one92rs

iTrader: (5)

1. 355 flat top pistons with valve reliefs
2. summit racing 162108 heads. 62 cc 2.02i 1.60 ex 170cc-in 69cc ex
3. edelbrock 3704 intake gasket matched and bores ported
4. cfm tech ported tbi 620 cfm.
5. hooker shorties and ypipe. high flow cat and magnaflow catback
6. 3.23 posi diff
7. built tranny with 1750 converter--stock.

ROLLER CAMS please. was looking at this one. but I want all opinions. idle to 5500 is my rpm range.

Camshaft Specification Table
Part Number 08-422-8
Engine -9999 Chevrolet
305ci-350ci
8cyl.
Grind Number CS XR270HR-10
Description
Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.495 0.502
Duration At 0.006 Tappet Lift 270 276
Valve Timing At 0.006
Open Close
Intake 29 61
Exhaust 72 24
These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 218 224
Lobe Lift 0.33 0.335
Lobe Separation 110
Recommended Valve Springs 986-16

one92rs

iTrader: (5)

what about this cam

howards cam

Brand:
Howards Cams


Manufacturer's Part Number:
181145-12


Part Type:
Camshafts


Product Line:
Howards Cams Hydraulic Roller Camshafts


Summit Racing Part Number:
HRS-181145-12




Cam Style:
Hydraulic roller tappet


Basic Operating RPM Range:
1,500-5,600


Intake Duration at 050 inch Lift:
219


Exhaust Duration at 050 inch Lift:
225


Duration at 050 inch Lift:
219 int./225 exh.


Advertised Intake Duration:
272


Advertised Exhaust Duration:
278


Advertised Duration:
272 int./278 exh.


Intake Valve Lift with Factory Rocker Arm Ratio:
0.510 in.


Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.525 in.


Valve Lift with Factory Rocker Arm Ratio:
0.510 int./0.525 exh.


Lobe Separation (degrees):
112


Camshaft Gear Attachment:
3-bolt


Computer-Controlled Compatible:
No


Valve Springs Required:
Yes


Camshaft Manufacturers Description:
Fair idle, good all-around performance. Good vacuum. Computer compatible with chip.

Fast355

iTrader: (2)

Don't know if they still have any available, but I picked up a Lunati version of the hotcam on closeout from Lunati a couple weeks back and it was under $90.00 shipped.

http://www.lunatipower.com/Product.aspx?id=2607

ownor

iTrader: (5)

i suspect the 270HR won't peak much before 5500, even though your intake runners seem about right (small enough) for the power band. what's your CR on this? 5500 is anticipated redline/shifting or..?
build plan dont sound too bad otherwise!

added: what are you doing for tuning?