oneludesol

Hey guys, I have installed a NX wet 100 shot on my AP1, but everything I read is telling me that I need to pull 2* of timing per 50hp, which makes perfect sense to me, but obviously there is no way to do that in an S2000 without an EMU. I was thinking though... There are tables for timing retard vs intake air temp right? Could I wire my IAT to read high when my nitrous kit is activated and will the ecu pull some timing?

SOHC_MShue

Dont be a cheap ***. Buy a real engine management system and do it right.

oneludesol

That's not even remotely helpful information, but thanks for the bump I guess...



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SOHC_MShue

It is Helpful. Im telling you what to do to have a better running car.

oneludesol

It's not helpful, you are suggesting that I go with $1200 EMS to pull *2 of timing duing the LITERALLY 50 seconds per year total that the nitrous system is active... I assure you I have weighed that option, and have not pulled it off the table, but if there is another avenue, I'd like to explore it...

mafia

If that $1200 EMS will help save your motor, then yes its worth it.

oneludesol

how will it help save my motor if my AFR's are perfect all the time during spray, and I am able to pull timing reliably with another method? remember, we are talking N2O here, not boost... I die hard 100% believe in proper engine management for heavily modded and boosted cars, but in this case I don't believe its necessary.

Gunmetal_B20_Hatch

iTrader: (9)

Making IAT read high will also pull fuel in addition to timing, not to mention also the possibility of setting a DTC... You will need it on a dyno w/ a wideband to make sure that AFR is correct. In addition, a diagnostic scantool that can stream live data from your ECU will also be a very good idea so that you can watch your timing throughout the pull. I would also recommend 1 step colder plugs, too.

Im not condoning this method of "tuning" but I guess if you want to risk your motor, then by all means, go right ahead.

oneludesol

I have a wideband and an ecu datalogger, so Ill see how it goes... I'm not spraying on a dyno, I have done pretty well to this point on the street. Do you know where I can find a factory fuel trim and timing table for IAT temps? I suppose I could always compensate for the fuel trim with a leaner jet in the nozzle, but hopefully its not that extreme and I can just let it run a tad fat. A voltage vs temp table for IAT would be cool too, thanks!

K7-1Ktrevor

you might be able to look that up through k pro. I know s300 has those values in it. def do step colder plugs though.

Gunmetal_B20_Hatch

iTrader: (9)

Youre not going to find any info like that... Youre going to have to do your own testing. You could get a 0-10K ohm rheostat and datalog the difference in open loop AFR and ign timing as you start adding in resistance. make note of the values and then do a final install with a resistor hard wired into an overlayed IAT circuit.

oneludesol

Thanks for the replys, if worse came to worst, would an Emanage Ultimate be sufficient to add fuel and retard timing while on spray only? Does it have decent N2O support?

kbouchard1092

I use the s300 nitrous control. its a great system. i would look into that..

Im running a 35 shot making 85 ft/lbs and 70hp on a boosted application at 20psi

I have between 5-8 degrees timing pulled from my boost map. Its pretty straight forward software...there is a timing and fuel table for when on nitrous

oneludesol

http://www.nitrousexpress.com/produc...ls.php?id=1488

Change of plans, I just picked up one of these, so I am going to see if I can eliminate a need for timing retard by running this as my fuel source with e85, c16, or straight methanol for the 100 shot... any thoughts?

Turbo-LS

iTrader: (4)

bandaid after bandaid. When adding any kind of forced induction weather NOS or boost you need to pull timing. hacking it up with crap piggybacks like Emanage in nonsense. Get an EMS to save the motor or just run it till it blows up. You can add race gas with the shot and it will help some but your still not doing it correctly IMO. Even the old skool guys will will timing when dumping race gas and NOS into a v8.

nealnanoHX

Yes it is. Get Hondata and have the car tuned for the nos kit. Best way to do this is to use a dry kit, get slightly larger injectors (255lph fuel pump is a good idea as well) and have the car tuned on and off the spray. The Hondata will fully control the nos system and make all the needed fuel and timing adjustments. If you are going to do it do it right. Having a 100hp shot is like having a turbo on the car. You will be increasing cylinder pressures and temps. You are adding in more air with the nos so fuel and timing need to be addressed.

bauergold

Did you really spend $700 on that standalone fuel cell from nx?

Damn, you could have done that so much cheaper.
1 gal fuel cell from summit, 140gph holley or ebay pump, holley regulator.

Then jet the kit as carb kit. Probably cost you $200 if you shopped right.