1.6 Roller Rocker question.
01-20-2004, 12:53 PM
#1
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Thread Starter
Join Date: Jul 2000
Location: Mt. Vernon, IN
Posts: 108
1.6 Roller Rocker question.
By adding 1.6 rockers I increased my lift from 447/459 to 476.8/489.6 Would that through off my computer after it being unplugged. The car surged after startup a bit and even died the first time, and sounds a bit choppier. I know the valves are not too tight. its 1/2 turn after the up and down play is taken out of the pushrod while the lifter is on the base of the cam. I didn't think adding lift the cam would make a sound difference.
01-20-2004, 01:08 PM
#2
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Join Date: Nov 2000
Location: Memphis, TN, US
Posts: 374
Sounds like you have them adjusted wrong. Go back over them and check.
http://shbox.com/1/4th_gen_tech2.html#adjust_valves
http://shbox.com/1/4th_gen_tech2.html#adjust_valves
01-20-2004, 02:05 PM
#4
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Join Date: Jun 2003
Location: Baylor University - TX
Posts: 2,626
Quote from Thunder Racing...
"Thunder Racing carries several different styles of rocker arms. Self-aligning rockers are a "drop-in" replacement for the stock rockers. Comp Cams offers a self-aligning roller-tipped rocker in the Magnum line, and a full roller rocker that is self-aligning in the Pro-Magnum line. The Comp Cams rockers are constructed of chromemoly steel and are available in 1.5 and 1.6 ratios. Crane Cams' self-aligning Gold Race rocker arms are a full roller rocker constructed of aluminum. The stock valve covers can be used with any of these rocker arms without modification and they are only available with 3/8" rocker arms studs."
and they go on to explain non self-aligning rockers...
"Crane aluminum self-aligning rockers will not clear very large valve springs. This is not a problem for most smaller camshafts, but if you are planning to run a very large camshaft or very big springs, you may be better off converting to a non-self-aligning valvetrain utilizing 7/16" rocker arm studs. The 7/16" stud will allow less flex in the valvetrain than the 3/8" stud, which will allow you to obtain maximum performance from your camshaft. This becomes more important as you put a larger cam in the engine. The use of guideplates is also a more fail-safe method of valvetrain alignment as compared to self-aligning rockers. Stock valve covers will require minor modification with this setup. The use of guideplates requires the use of hardened pushrods. The Crane Gold non-self aligning rockers are machined to clear up to a 1.630 OD spring. The design of the Comp rockers allows them to clear very large springs, also."
Hope this helps!
"Thunder Racing carries several different styles of rocker arms. Self-aligning rockers are a "drop-in" replacement for the stock rockers. Comp Cams offers a self-aligning roller-tipped rocker in the Magnum line, and a full roller rocker that is self-aligning in the Pro-Magnum line. The Comp Cams rockers are constructed of chromemoly steel and are available in 1.5 and 1.6 ratios. Crane Cams' self-aligning Gold Race rocker arms are a full roller rocker constructed of aluminum. The stock valve covers can be used with any of these rocker arms without modification and they are only available with 3/8" rocker arms studs."
and they go on to explain non self-aligning rockers...
"Crane aluminum self-aligning rockers will not clear very large valve springs. This is not a problem for most smaller camshafts, but if you are planning to run a very large camshaft or very big springs, you may be better off converting to a non-self-aligning valvetrain utilizing 7/16" rocker arm studs. The 7/16" stud will allow less flex in the valvetrain than the 3/8" stud, which will allow you to obtain maximum performance from your camshaft. This becomes more important as you put a larger cam in the engine. The use of guideplates is also a more fail-safe method of valvetrain alignment as compared to self-aligning rockers. Stock valve covers will require minor modification with this setup. The use of guideplates requires the use of hardened pushrods. The Crane Gold non-self aligning rockers are machined to clear up to a 1.630 OD spring. The design of the Comp rockers allows them to clear very large springs, also."
Hope this helps!
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