What ratio roller rockers? 206 ductile roller, & ported stock heads

[87 WE2]

Going to be running ported stock heads, exhaust guides cut down to intake guide height with a 206/206 ductile roller cam.

What ratio roller rockers? 1.55, 1.66, or 1.65? or stick with stock replacement rockers on HD shafts?

Street car, little track use on drag radials. Thanks

 

[SPOOLN]

Rr

You will not gain any HP with RR . i would go with the stock rockers with the HD shaft and use a push rod length checker for each valve. Set lash at .030 and order custom length hardened push rods.

 

[Slow91z]

I personally like the reliablity factor of roller rockers and it definitely make pushrod selection easier...If it's a money issue that's different, but if not I say do it...And I say if it's not going to screw up your valve spring choice (if you've even made one yet) then why not go with a high ratio.

 

[ThikStik]

Can make more hp if getting bigger ratio because lift will increase. Know that youll have to have valve covers if stepping up to r rockers. good luck

 

[forzfed]

Can make more hp if getting bigger ratio because lift will increase. Know that youll have to have valve covers if stepping up to r rockers. good luck

I still have my factory valve covers, just went with RJC spacers.

 

[m233roller]

87 WE2

I have ran 1:55's and 1:60's with a 206 cam and you WILL make alittle more horsepower with roller rockers and bumping the cam lift up. Went from 4:96 lift to 5:12 lift with 1:60's.

 

[87 WE2]

87 WE2

I have ran 1:55's and 1:60's with a 206 cam and you WILL make alittle more horsepower with roller rockers and bumping the cam lift up. Went from 4:96 lift to 5:12 lift with 1:60's.

Thanks Mike, do you know what the lift change is with a 206/206 to 1:55 roller rockers?

 

[TURBOPOWERED68]

87 WE2

I have ran 1:55's and 1:60's with a 206 cam and you WILL make alittle more horsepower with roller rockers and bumping the cam lift up. Went from 4:96 lift to 5:12 lift with 1:60's.

Was this on OE heads?
What brand Roller set up did you use?
Did you have to adjust the rockers to line them up to the valves?

 

[turbo nasty]

1.55 will give you the best valve spring life

 

[bison]

With iron heads you will gain about nothing with more than about .500 lift.

 

[m233roller]

4;96 is the lift with 1;55's which is the stock ratio.

 

[larrym]

won't the exhaust guides need to be cut down for anything over .500 lift?

 

[bison]

won't the exhaust guides need to be cut down for anything over .500 lift?

Id check all that on anything over .450" lift

 

[m233roller]

X's 2 on that bison.

 

[charlief1]

X3 and in some cases it may be lower than .450.