) with a switch. You dont have these issues without catalysts, as you can throw in as much fuel as you like- running around 13.5:1 AFR at low speed makes the engine much smoother than the target 14.7:1. Im not sure how the after market boys deal with the emissions side of things, but Id suspect if you keep the fuel tight at 14.7:1 it wont improve things that much. If you can set the target AFR to run richer with wide band lambda probes on aftermarket, and not cook the catalysts in the process, its probably the best you can do.

Thats spot on Mark I run around the 13's on my brothers 4.0 to get good manners below 2k, my new lairy cammed motor lurches about like a pig below 2k if I don't run it in the high twelves but that was inevitable I was under no illusions with this spec, it's also strange with all that cam and major intake mods inc a blended base without trumpets and general motor config the lurch stays in the same RPM area get over 2k and it's a pussy cat

[ChimpOnGas]

Sardonicus said:

hats spot on Mark I run around the 13's on my brothers 4.0 to get good manners below 2k, my new lairy cammed motor lurches about like a pig below 2k if I don't run it in the high twelves but that was inevitable I was under no illusions with this spec, it's also strange with all that cam and major intake mods inc a blended base without trumpets and general motor config the lurch stays in the same RPM area get over 2k and it's a pussy cat

Not related to shunting at all, but just out of interest what AFR do you idle at Simon?

[Sardonicus]

13.5 is where it's happy at Dave run leaner and the lope just becomes unhappy to be expected of course, I reckon on idle and slow speed there is more exhaust gas in the plenum than the exhaust system

[ClassiChimi]

Sardonicus said:

13.5 is where it's happy at Dave run leaner and the lope just becomes unhappy to be expected of course, I reckon on idle and slow speed there is more exhaust gas in the plenum than the exhaust system

Is this because you have a huge cam with massive overlap on inlet and exhaust valves ?
You've gone as far as is reasonable, is this a bespoke grind for you Simon,,,
Sorry if you've answered this before!

No trumpets that's another one that has me wondering,, big area for the air,

Do you have a spec of your engine and car I can find Simon,

[MPoxon]

Richard 858 said:

Dave, here's my latest RR and no real changes since. Please note the hp & torque scales are different.



I'll post the new one when all is done.

Holy st! Good work!

[davelittlewood]

Richard 858 said:

Dave, here's my latest RR and no real changes since. Please note the hp & torque scales are different.



I'll post the new one when all is done.

So you've already got 430 BHP!!!! Wooooo!

What's my stock 450 going to produce?? About 250 in reality?

[ClassiChimi]

davelittlewood said:

So you've already got 430 BHP!!!! Wooooo!

What's my stock 450 going to produce?? About 250 in reality?

Sounds about right Dave
A healthy standard 450 should be in the region of about 270 but that's supposing it's new !
My engine was re built by Powers,,, feels like it's got good bhp, it's faster than before the re build but that could have been the chip Dom Installed
I'm hoping with some induction mods, new Ecu I'm getting closer to 300 bhp,,, we'll see?

I've just been over on the Griff forum,, usual coil, ignition module, plug lead,, Or is it battery or have I flooded it questions,
Life's to short, the Disi is going

[davelittlewood]

Dom did a full rebuild on mine about 4 years ago as one of the piston liners came loose.

All 8 got top hats, new cam and followers and a vernier timing chain set so maybe I'm getting nearer to the 270??

Strange how you get used to the power though.
When I first bought it I thought I'd never want any more power but now.....

[TV8]

Alun,

Your choice but if I was close to powers, I would be asking them about this for the 450
http://www.powersperformance.co.uk/upgrades/rv8-tu...

Put the MBE on at the same time and job done!

Some days I wished I lived closer to the up grade specialists, others, I am glad that I don't!

[ClassiChimi]

Power corrupts power costs but power's addictive
I'm realistic of what the 4.6 can produce,, you've got to go 5.0 and massive heads to really feel the difference.... And it's a big difference.
Saying all that if my engine holds together and runs well with a new ecu then I'm happy with it, I do love driving country lanes,,,, trundling through little villages so it's not just about the power

[Richard 858]

Before I added the blower kit mine was producing 275hp with the only mods at the time being ACT smooth bore induction hoses & full decat. The motor had pretty much a full rebuild by Dom at Power around 17,000 miles ago under previous ownership.

[ClassiChimi]

TV8 said:

Alun,

Your choice but if I was close to powers, I would be asking them about this for the 450
http://www.powersperformance.co.uk/upgrades/rv8-tu...

Put the MBE on at the same time and job done!

Some days I wished I lived closer to the up grade specialists, others, I am glad that I don't!

Hi Graham, I've seen that very car whilst in production ( so to speak )
I even heard it running once,,, sweet as a nut!

A step to far for me, or is it

When's all said and done I want to do some serious distances in the car,,
I like to keep close to the original concept but I have no issues with turbo'd or any other mod

[ClassiChimi]

Richard 858 said:

Before I added the blower kit mine was producing 275hp with the only mods at the time being ACT smooth bore induction hoses & full decat. The motor had pretty much a full rebuild by Dom at Power around 17,000 miles ago under previous ownership.

So that's the bench mark Richard, other than steel rockers my heads are standard, original liners ( honed )
New 885 cam so not that aggressive but vernier gears also
Skimmed heads and block, but standard induction other than K&N filter and smooth elbow, 280 ish I'd hope?
I have both de cat and standard Y so i have to decide which to run, de cat for power, standard is very nice for cruising for days and days !!! I've already driven from Friday to Sunday all day each day stoppng for fuel only,, it's a tough decision,,, maybe I should get some ear plugs,,,,, for the neighbours

[Richard 858]

Alun, can I give you a call later between 5 & 6 ?

[ClassiChimi]

So at last I made a decision, cars gone into Powers Performance for an MBE ecu upgrade, possibly new riggers,,
And a list as long as my arm
Here's a pic or two of the old girl,,, before I had to say goodbye,,,





I remember buying this car and taking it straight to Dom and being told I'd bought a pupp,,,,
He was right, but I persevered and it's now starting to resemble a sorted car,,, 10K later,,, but boy has it been some fun
And now this should be the icing on the cake,,
It's not been easy,,, I don't have money bags hidden away
It's been excruciating watching my car just sit there while I find the cash,,,
Anyway I hope today is the start of a great Tvr experience going forward with a car I've tried to bomb proof!
We'll see,,, I'm both apprehensive and excited,,,,
My list includes electrics, gear lever bush, tonnes of stuff,,,,
Maybe clutch?
It's all down to the cost so I'm now sitting waiting for Dom to trawl through my huge array of bits and bobs, one door not opening, both windows are iffy,

I do enjoy going to see the lads at Powers,,,, I'm not so sure about the size of the bill yet but when it actually comes down to it, they've always been straight and honest with me so I'm happy with that.
I can't flipping wait but the car will be there awhile so I'll just have to dream about it a bit longer,,

[ChilliWhizz]

ClassiChimi said:

So at last I made a decision, cars gone into Powers Performance for an MBE ecu upgrade, possibly new riggers,,
And a list as long as my arm
Here's a pic or two of the old girl,,, before I had to say goodbye,,,





I remember buying this car and taking it straight to Dom and being told I'd bought a pupp,,,,
He was right, but I persevered and it's now starting to resemble a sorted car,,, 10K later,,, but boy has it been some fun
And now this should be the icing on the cake,,
It's not been easy,,, I don't have money bags hidden away
It's been excruciating watching my car just sit there while I find the cash,,,
Anyway I hope today is the start of a great Tvr experience going forward with a car I've tried to bomb proof!
We'll see,,, I'm both apprehensive and excited,,,,
My list includes electrics, gear lever bush, tonnes of stuff,,,,
Maybe clutch?
It's all down to the cost so I'm now sitting waiting for Dom to trawl through my huge array of bits and bobs, one door not opening, both windows are iffy,

I do enjoy going to see the lads at Powers,,,, I'm not so sure about the size of the bill yet but when it actually comes down to it, they've always been straight and honest with me so I'm happy with that.
I can't flipping wait but the car will be there awhile so I'll just have to dream about it a bit longer,,

Dedication Al, serious dedication.......

[MPoxon]

Good luck with the MBE and other works, I hope the bill it not too eye watering.

Out of interest what have you done to the car so far to make it more 'sorted'.