extremeracer

I know cam selection can be a dark art, with many variables. My setup is as follows:

2.0 LS/VTEC
84x89mm
9:1 CP with upgraded pins
Eagle Rods with L19 rod bolts
Sleeved
GSR main cap Girdle
ARP's

B16A head (mild clean-up)
Supertech Valvesprings + Ti Retainers (SPR-H100DR 85 lb)
Supertech Valves +0.5mm
Crower 63401T-2 cams
Stock B16A intake manifold

Holset Super HX40 (69 lb/min)
1.25" diameter twin scroll manifold
3" downpipe and full exhaust

E97
1600cc injectors
Full blown dual hanger with 2x DW 300 pumps
Upgraded fuel lines

The car has made 540whp on a Dynapack at 22 psi at 5500 ft elevation. Power did not increase past 22psi.

I now want to change the cams and intake manifold to increase power to around 650whp. Options I'm considering:

GSC T1
Skunk Tuner 2's
BC Stage 2 (NA cam)
CTR's (although hard to find a decent set)

Victor X intake manifold

Please help

mar778c

iTrader: (1)

OP,

Are you sure your turbo is capable of 600+ whp? You seem to be right at the limit. Can you post the boost plot.

Turbo-LS

iTrader: (4)

Those turbo cams aren't helping but at that elevation you seem to be close to be limit of your turbo. Cam upgrade might help some but not a whole lot.

Tuner 2's don't do well with boost. Stage 2 be an cams I would bother with. Go with skunk2 tuner 1's or gsc t1 cams if you are going to replace yours.

extremeracer

I will get the boost plot from the tuning shop

When you guys say I am close to the limit of the turbo, do you mean airflow vs PR required or something else ?

The Turbo's compressor map shows that it can support +- 65 lb/min even at a PR of 4

Thank you for the replies

mar778c

iTrader: (1)

The air flow number you are quoting is at elevation and std conditions. By my estimation, you are at 60 lbs/min which is the limit at your elevation.

extremeracer

So in other words 69 lb/min is at 0 elevation, at my elevation the air is +- 15% less dense so the airflow number drops by 15% ?

Is my understanding correct ?