Gearing for cam motor and nitrous
Thread Starter
On The Tree
Joined: Aug 2010
Posts: 190
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From: Dallas
Gearing for cam motor and nitrous I am ordering a S60 and am trying to figure out what gears to run. I have a m6 ls1 with ms3 cam bolt-ons 389 rwhp na and just bought a Nitrous Outlet wet plate kit. I am probably only going to run a 100 and later a 150. I am running 555r's right now but will run slicks later once I get a little extra cash. I have done the calculators and don't
think that I will run out of gears and could run 28" if I needed to. I just can't decide between 3.73, 3.90 or 4.10's. At the most I will have 650hp on nitrous in the future when I rebuild the motor. Some people say lower gear and others say higher gear.....I just need a little help.
think that I will run out of gears and could run 28" if I needed to. I just can't decide between 3.73, 3.90 or 4.10's. At the most I will have 650hp on nitrous in the future when I rebuild the motor. Some people say lower gear and others say higher gear.....I just need a little help.
At least 3.90s I would say. I have 3.90s in my car and it worked great w/ the nitrous. I have a 228r cam btw. I should have been going through the traps near the top of 4th from what I was told, never made it to the track on the bottle.
TECH Enthusiast
Joined: May 2008
Posts: 537
Likes: 1
Look around the net and there are many drag race calculators around to help out here.
Hp and weight will dictate trap speed. From there, selecting gear ratio is really a math exercise based on tire size. Tough part is to be realistic on hp and get your trap speed right.
S60 sounds like a great choice. Who's drive shaft are you planning to use?
Hp and weight will dictate trap speed. From there, selecting gear ratio is really a math exercise based on tire size. Tough part is to be realistic on hp and get your trap speed right.
S60 sounds like a great choice. Who's drive shaft are you planning to use?
I'm also running the MS3 cam on my H/C car with a S60 rearend, 373's, and 26" slicks but mine is an A4(HSW 150 shot wet plate kit as well). Since yours is an M6, I would say 3.90's with 28" slicks. 
JMHO
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