how much HP would this yield on a Type-R?? taking my car to the dyno tomorrow and would like to know a baseline figure......

 

i guess it all depends how much youre advancing...whether it be Ignition or camgear. Expect somewhere around 5-10..maybe no gain....at all who knows.

 

basically bump up the ignition timing to 18.5 degress and tune the fuel to match...... they say 9kw gain at the wheels, and a guy i know has done it and vouches for this. 9kw for this kind of modification is alot dont ya think??

and how accurate are those dynos that hook up onto your wheel hub/spindle??

 

1 kw = 1.34 hp

A 9 kw gain at the wheels = 12 whp gain for you who did not know.

The goal of any fuel tuning is to flatten the torque curve (using a wideband O2 sensor on the dyno). Depending along where the gain occurs that he is vouching for, a gain of 12 whp is conceivable but optimistic (i.e. maybe possible in the midrange).

 

I saw the Mirko team tuning David Leslie's program on this portable Dynopack at Mosport. It must be a hell of a lot more accurate than the Dynojet's chassis dynanometers since the Dynopack are hooked up directly to the hub and eliminate the effect of wheel size, wheel weight, and tire pressure related bounce...at least it would be more repeatable and you don't get these miraculous 3 whp gains from doing nothing.



cheers

 

thanks, very interesting...... so i guess those figures are achivable albiet not as peak power!

everyone ive asked reckons the dynojet chassis dyno are more accurate that the dynopaks that hook onto the hub?? lets say if we dyno the same car back to back on the Dynojet then on the Dynopack...... would the figures be the same, or is it just a matter of consistency, ie. one of them is more consistat than the other.????


[Modified by N1 Spec, 3:21 AM 7/13/2001]

 

I always like to pop up Jack's dyno as the poster child of what your torque curve should look like after fuel tuning...i.e. flat. This is the one time in your life you'll want a flat girl....and she puts out.



As for the accuracy of the dynapack: I have never dyno'd my car on one...the 2 dynos in Toronto are Dynojets...so this is all pure speculation on my part. If you want to get a sense of your motor's output to the ground then I would think the Dynapack is more accurate...i.e. no effect of wheel/tire pressure on the output. We know if you dyno on a Dynojet with 17 in wheels and then switch to 15 in. wheels there will be an increase across the board. This has zero to do with what happened motorwise.

The Dynapack should be more consistent. I've not had any problems with Dynojet reading spurious increases from no setting changes but people have reported increases that maybe related to tire bounce on the Dynojet giving false readings of a power improvement (from doing nothing tuningwise).

 

Yeah that is what a torque curve should look like after fuel tuning(oh yeah he also added camshafts and cam gears.)

 

and your point is....

 

would 100 octane w/ max advance on timing do anything to an other wise stock motor?

yoshi- who thinks prolly not

 

My point is he is asking about fuel tuning and timing advance and what it might do for his powerband and you show him before and after dyno runs of a camshaft install. This could lead to false hopes of what fuel tuning would actually do. The only type of fuel tuning on a stock engine that could make such a change is if you install that fourth injector someone forgot to put in.


[Modified by typer 00-115, 2:16 AM 7/14/2001]

 

Absolutely! I wouldn't advance too much otherwise the computer pulls back the timing.

 

that's a nice way of putting it