RHS heads

[toddcalo]

larry how heavy was that car ?

[maxracesoftware]

larry how heavy was that car ?

very marginal Street Car, but driven everday to Work,
Louisiana State Inspection Sticker
1979 Camaro 2950 Lbs w/Driver
with M/T Slicks 31x10.5W on 10inch wide Rims x 15dia
Marv Ripes A-1 Converter 8inch 5200 Stall
4.56 gears Custom made Headers 2.000 Primaries 4.000 Collector
Powerglide 1.76 1st


Dyno Date=> April 14,2001
Chevy SBC 4.165 x 4.000 = 436 cid
Regular Chevy 400 4-bolt 400 block
Eagle crank and 6 inch rods
JE pistons -16 cc dish pistons 10.3:1 CR
Ancient pair of cast-iron World Products i maxed ported with 2.100/1.600
GM Bowtie alum intake manifold w/2 inch Moroso adapter
MSD crank trigger / distributor
Comp Cams belt-drive
Moroso alum Stage 2 Comp oil pan 6 qts. Valvoline 50 wgt
1.60/1.60 Cam Motion rockers w/Comp Cams stud girdle
Holley HP-1250 96/97 jets
Headers = 2 inch primary x 34 4 x 20 collector
Moroso vac-pump
165 cranking PSI on number 1 cylinder after 8-to-10 pulses
38 deg btdc
.025 lash
new Cam Motion R2764-2832-10 274.5/287.3 .73625/.70803
set lash to .035/.035

SF-901 Dyno at 600 RPM/SEC
652.1 Peak HP @ 6700
569.5 Peak TQ @ 5300

First time out State Capitol Dragstrip - Baton Rouge , LA
June 1, 2001 Friday night Race at 8:42 PM
1.371
3.937
6.107 at 113.27 MPH
--- No 1000 Ft Time on ET Slip
9.593 ET at 139.42 MPH

this was with maxed out cast-iron World Products Heads 2.100/1.600


a Month or so later sold those World Products Heads and
re-Dyno tested with new Dart Pro 1's with mild Port Job,
2.125/1.600 valves, everything else the same
this time with 10.8:1 CR made =>
679.1 HP @ 7100
563.3 TQ @ 5100

ran later in heat during August
9.58 ET first run
then best run 9.53 at 141+ MPH

[maxracesoftware]

Are the RHS Pro Action sbc aluminum heads a descent head. I am considering the 200cc version for an 11.1 compression 383.

this Dyno Test Data is from a 401 SBC with supposedly
out-of-box RHS alum Heads

its the closest Engine size i could find Dyno Data on
for aluminum RHS SBC Heads around the 500 HP level
on Pump Gas

July 28, 2007 SBC 401.0 CID = 4.125x3.750
RHS alum Heads out-of-box
Moroso steel 8 1/4 kickout pan w/7 qts oil
Hurrican alum Intake
1 3/4 Headers
Rattler Balancer
Pump Gas
10:1 CR
Dart Block
32 BTDC
CS4009N/4003S R108.0 254/260 .631/.630 .421/.420
ProForm 750 Carb 1 inch 4-hole spacer

add on collector for 25 inch total from 8.750 stock collector

600 RPM/SEC

497.9 Peak HP @ 6000
474.3 Peak TQ @ 4500

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