Set off yesterday, after much debate decided to drive the Saff the 140 odd miles to Blackpool (was going to trailer it) as it hasn't been out of Teesside under it's own power for years, always trailer it to track days now.
The missus followed in the S Max with the kids as we made an overnighter of it as the kids have never experienced the 'delights' of Blackpool (they're 3 & 7).

Cossie made it without a hitch, although the paranoia I experienced on the M6 was ridiculous God knows how many times I checked the oil pressure and temp gauges.

It went over there with an alleged 347bhp from Motoscope, it left MSD today with a confirmed 297bhp and a very firm instruction 'do not drive it over 5000rpm as it's going lean'.
The last set up had apparently wound up the fuel pressure to avoid it leaning off, as a result it was running very rich low down. Also advised to change the fuel pump, the wiring, the injectors for either Siemens blacks or greys (greens not man enough for the T34.48), the ECU for a L8 and the engine wiring loom before making any of the above changes.
The drive home was an exercise in self restraint, trying to stay under 5k rpm was a struggle, but the pull from 3.5k upwards does feel harder than it did. 70> on the motorway is just ridiculous and once on the twisty stuff over the Pennines it got very entertaining.

Lots of work to do before it gets tracked again, can't fault the service from MSD, very thorough report and a good chat to back it up. Spot on.

If anyone is thinking of making a weekend trip over there, can't recommend the Premier Inn in Bispham enough. £60 odd for a spotless family room, decent pub next door and 10 mins walk to the trams.
Kids loved it, and it was proper sunny for 2 days.

 

Not often you find it sunny here I can tell you lol

 

Backs up what ive been saying for years about motorscope! they shouldn't be let loose on cossies!
I told you when you put the t34 on about your greens and my old light blues would have been perfect!

044 pump and rewire kit will get you sorted fuel wise

steve

 

Good old motorscope again.There shit lol.

 

Give me a shout if the 55's are available Ste.

 

Greens are brilliant Mike rainbird says so light blues going in mine as recomended by Tony and Stu for the exact same reasons

 

edited

 

Jay with blues is the fuel economy the same or are they worse compared to the greens.

 

if it is mapped correctly then shouldnt be different at cruise ect but your on a t3 Glenn arnt you ?

 

Was reading that last night, very funny in light of what I'd just
been told at MSD.

 

Yeh i am.I take it the blues will be no good with the T3.

 

unnecessary with your t3 if you already have 803 greens

 

LOL i wouldnt take Rainbirds advice on making tea let alone tuning avice

 

Or well not to worry.

 

I thought Mike knew his stuff ????

 

You Mikeaphobe lol

 

I am confused why do you need 55s if its under 300bhp and how is greens not manly enough?

 

It's under 300 cos the greens won't deliver the fuel at present to cope withe the boost.

This is down to voltage issues around the pump and loom, but even with these corrected the greens are only good for around 330 tops.

 

He knows a bit

im just a bit miffed that hes better looking than me

 

Well I'm sure MSD say their stage 3 chip on greens does 350bhp.
Just re-wire your pump.

 

Hi Paul,
Don't forget that power graph we gave you is at the wheels, not the flywheel.
You can drive it over 5k-rpm, just not with hard boost.

Everyone else:
803s and T34 when the entire installation is brand new, will do the job.
The problem is, so many things affect how much fuel you can get from an injector that its just a setup that actually worsens with time.

Fuel pump wiring
Self explanatory I am sure.. we regularly see this under 11volts nowadays.

Management harness
This gets complex and the obvious sensor issues aside, its ability to switch an injector correctly and accurately for high fuel flow diminishes as it gets older and more resistive.

ECU voltage
This is absolutely critical as it is in charge of opening and closing the injectors, and that requires significant current for the low impedance peak and hold injectors this old technology uses. Its very easy to lose around 6 thousandths of a second through lack of ECU current and degraded injector harness wiring, and that's without the loss of flow you can experience if the fuel pump harness is running the pump voltage low.

That figure I just mentioned may not sound much... 6 THOUSANDTHS of one second? But consider this... an 803 opening long enough to supply enough fuel for 350 bhp is open for about 20ms per injection event. If we were to intentionally only open it for 14ms the engine will run in the high 13:1s and melt a piston.

This is why we err towards bigger injectors on older hardware as the opening times are much lower and we have more margin to correct for the fuelling problem in the map if one exists. We cant run much higher than 20ms effectively on a YB as we are of course limited by the induction stroke time base amongst other things, and the harder we rev it, the less time we have - and thats where bigger injectors come in.

 

Thanks for clarifying Stu.

At the wheels?? Had no idea!

Like I said, it feels a lot more punchy low down, given me a lot of food for thought though. :0)

 

Ah I see now lol sorry for asking

Stu that has summed it up perfect I can actually understand that so thank you for typing that out

 

stu/james ive got a query

i run one of your closed loop chips on t34.55lb etc
and when i put it on rolling road to check fueling etc it was lean high up the range,the fuel pressure was upped a bit to add more and it then went on to make good power(for the spec)
but now after this it no longer idles very well(hunts slightly up and down.
whats your opinion on this please

 

sorry not meaning to hijack thread plynchy

 

Send us a graph of the fuelling/boost against power with the fuel pressure at the correct level, and if you are 100% sure the car is perfectly set up we can adjust the chip for you.

The t34 55s chips are usually conservatively rich enough though, its unlikely they are lean unless there is an issue or spec issue because they run the t34 flat out and there is enough fuel in those maps for this on a t34., its almost impossible for them to be lean if they are correctly set up,

What boost does it run? What T34 variant is it?

 

@Stu

You really have a knack for allowing a dunce like me to understand things.




I miss your articles in FF. Loved reading them!

 

Seconded. Clear and concise as always.

 

t35 turbotechnics.55 housing

28psi peak holding 26 i think james,not driven it since,doing other work on it

there was a slight missfire high up the revs,and looked to be lean hence upping the pressure
il get the graph,why is idle now effected? not enough fuel on tickover?

 

Cylinder pressures can cause misfires, did they narrow the plug gaps?
Need to see a fuelling graph really to see, should do a bit more boost too,

 

Stu / James
I got a stage 1 sapph 4x4 last rolling roaded in 2006 by torque of the devil graph reads 265bhp
Spec is t3 , standard inter cooler,standard dark blue injectors , stage 1 chip, motor sport fuel pump and rewire ,57i k&n cone filter ,

I've just bought brand new803's and 3 bar map sensor (genuine) when do I fit them as I plan to come the 190 miles to get it tuned to stage 3 with one of your chips ?can I fit them before I come up ? And what sort of power would I see ? I also have a over boosting prob that I hope to sort out as I go stage 3

All this is planned in next couple of months

 

It's up to you really, we can post you a chip, or we can fit the kit for you when you come up to us.

 

leave it as it is as it wont run greens on a stg 1 chip,they will sort it out when u get there .would recommend you do the fuel pump wiring to get the most out of your new chip thou!

 

What would cost of chip (l8 ecu ) and tune be ?

 

It's already had updated fuel pump and rewire

 

Set up is £144.00

Chip is £150.00 non closed loop, we can refund the old chip cost if you have an invoice and send it back with the old chip.

 

Top info off Stu there.I wish i knew my stuff like Stu and James.

 

Even if a car only does a few thousand miles a year a yearly check up should be done in my opinion

 

im sure ive got the invoice and chip but im not sure what make the chip is does that matter ?

 

Dont ever be sorry for asking mate, that's the main reason for the forums existence. Had I not asked a lot of questions in my life, I wouldn't have been able to help today either.