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optimum torque GIVES optimum power, since power=torquexspeed. yes, stoichiometric is 14.7 (lambda=1). Though you can go leaner than this for cruising/part throttle.

well...if your mapping a car on the rolling road, sticking your head out the back to take a visual on exhaust gas isnt really going to get you far! typically an engine will require an air-fuel-ratio of around 13:1 to give optimum torque, so thats your target when mapping at full load. then...

Typically you use a wide-band lambda sensor which gives real-time exhaust gas composition changes, and so set fueling that way, as obviously oxygen content changes as a function of fuel input. You can also use exhaust gas temperature as an indicator of efficiency of burn, but this is also...

PMSL! Well ive only been saying it for 5 pages! Ditch that garage, they will f**k it up.

well a mismatch in a joint which encounters airflow is going to create energy loss in the flow. its going to disturb the flow, casue areas of turbulence which causes a restriction manifold matching is nothing new, i think on these engine we see nice gains because theres two joints, as opposed...

the inlets do do quite alot tho, thats why we see gains....its nothing to do with cars being fucked, my mates was less than a year old, fully serviced and in MINT conditiuon!!! to be fair, most of them are down on power to begin with. this isnt to say mods are less worthwhile, its just part...

Its likely isnt in the grpN spec as regs wouldnt permit it perhaps....in which case builders would look for the best match from a pile of different parts. As far as the figures im quoting go, the 182 im on about made 167bhp peak before inlet mod, completely standard. Believe me, dont...

a gain of 10bhp was also measured on a 172, on the same dyno.

That'll be the dyno yours was mapped on then? Ive seen 12bhp on a friends 182...on a dyno which is painfully accurate. I dont do bullshit, despite its deep colour, its often transparent.

they get dirty more than anything else....

only way to tell really would be to run it up and check on the software how close they are to max duty cycle. or find out the flow, divide it by 5, then divide by 4, to get a rough idea of what the power capabilities are.

Its a very hypothetical and subjective question...so I dont really know why im bothering ....but lol... Given the gear ratios are the same, and the peak power is the same, and that the turbo will yield more power and torque at all lower rpms (by virtue of its operation), then its fair to say...

read my reply a few posts up...that explains how/why.

In all seriousness.... If they made the same peak power (I assume you meant this when you said "same bhp"), then as always, the turbo engine will make more torque lower down, obviously...and as said by a few others already. What has been said about same power = same SQM time ISNT strictly...

what colour are the cars? The blue one will be fastest.

yes basically. The main constraint for manufacturers these days are emmisions really.The OE manufacturers have to account for alot more variables and conditions, giving a more finite operation. e.g. cars will be sold all over the world, so sea level, humidity, etc etc all have to be accounted...

dropping the fuel pressure will cause it to lean of slightly, and so drop the emmisions...if they are telling you otherwise I really would question their abilities. You wont get any problems with detonation as you wont be under any high load.

The main benefit of an after-market ecu on a high-(ish)-ly tuned NA engine is that they ARENT speed density based, and so arent as delicate when we are looking at fluctuating inlet pressures. Yes, as Paul says they are typically alot simpler in terms of functionality, and this is a good thing...

I give up....

fit an adjustable one.....

they dont much anymore at all... seriously, drop the fuel pressure.

who mapped it in the first place?

as I said a fair few posts ago...its likely a mapping issue. Ive also made a suggestion as how to go about getting it emmision friendly without accessing the ecu....

aye defo self adjuster

From personal experiences of dealing with Henk, albeit a few years ago now, I can say he is very helpful and never once shy'd away from resolving issues when some of his hardware was in its infancy. I would definately recomend him....

send me a drawing of what you want, and i'll get them made. They are made to customer specifications. So you work out dimensions etc, and thats what you'll get. I dont supply these other than for my own use/purposes, which is typically based on Mk1 Clios and ordered as and when for...

sorry, rad on its own is £350. for a 12" fan its about £50-60 I get the rads made by a local firm.

filter £120 radiator&fan £350 fuel pressure reg. £50 all adds up!

perhaps you did, but if u unplug an injector like young Dan is suggesting, your HC will rise.

HC will be out the window if its miss-firing from cutting a cylinder....come on Dan, you got to think about these things. The best thing to do if u dont have access to the map/ecu, is to fit an adjustable fuel pressure reg, and drop the fuel pressure till its on the verge of stalling. If HC...