will a 100 shot be O.k
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TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
will a 100 shot be O.k my car makes 385rwhp and i was spraying a 75 dry but i just upgraded to a 255 walbro pump and the 30# injectors so can i now spray a 100 without a problem
hit up the Nitrous Forum...u will find the answers u are lookin for. In short, yes u can easily spray 100 dry with ur setup. Y not spray a bigger shot, i am throwin a 250 shot at my stocker and it loves it
Well here's the easiest way to tell if you ma get into trouble.
(Projected flywheel HP x .5) / 6.4 = min inj to meet 80% DC rule
So we first need to turn your projected hp into BHP. We just subtract 15% from your anticipated 385rwhp + 100rwhp shot = 485rwhp.
485 - 15% = 412.25bhp
412 x .5 = 206
206 / 6.4 = 32.18 injector to meet the 80% duty cycle rule. So, your 30's will be fine at these hp levels. Don't worry about going over 80% on a short 1/4 run, won't cause any issues, we just don't want static (100%).
I would still log a/f and kr on intial runs.
Robert
(Projected flywheel HP x .5) / 6.4 = min inj to meet 80% DC rule
So we first need to turn your projected hp into BHP. We just subtract 15% from your anticipated 385rwhp + 100rwhp shot = 485rwhp.
485 - 15% = 412.25bhp
412 x .5 = 206
206 / 6.4 = 32.18 injector to meet the 80% duty cycle rule. So, your 30's will be fine at these hp levels. Don't worry about going over 80% on a short 1/4 run, won't cause any issues, we just don't want static (100%).
I would still log a/f and kr on intial runs.
Robert
Thread Starter
TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
i just logged the car on a 75 shot and my duty cycle at one point was 87% so i am kind of worried i guess i need to get back to the dyno to read my A/F. i am still new to all this tunning and stuff and just want to be safe. i did spray once or twice before a 125 dry with the stock injrctors with no problem so i am gonna go ahead and do a 100 today and some more logging i will post up later the results.
Originally Posted by chris77
i just logged the car on a 75 shot and my duty cycle at one point was 87% so i am kind of worried i guess i need to get back to the dyno to read my A/F. i am still new to all this tunning and stuff and just want to be safe. i did spray once or twice before a 125 dry with the stock injrctors with no problem so i am gonna go ahead and do a 100 today and some more logging i will post up later the results.
Robert
Thread Starter
TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
well i just installed the walbro 255 pump with the new injectors so i should be good. i do have HPtuners that i recently got but realy dont know much about it so far all i have done is some data logging and tune for the injectors. i am about to go wash the car, put my M/T's on and put in the 100 shot pills. tonight i have a race against an 04 cobra thats making 495 rwhp so i'm hoping everything go's well. this cobra freakin moves but i think i have a good shot
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Originally Posted by chris77
well i just installed the walbro 255 pump with the new injectors so i should be good. i do have HPtuners that i recently got but realy dont know much about it so far all i have done is some data logging and tune for the injectors. i am about to go wash the car, put my M/T's on and put in the 100 shot pills. tonight i have a race against an 04 cobra thats making 495 rwhp so i'm hoping everything go's well. this cobra freakin moves but i think i have a good shot
Robert
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Verdad Gallardo Thread Starter
TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
Originally Posted by Robert56@NitrousDirect
You can use your narrow band readings from your HP tuner to get an idea of rich or lean. Your WOT 02's in the range of .880/.890 (12.8/12.9 a/f) are ideal for n/a. Higher numbers mean richer (which on the spray you want) and lower numbers mean leaner.
Robert
Robert
Originally Posted by chris77
well i just installed the walbro 255 pump with the new injectors so i should be good. i do have HPtuners that i recently got but realy dont know much about it so far all i have done is some data logging and tune for the injectors. i am about to go wash the car, put my M/T's on and put in the 100 shot pills. tonight i have a race against an 04 cobra thats making 495 rwhp so i'm hoping everything go's well. this cobra freakin moves but i think i have a good shot