rocker arm set only 1.25:1 ratio - Empi
Part number:
21-2312
Your cost:
$112.35
Description:
Dual springs recommended.
cut to fit push rods required
These bug rockers look very nice. READ THE NOTE BELOW BEFORE PURCHASING.
Made in China.
The oem design allows you to continue adjusting your valves AT the valve. Other styles of 1.25:1 rockers will have the adjusting taking place at the PUSHROD end of the rocker.
8 Rockers only sold here.
Use with rocker stand shims or cut your pushrods to fit (recommended so you can also run swivel feet).
This builders NOTE: I attempted to use these on a stock, single port engine, already using a bolt together rocker shaft kit and stock rockers with swivel feet on an Engle 120 cam. I installed the rockers on the shafts in place of the stock rockers. I extended the rocker studs and shimmed the rocker blocks up to allow room for the swivel feet. I then discovered that my comfortable coil bind gap had almost disappeared! Now, keep in mind, I had done the math before starting this project (see below) and thought 494 wasn't too much lift. I have built engines with more than that with no problem with the coil gap. I tried to change the geometry by using more and also less shims. Not enough changed to make it safe to run. I then went back to the set up as it was before, after determining that the heads simply were not going to accept the additional lift without the spring seat area getting machined.
The moral of this story is that because the math says it will work, doesn't mean it will. BUY AT YOUR OWN RISK.
Here's the math formula to use to determine if you can run ratio rockers that are 1.25:1 style. A Engle 110 cam has a 430 published lift, so, divide 430 by 1.1, that equals 390, multiply 390 by 1.25, the answer is your new lift of 488.64
cut to fit push rods required
These bug rockers look very nice. READ THE NOTE BELOW BEFORE PURCHASING.
Made in China.
The oem design allows you to continue adjusting your valves AT the valve. Other styles of 1.25:1 rockers will have the adjusting taking place at the PUSHROD end of the rocker.
8 Rockers only sold here.
Use with rocker stand shims or cut your pushrods to fit (recommended so you can also run swivel feet).
This builders NOTE: I attempted to use these on a stock, single port engine, already using a bolt together rocker shaft kit and stock rockers with swivel feet on an Engle 120 cam. I installed the rockers on the shafts in place of the stock rockers. I extended the rocker studs and shimmed the rocker blocks up to allow room for the swivel feet. I then discovered that my comfortable coil bind gap had almost disappeared! Now, keep in mind, I had done the math before starting this project (see below) and thought 494 wasn't too much lift. I have built engines with more than that with no problem with the coil gap. I tried to change the geometry by using more and also less shims. Not enough changed to make it safe to run. I then went back to the set up as it was before, after determining that the heads simply were not going to accept the additional lift without the spring seat area getting machined.
The moral of this story is that because the math says it will work, doesn't mean it will. BUY AT YOUR OWN RISK.
Here's the math formula to use to determine if you can run ratio rockers that are 1.25:1 style. A Engle 110 cam has a 430 published lift, so, divide 430 by 1.1, that equals 390, multiply 390 by 1.25, the answer is your new lift of 488.64
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