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-   -   Builder used different cam than specified. (https://www.offshoreonly.com/forums/general-q/333822-builder-used-different-cam-than-specified.html)

mike tkach 01-16-2016 11:08 PM

just tell him he gets to replace the engine on his dime after reversion kills it,he just might install the cam you told him to.

Crude Intentions 01-17-2016 12:10 AM

110lsa is definitely risking reversion on wet exhaust.

SB 01-17-2016 06:25 AM

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"

cmattj 01-17-2016 06:47 AM


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"

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

jeff32 01-17-2016 07:37 AM


Originally Posted by 79formula (Post 4394365)
I could strangle this guy right now!

How many hp under your 600 mark

GETTINBYE 01-17-2016 07:43 AM


Originally Posted by 79formula (Post 4394342)
I have EMI Thunder exhaust with taller risers. The water mixes in about 5 inches before the transom. Do you think I will suffer from reversion?
http://i880.photobucket.com/albums/a...65182309_o.jpg

Not sure about the cam "he picked" but feel you would have a high likely hood with the 134561. I used that cam in a 454 after it being recommended by a very well know person in the industry. It was to much for the exhaust I had and I did have a reversion issue.

Mark

79formula 01-17-2016 07:47 AM


Originally Posted by jeff32 (Post 4394409)
How many hp under your 600 mark

I have not dynoed it yet. I just have a really bad taste in my mouth from this builder.

Craney 01-17-2016 07:51 AM

Is he paid in full? If not hold a $1000 in a escrow, if you have no reversion and makes 600+ hp you release the money.

SB 01-17-2016 07:56 AM


Originally Posted by GETTINBYE (Post 4394411)
Not sure about the cam "he picked" but feel you would have a high likely hood with the 134561. I used that cam in a 454 after it being recommended by a very well know person in the industry. It was to much for the exhaust I had and I did have a reversion issue.

Mark

NA or Roots SC ? What exhaust ?

vintage chromoly 01-17-2016 07:56 AM

How about telling us who it is so no one else has to go down the same path?


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