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Old 11-02-2010, 02:09 PM   #1
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Retard timing for nitrous

I would like to up my jet size to a 75 shot. according to zex i should retard my timing 2 degrees to do this. i was wondering what the best way to do this is. any ideas?


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Old 11-02-2010, 08:06 PM   #2
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A tune will be the only way to get that done , If your running nitrous you should have a tune anyway

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Old 11-03-2010, 08:40 PM   #3
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i was wondering about just putting nitrous, why would i need a tune just to run some nitrous?

dont be hatefull please? im getting to the point where i need a tune and am new to all this tuning stuff.
sorry to thread jack
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Old 11-03-2010, 09:11 PM   #4
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Quote:
Originally Posted by Hexagram View Post
i was wondering about just putting nitrous, why would i need a tune just to run some nitrous?

dont be hatefull please? im getting to the point where i need a tune and am new to all this tuning stuff.
sorry to thread jack
You must add the proper amount of fuel WITH the nitrous in order for it to work properly and safely. To much nitrous and not enough fuel and you can kiss the engine goodbye.
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Old 11-03-2010, 09:12 PM   #5
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so a dyno tune would this for me then?
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Old 11-04-2010, 10:32 AM   #6
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Quote:
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so a dyno tune would this for me then?
Yep. Or a remote tune from Tom (1turbofocus)
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Old 11-04-2010, 11:41 AM   #7
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Quote:
Originally Posted by Hexagram View Post
i was wondering about just putting nitrous, why would i need a tune just to run some nitrous?

dont be hatefull please? im getting to the point where i need a tune and am new to all this tuning stuff.
sorry to thread jack
Quote:
Originally Posted by alagan182 View Post
so a dyno tune would this for me then?
I would HIGHLY recommend tuning when running nitrous. By mass Nitrous has ~36% oxygen while air has ~23%. This is why is it not difficult to run lean, EXTREMELY lean. A tune will set you air/fuel to the proper ratio. Nitrous will increase flame temperature, etc. during combustion. It also increases the combustion temperature. Fuel enrichment also helps cool the combustion temperature. I would HIHGLY recommend using a bottle heater and safety switch.
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Old 11-04-2010, 11:54 AM   #8
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As stated a tune is needed for fueling AND timing , when making more power the timing needs to be lowered in my opinion 2 deg timing for each 50 shot

There are other things that need to be changed as well , raise fuel psi under load , load , fans etc

You need to get a good tune , doesnt have to be on a dyno but you do need a tune and a wide band air fuel gauge

Tom
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Old 11-07-2010, 07:25 AM   #9
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for 75 I retarded my timing by 3 degrees and a tune is much needed for nitrous and you should put in the biggest jet for fuel. like for a 65 shot you should use the 75 shot for the fuel. make sure you have the right plugs and you dont run lean cause if you do Your motor will be no more. And have all the safety switchs in place also. It will help
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Old 11-14-2010, 01:51 PM   #10
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I ran a nos wet kit with a 75 shot on my focus for a year with no tune. it ran fine. it probably wasent the safest thing, but i had no issues. i just used a bigger fuel jet than called for so it wasent lean. when i run the nitrous again it will be tuned this time.
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