3 way crank gear

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03-19-2005, 04:06 PM
lildebbie1111

3 way crank gear

heres a subject for you guys i just purchased a double roller chain and gear set for my small block chevy it has three notches in the crank gear 4 degrees retard 4 advance and straight up timing whats the advantages and dis advantages what do you guys use
03-19-2005, 04:34 PM
lt1s10

Re: 3 way crank gear

Quote:

Originally posted by lildebbie1111
heres a subject for you guys i just purchased a double roller chain and gear set for my small block chevy it has three notches in the crank gear 4 degrees retard 4 advance and straight up timing whats the advantages and dis advantages what do you guys use

depend on what youre looking for. 4 degrees adv. will give you more bottom end, amd 4 retard will hurt your bottom power. i al ways run them stright up. :p
03-19-2005, 06:06 PM
Ives Bradley

Well if u like taking it apart and putting it back together, u can do some research on what works besr for your engine. I usually go straight up for street ,but with some cams u go advanced and maybe make some real low end torque. Which would take some of the top end if u doing short track racing.
03-19-2005, 06:51 PM
BlownGoat

Like the other guys said,Straight up works best in "most" cases.

BG
03-19-2005, 07:37 PM
stepside454

the nice thing about these sets is strait up should mean strait up...assuming its a quality set. a stock timing set is generally advanced 6 degrees
03-19-2005, 07:39 PM
cbreezer

I bought a multi keyed timing chain set with the intension of precisely timing my cam while using a degree wheel.It was disapointing when I realised that I could not dial in my cam to the exact manufacturers specifications due to the limitations of the this design.In the end I ended up choosing the "straight up" keyway knowing that was the closest I could get (1.5 deg. adv.) to the manufacturers specs.If I had the money I would go for an infinitly adjustable timing chain.Good luck!
03-19-2005, 08:25 PM
cbreezer

So you use the crank keys for rough adjustment and offset bushings for final dial in.And the the #6 cyl.(on chevy) has the same timing as the #1 cyl.?
03-19-2005, 09:38 PM
cbreezer

Thanks for the good info.
03-20-2005, 06:47 PM
383 chev

I've done both retarded and advanced. staight up is the only way to go:HMMM:
03-20-2005, 11:03 PM
vette rod

1 Attachment(s)

If your cam is the correct grind to start with you should go straight up.
03-21-2005, 01:24 PM
Dave Severson

Degreeing the cam in on #1 and checking it on it's opposing cylinder is still the best way to set up a cam. Just hanging the gears on the shafts is trusting too many different machinists on too many different parts. It's not uncommon for a cam to be off 4 or 5 degrees from what the manufacturer's card states the centerline is. Offset keys, sprockets, and or busihings will correct the errors and make the cam perform as advertised.