I've a bit of a dilemma
Running a td05 on my bug , the mileage is now over 140k
It still pulls well and no worrying knocks ( yet )
I currently have it boosting too 19psi @ 4500 then dropping to 12 to redline
Which suits me really and doesn't stress it too much
But I'm considering holding it to around the 5500/6000 range
But am I pushing it for an old motor and is it worth it for the gain

Opinions and advice chaps

 

id say at your own risk i boost mine to 6000 or little more, and its got 87 k on clock, but well u never know. i was going to ask for rev limiter at mapping to 6000 max. not just engine, could be gearbox. mab change oil and filter more reg check timing belt is changed at correct intervals, and dont think pushing it now and then would present a problem, now and again that is. plus if u know of any history of the engine having work id be even more careful. how longs a piece of string..................£££££££

 

Personal choice tone, to be honest 12psi isnt really that high as you know, Shouldnt really have an issue raising it to around the 1bar/15psi region i wouldnt have thought.

 

My bug has a tdo5 on it @ 106k and it holds boost to the redline mate (1.5bar tailing to 1.35bar)iirc.
It's only mapped on 95 ron (daily driver) and its fine, might have a few dyno graphs if you want a look

 

I'm not good with bar ,all my stuff is psi , in 4th it's peaking at 1.4 and dropping to around 1 at 6k ish
So I think I'm gonna run with this for time being chaps

 

Its quite simple chap.
Try it on 12 redline, up it to 14 psi, then in 0.5 psi increments up to a max of around 17, see how it goes.

 

Get some more boost rammed through it

The tdo5 is a sturdy unit that likes a bit of boost, My classic was 352bhp/340lbft on 1.4bar and was fine even with my lead boot

 

I had a quick dabble yesterday but it seems to lose a lot of control
And becomes a little random , where as now it pulls smoothly right through
Coupled with my box is not at its best I'm gonna run what it's at
Or at least until I have more time and maybe try a three port as well

 

What boost solenoid was you running

 

3port mate, every time i get a car mapped i pop one on for the sake of £20 it's a no brainer as it gives the mapper greater control (as you know)

 

I've read that a steady progression of your Wgdc you can achieve steadier boost but you get slower onset
But when you look at some maps it's whacked to say 70% pretty much across the board
I'm taking it you can only really do that if your either running lower boost or have good boost control via other means

 

Was thinking that , only some folks seem to be running similar boost without ?
Same as you say it's not worth messing about for the cost

 

If you get one give me a shout and i will send you a wiring diagram over for it

 

Cool , are you not going clinic on the 12th

 

Just checked fleabay for one. , no go
Anyone got a 3 port please

 

It's a bad day that mate, it's my sons birthday and i need to set the pub up for his party ect, I might get chance to pop down first thing for an hour or so if im lucky,
shame really as i wanted to watch your car implode
only joking

 

I think i have a few left, i know i gave one to boozeydave so there should be at least another in my pile of bits, ill have a look in the morn for you

 

Nah I'm only running girls boost , I'll be safe I'm sure

 

Nice one

 

We do brand new Pierburg ones complete with either a just the mating connector or a 1.8m cable. It's the same as the Prodrive 3-port, only cheaper

Look on our website here

 

Throw up a quick screen grab of your max wastegate duty.

 

Here you go as requested, the boost is a tad lower than i remembered.
ps 95 ron fuel and mapper said there was approx 3.5 degrees of timing to go in if it was on v power so it will see 350bhp if wanted.

 

Cheers addi , yeah I get the feeling mines around the same maybe a little higher peak although my boosts dropping off more

 

Are you on v power ? if so there will be a lot more in yours mate, mines on 95ron due to 99ron being a fecking pain to find up here for a daily drive.

 

Yeah v power and meth , it's not getting the boost its more holding / control
+ do I really need much more , what are the gains holding it to redline
Btw what gear were those runs

 

3rd gear mate, more boost = more power to an extent.

 

selling 3 port on here. See linky
https://www.scoobynet.com/showthread.php?p=10927155#post10927155

I've brought one, good service

 

I run mine very high peaking around 95% dropping to 80 then stepping up a tad to 85% again from 6k on just to help keep requested boost possible.
I havent tried dropping it too much yet but boost comes in pretty well and not at all abrupt.

 

20psi mid range tapering to 17psi at 6500rpm shouldn't be an issue for a tdo5 16g, but you might need a different fuel strategy to what you're currently targeting at lower boost at upper rpm, and of course the timing will need to be adjusted to suit. I personally ensure fuelling is where I want it before doing anything with ign, and afr can move a little after adjusting the timing.

You should still be able to get reasonable control with your 2 port. I think you use OS MAFless? which I don't have any experience with, but I'd be suprised if you cannot log/monitor what the closed loop WG control is doing. From this, as a rough guide, I would monitor 4th gear (maybe 5th if 6 speed) and set your base WG map at 2-3 %below what was required to maintain your desired boost. WG duty will usually increase with rpm if you're aiming to hold that amount of boost into high rpm. Having duty high intially to aid spool up can do some interesting things to transient VE when the WG opens as you approach target boost that might need mapping around (if running MAFless/speed density).

My disclaimer is that I'm an enthusiast and not a professional mapper, so talking only from my limited experience, hence be careful following my advice

Simon

 

I've been most of my runs in 3rd and logging those ,
Peaking at 18.5 dropping too 11 at 6500
Tbh I haven't logged boost in 4th , but from my gauge and revs it's peaking around 21 and dropping off to around 14/16 after 5k ,( not that accurate using visual not logging ) It pulls through smooth and is more stable in 4th
Another issue is I don't really have a nice flat stretch to test , which I guess isn't gonna help
I'm generally happy to run as it is , and pretty sure I can make it hold more , but what will my gains be vs strain on the car
Is it worth pushing that little bit more on an old motor
What is considered pushing the boost limits on an old car