engine timing for nitrous?

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Jul 15, 2008 | 07:30 PM

1994t/a

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engine timing for nitrous?

Ok ive read the sticky "nitrous faq" sticky.i want to know if you pull base timing out of the engine or do it with the vaccum advance disconnected and pull the advance timing back some? im doing it on a carbed small block 350 10:1 compression,mild cam and single plane intake with a 100 shot for starters

Last edited by 1994t/a; Jul 15, 2008 at 07:54 PM.

Jul 15, 2008 | 09:16 PM

MORETHANQUICKSTANG

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well what timing are you running on the motor already?

Jul 15, 2008 | 09:21 PM

mrdragster1970

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It's been a long long time since I had vac adv. IIRC, I would take 4 from base & tune down from there.
I never adjusted timing with vac hooked up, plug it while adjusting. Good luck.

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Jul 15, 2008 | 09:24 PM

MORETHANQUICKSTANG

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From: so cal

for every 50 take 2 deg off of timing.. put play it safe.. go a little more and dyno it to make sure.

Jul 16, 2008 | 03:47 AM

ZONES89RS

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Well, i have removed the vacuum to check time, and i have also left it, but on my cammed motors, the vacuum makes nothing at RPM at all, on a mild to stock motor, it might be different, it might still pull vacuum. Just do it with the vac line removed, as stated, about 4 deg for every 100 HP.

Jul 16, 2008 | 06:22 PM

1994t/a

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Thanks for the help guys....yeah mrdragster1970 ive heard of alot of ppl not running a vacc advance line....what doest that actually do for the engine perfomance wise?

Jul 16, 2008 | 06:58 PM

ZONES89RS

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Nothing, it eerly helps fuel economy under partial throttle, giving a bit of advance when you step into it slightly to cruise to higher speeds. At WOT there is 0 vacuum to make it function, so a race car doesnt need one.

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Jul 16, 2008 | 08:04 PM

mrdragster1970

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From: Illinois, RT 66 dragway area

.

I'm a big fan of locked timing, no vac, no mech. I do everything with timers, relays & chips.
I want my stuff rock solid & stable. Consistent every pass. Good luck.

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