Fuel injector size, duty cycle and the meaning of life...

[plohl]

flywheel HP, standard calcs.

Dann

Cool. How much have you found is lost through the transmission and diff?


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[mmx005]

im running itbs on my nb8a with 805c cams, new haltec and a whole bunch of other mods on the stock injectors. im pretty happy with my 132.5 killer wasps at the rears (132.5 / 0.75 = 176.66 hp at the rears) and im not having any afr issues

[NitroDann]

That must be a world record on cams that size. most get around 95 or maybe 100wkw out of that cam profile.

Dann

[plohl]

im running itbs on my nb8a with 805c cams, new haltec and a whole bunch of other mods on the stock injectors. im pretty happy with my 132.5 killer wasps at the rears (132.5 / 0.75 = 176.66 hp at the rears) and im not having any afr issues

Are you sure it is killer wasps? or kilowatts? or horsepower - if it's in watt's, that's pretty impressive stuff. Got a dyno plot or something?

What sort of haltech are you running? Mine is pretty old.

[sailaholic]

I agree with dann. I don't see how that kind of power output is possible on either thoes cams or injectors.

We're the nb units a bigger capacity injectors to na ones as all the calcs say na8 injectors just can't flow enough fuel at stock pressure to make 130 kilowatts. 130 hp might be achievable though.

[plohl]

http://miataturbo.wikidot.com/fuel-injectors

suggest nb8a are 256cc/min.... na8 are 255cc/min

[sailaholic]

So essentially the same.

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[plohl]

... a whole bunch of other mods...

Haha - other mods include adjustable fpr and a turbo hahahahhaha

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[project.r.racing]

the injectors are within 12cc of eachother. but the big difference is the nozzle/s. the old skool NA8 ones have 1 large single spray nozzle, the later NB8 ones have 4 small spray nozzles. the later atomizes fuel better, hence requiring less fuel to run the engine. First used in 323 from May 1996 onwards.

Example of post 96 323/MX5 injector nozzles:-


220cc May96-May98 323 injectors, good updage for NA6.


252cc NA8 / 90-May96 323 injectors.


240cc NB8 injectors.


265cc NB8 turbo injectors.

[mmx005]

Seriously, its 132.5 kilowatts, stock injectors, stock valves,valve springs and con rods (unfortunately) stock fpr but the vac line has been removed. I've been told that no vac line makes it run at max pressure at all times.


It's my daily drive, running 98ron, 2.25 in exhaust, extractors , 805c cams, all the usual N/A parts/work that you do when an N/A motor. Ecu is a haltec stand alone (1000 platinum sprint I think) with a 7.5k or 8k limiter

Oh yeah, forgot to mention I got of these weird trumpet like things made by some mob called jenvey. No idea but They sound nice and are shiney. Think they are called itb's or something :-P (end piss take :-P)

I LOVE my DAILY dríven N/A monster with quads and all. SOOOOOOO much fun :-D Quads
Have only been on since august 2012 and the haltec since November 2012. Had a piggyback before that, my engine had done over 100k klm's prior to the quads and haltec going in. Wasn't a gentle 100k+ klm's either. It gets a flogging on a regular basis. Got over 305k klm's on the car now.

I would show photos/ dyno graphs if only I knew how.

Happy to show in person if I can get to some events.

[plohl]

Seriously, its 132.5 kilowatts, stock injectors, stock valves,valve springs and con rods (unfortunately) stock fpr but the vac line has been removed. I've been told that no vac line makes it run at max pressure at all times.


It's my daily drive, running 98ron, 2.25 in exhaust, extractors , 805c cams, all the usual N/A parts/work that you do when an N/A motor. Ecu is a haltec stand alone (1000 platinum sprint I think) with a 7.5k or 8k limiter

Oh yeah, forgot to mention I got of these weird trumpet like things made by some mob called jenvey. No idea but They sound nice and are shiney. Think they are called itb's or something :-P (end piss take :-P)

I LOVE my DAILY dríven N/A monster with quads and all. SOOOOOOO much fun :-D Quads
Have only been on since august 2012 and the haltec since November 2012. Had a piggyback before that, my engine had done over 100k klm's prior to the quads and haltec going in. Wasn't a gentle 100k+ klm's either. It gets a flogging on a regular basis. Got over 305k klm's on the car now.

I would show photos/ dyno graphs if only I knew how.

Happy to show in person if I can get to some events.

Where abouts do you live?

Email me photos/dyno plots. Pmd you my email address.

It come down to pics or lies Haha.

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[sailaholic]

Also comes down to dyno accuracy, as mania, for example, are know for having a dyno that produces (artificially) high numbers.

We nor saying your living, just that you may have been mislead by your tuner.

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[mmx005]

I knew some one would eventually say that the dyno my car has been on was generous. I have my own opinions and experiences with manias dyno, they appear to be different to yours. We are all entitled to a point of view.

My car was last tuned my a bloke on the central coast who also tunes the quickest falcon in AUS (8.26 sec 1/4 mile)

For those asking, I live on the central coast of nsw.

I do believe in pix or lies, I will work on some.

Maybe its time I started my own garage thread.

Just had a thought, maybe we organize a dyno day and have this out :-p

[Magpie]

Just had a thought, maybe we organize a dyno day and have this out :-p

Give to the end of June and name a place between the Gold Coast and your place for a dyno day and I'll bring my natural aspirated MX5 down to compare dynos sheets. It will be running 288 deg in/ex cams with 10mm lift and Jenveys so a good apples for apples shoot out. I'm sure NitroDann would be happy to umpire as he is not biased towards natural aspirated

[NitroDann]

Why dont you pair just drag race?



Also im in newcastle, buy me and my partner a flight and Ill be there

Dann