denchan350gt

iTrader: (4)

The right mine is ported way more than that. I'll post pics of my collector next to stock and dyno later tonight.

taywan

iTrader: (53)

nice, good looking stuff

mgrotel

iTrader: (3)

ill be moving the flange so when the cutout is open it will flow straight through

mgrotel

iTrader: (3)

if anyone has any flowbench info on any or all of the available intake manifolds, please post some numbers for the benefit of me and anyone else who may read this and find the info useful

Zazz93

iTrader: (2)

Cosworth says theirs flows at 408 on the intake which is roughly a + 19% improvement on stock (per their website). I think their popular engineer mentioned a Cosworth Indycar head flows at 412 or so.

mgrotel

iTrader: (3)

thank you sir

mgrotel

iTrader: (3)

as im looking around, i am finding na guys losing power in low to mid ranges but gaining only a tad bit up top with less power dropoff with a cosworth intake manifold. since the cosworth flows quite a bit more air than stock, i am wondering if that extra flow capability of the cosworth has an impact on the velocity of the air moving through the intake, which in turn affects the low to mid range negatively. kind of like having too big of an exhaust and losing velocity.

but then as you get into the upper rpms, the velocity is better in the cosworth since the motor is pulling more air

any thoughts on that?

mgrotel

iTrader: (3)

could you link me to that? im not seeing it on their website. i believe you, i just would like to read more about it

edit: i see 19% increase on the heads, i was asking about the manifold

denchan350gt

iTrader: (4)

here are a couple of pics of the manifold.

The blue is with 5/16 spacer and stock lowers

The red is with a 1/2 spacer and ported lowers with a stock top






here is the thread about the intake on driver.
http://g35driver.com/forums/intake-e...-manifold.html

mgrotel

iTrader: (3)

Thanks, I'm guessing most of that power increase came from the porting on the lower plenum, not the collector, but it looks good

denchan350gt

iTrader: (4)

He thinks most of it is coming from the collector due to the fact MREVs are modded non-rev plenums and show little gains on a non-revup.

MREV on a non-revup with spacer do not show gains in the upper rpm like that hence the reason only a spacer is needed for a non-rev.

No one really touches the lower collector.

Also just switching from a 5/16 to 1/2 do not show topend gains like that either. The lowend and some of the midrange is the same as the 5/16 until 4500.

mgrotel

iTrader: (3)

have you considered smoothing it more like this, for example, smoothing out the casting letters in the valleys?

mgrotel

iTrader: (3)

read that thread on driver, very interesting

mgrotel

iTrader: (3)

got my heads

mgrotel

iTrader: (3)

and does anyone have a reference for the cam id markings on the bc stage 2 cams?

mgrotel

iTrader: (3)

ok, either i am completely retarded or i have a mismatched set of cams. in the pic below, the ones on the left were the stock ones that came out. on the right are my bc stage 2 cams. i know there is a short and a long head, but it seems like i have 3 cams that would fit the long head and one that would fit the short head. am i losing my common sense or is something mismatched here?

edit:

mgrotel

iTrader: (3)

bump, anyone?

Zazz93

iTrader: (2)

Your two short sticks look like they go to another engine. I'd return the set and ask for another full set.

mgrotel

iTrader: (3)

turns out i had 2 long intake sticks, sent one back should have a short intake by next weekend

mgrotel

iTrader: (3)

ok, im am ready to start putting it altogether, please list anything that i need to know what wont be in the fsm, things like

putting lube on head bolts to ensure proper torque
where to apply lube on the cams
what liquid gasket to use for timing covers
getting head to block surface very clean to prevent blown gaskets
etc.

i plan to take my time doing this, but just dont want to miss something that would be common sense to others.

thanks