Roller Rockers

J114 · 02-04-2005, 09:57 PM

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.

82 GT · 02-05-2005, 01:48 AM

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.

tireburner163 · 02-05-2005, 02:12 AM

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.

yellow95stang · 02-10-2005, 03:24 PM

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.

02-04-2005, 09:57 PM	#1
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	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.

02-05-2005, 01:48 AM	#2
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	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. __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

02-05-2005, 02:12 AM	#3
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	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. __________________ 1987 Buick T-type 1998 HD Electra Elide

02-10-2005, 03:24 PM	#4
yellow95stang Registered Member Join Date: Feb 2005 Posts: 6	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.

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