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| Author: | jesse [ Sun Dec 01, 2013 6:17 pm ] |
| Post subject: | valve springs |
went out this weekend and blew apart the inner spring on one side so need to buy some new ones i have a 120 cam on 1.4 rockers what set of sprigs should i get this is what i see to choose from http://www.cbperformance.com/ProductDet ... tCode=1493 http://www.cbperformance.com/ProductDet ... tCode=1491 |
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| Author: | gasman [ Sun Dec 01, 2013 6:37 pm ] |
| Post subject: | Re: valve springs |
The w series cams are not designed for 1.4 rockers. Not only will it wear your valve guides and stems out it will beat your seats to death with the pressure it needs to keep lift and closing on the quick fall off the ramp of the cam. Not knowing what heads you have I'd say put 1.25 rockers on it and use a good set of springs and be done and get longer life and not abuse it just to run 1.4's IMO. Chad 
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| Author: | Aaron Creech [ Sun Dec 01, 2013 8:32 pm ] |
| Post subject: | Re: valve springs |
What is the ACTUAL total lift? Were the springs new? If your gonna leave it like its set up now,get the cb 650 springs and be done. |
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| Author: | jesse [ Sun Dec 01, 2013 10:42 pm ] |
| Post subject: | Re: valve springs |
No was not new springs and I dont know how to do the math to know the actual lift and I know that they say not to run a 1.4 but anyone actually do it on their 120 or 110 and it works ok |
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| Author: | jon williams [ Mon Dec 02, 2013 12:06 pm ] |
| Post subject: | Re: valve springs |
Multiply 1.4 by the lift on the cam spec card. Posted using the WoodsBuggy Mobile App |
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| Author: | Aaron Creech [ Mon Dec 02, 2013 12:28 pm ] |
| Post subject: | Re: valve springs |
You need to measure the lift with a dial indicator. If the rockers are really a true1.4 it will be around 550". |
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| Author: | Roy [ Mon Dec 02, 2013 9:33 pm ] |
| Post subject: | Re: valve springs |
Make sure your new springs are capable of the lift you actually have. Coil bind is a terrible thing and can cost you big bucks. You need to invest in a dial measurement device or rent one. |
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| Author: | ron [ Wed Dec 04, 2013 5:24 am ] |
| Post subject: | Re: valve springs |
gasman wrote: The w series cams are not designed for 1.4 rockers. Not only will it wear your valve guides and stems out it will beat your seats to death with the pressure it needs to keep lift and closing on the quick fall off the ramp of the cam. Not knowing what heads you have I'd say put 1.25 rockers on it and use a good set of springs and be done and get longer life and not abuse it just to run 1.4's IMO. Chad Chad , I have to say there is a way to run 1.4 rockers with 110 , I have ran that combination for 7 years on 2 sets of heads , comp eliminaters & the ones I'm running now on my new motor are gene berg heads , I use vw 650 valves spring on the berg heads & k- motion 800 on the comp heads & the k- motion springs had almost 250# seat pressure , the key thing is to run pauter roller rockers & racing valve guides cut to allow for the lift ( some will not require cutting ) I didn't do it on my comp eliminaters ( valve springs are "200" longer on the comp heads ) , the new motor I have now is a 2574 cc ( 88 x 96.5 ) and I run a 110 with 1.5 roller rockers ( 645" lift ) and I drove it for about 12 or 14 rides so far , but you know I'm very easy on my motors & hardly break idle speed , but so far its holding up with the 1.5's! 
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| Author: | jesse [ Wed Dec 04, 2013 7:57 am ] |
| Post subject: | Re: valve springs |
Well if I can ever get cbs site to let me buy the 650 springs Im gonna give them a try cause it ran damn good on the 1.4s and hate to change lol |
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