Builder used different cam than specified.
01-17-2016, 09:30 AM
#42
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Summit Racing Part Number: CRN-132561
Intake Duration at 050 inch Lift: 228
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 228 int./236 exh.
Advertised Duration: 298 int./306 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.530 int./0.551 exh.
Lobe Separation (degrees): 114
Summit Racing Part Number: CCA-11-314-4
Intake Duration at 050 inch Lift: 232
Exhaust Duration at 050 inch Lift: 237
Duration at 050 inch Lift: 232 int./237 exh.
Advertised Duration: 280 int./288 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.547 int./0.547 exh.
Lobe Separation (degrees): 110
At .050 the new cam is 4* bigger on the intake and 1* bigger on the exhaust. Its the 110 vs 114 lobe sep that makes me wonder if it will work.
01-17-2016, 09:35 AM
#43
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iTrader: (3)
There you go. Side by side.
To me that 110 lobe center starts getting interesting because even though the Comp cam appears smaller its actually a rougher idle with a mid range power band .
Normally aspirated as I stated low idle reversion could be and issue. It is super charged now and that will change the reversion pulses at idle (Low Low idle are still a issue)
I think it will be Fine but you may want to check back in with Mild Thunder whom your original set up was with and confirm. He's been down this road with his experience.
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Engine warranty ?? Just curious
To me that 110 lobe center starts getting interesting because even though the Comp cam appears smaller its actually a rougher idle with a mid range power band .
Normally aspirated as I stated low idle reversion could be and issue. It is super charged now and that will change the reversion pulses at idle (Low Low idle are still a issue)
I think it will be Fine but you may want to check back in with Mild Thunder whom your original set up was with and confirm. He's been down this road with his experience.
.
Engine warranty ?? Just curious
01-17-2016, 09:47 AM
#44
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iTrader: (3)
only problem i see with that is whatever warranty he has will be void if he changes the cam.maybe the builder had that in the back of his mind when he installed the comp cam.for the life of me i can,t see why the builder did not install the cam the op asked for.
01-17-2016, 09:56 AM
#45
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I thought about that too. If I open it up and have problems later on, he will say "you should have left the cam I put in there. Too bad!"
01-17-2016, 10:05 AM
#46
Other than "this is the cam I put in" did he ever give you an explanation of why he felt one cam was better than the other, pros cons? It seems strange he would swap cams without a word about why (the after the fact part without consent when I had done my research would chap my A$$ BIG time).
01-17-2016, 10:09 AM
#47
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He just stated "I don't like Crane Cams. This Comp cam is better." I just had the part number when I picked it up. So I just assumed the cam numbers were equal and he just prefered Comp. I thought they were the same cam, just different brands. Then I compared the specs when I got home.
01-17-2016, 10:18 AM
#48
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228, 236 at .050"
0.530", 0.551".
LSA 114
Overlap at .050" 4°
01-17-2016, 10:19 AM
#49
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big question,,who is the engine builder?
01-17-2016, 10:21 AM
#50
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