towing heads and cam question

[Kenneth Flippen]

What's your thoughts on these
http://shop.whiteperformance.com/SBC-CH ... -S-272.htm

Or the assault heads from kmj

I've got a 400 sbc in a square body 3/4 ton crew cab gonna tow a horse trailer with it its bored 20 over with 200cc dished pistons

Question on cam is my understanding a single pattern builds more torque but hurts gas mileage but what's the trade off how much mileage is lost and how much torque is gained I want all my power done at 5000-5500 rpm


Kenneth

[wyrmrider]

I do not know those heads but I do know that the weight savings of aluminum should not be a concern with your rig
200cc??
the head port volume or the piston dish?
what's your deck height
quench?
whose pistons? number?
do the pistons match the proposed head?
I run a Mike Jones cam in my ported head chevy small block, many years of service life
I had a stable with 130 horses so I know where you are coming from
doing it again with today's oils I'd think of a hyd roller- ask Mike
have your flow data available
also ask him about rocker arm ratios
what's your exhaust? mine's rams horns with 2 1/2 pipes

[randy331]

For towing with good MPG on a SBC, I'd look at the GMPP small port vortec bowtie heads.

I'd want to re-do the valve job and you'll need a dish piston with 400 ci for sure.

Randy

[PackardV8]

Yes, OT, since he didn't ask, but building a 3/4t crew cab truck engine to tow horse trailers; would a 400" SBC be our first choice today? Certainly wouldn't be mine. Love them for a budget performance build in a light car; not so much in a tow truck.

Just asking, given the variety of engines which would bolt in where a 400" came originally, what would others choose for similar $$$?

FWIW, one of the better 2500 swaps I ever saw was a 500" Cad and TH400. Dirt cheap, big low and midrange torque. Your results may vary.

jack vines

[CamKing]

I do not know those heads but I do know that the weight savings of aluminum should not be a concern with your rig

There's more to running aluminum heads, then the weight savings.
The aluminum heads will allow you to run more compression(about a half a point), without running into detonation issues.
I'd look at the Edelbrock Performer RPM E-Tec 170 heads.

as for cam design, I'd need to know what RPM the engine is at when you're cruising down the road, pulling the loaded trailer.

[wyrmrider]

500 caddy- good choice but if he needed real grunt for lot's of miles he'd get a diesel
vortec heads also- better than standard 64 cc heads-- where those in the picture fast burns or what?
google up those kmj heads- procomps?
not very stellar reviews- whose heads are the first pair?

[Kenneth Flippen]

Type error on the piston its 20cc dish long tube headers 1 5/8" 3" collectors

[swatson454]

I don't know... a 9:1, E-Tec headed, MPFI 400 with a hydro-roller that's 208/212 ish on a 108 could be worth looking into. I'm sure Mike would spread the lobes

Cruise along at 2,500 rpm, locked up in "D". Maybe?


Shawn

[Kenneth Flippen]

I do not know those heads but I do know that the weight savings of aluminum should not be a concern with your rig

There's more to running aluminum heads, then the weight savings.
The aluminum heads will allow you to run more compression(about a half a point), without running into detonation issues.
I'd look at the Edelbrock Performer RPM E-Tec 170 heads.

as for cam design, I'd need to know what RPM the engine is at when you're cruising down the road, pulling the loaded trailer.

I'm guessing 2000-3000 cruising

[CamKing]

If you went with the edelbrock heads, and 9.5:1 compression, and 1.5 rockers.
I'd recommend my Hydraulic Roller. Part# HR65327-67312-111
206/208 @.050"
.490"/.468" Valve Lift
111 LSA

[cv67]

Who the heck is doing their port design.

[CamKing]

Who the heck is doing their port design.

Who are you talking about ?

[Kenneth Flippen]

If you went with the edelbrock heads, and 9.5:1 compression, and 1.5 rockers.
I'd recommend my Hydraulic Roller. Part# HR65327-67312-111
206/208 @.050"
.490"/.468" Valve Lift
111 LSA

Whats the price on the roller cam and lifter combo
And what would it be on flat tappet cam and lifters


Kenneth

[CamKing]

Hydraulic roller cam and lifters, about $850
hydraulic Flat tappet cam and lifters, about $300

For a Hydraulic flat tappet, I'd recommend my part# H65295-67300-111, and put a 1.6 rocker on the intakes
204/210 @.050"
,472"/.450" Valve Lift with 1.6/1.5 rockers
111 LSA

[Warpspeed]

204/210 @.050"
,472"/.450" Valve Lift with 1.6/1.5 rockers
111 LSA

That is a very mild gentle cam, why would it even need rollers ?