Here is some 3rd gear rpm acceleration data that i have recently collected with my fp-grn using a ported oem intake vs. weapon-r intake, while using gsc s1 cams + other acceleration data from various mods that i have had on my car over the last year or so.

i installed a weapon-r intake, it makes more power, tuning is definately required to get similar transient drivability / response...but it did make more power for me, ~15whp more from 4300revs on up.

i am still running the oem licp with the fp-grn set-up....i plan on making another licp that does away with the oem discharge tube....so hopefully spool up should improve a bit.

i dont want to post my calculated whp numbers, for fear of a flame-fest, so i decided to post rpm data acceleration data & power delta graphs...yeah, no decent 1/4 mile tracks near-by, so no trap speeds...sorry.

all whp data is generated via aem, based on car acceleration...all runs were performed with similar ambient temps, fuel load & on the same road, traveling the same direction.

all runs are with the following mods + the corresponding mods in the graph.

65mm tb, ported exh man, ported hotside, 3" custom dp, custom licp, turbo xs fmic, test pipe, 880cc pte, aem ems

cam gear settings are what worked best for me:

s1 @ -2/-1
hks 280 @ -3/0
hks 272 @ -2/-1

enjoy

 

Hmmm, so it looks like an intake with velocity stacks and bigger plenum does create more power than the OEM intake. Who woulda thunk it.

 

nice.....

Not info people see everyday, how was the quality of the intake mani

 

hey aby,
how much of a hassle is it to get this setup to work with all the stock lines that hook up to the stock intake?

 

the intake was ok, i went aheald & rewelded (actaully a friend of mine did the welding), along all the seams where the welds were ground away / polished.

i had to remove some welding flash inside every runner to airhorn section.

you need to bend your oil dipstick tube to make fit...that took the longest time...damn, i removed teh oem intake in less time than it took me to get the dip stick tube bent the way i wanted it!!

i also had to trip about 1/2 off the oem uicp rubber piece thaat connects to the tb....i am still running a large oem battery.

i suggest getting heater core extension lines, as the oem water lines run very close to the plenum...i dont want any heat transfer from theose warm lines.

 

Hey if you decide to get rid of it to test something else let me know.

thanks
josh

 

I am surprised this thread hasn't blown up since some out there have said there are little to no gains going from a ported OEM manifold & 65mm TB to one like the Weapon-R or Magnus.

 

it's hard to talk when there's a foot in one's mouth

 

interested in seeing pictures of the weapon-r manifold installed. good job on the testing data!

 

nice comparisons, the more of these the better

 

Great job Aby!

 

I know, personally, that I trusted the opinion of someone who built/tuned race engines on a high level (ALMS, IRL, CART) for a living who said there would be gains

 

i painted the intake black, for the oem-ish affect

 

Would it be asking too much to post one simple graph?

OEM Intake Manifold VS. Weapon R Intake Manifold

 

^ of what, calcualated power or the rpm traces?

the graph on the right just has 3 traces, mani differences & tme vs fp-grn differences. that graph also has the power differences too, using the same axis as the boost trace.

just ignore the bottom powere trace of the chart on the right.

the differences between boost control was oem ebc on oem intake vs gm solenoid on weapon-r