427 coming along

[Pete]

Originally Posted by XfireZ51

Pete,
my point and I believe Todd's point is how interrelated port flow and cam timing events are. In the effort to optimize/maximize the results,
(and this isn't new stuff) the cam needs to take maximum advantage of the airflow made available through the induction system and the heads.
Too many times people choose the cam first without much regard to the cylinder head design and flow characteristics.

Dom, don't get me wrong i think most understand it's the whole combo to a good power plant.

I would like to find the best cam and head combo but with the LT5 it gets a bit expensive to try different cam and head/intake combos.
This is why we make do with what we have.

I have tried a couple of different cam spec combos on my Z and i think i have found what seems to be the best,i'm sure there could be a better combo, but man does it get expensive after a while.

For what it's worth getting 550-600RWHP N/A on pump gas,very docile
handles great and a top speed of 200+ is not too shabby for a 415-441ci.
I know that other engines can accoplish the same and cheaper,what i'm trying to say is with the amount of research and parts available for the LT5 we are doing pretty darn good.

Maybe if i win lotto i can try some more combo's
Pete

[Demps]

Pete, I chose the cams I have on your advice.

I wish I were experienced enough to comment on y'all's specifics. I do have a car torn apart putting on coilovers though.
Ted

[Pete]

Originally Posted by Demps

Pete, I chose the cams I have on your advice.

I wish I were experienced enough to comment on y'all's specifics. I do have a car torn apart putting on coilovers though.
Ted

Ted, hope your happy with your set up.

Todd, has done alot of homework he made sure he dot his i's crossed his t's and it will show.

Pete

[XfireZ51]

Originally Posted by Pete

Dom, don't get me wrong i think most understand it's the whole combo to a good power plant.

I would like to find the best cam and head combo but with the LT5 it gets a bit expensive to try different cam and head/intake combos.
This is why we make do with what we have.

I have tried a couple of different cam spec combos on my Z and i think i have found what seems to be the best,i'm sure there could be a better combo, but man does it get expensive after a while.

For what it's worth getting 550-600RWHP N/A on pump gas,very docile
handles great and a top speed of 200+ is not too shabby for a 415-441ci.
I know that other engines can accoplish the same and cheaper,what i'm trying to say is with the amount of research and parts available for the LT5 we are doing pretty darn good.

Maybe if i win lotto i can try some more combo's
Pete

Pete,

The Vizard article was about exactly the issue that you raise. You can try many camshafts with a given set of heads to try an find the best combination, but as you state, that's a very expensive proposition even if you're doing a vanilla SBC. When I did my 84, I used a company in New Mexico called Motors and Machine which was highlighted in the Vizard article. They had a software package based on Vizard's specifications for cam selection. It was $40 to have them calc a cam based on airflow measurements for the cylinder heads you had chosen. Besides that they wanted to know the operating range of the motor and where you were interested in having peak power occur along with calc'd CR.
They sent me a spec for a cam fitting those requirements. Be interesting to see what the calc'd cam spec would be for the LT-5 with "X" airflow numbers.

[Polo-1]

I think the little 402 will fire up before the 427

[Jagdpanzer]

Looking good Kevin!
Like the head studs and coated pistons
How long before it's alive?

[Dynomite]

Originally Posted by Polo-1

I think the little 402 will fire up before the 427

That is a beauty

Where do you get those head studs?
I am assuming ARP automotive?

[Polo-1]

Liners and Studs from Ron Woods.

[Dynomite]

Originally Posted by Polo-1

Liners and Studs from Ron Woods.

Is there a web site?

I can tell I am going to have to get one Z to drive and one Z to modify

Originally Posted by Dynomite

Is there a web site?

I can tell I am going to have to get one Z to drive and one Z to modify

I've got a spare motor we can build if you want.