will 2 inch intercooler pipes hold 400hp?

[dohctor_yaj]

I'm just wondering would the stock 2 inch intercooler pipes on a rb20det stand up to 400hp or would one need to go with 2.5 inches?

yes i know this is a rookie question...

I'm also thinking that if one wanted to go for only 350hp, maybe the rb20det would be a better choice instead of the rb25det because since one would still have to change the injectors, up grade turbo etc..., the rb20det is still cheaper off the bat....and 350whp with a LSD should give one into the low 12's shouldn't it with 2700lbs?

one last question, when pple say that the rb20det and sr20det blow off steam at 400hp, is that whp or fly hp?

[Projekt]

i've seen 1.5" pipe (maybe 1.75) on a car that made 426whp.

[dan240]

projekt, that's some serious hp on your car. Sorry if i didnt catch it earlier, but what car do you drive? and what's the setup?

[Projekt]

it's not mine, it's my friends Mx-6 with an FE3. it has a hybrid KKK K26 and 60(maybe 62)-1

[hannibal]

In Maximum Boost, Corky Bell says there's a maximum speed at which you want air to flow the the IC piping. I think that max was 450ft/sec.You can find the air speed in your system by dividing your flow rate by the area of the IC piping.I'll post the exact formula when I have the book in front of me.

Jay

[dohctor_yaj]

hey jay, how do you fine your flow rate?

the area of the diameter of the pipes right?

hmm....i'm just wondering if i should or NEED to step up from 2 inches if i wanted to go 350 to 400...

[Projekt]

area of the diameter is an oxymoron you can find the piping flow rate, and it would be in CFM. basically i wouldn't want it myuch lower than what my turbo is making.

[hannibal]

Dohctor yaj,

I was referring to a formula in Maximum Boost. Corky Bell says that flow speed should be less than 450 ft/sec.

AF=airflow in cfmPA=piping area (radius squared x pi)

AF x 144 -----------= flow speed (in ft/sec) PA x 60

Another formula is used to find air flow (AF).

cid=displacement in cubic inchesrpm=rpm at which flow is to be found (use redline rpm)VE=volumetric efficiency

cid x rpm x 0.5 x VE------------------------ = airflow (in cfm) 1728

Hope this helps...Jay