Pandahatch

I'm trying to pick out a set of cams for my engine I'm getting all wrapped up. The car was previously a high HP N/A setup, and I went through and redid it all. The head is a B16 and was done by Brad at RLZ, I have 1+mm oversized intake valves in it which flowed 317cfm at .500 lift. I ran Buddy Club Spec IV's in it last time without a problem. I know bigger N/A cams are being used more and more with dialing out the overlap. The bottom end of the engine is an 85x87.2mm Dart block with 8.9:1 custom Ross pistons. FI setup is an Arizona Forced Induction top mount divided with twin 44mm gates and a GT4202 1.01 A/R exhasut side. I can get a set of Skunk2 stage 2's from a buddy of mine which have 12.4mm lift / 275 duration intake and 11.9mm lift / 270 duration @ 1mm. With the oversized valves would I want less duration and more lift like these cams. Any insight helps, thanks in advance.

Jared

why not stay with the BCs and see how it goes?

non-VTEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">why not stay with the BCs and see how it goes?</TD></TR></TABLE>

i agree.......and you can use a set of adjustible cam gears to dial in/out overlap as needed.

Pandahatch

I already sold those cams unfortunately, those came's have a listed duration of .306, which seems on the rather high side of what I want to use.

IN VTEC

iTrader: (3)

Toda C's then.

quicksilver1689

yeah i vote pro1's, people have had good success with them

Pandahatch

Nah, not trying to go into any class really, more just have fun with the car, I'll run it in heads up Friday night type deals, but nothing serious I don't think.

I've run the Pro 1's before as well, I realllllly liked them, I know I've seen the dyno charts on here for boosted cars. Would the Skunk2 stage 2 regular cams work well? They only have slightly more duration according to Skunk2, although the exhaust openign an closing degree differs a bit.

DaveF

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rota92 &raquo;</TD></TR><TR><TD CLASS="quote"> roller rockers

</TD></TR></TABLE>

ETA = 8 months

Pandahatch

Pro 1's

Camshaft Specifications:
Intake:
264°/12.6 @ 1mm / 0.000” lash
Exhaust:
264°/11.9 @ 1mm / 0.000” lash
Tappet Clearance:
Intake: 0.007” (cold)
Exhaust: 0.008” (cold)
Other Recommended Camshaft Specifications:
Intake:
Opening:
Peak Lift:
Closing:
24° BTDC
98° ATDC
50° ABDC
Exhaust:
Opening:
Peak Lift:
Closing:
56° BBDC
105° BTDC
17° ATDC

Stage II's

Camshaft Specifications:
Intake:
275°/12.4 @ 1mm / 0.000” lash
Exhaust:
270°/11.9 @ 1mm / 0.000” lash
103.0° Centerline
Tappet Clearance:
Intake: 0.007” (cold)
Exhaust: 0.008” (cold)
Other Recommended Camshaft Specifications:
Intake:
Opening:
Peak Lift:
Closing:
37° BTDC
94° ATDC
49° ABDC
Exhaust:
Opening:
Peak Lift:
Closing:
61° BBDC
112° BTDC
21° ATDC

GodFather of Boost

It has been shown on all-motor cars that sk2 tuner2 and bcIV cams have made similar power if not a little over the pro1s in vtec. Where the pro1s really stand out is in the low cam. But in a efficient turbo setup the crossover will most likely be set at 4500 or lower. So on a car that is primarily used for drag racing I don't see an advantage. if anything the less aggressive primaries on the tuner cams will cause less stress on the valve-train.


WARNING
this is only my theory I have nothing to back it up..... yet

dc2____R

s2s2 cams