Your B16A dyno results?

[silver_screen]

Normal for an engine dude. im suprised it even made 295nm

[tinkerbell]

o'rly?

[TODA AU]

it is about 0.5 degrees retarded for every 20 thou of an inch removed...

Dave, you love maths & geometry...
It's not linear on the retard when you remove metal

[tinkerbell]

OK, but isn't there a ballpark range?

[ProECU]

Ofcourse it's not linear (ie cam profiles are eliptical), we're dealing with circular geometries, but I agree with Tinkerbell (although it pains me to admit it), the ratio of metal removed to retard conceptually is a linear measure.

Why do you suggest otherwise Adrian? What are we missing?

[TODA AU]

OK, but isn't there a ballpark range?

There is, but it is more than you've quoted.
Ball park guesses don't make for good engine building practice.
FWIW, we always set cams to the correct LCA when building engines.
This can't be done by rule of thumb.
A good example is the rule of thumb used by a certain US cam manufacturer regarding metal removed etc.
This retard rule of thumb was their recommended method of setting correct cam timing.
Needless to say, using their method exactly, the engine performed rather poorly.
Time was wasted at the customers request playing with the timing on the dyno, with no real result.
The question was asked of the cam manufacturer, & after some time, they provided us with the cam LCA's & lift @ TDC figures. We were able to set the cams precisely for the customer & with good result. (Where they ended up would have taken a very long time to arrive at on the dyno.
Though you can use rules of thumb, in this instance I disagree strongly.
Cam timing is critical & aught to be afforded the proper time & effort to get the results you're after.

Of course it's not linear (i.e. cam profiles are elliptical), we're dealing with circular geometries, but I agree with Tinkerbell (although it pains me to admit it), the ratio of metal removed to retard conceptually is a linear measure.

You didn't miss missing anything Evan; you answered your own question, and were at pains to contradict yourself.

[ekhybrid]

any1 got a print out of a stock b16 that they can post up?

[Drew]

220,000km and worn valve guides


Obviously that is an EF8 SiR although there wasn't enough space on the sheet thus the Si not SiR

Damn can't wait to get my own dyno >_< not like there's any space to put one unless I get the dyno packs

[ekhybrid]

wow that was quick lol
what mods did u have btw?

[Drew]

Just that intake pipe and filter

But that shinny red valve cover is really where all the power came from...

It was so beautiful almost mesmerizing to look at, just couldn't help but stare...
So regret selling it to that ****ing drop kick... now it's a wreck, brings a tear to the eye

[ekhybrid]

lol well thats a good result

any1 else with a stock b16 dyno print out? just wanna see the differences in the power/torque curve to compare with my run with the tsuchinoko intake

[andiiso]

i read all 19 pages trying to find anyone with a completly stock B16a2 dyno sheet lolz, i wanna know what people are getting on stock B16a2 on dyno dynamics machine 4th gear anyone have one please ? =]