70mm TB on 10lbs

[4door89]

is it too much to put a 70mm TB on a ls/v @ 10lbs?

I have a skunk 2 intake manifold.... i could get that port matched...

Im only running 2 1/4 piping....

70mm = 2 3/4in

[daveedd357]

That size TB is not too large for your setup as long as you have the mods to support it. An engine will only need as much air as allowed by the head flow and camshaft selection. btw, what other mods besides ls/v and turbo are you running?

[siceclipse]

always leave room for upgrades in the future

[Ej1_203]

what is your fuel pressure set at?

[daveedd357]

what is your fuel pressure set at?

Tuning is always crucial

[sikciv666]

Tuning is always crucial

x12485784068468746346354

[tepid1]

Your not going to see a difference in power. So using the larger TB is pointless especially since the choke point is your piping.

If you were running a larger turbo which yields more flow then yes, a larger TB and piping would be necessary.

Keep it simple especially for that low power....

[siceclipse]

Your not going to see a difference in power. So using the larger TB is pointless especially since the choke point is your piping.

If you were running a larger turbo which yields more flow then yes, a larger TB and piping would be necessary.

Keep it simple especially for that low power....

to join in here, as far as I've always read, its always the best idea to try to keep all your piping the same size or as close as you can match it.

my I/C piping is 2.5 all the way thru.

[tepid1]

to join in here, as far as I've always read, its always the best idea to try to keep all your piping the same size or as close as you can match it.

my I/C piping is 2.5 all the way thru.

Yes and no.

Let me try to explain....

In a pressurized setup like this it doesn't really matter that much. Air will be there for the taking.

It is much more critical in an NA setup though or even a high HP setup like mine for example. I am at the threshold for max power and every little detail helps.

There are some theories that still apply. Smaller diameter = greater velocity, but the potential for more heat applies. Larger diameter velocity decreases, but flow increases and temps stay lower. There is a tradeoff and you need to find that point in your setup.

I personally run 3" aluminum tubing due to the fact that my turbo pumps 90+lbs of air and is making over 900whp now.

For most setups 2.5" is the desired size.

Remember that smooth flowing air is not always the best. If air was not turbulent then the fuel would not atomize correctly which would yield less power and would lose it's cooling effect on the combustion chamber.

[k20turboMOE]

for boost,the bigger the better,thats all there is to it,the smaller the tb is,the more air restriction,its that simple:p

[Alpinestar03]

sounds like tepid1 knows his shit.

[tepid1]

for boost,the bigger the better,thats all there is to it,the smaller the tb is,the more air restriction,its that simple:p

Actually too big can hurt you more than help.

sounds like tepid1 knows his shit.

I've been around the block a few times.... lol

[4door89]

Well, i also have a bored out h22 TB that is portmatched to the manifold.

Will a smaller/larger diameter charge pipe affect lag at all?

Im running a stock ls bottom, and a b16 head. 2.5 exhaust (for now), and thats pretty much it...

[daveedd357]

no. As long as the cfm of the turbo is matched to the piping size.

[tepid1]

That really depends on the size of the turbo and what it flows.

If you have a 3" charge pipe and a GT28R turbo then it may affect the building of boost.... (it will lag a bit)

If you have a GT42R and 3" then you won't see a difference because it flows a lot more.

It's all relative to the rest of your setup. You need to provide more info....