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Old 10-06-2012, 06:28 PM   #136
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Quote:
Originally Posted by Bullet Ride View Post
Flattest torque curve ever...
Bad? Good?
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Old 10-06-2012, 07:39 PM   #137
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It's a good thing, horsepower climbs all the way up to the top too.
I wish you would have dynoed the stock set-up first though.
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Old 10-06-2012, 07:53 PM   #138
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Originally Posted by Bullet Ride View Post
It's a good thing, horsepower climbs all the way up to the top too.
I wish you would have dynoed the stock set-up first though.
Yeah i wish i did too...

I started to read up on flat tq curve... Looks like thats what pple shoot for... Also read that having a flat tq curve like that means im really close to MBT. Been reading up on more tuning tips around the tq curve vs hp curve vs afr.

Going to try again after pump is installed... And maybe a new fuel filter as well
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Old 10-09-2012, 05:54 PM   #139
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So the other day i was thinking about why the icv didnt work the last time i hooked it up... Then i realized that was was suposed to loosen the idle screw to close the butterflies more so the icv would let the air bypass... Duuuuh...

Today after work i picked up more hoses, clamps, and 90* elbows... Hooked it all together again.. Closed the butterflies.

Purrs like a kitten at the right idle again

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Old 10-13-2012, 01:19 AM   #140
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I will be honest, but the TQ curve on this graph does not make sense.
It is not possible to have to have the curve this flat with AFR all over the place. Looks like the scale on the graph is off. I see it is stretched some.

On n/a engine, afr should be around 12-13, and you're barely hitting 14. Try adding more fuel across the board, but less in the middle rpm band.

What is you injectors size?

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So i did that dyno day today... So from that first dyno pull to todays i was messing around with some tunes and this is what i got with a failing fuel pump..



Ill go back once my new tre-340 fuel pump goes in
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Old 10-13-2012, 06:43 AM   #141
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The chart shows a higher afr due to the fact that the dyno's afr wideband is connected to the exhaust venting system attached to my muffler that is obviously after my cat therefore showing a hight afr than what my aem afr wideband was showing me before cat.

As i stated earlier in the thread im using s52 21.5lbs/hr injectors

Also stated earlier that my fuel pump had failed on me a few days before that last dyno run and hasnt been holding the same fuel psi as before.. I had to make changes on tunerpro rt just to get 13~ afr on my wideband. Which is why i have on order a better fuel pump.
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Old 10-13-2012, 11:49 AM   #142
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So i did that dyno day today... So from that first dyno pull to todays i was messing around with some tunes and this is what i got with a failing fuel pump..



Ill go back once my new tre-340 fuel pump goes in

Holy lean, get a proper reading and tune that way. Considering a M42 has no way to detect knock I'd be very worried.

Your cylinder temps are probably insanely high, that's how I blew my M42.
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Old 10-13-2012, 01:27 PM   #143
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As i said... The aem afr in my car was showing ~13:1 at wot.. The dyno afr will show lean bc of the cat.
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Old 10-15-2012, 03:04 PM   #144
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AFR @ 13 is fine for n/a, but that TQ curve does not look believable, it is too flat for n/a engine.
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Old 10-15-2012, 03:16 PM   #145
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AFR @ 13 is fine for n/a, but that TQ curve does not look believable, it is too flat for n/a engine.

Well thats what it is... Sorry?
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Old 11-16-2012, 12:56 PM   #146
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Holy lean, get a proper reading and tune that way. Considering a M42 has no way to detect knock I'd be very worried.

Your cylinder temps are probably insanely high, that's how I blew my M42.
What afr were you running when you blew it?
I've always heard that the m42 stock ran a little lean..
Im curious to know what the factory afr @ wot are vs a chipped m42 afr @ wot
I know there is timing to factor in but knowing the limits of those afr's may also determine the combustion efficiency that the motor can run leaner than most without damage. According to some engine builders ive been talking to...
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Old 11-25-2012, 05:58 AM   #147
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Just keep in mind this graph:

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Old 11-25-2012, 01:23 PM   #148
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Thanks
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Old 03-09-2013, 03:52 AM   #149
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Hi!

Do you have some improvement? I'm curious about your project!
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Old 03-09-2013, 06:50 AM   #150
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Funny you posted that. Just last night i finally installed my TRE fuel pump. Remember the fuel issues i was having after 5500rpm.. Well now its the complete opposite!

I was able to tune to maintain 14.7 afr at idle

Tuned low load fuel map to 14.7 afr

High load fuel map is around 12-13afr

WOT fuel map it seems that no matter how low i set the values im running 10afr
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