intake manifolds

[rockvillespeed]

ok, someone step up.
who's got flow #'s on a oem syty intake?
if no one really does, and someone has both an intake and a good bench, i'd pay to have a hole flowed.
everyone bandies round head numbers; i've posted before and looked but never seen any info on intake numbers.
weakest link in the chain theory.
thanks
mike

 

[TurboManiacal]

You find some stockers and you can use mine (gonna get port matched & welded for vortecs) as a comparison when Renz gets done with them.

 

[Lynn D. Brown]

mike,

U might check w Jerry McCoy of McCoy motorsports, one of our sponsors. He redoes the stock IMs' for performance use. I would think that this stock IM is pretty good - alot better than the stock GN/TTA IM's. It is much bigger for one thing, and the huge entry space should make for pretty good distribution to the individual cylinders.

I would think it is one of the last things that U would replace in a major buildup. I checked on doing something different on my builup, and I was told that a custom sheet metal unit build would be $2000.+

If U R going that far, I understand that Mike of Race Proven motors can make one 4 U.

 

[100in6]

i remember talking to jim stokes once about mine and i seem to remember him telin me that about the best you could get the stock system to flow was about 255.

 

[jwaller]

I've heard ~255 from a stock intake ported to match a vortec head.

but If your willing to pay I've got a vortec intake and a stocker and a flow bench.. so lemme know

 

[Lynn D. Brown]

But the ported Vortecs don't flow any more than that - 255- do they ?

 

[100in6]

OK...I'll try to give this a try and explain why everyone wants to use vortecs and have them machined to flow as much as they can when the inake is the limiting factor. besides the flow numbers the vortecs are so much better of a head design that not only will they flow better than the stocks or L35's, but the combustion chanber is SO much better that it allows you to run much better A/F ratios and not ping the engine to death doin it. the stocks are horrible in that regard. I'm not sure if the intake flow numbers above 260 help that much if the intake is truly maxed out, but I have a couple of theories.

the exhaust numbers just kick ass compared to the stock or L35's, and it's the exhaust that get the turbo spinning. I have a pte 72 and I hear people talking about not getting the bigger turbos to spool quickly. only makes sense that if you can get bigger flow on the exhaust its gonna spin the turbo quicker and harder and thats where the horsepower is on these things. also, I think people that live and die by flow numbers may not be lookin at the whole picture. think POWER not numbers. the only numbers that really matter are the ones printed on the little piece of paper that the kid at the end of the track hands out

 

[rockvillespeed]

i'm not looking to replace it - i just wanna know.
if the oem isnt gonna keep up with the ported heads i have to bolt on, it'll get cleaned up till it does - i just wanna know if they''re int he ballpark.
i believe it's a decent piece, relatively speaking - my guess is it's not TOO far off from where i want ti to be, but again, guessing means shit.
my heads arent nuts - but a good bit better tehn stock.

 

[JSM]

I did some testing when I constructed the sheetmetal intake.

As I remeber, the stock intake heavily ported maxed around 220-230ish when the head used in the testing would flow more than that. (it was also heavily ported)

#'s though can be deciving, as each bench and operator can get different ones. The main thing I got from it, was the stock did hamper flow at the higher flow rates, although not a ton, and probably not worth it for most to go to something else.