Preload.. 1 turn = .047" is this really accurate?
06-19-2010, 06:04 PM
#22
I have not bought the replacement 832's yet. The heads had 832's on them when I bought them used from my buddy. I tested a couple of them a few days ago and they were down to 75-80lbs at 1.80 and 300lbs at 1.15".. Since I have the retainers and seat locators for them, I planed on using them again. I'd only have to buy springs.
I can't find the 833's on Cranes web page, but Summit makes them out to be a very similar spring. Same rates (1.80 and 1.15) as well as coil bind of 1.045. Only thing I could find different about them is the spring diameters.
The truck will not be getting much mileage on it for the next couple years since I will be in school and going through the police accademy. Truck is currently non opped and with out insurance. I'll be taking it to the track 3-6 times a year at best. In between track outings, I will also be loosening the rockers to take any extra strain off the springs. I'm sure keeping some open more than others will tend to change spring rates over time.
With that said, are 832's still a bad choice? Do the 833's have better harmonics?
I can't find the 833's on Cranes web page, but Summit makes them out to be a very similar spring. Same rates (1.80 and 1.15) as well as coil bind of 1.045. Only thing I could find different about them is the spring diameters.
The truck will not be getting much mileage on it for the next couple years since I will be in school and going through the police accademy. Truck is currently non opped and with out insurance. I'll be taking it to the track 3-6 times a year at best. In between track outings, I will also be loosening the rockers to take any extra strain off the springs. I'm sure keeping some open more than others will tend to change spring rates over time.
With that said, are 832's still a bad choice? Do the 833's have better harmonics?
06-20-2010, 02:54 AM
#24
Well crap. This doesn't sound as easy as I thought it was going to be.
My heads are going to be milled .025-.030 which is going to require a shorter push rod, obviously.
When you mill the heads does that have anything to do with the wipe pattern on the valve stem? Or do stock rockers on stock heads not require shims like some aftermarket heads do?
My heads are going to be milled .025-.030 which is going to require a shorter push rod, obviously.
When you mill the heads does that have anything to do with the wipe pattern on the valve stem? Or do stock rockers on stock heads not require shims like some aftermarket heads do?
06-20-2010, 03:46 PM
#26
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I have not bought the replacement 832's yet. The heads had 832's on them when I bought them used from my buddy. I tested a couple of them a few days ago and they were down to 75-80lbs at 1.80 and 300lbs at 1.15".. Since I have the retainers and seat locators for them, I planed on using them again. I'd only have to buy springs.
I can't find the 833's on Cranes web page, but Summit makes them out to be a very similar spring. Same rates (1.80 and 1.15) as well as coil bind of 1.045. Only thing I could find different about them is the spring diameters.
The truck will not be getting much mileage on it for the next couple years since I will be in school and going through the police accademy. Truck is currently non opped and with out insurance. I'll be taking it to the track 3-6 times a year at best. In between track outings, I will also be loosening the rockers to take any extra strain off the springs. I'm sure keeping some open more than others will tend to change spring rates over time.
With that said, are 832's still a bad choice? Do the 833's have better harmonics?
I can't find the 833's on Cranes web page, but Summit makes them out to be a very similar spring. Same rates (1.80 and 1.15) as well as coil bind of 1.045. Only thing I could find different about them is the spring diameters.
The truck will not be getting much mileage on it for the next couple years since I will be in school and going through the police accademy. Truck is currently non opped and with out insurance. I'll be taking it to the track 3-6 times a year at best. In between track outings, I will also be loosening the rockers to take any extra strain off the springs. I'm sure keeping some open more than others will tend to change spring rates over time.
With that said, are 832's still a bad choice? Do the 833's have better harmonics?
06-20-2010, 08:27 PM
#27
What are the pressures? I only find them on Summit, but they show the same pressures as the 832's.
You also say they are a direct replacement for the 832's but they show being 1.275 OD vs 1.24 and .667 ID vs .650 on Summits web page.
Is there anything on Cranes webpage giving info on them? I can't find it if there is.
You also say they are a direct replacement for the 832's but they show being 1.275 OD vs 1.24 and .667 ID vs .650 on Summits web page.
Is there anything on Cranes webpage giving info on them? I can't find it if there is.
06-21-2010, 12:01 PM
#30
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What are the pressures? I only find them on Summit, but they show the same pressures as the 832's.
You also say they are a direct replacement for the 832's but they show being 1.275 OD vs 1.24 and .667 ID vs .650 on Summits web page.
Is there anything on Cranes webpage giving info on them? I can't find it if there is.
You also say they are a direct replacement for the 832's but they show being 1.275 OD vs 1.24 and .667 ID vs .650 on Summits web page.
Is there anything on Cranes webpage giving info on them? I can't find it if there is.
377# @1.150
369# rate
O.D.= 1.237
I.D.= .655
Max lift= .650
06-22-2010, 12:12 AM
#33
OK I have a question w/o starting a new thread.
Tonight when I was checking PTV clearance. I did it this way using an adjustable pushrod. I used the one valve open the other closed method. Using a solid lifter I turned it until there was no slack in the valve train and it didn't open the valve. On the intake I got 7.25 and on the exhaust I got 7.0 I tightened the bolt about 1/2 turn but did not torque it down.
With adding a .047 lifter preload I get right at a 7.3 length pushrod(using 7.25). The heads have been milled and it's an aftermarket cam. Am I going to have to use two different length pushrods?
Am I going about this the right way?
Thanks.
Jason
Tonight when I was checking PTV clearance. I did it this way using an adjustable pushrod. I used the one valve open the other closed method. Using a solid lifter I turned it until there was no slack in the valve train and it didn't open the valve. On the intake I got 7.25 and on the exhaust I got 7.0 I tightened the bolt about 1/2 turn but did not torque it down.
With adding a .047 lifter preload I get right at a 7.3 length pushrod(using 7.25). The heads have been milled and it's an aftermarket cam. Am I going to have to use two different length pushrods?
Am I going about this the right way?
Thanks.
Jason
06-22-2010, 11:56 AM
#36
OK. Solid lifter at zero lash can be used for finding PTV. You need to check the valve clearance about every 2 degrees from 20 degrees before TDC to 20 degrees after TDC on the exhaust stroke.
You can use the turns of the adjustable as long as it is the same lifter you plan to use, i.e., LS7 lifter was used for both. If the lifter is different, you may want to re-check the pushrod length with the final hydraulic lifter.
You can use the turns of the adjustable as long as it is the same lifter you plan to use, i.e., LS7 lifter was used for both. If the lifter is different, you may want to re-check the pushrod length with the final hydraulic lifter.
06-22-2010, 12:06 PM
#37
OK. Solid lifter at zero lash can be used for finding PTV. You need to check the valve clearance about every 2 degrees from 20 degrees before TDC to 20 degrees after TDC on the exhaust stroke.
You can use the turns of the adjustable as long as it is the same lifter you plan to use, i.e., LS7 lifter was used for both. If the lifter is different, you may want to re-check the pushrod length with the final hydraulic lifter.
You can use the turns of the adjustable as long as it is the same lifter you plan to use, i.e., LS7 lifter was used for both. If the lifter is different, you may want to re-check the pushrod length with the final hydraulic lifter.