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Cam Choice for 454 BBC

G

GMC500

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hi

can you please guide me to choose a good cam for this application


I am gathering parts for a 454 BBC budget build for my k15

 the truck is 1986 GMC K15
14BFF + 10bolts >> 3.73 gears
SM465 + NP205
33" tires
total weight with 350 SBC is almost 5000 lbs ( more with the BBC )

454 truck motor from a mid 80s Burb ( + 0.030 overbore )
236 peanut port heads + oversized valves 2.19/1.88 + DIY porting
stock crank + stock rods ( with ARP bolts )
TRW L2399F30 pistons ( CR almost 9:1 )
Performer RPM intake ( square + spread pattern )
Performer 1407 750 cfm carb ( with offroad needle kit ) OR a Q-Jet carb
HEI dizzy with MSD module and coil ( MSD6AL is also available )
long tube headers + dual 2.5 exhaust + Throush glasspack mufflers

the truck is used in sand dunes + street + sometimes in the mud
and I want to retain the AC/PS/power brakes and be able to use cheap low octane fuel

also I don't want to spend a lot on the valve train since I am not going to wind it past 5500 RPM


which one do you think is more suitable for this application ?


http://store.summitracing.com/partdetail.asp?part=CCA-11-242-3
Comp Cams XE268h
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Duration: 268 int./280 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.515 int./0.520 exh. lift
Lobe Separation (degrees): 110


http://store.summitracing.com/partdetail.asp?part=CCA-11-246-3
Comp Cams XE274h
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Duration: 274 int./286 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.552 int./0.555 exh. lift
Lobe Separation (degrees): 110


http://store.summitracing.com/partdetail.asp?part=CCA-11-239-3
Comp Cams X4 270H
Duration at 050 inch Lift: 226 int./234 exh.
Advertised Duration: 270 int./278 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.544 int./0.564 exh. lift >> too much lift ?
Lobe Separation (degrees): 111


http://store.summitracing.com/partdetail.asp?part=CCA-11-207-3
Comp Cams Magnum 270H
Duration at 050 inch Lift: 224 int./224 exh.
Advertised Duration: 270 int./270 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.510 int./0.510 exh. lift
Lobe Separation (degrees): 110


http://store.summitracing.com/partdetail.asp?part=CRN%2D10306&view=1&N=700+
Crane Cams 10306
Duration at 050 inch Lift: 228 int./228 exh.
Advertised Duration: 284 int./284 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.544 int./0.544 exh. lift
Lobe Separation (degrees): 112


http://store.summitracing.com/partdetail.asp?part=CRN-10307
Crane Cams 10307
Duration at 050 inch Lift: 226 int./226 exh.
Advertised Duration: 282 int./282 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.533 int./0.533 exh. lift
Lobe Separation (degrees): 108


http://store.summitracing.com/partdetail.asp?part=CRN-10305
Crane Cams 10305
Duration at 050 inch Lift: 216 int./216 exh.
Advertised Duration: 272 int./272 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.515 int./0.515 exh. lift
Lobe Separation (degrees): 110

http://store.summitracing.com/partdetail.asp?part=sum-1302
Summit Racing 1302
Duration at 050 inch Lift: 228 int./238 exh.
Advertised Duration: 286 int./296 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.540 int./0.540 exh. lift
Lobe Separation (degrees): 114


http://store.summitracing.com/partdetail.asp?part=LUN-60203&autoview=sku
Lunati VooDoo 268
Duration at 050 inch Lift: 227 int./233 exh.
Advertised Duration: 268 int./276 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.542 int./0.554 exh. lift
Lobe Separation (degrees): 110


http://store.summitracing.com/partdetail.asp?part=LUN-60202&autoview=sku
Lunati VooDoo 262
Duration at 050 inch Lift: 219 int./227 exh.
Advertised Duration: 262 int./268 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.530 int./0.542 exh. lift
Lobe Separation (degrees): 112

sorry for the long list

your suggestions is highly appreciated

thanks

Ahmed
 
Last edited:
First thing I'd do is ditch the Performer RPM intake and go with the Performer intake instead. The RPM version is for a higher RPM range and is too big for your heads and cam, especially staying below 5500RPM.

I'd go with a Comp cam with somewhere around 510-525* lift. I wouldn't get too big, because you don't have the heads to flow for a 550* range cam, or the valvetrain to handle higher RPM's where it will benifet the most.
 
rjfguitar said:
First thing I'd do is ditch the Performer RPM intake and go with the Performer intake instead. The RPM version is for a higher RPM range and is too big for your heads and cam, especially staying below 5500RPM.

I'd go with a Comp cam with somewhere around 510-525* lift. I wouldn't get too big, because you don't have the heads to flow for a 550* range cam, or the valvetrain to handle higher RPM's where it will benifet the most.
Click to expand...

OK
this is the Performer
http://store.summitracing.com/partdetail.asp?part=EDL-2161&autoview=sku
and it has both Square & Spread Bore and cheaper :D

what cam of the above would you recommend

thanks
 
Call up Craig Artzner at Summit. He can do for you what he did for me. 3 way call with a tech rep that can keep you aimed right for your application. You might even find a cheaper alternative.

18002303030 I think is the number.
 
hmm cam choice

well i also have a 454 bbc and i run 9.0-1 compression with the comp cam x270h cam and love it i have 081 heads (i think or the 049 heads )it is very streetable and lots of power the only other thing i had to do was put a 2300 stall torque converter in and i run all my vacuum accesories and brakes and i run the performer rpm air gap intake which is good from 1500-5500 rpm and i have lots of torque from bottom all the way to the 5800 limit :D
 
shaggy7481 said:
well i also have a 454 bbc and i run 9.0-1 compression with the comp cam x270h cam and love it i have 081 heads (i think or the 049 heads )it is very streetable and lots of power the only other thing i had to do was put a 2300 stall torque converter in and i run all my vacuum accesories and brakes and i run the performer rpm air gap intake which is good from 1500-5500 rpm and i have lots of torque from bottom all the way to the 5800 limit :D
Click to expand...

do you mean the Extreme 4x4 270 grind or the Magnum 270 ?




BoondocK5

do you know his E-mail address ?
I am not from the US and international calls here are expensive


thanks a lot
 
cam choice

i meant i run the 4x4 extreme energy cam and love it and that one specs at this
Chevy 396-454ci Big Block 1965-96

*Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.
Best with improved intake manifold, needs headers, 2000+ stall converter and 3.55-3.90 gears. Operating Range:1600-5800 RPMDuration Advertised:270° Intake / 278° ExhaustDuration @ .050'' Lift:226° Intake / 234° ExhaustValve Lift w/1.7 Rockers:.544'' Intake / .564'' ExhaustLobe Separation Angle:111°
 
engle, part number 2212h excellant cam for a peanut port 454. had this cam in my 30ft motorhome, had to change the cam becasue an oil pump problem that casued the cam to go flat. put a comp 268h in its place and the pwer was nowhere near the same. i am putting a newer engine in my 73 crewcab and am putting the engle cam in it before i install the engine int he truck.
 
I vote Lunati, I hear they are the best. Thats the brand I'm going to use whenever i end up doing a cam.
 
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