BBC Hyd. Roller cam? - Chevelle Tech
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  #1  
Old Dec 7th, 12, 7:55 PM
70chev10 70chev10 is offline
Nick
 
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Default BBC Hyd. Roller cam?

Hi guys, Im currently building a Big Block for my 70 chevelle. My issues is cam choice, Im thinking hyd. roller, I do not want flat tappet. I hate the break in procedure and oils that are needed. I like the thought of hyd. roller, set it and forget it. Solid roller i know would make more power but requires maintenance. My car is street driven, a weekend toy if you will. I currently have the bottom end built, its a 4 bolt main 454 .30 over eagle rotating assembly. 10.5 pistons free floating wrist pins. they are forged set up. Im am going to be running aluminum heads prob. 320cc/119 combustion chamber. Sorry if this has been asked a thousand times already, it can get tiring to sift throught the endless BBC combos. I figued this would be perfect to ask you guys giving that the same weight and set up can be factored by guys on here. I really want a healthy running engine, something street/strip minded. Also I have 3:73 gears and a TCI breakaway torque converter. Im not concerned about fuel economy either. Any advise I would appreciate. Thanks
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  #2  
Old Dec 7th, 12, 10:02 PM
GRN69CHV GRN69CHV is offline
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Joe
 
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Default Re: BBC Hyd. Roller cam?

What make heads? 320cc on a 454 can make for a soggy low end if over cam'd. How hard do you want to spin this? What manners?

PS. May want to post this in performance
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  #3  
Old Dec 7th, 12, 10:30 PM
70chev10 70chev10 is offline
Nick
 
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Default Re: BBC Hyd. Roller cam?

Some of my concerns are what you are saying with the bottom end falling flat. I dont want to over cam it. Its a street driven car so I want to rip it around and play with it, but I also want to know that I can race it and it can run up 6500 if I want and still make power. What do you think about a Comp Cams Xtreme Energy XR282HR? I want to know that I am using the potential of good heads. Thanks for the input
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  #4  
Old Dec 7th, 12, 11:04 PM
bowtie468 bowtie468 is offline
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Joe
 
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Default Re: BBC Hyd. Roller cam?

Hey sounds like a good combo, although the 320 ports may be just alittle big for a hyd rollers RPM range. I would look up Chris Straub on this site, he has done several solid and Hyd rollers for me. He is a sponser on this site and his stuff works !!!
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  #5  
Old Dec 7th, 12, 11:12 PM
482 ZL1 482 ZL1 is offline
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George
 
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Default Re: BBC Hyd. Roller cam?

Hi Nick
The best people to talk to are UD Harold Ph- 662-562-4933 haroldbrookshire@panola.com and or Chris Straub cstraub@straubtechnologies.com Ph- 423-391-7774
Give them a call and thay will grind you a custom cam for your specific application.
PS: I think the 320cc heads are to big for a 454 for a weekend toy there are some awsome oval port heads that AFR make if thats in the budget!
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  #6  
Old Dec 7th, 12, 11:22 PM
692envy 692envy is offline
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Blake
 
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Default Re: BBC Hyd. Roller cam?

I'd suggest talking to Mike Lewis (wolfplace) or Chris Straub (cstraub). They have seen and done so many bbc combos they know what works and what doesn't. It's all about the combination.
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Straub Hyd roller
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  #7  
Old Dec 7th, 12, 11:23 PM
70chev10 70chev10 is offline
Nick
 
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Default Re: BBC Hyd. Roller cam?

Thanks guys
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  #8  
Old Dec 7th, 12, 11:34 PM
kettbo kettbo is offline
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George
 
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Default Re: BBC Hyd. Roller cam?

filler, re-do in progress

originally said, this thread in PERF and Engine, MIKE merged them

OK, PLANNING BIG runner heads?
Back in the mid 70s after myself and others had tossed many oval port heads, smart people determined OVAL port runner volume was more appropriate to 454 cid engines. So you are going to go against this and run BIG VOLUME RECT PORT heads on your street toy? wrong.

Get some Race Rite ovals if you are planning AL heads
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o 70 Elky 496 build coming damn soon!
$2000 454 is broken, ran well for a 3995# all-up wt.
1.631 11.727 113.37 91.47 midtrack 1.647 11.729 113.49 91.58 mph mid track
Bests 1.620 60 ft 91.60 best mph


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  #9  
Old Dec 7th, 12, 11:35 PM
Mike Mike is offline
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Default Re: BBC Hyd. Roller cam?

I just merged them George.
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  #10  
Old Dec 7th, 12, 11:37 PM
kettbo kettbo is offline
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George
 
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Default Re: BBC Hyd. Roller cam?

cool Mike...thought I had lost my mind for a second there...have another screen open to ENGINE, POOF, gone!
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George Kettler
o 70 Elky 496 build coming damn soon!
$2000 454 is broken, ran well for a 3995# all-up wt.
1.631 11.727 113.37 91.47 midtrack 1.647 11.729 113.49 91.58 mph mid track
Bests 1.620 60 ft 91.60 best mph


o 68 Vette 427/M-20/3.36 22 year owner
http://public.fotki.com/kettbo/gearhead/
o 68 Camaro Vert 327 project, painted, assembly stage http://www.camaros.net/forums/showth...183654&page=55
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  #11  
Old Dec 8th, 12, 12:32 AM
70 SS 454 70 SS 454 is offline
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Default Re: BBC Hyd. Roller cam?

i think the 320s will be too big

look at AFR 290 heads
worth the money

or the AFR 265 if the 290s are too pricey

call mike lewis racing engines for a deal on heads and chris straub for a killer cam
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  #12  
Old Dec 8th, 12, 5:52 AM
GRN69CHV GRN69CHV is offline
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Joe
 
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Default Re: BBC Hyd. Roller cam?

OK, now we have a performance target. Assuming you do not have the heads, you need to acquire a set of cylinder heads first. Current design large oval ports in the 265-290cc port range will provide killer power in your 454.030 and feed all the way to a 500" motor if you ever get the bug to build an even bigger motor. Brodix has a 270cc oval or a 294cc rec port, AFR has the 265,290cc oval/roval and the new 300cc head. Dart has a 275cc. Ede has the 290cc roval (same head GM uses on the ZZ427,ZZ454&ZZ502 crate motors). Once you get your heads, then cam accordingly. Regardless, XR282HR is a very poor choice. Why Comp still insists on producing and marketing .510" lift BBC hyd rollers makes no sense. A current design aftermarket alum performance head is designed to deliver significant flow at .400-.500" valve lift and higher. You want a cam that will take advantage of it by creating a large area under the curve. Hyd rollers, lift is your friend. I ran .650" lift hyd roller in the 540". Wouldn't hesitate to run a minimum of .600" lift as a daily driver in a BBC when running aftermarket alum heads.
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  #13  
Old Dec 8th, 12, 9:20 AM
jackie schmidt jackie schmidt is offline
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Default Re: BBC Hyd. Roller cam?

Therer is no reason, with todays technology, that a Hyd Roller with the same numbers won't equal a solid roller. Hyd Roller Cams are one of the all time great inventions.

With a Hyd Roller, I would go for more lift and less duration for a real street engine. My 540 that I am picking up next week will have 675 lift, 234-238 at .050 with 10-1. I went with the AFR 290 full CNC heads. The FLOW numbers that they produce at 600 lift are reaLLY OUTSTANDING, and the port velocity is up there from idle all the way to 6200.

You don't need a 7000 rpm port and cam for a 6000 rpm engine. By matching the components well, you can achieve the maximum good out of what ever you choose.

Also, there are so many cylinder heads out there now that your eyes glaze over just looking at the ads. I went with a proven product that backs up their claims with real numbers, and real life performance. Yes, AFR heads does cost, but this is one instance where I think it is money well spent.

My advice would be AFR 290'S if your budget allows, or a Brodix equivelent, custom Hyd Roller with no more than .232 at .050 on the intake and not less than .625 lift, the best rockers you can afford, (I used the Comp Cams Super Pro Magnums), have the block deck plate honed, and put it together right. That will give you close to 600 HP and an equal amount of torque, all in at about 6200. The curve will come in low and stay flat. It will be a tire shredder.

Don't fall for the old more is better. If this is truly a real street engine, you will love the 14 pounds of vacuum at 800 rpm idle, and the mild manners, that is, untill you kick all four barrels in from about 10 mph. Hang on.
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  #14  
Old Dec 8th, 12, 10:01 AM
cstraub cstraub is online now
 
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Default Re: BBC Hyd. Roller cam?

Drop me a PM and lets go over your power goals and we can figure something out.
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  #15  
Old Dec 8th, 12, 10:07 AM
mfret1970 mfret1970 is offline
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Mike
 
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Default

Either afr 265's or brodix 270's. No bigger on a 6500rpm 4" stroke motor. Also, take the advice above and connect with cstraub.


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