Offshoreonly.com - Builder used different cam than specified.

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Black Baja, out of curiosity, how and what would you do to modify the tails?

Quote:

Originally Posted by Black Baja (Post 4394444)

You could always have your tails modified then you will not have to worry about it unless you get stuck in reverse on a windy day.

I'm not dickin' around with my exhaust. I ran a 132561 cam with the same exhaust and had no issues.

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.

Quote:

Originally Posted by cmattj (Post 4394399)

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.
.
Engine warranty ?? Just curious

even though it is supercharged it is still in vacuum at low rpm and can revert water.

Quote:

Originally Posted by Black Baja (Post 4394439)

I would call the credit card company and decline the charge. Remove the cam he installed give it back to him and install whatever cam you feel is correct.

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.

Quote:

Originally Posted by mike tkach (Post 4394456)

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!"

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).

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.

Quote:

Originally Posted by SB (Post 4394397)

Comp 11-314-4 280ah-10 Hyd Flat Tappet
232°, 237° at .050"
Valve Lift .547", .547 "
LSA 110°
14.5° Overlap at .050"

Crane 134561 H-296-2 Hyd Flat Tappet
236°,246° at .050"
.553", .571"
LSA 114
13° Overlap at .050"

Part Number: CRN-132561
228, 236 at .050"
0.530", 0.551".
LSA 114
Overlap at .050" 4°

big question,,who is the engine builder?

Quote:

Originally Posted by 79formula (Post 4394463)

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!"

he'll blame your exhaust when it has problems and will not honor the warranty.