800 Hp vortec 350 ci pump gas?

F1Fever · Post by **F1Fever** » Sat Jun 10, 2006 5:14 pm

The SB 2.2/434 thread got me to thinking about modifying that profile cam and running it in a 17.8:1 350 w/vortec heads. When I did my computer showed right under 800 Hp.
Using this calculatorI come up with 7.096:1 dynamic compression.

here are the cam specs:
LSA : 112
ICL : 112
Dur @50" : 280/296
Lift : .333/.333

I know it can't make that much power, and how could nearly 18:1 run on pump gas.
So I have to ask, what would a combo like that do in real life??

highVE · Post by **highVE** » Sat Jun 10, 2006 5:45 pm

Forgive me here cause i'm very lost!

.333" lift? Lobe or at the valve? even so, thats some sick duration with that lift. it will be the flatest lobe ever!

I love the Vortec head design. Both in stock form and the bowtie version. But i can't say it's provide enough intake port to acheive that power number out of 350 ci's.

18:1?? with only 350 iches, you'll need a massive dome, along with milling more than actually possible off the vortec heads. (thin decks) .

Try buiding (or thinking up) something a little more realistic

Mike

F1Fever · Post by **F1Fever** » Sat Jun 10, 2006 6:32 pm

Yes, a very short fat lobe, and that'd be 500 at the valve. I actually first had an idea of a 13:1 that made 550 Hp on the computer but when I saw that thread with the 434/sb2.2 and that cam profile...
So I know that compression ratio will be nearly impossible to achieve, but I'm really asking in a theoretical sense what would happen...what would the Hp and Tq figures really look like?

F1Fever · Post by **F1Fever** » Sun Jun 11, 2006 1:53 am

Well that was a $40 dyno program I bought, here's one I wrote:
http://hotroddersauctions.com/tech/ezonlinedyno.html

It shows about 470 Hp, that is much more realistic isn't it?

Wolfplace · Post by **Wolfplace** » Sun Jun 11, 2006 12:33 pm

F1Fever wrote:Well that was a $40 dyno program I bought, here's one I wrote:
http://hotroddersauctions.com/tech/ezonlinedyno.html

It shows about 470 Hp, that is much more realistic isn't it?

=
Personally I would try this site for a program, I think it is probably more productive,,

http://www.rcwebboard.com/forum/arcade/index.htm

Certainly more entertaining

crazycuda · Post by **crazycuda** » Sun Jun 11, 2006 2:36 pm

probably run on diesel fuel

F1Fever · Post by **F1Fever** » Sun Jun 11, 2006 7:55 pm

Diesel, LOL there's no way but you two are funny

I've built a couple of motors and usually impress people with my junk, but after I started seeing these computer calculators I started looking for that "oddball" setup that would really crank out the power.

F1Fever · Post by **F1Fever** » Fri Jun 23, 2006 8:09 pm

This thread is also to show that theory and real life don't always mesh.

johndougherty · Post by **johndougherty** » Fri Jun 23, 2006 8:23 pm

Im curious, what intake closing number did you use? I tried the program with your numbers and I get 11.1-1 dynamic.
Intake closing point using there idea of adding 15 degrees to the closing number ends up at 87 ABDC. Is this what you used?
or did you use 112?

280/2=140, 140+ICL(112)= 252, 252/180=72, 72+15=87

F1Fever · Post by **F1Fever** » Fri Jun 23, 2006 8:35 pm

(I was doing a lot of calculations and obviously got lost, thanks b/c i do feel a bit better about the DCR theory, but still yet not totally) LOL, buy the way, I used 114, not sure where I got that from...or that's what's in my notes?

Post by **ClassKing** » Sat Jun 24, 2006 1:22 am

Jim McFarland built a 17:1 Cr pump gas combo way back when - and even offered it in a kit. Didn't make any power worth a crap but it ran. Another excerise in futility. Someone here can probably point you to the article.