Thread: nitrous on big block chev

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I have a 462 big block chev pro built with 1050 holly dominator, crane 715 lift solid lift roller cam etc. have a cross plate nitrous system, but have never hit the nitro button. the nitrous presently has a 150 jet in it. the advance on the msd distributor is 36 degrees and a chip which will retard the timing 3 degrees when nitrous button is hit. I do not drag this car, and at the same time do not want to blow it up either, but would like to see what it would do on nitrous. My question is: when do you hit the nitrous button, and just exactly what chip must i be using? thanks rd

Hey rdobbs,

Welcome to CHR! Please swing by the newbie forum and introduce yourself.

Pretty serious motor you have there for a street car. What do you have it in?

I'll assume you've got adequate fuel enrichment in your n20 system. Only activate nitrous at wide-open-throttle. Most folks use a microswitch that either contacts the pedal/linkage or carb-linkage. Only WOT. In some cases depending on vehicle weight and compression, you'll want to hold off at the lower revs too.

Timing: rule of thumb I've heard is 2* per 50hp... so 6* in your case.

I'm not the expert but this is the info I have. Maybe some other suggestions will come along...

Good luck..

-Chris

rdobbs i have use nos for 15yrs on alot of different combos.you don't list compression.i can help better if you give a little more info.comp,what gas you run now,dur of cam and centerline.tq convertor stall speed,rear gear.

all i know about the compression is that is has 10.50 flat top pistons, don't
know cam duration, i run just hi test gas, 4000 stall converter and 350 pos
rear end. rd

if the pistons are forged !!the 150 shot should be ok on 462 just put a micro swicth on the carb that way it will only come on at full trottle.can get from summit or jegs. tune, you run 36 on motor run 31 on nos run the best fuel you can. i'm not sure what you can get for fuel but a mix of 91octane and some race 110 would work 5to1 5 rg 1 race.150 is not all that much for a big block.just do small runs and look at the plugs at first make sure no burnt plugs or very lean white pluges.go slow on the install make sure everthings done right and you will be fine.