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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#28195 01/30/2002 4:15 AM | Joined: Oct 2001 Posts: 45 Member | | Member Joined: Oct 2001 Posts: 45 | Hello, I finally took my rocker arms off the shelf and took a better look at them. Turns out there are 12, not 6 rocker arms. Also, the instructions say they are for powerglide cars with hydraulic lifters. Why would there be rocker arms for exhaust valves, too? Thanks.
Chad
1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.
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#28196 01/30/2002 4:22 AM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | More intake lift more torque
More intake duration more torque
Are you going to ask me why the intake valve is larger than the exhaust? | | |
#28197 01/30/2002 4:34 AM | Joined: Oct 2001 Posts: 45 Member | | Member Joined: Oct 2001 Posts: 45 | Actually, i was asking why the exhaust valve would need a high lift rocker?
1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.
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#28198 01/30/2002 5:04 AM | Joined: Nov 2001 Posts: 72 Member | | Member Joined: Nov 2001 Posts: 72 | Kinda something about common sense. If you let more in, ya gotta let more out.
Dennis | | |
#28199 01/30/2002 5:09 AM | Joined: May 2000 Posts: 424 Shop Shark | | Shop Shark Joined: May 2000 Posts: 424 | I think all the old hi-lift rocker arms I have are in sets of 6 for the intakes only. Usually 3 lefts and 3 rights. Thomas musta really been goin' after some air flow! | | |
#28200 01/30/2002 5:22 AM | Joined: Oct 2001 Posts: 45 Member | | Member Joined: Oct 2001 Posts: 45 | Barry, thats why I was asking. All the Fentons, B&B, Barker, etc. I have seen are only for the intake. Thats why I was curious why Thomas had rockers for the intakes AND exhausts. Did they know something these other companies didn't!? J.H. and dabond, I apologize if it was a stupid question, must be tough being perfect.
1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.
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#28201 01/30/2002 5:59 AM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | Did you think I was talking down to you............
Get over it!!!
I am far from perfect ONLY CHIEF IS PERFECT!!!
Now somehow I was under the impression that you wanted a real answer SILLY ME!
It won't happen again | | |
#28202 01/30/2002 6:53 AM | Joined: Aug 2000 Posts: 523 Member | | Member Joined: Aug 2000 Posts: 523 | I forgot SOLO is perfect too........
Didn't want you whining!!! | | |
#28203 01/30/2002 9:34 AM | Joined: Feb 2000 Posts: 5,229 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,229 | Are you sure the exhaust is the same ratio as the intake? Maybe they sold them as a set and the exhaust are better than stock but with same ratio. | | |
#28204 01/30/2002 2:03 PM | Joined: May 2000 Posts: 424 Shop Shark | | Shop Shark Joined: May 2000 Posts: 424 | That's very possible Joe. Maybe even due to the lighter weight of the magnesium they wanted to keep them all the same, whether they were stock ratio exhausts and hi-lift intakes or not. I have at least 3 sets of hi-lift rockers for the intakes here, but they are also all cast (or probably forged) like the originals. So they look just like a stocker (and weigh the same), but have a slightly different ratio. So instead of having (6) steel rockers and (6) magnesium rockers, Thomas made them all the same. | | |
#28205 01/30/2002 3:09 PM | Joined: Oct 2001 Posts: 45 Member | | Member Joined: Oct 2001 Posts: 45 | Yea, that sounds about right. Having half magnesium and half cast would look kinda stupid. Thanks guys.
Chad
1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.
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#28206 01/31/2002 12:28 AM | Joined: Oct 2001 Posts: 45 Member | | Member Joined: Oct 2001 Posts: 45 | Just outta curiosity Barry, where is Lake Elmo? Is that down by the cities?
1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.
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