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50* Seats and Cam Duration

General engine tech -- Drag Racing to Circle Track

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CGT
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Re: 50* Seats and Cam Duration

Post by CGT »

randy331 wrote: Tue Feb 11, 2020 11:07 pm all he wants to see is nice big fat power and power curve when I dyno it
Yeah, you have to somewhat be careful of non-vested bystanders. I experienced a little bit of that recently from others wishing to turn overflowz higher and higher on the dyno...it seemed like an easy decision for others to make :lol:

I was just thinking 55-60° IVC, and as early of EVO as you could throw at it for the cubes and rpm without dorking other things up too bad.... Especially with the exhaust valve placement an LS7 has. But your right,application wasn!'t a consideration of mine when thinking this....only the application of it on the dyno!! :roll: :lol

Good point about the piston speed........:
randy331
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Re: 50* Seats and Cam Duration

Post by randy331 »

CGT wrote: Wed Feb 12, 2020 8:04 pm Yeah, you have to somewhat be careful of non-vested bystanders. I experienced a little bit of that recently from others wishing to turn overflowz higher and higher on the dyno...it seemed like an easy decision for others to make :lol:
Its possible I'm guilty of the above accusation. LOL :D

Randy
paulzig
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Re: 50* Seats and Cam Duration

Post by paulzig »

randy331 wrote: Wed Feb 12, 2020 8:01 pm
Would that be time well spent ?? :)

I decided to,...
Shut the valve sooner to trap more air!!
And calculate my "dynamic comp" to get it just right !!!
Run all the specs through a cranking comp calculator to make sure it is spot on !!!
Keep the ex valve shut later to help build more TQ !!!

There,.. did I leave anything out ?? :mrgreen:

Randy
So a 106LSA reverse pattern cam then :) .... You guys probably go opposite like 255/273, 110LSA .680/.630 lol
steve cowan
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Re: 50* Seats and Cam Duration

Post by steve cowan »

paulzig wrote: Wed Feb 12, 2020 11:25 pm
randy331 wrote: Wed Feb 12, 2020 8:01 pm
Would that be time well spent ?? :)

I decided to,...
Shut the valve sooner to trap more air!!
And calculate my "dynamic comp" to get it just right !!!
Run all the specs through a cranking comp calculator to make sure it is spot on !!!
Keep the ex valve shut later to help build more TQ !!!

There,.. did I leave anything out ?? :mrgreen:

Randy
So a 106LSA reverse pattern cam then :) .... You guys probably go opposite like 255/273, 110LSA .680/.630 lol
lol,i think you are on the money with that prediction :D
steve c
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Re: 50* Seats and Cam Duration

Post by GARY C »

randy331 wrote: Wed Feb 12, 2020 8:01 pm
paulzig wrote: Wed Feb 12, 2020 4:08 pm
randy331 wrote: Tue Feb 11, 2020 11:07 pm Today I picked a couple lobes for the 454 lsx I'm working on. I like to run my pick by some others I value an opinion from before ordering the cam.

Randy
Did you make a thread here asking for picks? :D
Would that be time well spent ?? :)

I decided to,...
Shut the valve sooner to trap more air!!
And calculate my "dynamic comp" to get it just right !!!
Run all the specs through a cranking comp calculator to make sure it is spot on !!!
Keep the ex valve shut later to help build more TQ !!!

There,.. did I leave anything out ?? :mrgreen:

Randy
Isn't the all important IVC what others use to figure DCR? Do the other 5 events even have a place air pump event?
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