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Karl Allen
Samba Member
Joined: March 07, 2006
Posts: 106
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 Posted: Fri Jan 19, 2007 7:31 pm Post subject: 1.4 rockers and stock cam 1915 |
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| Is there any reason why i can't run 1.4 rockers with my stock cam and heads, in my 1915? and will it free up some more hp? |
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Howard 111
Samba Member
Joined: July 09, 2005
Posts: 1827
Location: Virginia
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| Posted: Fri Jan 19, 2007 8:55 pm Post subject: |
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| Yes, a stock cam works with 1.4 rockers and gives a slight boost across the rpm range. You will need shorter pushrods. |
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RIS
Samba Member
Joined: December 18, 2003
Posts: 3044
Location: Youngstown, Ohio
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Karl Allen
Samba Member
Joined: March 07, 2006
Posts: 106
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| Posted: Sat Jan 20, 2007 4:17 pm Post subject: |
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I guess im wondering if it is worth it or not , and some people say shim the 1.4 rockers and some say shorten your pushrods? im looking for a little extra hp but mabey i should have gotten bigger heads or a more aggresive cam but this is the first ac motor ive built so i was alittle cautious ive got mabey 600 miles on it and am pretty pleased  |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15603
Location: Deep in the 405
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| Posted: Sat Jan 20, 2007 5:14 pm Post subject: |
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I don't feel buying new $250 rockers and another $100 for new correct length push rods would be worth the small HP gain.
If you come across a good deal on a used set then I might go for it.
_________________
2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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Karl Allen
Samba Member
Joined: March 07, 2006
Posts: 106
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| Posted: Sat Jan 20, 2007 5:21 pm Post subject: |
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| So dave the best way to use 1.4 is with shorter pushrods instead of shimming correct |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15603
Location: Deep in the 405
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| Posted: Sat Jan 20, 2007 8:33 pm Post subject: |
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Yes, the correct way is cut to length push rods.
However, there are so many variables between different brands of all parts used that every engine must be measured and set up accordingly.
_________________
2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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Multi69s
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Joined: January 24, 2006
Posts: 5573
Location: Lefty, CA
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