Rockers and thermostat

SlowStang2 · 08-09-2001, 03:12 PM

Two questions asking for two honest answers. I have the stock rockers in my motor still and I have seen people on here talking about 1.6 rockers and 1.7 rockers. I am not mechanically inclined so I am not sure what the benefits are to these. If you can explain to me why these are beneficial and influence me to purchase some, what is the installation like? Are these right underneath the valve covers or must I take apart more? If its not much of a hassle, I'll do them myself. Oh, above all, how can of torque or horsepower can I gain from this or are these another one of those parts that I should do if I am to install something else (cam/larger T/B, better heads, etc)?

My thermostat question is simplier. What temp does the stock one open at? From my signature, do you think I should/would benefit from a cooler one? If so, if one is installed for any other reason than from shi.ts and giggles, what temp should I get? Thanx.

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94' Stang GT Convertible --Cobra upper&lower, GT-40Y Turbo Swirl aluminum heads, Mac cold air w/K&N, BBK equal length shorties, BBK offroad H-pipe, American Thunder cat-back, BBK T/B 65mm, 24lb injectors, Pro-77mm MAM, pulleys, aluminum driveshaft, 3.55s, Steeda Tri-Ax shifter, adjustable fuel regulator 14.4@100 MPH on G-tech;96 at track. (Sad, i know. This is with the stock heads)

PKRWUD · 08-09-2001, 06:44 PM

Changing to 1.7 rockers is a poor mans way of changing the cam. While it will leave some of the stock cams features the same (lobe seperation), it will alter others (increased valve lift). your total valve lift is determined by adding the actual lift and multiplying it by the rocker ratio. If your stock cam has an actual lift of .278", then with the stock 1.6 rockers, your total cam lift becomes .444". With 1.7 rockers, it becomes .473". Looking at your mods, you need a cam improvement. You could try 1.7 rockers, and would notice an improvement, but I think you would be much wiser to install a new cam all together. I think your combo would be nicely complimented with an E303 cam. Then, if you decided later you wanted still more lift, you could add 1.7 rockers.

As far as your t-stat goes, I try to not recommend anything other than the stock 192 degree t-stat, but it depends on your running conditions. If you're not detonating, and the cars not experiencing any other problems, stay with the 192. If you feel that you do need to change it, don't go lower than a 180. Doing so will cause your ECM to overly richen the mixture, resulting in ring wash, diluted oil, and eventually a prematurely worn engine. Not to mention clogging up any cats you may have.

Take care
~Chris

------------------
Retired Moderator
MustangNet

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08-09-2001, 03:12 PM	#1
SlowStang2 Registered Member Join Date: May 2001 Location: Stuart, FL, US Posts: 147	Rockers and thermostat Two questions asking for two honest answers. I have the stock rockers in my motor still and I have seen people on here talking about 1.6 rockers and 1.7 rockers. I am not mechanically inclined so I am not sure what the benefits are to these. If you can explain to me why these are beneficial and influence me to purchase some, what is the installation like? Are these right underneath the valve covers or must I take apart more? If its not much of a hassle, I'll do them myself. Oh, above all, how can of torque or horsepower can I gain from this or are these another one of those parts that I should do if I am to install something else (cam/larger T/B, better heads, etc)? My thermostat question is simplier. What temp does the stock one open at? From my signature, do you think I should/would benefit from a cooler one? If so, if one is installed for any other reason than from shi.ts and giggles, what temp should I get? Thanx. ------------------ 94' Stang GT Convertible --Cobra upper&lower, GT-40Y Turbo Swirl aluminum heads, Mac cold air w/K&N, BBK equal length shorties, BBK offroad H-pipe, American Thunder cat-back, BBK T/B 65mm, 24lb injectors, Pro-77mm MAM, pulleys, aluminum driveshaft, 3.55s, Steeda Tri-Ax shifter, adjustable fuel regulator 14.4@100 MPH on G-tech;96 at track. (Sad, i know. This is with the stock heads)

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08-09-2001, 06:44 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Changing to 1.7 rockers is a poor mans way of changing the cam. While it will leave some of the stock cams features the same (lobe seperation), it will alter others (increased valve lift). your total valve lift is determined by adding the actual lift and multiplying it by the rocker ratio. If your stock cam has an actual lift of .278", then with the stock 1.6 rockers, your total cam lift becomes .444". With 1.7 rockers, it becomes .473". Looking at your mods, you need a cam improvement. You could try 1.7 rockers, and would notice an improvement, but I think you would be much wiser to install a new cam all together. I think your combo would be nicely complimented with an E303 cam. Then, if you decided later you wanted still more lift, you could add 1.7 rockers. As far as your t-stat goes, I try to not recommend anything other than the stock 192 degree t-stat, but it depends on your running conditions. If you're not detonating, and the cars not experiencing any other problems, stay with the 192. If you feel that you do need to change it, don't go lower than a 180. Doing so will cause your ECM to overly richen the mixture, resulting in ring wash, diluted oil, and eventually a prematurely worn engine. Not to mention clogging up any cats you may have. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!