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Discussion Starter · #1 ·
Im looking at a quite a few hyd roller cam grinds for my 496 that going to be built. For those that dont know the combo here it is..

496
10.2 to 1
AFR 315's
Vic Jr
HP950 or HP1000
2"x3.5" headers
3" exhaust
TH400...10" Continental...should flash close to 4K behind 496

Grind 1....298/306....250/256.....636/655...110....I like this one

Grind 2....310/318....252/256.....627/636...112
 

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I like grind one also
 

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Damn your build looks familliar:D Grind 1 looks pretty good, but I honestly couldn't tell ya why it's better than 2, lol! Maybe cause it has a bit more lift I guess:D I'm curious what CStraub would have in mind for ya??? Cool build though:thumbsup:
 

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ron
is this a street car?
what hp goal?
what cruising RPM do you want to run ?

my HR is .6647/.6035 on 112

you may want to call CStraub and get it right the first time

i have morel lifters and trend pushrods all from Chris

billett is not necessary for a HR
you can save some cash with austemper core (per Mike Lewis & CStraub)
 

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Discussion Starter · #6 ·
Before I choose I will talk to Mike or Chris about it as well.
 

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ask about those heads as well unless you already have them
 

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Discussion Starter · #8 ·
ron
is this a street car?
what hp goal?
what cruising RPM do you want to run ?

my HR is .6647/.6035 on 112

you may want to call CStraub and get it right the first time

i have morel lifters and trend pushrods all from Chris
Rich.....Yes the car is mostly a street car that will see the track maybe 4-5 times per year. HP goal would be right around what your dyno numbers look like in your sig. My cruise rpm's are 2500-2600 or so.
 

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if mike said the 315s are good...THEY ARE!

Chris recommended 305s ...but then the 290s came out ..
i went with the 290s because i told Mike and Chris i wanted to cruise below 1500
( 5th gear in TKO 600)
my engine was the first one Mike built with the 290s and i think we are both pleased.
 

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Discussion Starter · #11 ·
if mike said the 315s are good...THEY ARE!

Chris recommended 305s ...but then the 290s came out ..
i went with the 290s because i told Mike and Chris i wanted to cruise below 1500
( 5th gear in TKO 600)
my engine was the first one Mike built with the 290s and i think we are both pleased.
I purchased a 468 that already had the 315's on it. I ended up selling that shortblock to do this new 496 build. My cars weight with me in it should be around 3600-3700 or so should not be to bad. Plus cruise rpm's with the GV put me right at 2500-2600 so most cams are gonna be happy.

I was really a thread on when you were tuning your PS HP1000 and you said you were getting 6.5 mpg just cruising. Did you ever get to improve on that number?? I might try the Holley HP850 street. I currently have the HP750 street for my sbc and it works great!
 

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You were talking Hybrid correct?
I would use that cam if it was a solid roller only.
Hydraulic roller I can see a valve floating monster, with those cam specs.
Crazy Davey runs Hydraulic Roller in that 502 but I think the specs are alot milder than the 2 cams you are looking at.

Dave
 

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315's are crazy good heads...I'm sure anyone would agree! Now alot of options with the new line up including the 290's & 265's...but I just can't see going wrong with the cubes in our range matched up with the 305's & even the 315's...with some growth later on, they'll still rock! I also remember Straub stating that the better flowing heads ya got, the less cam ya need to meet your rpm expectations! To be honest, I prolly would've went with the 305's but a deal came up where I got a new set of 315's for what the 305's cost...wasn't gonna pass it up!!! To say the least, IMO...the AFR line up is pretty impressive!
 

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Discussion Starter · #14 ·
Dave...Bigred L-72(Steve) is running a 252/252...660/660...111 Hyd roller with standard Comp lifters and flying. Low low 10's at like 132 or something. It was a UD harold grind. I am planning on running the same Comp lifters(already have some/killer shape).

Chad I agree...and hope lol. Someday I will build a nice 540/555 to really let these heads go to work! But until then they will put work in on the 496!
 

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Dave...Bigred L-72(Steve) is running a 252/252...660/660...111 Hyd roller with standard Comp lifters and flying. Low low 10's at like 132 or something. It was a UD harold grind. I am planning on running the same Comp lifters(already have some/killer shape).

Chad I agree...and hope lol. Someday I will build a nice 540/555 to really let these heads go to work! But until then they will put work in on the 496!
Wow thats working.
I am not a fan of hydraulic rollers, I guess with the proper valve springs it should work.

Dave
 

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Wow thats working.
I am not a fan of hydraulic rollers, I guess with the proper valve springs it should work.

Dave
Quite a few people pumping out VERY respectable HP/Tq/Track #'s with full HR/Hybrid setups, myself included. Some of us just want powerful STREET machines and go to the track just for fun. My dyno operator swore I'd never see over 550hp/tq with my hybrid setup: [email protected] HR cam solid Morel lifters and AFR 265's on a 496... 662hp and 637 on the tq had him pulling his foot out of his mouth. "Nice piece" he says.... LMAO
 

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Unless this is a max effort deal, don't see any reason for less than a 112lsa with a 4.25" crank. Need to decide where you want peak hp. 315's on a 496 won't need a lot of duration to carry peak hp to 6200. 555 Jim did had Dart 335's and a 254/258 on 112, fairly sure it peaked around 6200-6300. My 540 has Dart 310's w/ 2.30/1.88's, 10.3 cr. Left the cam small at 297/304,242/249,.650/.650, 112lsa/107icl. Peak hp should be at a low 5800 - 5900 rpm which should be a good match for the 3.42's and 3000 stall. Want to get the converter serviced while out of the car and debating on having it restalled couple hundred rpm lower to 2800. Point is, its real hard to not make good power with a 500" motor with good heads and even harder to set a power limit and stay within the plan. You really have to decide what it is you want. 600hp, 650hp, 700hp? 496 with 315's you can pretty much assume unless you really screw it up, you're looking at a minimum of 650hp. How much power is the car set up for? In your case, I'd verify the combustion chambers, get the short block built for the target cr and back into the cam specs as the build progresses. JMHO, both of those cams are wrong for the 315's. I'd be looking at a 4* split, .650/.650, maybe .650/.620, definitely more lift on the intake side to take advantage of those intake ports.
 

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Ron, you really need to contact a good cam guy before you make any decision. I like everything I have seen that CStraub has done. I will use him when I build a big motor eventually.

Personally, for what you are wanting to do, think both of those cams you listed are way too big for a daily street cruiser.....could you do it and them be livable? Ofcourse.....but I think you would be MUCH happier with some -10* int/exh then what you are thinking. Much better manners, handle AC and idling with no issues.

I just know how mine runs with a 238* hyd roller, and no way would I be happy with another 10-12* of duration while loafing around town with the AC on, idling in traffic etc....my motor already shakes my car apart and now I have crap squeaking/rattling everywhere inside the cabin.

Just remember what you use the car for the most and don't get caught up on big cam numbers. Those bad ass AFRs will make all the power for ya. Keep it street friendly like you have in the 408.
 

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Dave...Bigred L-72(Steve) is running a 252/252...660/660...111 Hyd roller with standard Comp lifters and flying. Low low 10's at like 132 or something. It was a UD harold grind. I am planning on running the same Comp lifters(already have some/killer shape).

Chad I agree...and hope lol. Someday I will build a nice 540/555 to really let these heads go to work! But until then they will put work in on the 496!
Just to add...it`s a 4/7 swap and the single pattern seems to work.

The car ran 10.05 @ 132 Mph in our 9.7-1 compression 496.

In our 534" pump gas 69 Camaro we used a UDHarold 255 @ .050 .650/.650 110 sep single pattern that car ran a spinning 9.96 @ 136 MPH weighing about 3700 Lbs

I`d use UDHarold...he`s been a stalwart around here for A LONG time !! His cams work.
 

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Discussion Starter · #20 ·
Thanks guys for the help! I wont make any dumb cam choices before either talking to Mike Lewis or Chris S. Mike will be buidling the shortblock and hope to drop it off within the next week or so.

Joe the drivetrain should be good to go for the power I would think.

Comp eng sub frame connectors
Caltrac bars
DSE multi leafs/Hotchkis front springs
TH400..upgraded sprag
GV overdrive
Currie 9"..31 spline alloy axles
HD driveshaft...1350 tranny side joint/1310 rear end side(wanna change that to 1350)
Poly engine/tranny mounts
 
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