darrinbrewer

iTrader: (1)

I've got my skunk2 Pro2s degreed in, and will be dynoing soon.

I have 2 settings, that are as close to what skunk2 recommends. +4ex,0in, and +3ex,-1in

which one of those settings will net me to most top end/peak?

its a drag setup, so it lives above 7000 all the time.
attached a screenshot of the degree table with my measurements for each setting.

engine setup:
74mm TB, sk2 ultra street 4Piston CNC ported mani, RDX injectors
CNC Ported head from RLZ
Supertech flat valves, springs/retainers
skunk2 Pro 2 cams
11.7:1 84.5MM wisecos on skunk2 rods
B20 block/crank
block was cut down to get rid of a scratch, head cut a little, so compression is probably 12:1 or so.
1320 big tube header, 3in exhaust

Chance EG

Generally speaking more advance = more top end. Obviously a dyno could confirm your settings.

Edit: Also, loving the parts list for your engine. Let us know what your results are.

darrinbrewer

iTrader: (1)

i dynoed it, outdoors, at 4500ft density altitude, and it was starving for air (this was BEFORE the 74mm and 4piston mani)
with a 68mm and a SK2 pro series manifold (it was pulling 3" of VAC all across the pull above 5k RPM

now that i changed the manifold and TB, it leaned out 7/10 of a AFR point up aboev 7000rpm(flowing ALOT more air), so i added fuel, and it now spins ALOT MORE hitting 2nd.
its in a 2400lb sedan, with PS/AC/CRUISE, full street car.
most dyno's i see making 225 at 7500 peak about 250-260, so im shooting for that.

vtecmaster85

Try using a victor x manifold or bigger cams

1HGEJ2

iTrader: (1)

The 2nd setting recommend tony from skunk2.

Chance EG

He said the dyno was before the S2 Ultra Street and throttle body. Pro 2 cams along with his setup is a perfect match.

vtecmaster85

Yea thats why i opted for something with plenum volume and shorter runners. Look at how early he peaks.

darrinbrewer

iTrader: (1)

that dyno was with the old pro manifold, no dyno yet with the 74mm and the Ultra street 4 piston mani.

vtecmaster85

Ah ok cool. I say try that and see what it does.

Chance EG

You're confusing the **** out of me. His setup right now is perfect. I would be interested in seeing what the new dyno/tune results are.