Roller Rockers
 

Hi guys, does anyone know what the cam lobe lift is on a stock 93?
Can I install 1.7 roller rockers without changing pushrods or valve
springs? Any info would be greatly appreciated.

Re: Roller Rockers
 

Stock lift is .444
1.72 rockers will give you about an extra .030 lift so you're looking at around a .474 lift
I don't know if you will need new springs or not but I would think that's pretty close to the limits of the stock springs.

Re: Roller Rockers
 

You can use the stock valve springs, I've had 1.7 lift Cranes on my car with the stock vavle springs for the last 10K miles or so and they're doing fine.

Re: Roller Rockers
 

1.7 on a street driven car may wear the valve seats. (i think thats what they will wear) anyway, they can wear and it it easier to just get a bigger cam to get the extra lift. also, its probably a good idea to buy the hardened pushrods. You don't need the stock ones bending.