Outer Limits 4x4 Board

You can use a simple pneumatic bleed valve on the map sensor to increase boost pressure.

Unless the chip you use has a boost control function, it is a very good idea to manually lift the boost 2-4psi to help burn the extra fuel your putting in.

Not asking you to sacrifice anything.
What you should have posted earlier was " no I don't have actual figures".
Don't know that I am cynical, but I do take what you say with a grain of salt.

You should take the same approach with all the other guys claims that refuse to put up any kind of ...

KiwiBacon wrote:Their tyres are surprisingly good value.

I was thinking the exact same thing

A more interesting fact based read on fuelers and their mind bending numbers.
http://www.motortrend.com/features/112_ ... ewall.html" onclick="window.open(this.href);return false;

More so compund turbos or toy with the idea of supercharger and turbo setup to have boost at all rpm

superchargers are nowhere near as good as people think. The only reason they get any decent boost out of them for drag racing is because they are pouring methanol through them and the rules say ...

There is .2 afr difference before and after a cat converter in most cases. After cat will read .2 richer than before.
Its important to remember that because the O2 reading has changed, doesnt mean the mixture actually changes.
Still X amount of air and fuel being burnt by the engine, but chemical ...

Jimbo wrote:Thanks, I have it around 14.5 for light to mid acceleration and it seems fine. Not much tuning ability with this impco 200 mixer!

14.5 is ok, marginally rich but wont cause any problems.
You will notice an economy saving backing that off to mid 15's though.

Northside said"
What data do you want? Just AFR before and after a manifold change?

It is a simple request and Im always happy to put info up for anyone who asks."

And my reply was no actual etc etc.

Sorry guys I was pisseed the other night and may have come across a bit too strong.
I may have ...

Full Race Fabrications
(07) 5497 4611

Ask for James. Builds some of the best race cars in Australia, quality of workmanship is second to none.

I send alot of people your way when they ask about pumps Swaffie, We may not agree on anything on the forums but ive never disputed the fact you know how to build pumps well.
I also mention Matt to customers that are chasing something between a 2860 and 3071 setup that I have not been able to cater ...

I have been playing around with the LPG on my GQ trying to get the mixtures a little more stable (using a wideband).

LPG stoich is around 15.7:1 but the gq can cruise at 16.5 and higher no problem. Does anyone have data on what happens to the EGT's as you start to lean it off.

Also what should i ...

I think you will over capitalize by making them from scratch when the market doesn't need it nor will it support the costs of making or developing one !

An hours labour milling it off max , some plate and a good tig welder an your done!

If your looking at it for a business venture I would put my ...

Definitely a cam timing problem.

Dam Would be good to log intake temps on each cylinder on standard manifold. Not exhaust temp of cylinders. Old mavs testing was done 22yrs ago with not so desirable equipment.

Wats the new manifold look like?

I cant see the inlet temps being very different to be honest.
End cylinders may be ...

tye1986 wrote:Hehehe how'd we get onto 2.5 crds exhaust.


Trying to change the subject

Just proving a point. Im used to getting raged at for going against the grain.

Would be good to log intake temps on each cylinder on standard manifold. Not exhaust temp of cylinders. Old mavs testing was done 22yrs ago with not so desirable equipment.

Wats the new manifold look like?

I cant see the inlet temps being very different to be honest.
End cylinders may be ...

What is guessing about it? Just because I take data and do the math's on how something performs doesnt mean its a guess...

If you fit a manifold and it leans the AFR off, the EGT will be lower. Its a simple scientific fact.
If you have seen any flow bench data on a standard manifold you will know ...

What else would people like tested?

What about pressures and temps on the inlet sde of things ????
Maybe actual flow figures for individual cylinders ????

Well temps are highly dependant on turbo and intercooler setup, I can give before and after on the setup I build, but it wont be anything ...

What is guessing about it? Just because I take data and do the math's on how something performs doesnt mean its a guess...

If you fit a manifold and it leans the AFR off, the EGT will be lower. Its a simple scientific fact.
If you have seen any flow bench data on a standard manifold you will know ...

Onya swaffie.
At least you post what you know.
NS has posted over at another forum that he was guessing(even here too).
NS has then posted that what another guy found( and I have the utmost respect for the guy) years ago (22 from memory) that it backs up his guessing.
This doesn't quite do it for ...

I didnt even try with the standard manifold.
I took the elbow off,
looked at the 60-odd mm diameter hole in it,
Looked at the 75mm hole in the end of the intercooler,
ran a string around the log and a runner to compare the circumference to get some idea of its cross section.
then immediately ...

Ok seeing as you know alot about this, is there anything you can tell me that the info doesnt?
I asked for it to be tuned for power but not smoke puffing everywhere like a coal train.
Its a Patrol Ute aftermarket TD05 Turbo 3" FM Intercooled on 285/75/16
Cheers mate
http://i520.photobucket.com ...

Well firstly its an Auto, I can tell by the torque curve.
Auto graphs are very different to manual graphs for a start.

The pump looks like it has been either tuned, or setup incorrectly.
The air fuel ratio is very lean, which would result in fantastic engine life, no smoke and excellent emissions ...

Well firstly its an Auto, I can tell by the torque curve.
Auto graphs are very different to manual graphs for a start.

The pump looks like it has been either tuned, or setup incorrectly.
The air fuel ratio is very lean, which would result in fantastic engine life, no smoke and excellent emissions ...

I really hope this is a stir up?

The 3L is probably patrol owners worst nightmare. Reliability of this is 1/10th of any TD42.
Cost of getting the TD42 to go 100% better than any 3L would be about 8-10K (which would be considerably less than what it will cost for your planned upgrade)
Add a turbo ...

Even a bolt on turbo kit less the machining you would by lucky to get away under $2K if you fitted it yourself.
Turbo $1200 (good luck with a mismatched pos thats designed for a petrol motor, this figure is more likely to be up around $1800)
Oil and water lines + all the fittings ~$300
Dump Pipe to ...

Nice work mate, im no expert when it comes to pumps, and i have an aftermarket turbo. So im picking i dont have a boost compensated pump?
GQ 95 TD42

Just the trusty old fuel screw on non factory turbo engines mate.
Only aussie vehicle I know of that has a compensator fitted to a non turbo engine ...

sswaffie wrote:Fuel spread can also cause temps to vary between cylinders , whether its pump or injectors flowing different amounts .

My TD42 wagon runs with about 30 degrees spread across all cyl's

What do you think the spread would be in a 250+hp td42 with standard manifold?

Individual pyro's sure do give you usefull info when tuning an engine.
Just about Every highly strung petrol race engine uses individual egt in the tuning process to get the fuelling 100% correct on each cylinder because the engine is being run to within 1% of its life.

Cant really do this on a ...

Those numbers are not actual figures, but are just shown to allow the difference to be seen and show the problem with just taking an overall reading on a engine with highly unbalanced airflow. The difference will obviously vary depending on the setup.

There is a divider in that manifold from memory ...