70k10tpi

Ok guys im building a 406 for my 70 k10 i have two tpi manifolds in the garage new 30lb injectors, ecm, wireing harness ect. Everything i need to make it efi. Ill be running 33" tires and have 3.73 rear gears. The basics of the build are going to go as fallowes 180cc aluminum heads 2.02,1.60 fordged internals, going to be a full roller motor with the comp cams ex264hr cam. Now the question is can i get it to make power up to 5k with a ported penelum, base, and slp runners?i mean as heavy as the truck i love the idea of the tpi and 406 for low end tq but id still like to make power to 5k. Any thoughts? Any one running a similar set up in their car and do you like it?

70k10tpi

O i forgot to say cr is going to be 9.5:1-10:1 havent decided witch is the best opion yet.

five7kid

iTrader: (14)

Should.

Keep the CR to the lower number.

70k10tpi

I was thinking that. Running 9.5:1 right now on my 350 no problems with cast iron fulie heads. A motor built probably 25 years ago by my old man. Thought with the aluminum heads id might be able to bump it up a little as the aluminum disperses the heat better and expands a bit not making as much power as a equivalent cast iron. But i defiantly know 9.5:1 is safe and its a truck so thats probably the best route.either way the intake is my main concern. Is the ported tpi the way to go for a heavy 4x4 or was looking at a edelbrock pro flo xt manifold. Its a daily driver right now with quite a bit of offroad use,mud, hills, trails. Just looking for a happy medium i guess as i font need it to rev to 7grand but would like to see power to 5.

70k10tpi

*as i don't. sorry for the miss spell.

vetteoz

iTrader: (13)

Pick your poison

http://xtremecarzone.com.au/index.php?showtopic=386

70k10tpi

Yeah you're right. I should have worded that a little better. I know ill lose some bottom end to make power up top looking more for a happy medium . I guess worded a little better is can i get a max effort ported tpi to make power up to 5k on a 406sbc. Really not looking to make power past that.

vetteoz

iTrader: (13)

As per the link any long runner setup is not going to make power up top but is going to have awesome bottom end torque.
With truck gearing, I suspect you will be pulling the tread off the tires every time you put your foot down

70k10tpi

Yeah i caught that link after i replied sorry. Yea ive seen that article before and also one called tpi l98 stealth mode as&m runners and extrude honed base from chp magazine putting out some impressive numbers. If i could make the same hp at the crank they are with the ltr/ported setups they ran id be more than thrilled. Looks like most of them cut off at right where id like,just a little leery of magazine numbers vs real life numbers.

vetteoz

iTrader: (13)

Granted but in this case they are not pushing one advertiser products like most mag builds and from posts on forums the results seem to fair
accurately represent real life results
If nothing else they serve as a good intake vs intake comparison ;given they were all done by the same people on the same equipment
Take away the numbers and just compare the graphs to see where each performs ( and dies )

scoflaw

iTrader: (2)

That's not enough gear for a heavy truck with 33's I've got a 5.3 ls in a 2200# wrangler with 31's and 410's and it feels just about right.

70k10tpi

Yeah i know but when its already screaming like a banshee going 55 i cant do much till i get a overdrive or a new daily driver. This is eventually just going to be my toy but for now i want to keep where i can drive it. The 3.73s are way better than the 3.08s it came with even picked up on the top end. But when i put in a over drive i was thinking 4.10-4.56 range.

70k10tpi

Yeah thats apretty good point and a very good idea on the graphs. I think ill compare the graphs like you said side by side. Thanks for all the input.