Cam recommendation for 652 BBC

[turbinetom]

Fellas (and ladies),
I am into my first attempt at a larger cubic inch Chevy and need cam advice. My block is an older Donovan 11.100 that cannot be bored for large cam journals. Engine will be used in lighter dragster with powerglide and 33 inch tall tires. Estimated total weight 1650 lbs (???)
Engine specifics are 652" BBC with 18 degree Dart Big Chiefs with full CNC port and titanium vlaves (2.400 /1.900). Compression at 15/1. Crank is 5.100 stroke.Bore is at 4.510. I would like to run 2 Dominators on sheet metal intake (gas- no nitrous). I would like help with a cam selection and don't need something that will "kill" the springs and valvetrain. Basically, my hope is to come out with a large inch, lightweight package that makes good power without having to turn the unit excessively. I am OK with sacrificing some power in trade for reliability.
Thanks in advance..Tom
Danville IN

[thedude]

Hello, I have built many big chief 622, 632, 706 BBC engines. Most of them with sheetmetal or cast tunnel rams with 2X4 4500 carbs. I use Erson or Comp cams mainly and most of the time custom grinds. Here is a grind I use often for a 622, 12 Degree, 2X4, dry sump, natrually aspirated drag race engine, corrected dyno figures for this engine are 1260HP & 925ft/lbs. Cam is mechanical roller, 4-7 swap, Duration @ .050": INT288/EXH308, Lobe Lift: INT.495"/EXH.475", Lobe Separation Angle: 114. Thanks.

[turbinetom]

Hi "Dude"
Thanks for your reply. I know there is never a "one size fits all" answer for this type of question, but I need to get in the ballpark. Have you got anything availabe to sell?

Regards,
Tom

[thedude]

Tom,

Actually I do have some custom grind Erson cams on the shelf. If you are looking for a custom cam that will perform in a large cubic inch displacement BB Chevy with big chief style heads, I have another spec grind that I work specifically with Erson on and this particular grind has a lobe design that is less aggressive and more spring and valve train "friendly". I have many hours in R&D on the dyno with different cam profiles and this is one of my favorites. This cam is used in 14 & 18 degree Dart big chief 572-605-632 bracket engines. Cam specs are: 4-7 Swap Firing Order, Duration @ .050": INT284/EXH298, Lobe Lift: INT.475"/EXH.450", Lobe Separation Angle: 114. These cams are in stock ready to be shipped. Price is $339.99 + shipping. Email: [email protected] or call 307-322-2062.

Thanks, Sean

[signsbyesa]

as you need more info try clay smith engineering "mr. horsepower"
@ www.claysmithcams.com that might be it or it will guide you
to the correct website, hey get well informed and get all your
options, i like to talk to guys that all they do is grind cams,
my first was a chet herbert, good luck :wink:

[hammertime]

Call Bullet Cams ... that car is going to fly @ 1650lbs !

[Tod74]

total weight 1650 lbs (???)
Engine specifics are 652" BBC

:shock:

[turbinetom]

Fellas,
Thanks for all the input. I bought this car from the second owner and it weighed in at 1350 with an iron small block and driver. Car is a 250" RED that was built in Bob Meyers shop and is a 100% knock-off of Rick Santos legendary small block alcohol machine. Mag floater rear,no paint and black anodized panels to keep weight in check.
BTW..I'm offerring my 1st motor I built for the car but never used. If anyone wants a great 565 Big Chief (1021 hp /795 ft.lbs) give me a shout (or search 565 Big Chief on this site) I've just got the hanker'in to go a bit faster and the aluminum motor appeals to me.

Kind Regards,
Tom Timmermann
Danville IN

[hammertime]

Fellas,
Thanks for all the input. I bought this car from the second owner and it weighed in at 1350 with an iron small block and driver. Car is a 250" RED that was built in Bob Meyers shop and is a 100% knock-off of Rick Santos legendary small block alcohol machine. Mag floater rear,no paint and black anodized panels to keep weight in check.
BTW..I'm offerring my 1st motor I built for the car but never used. If anyone wants a great 565 Big Chief (1021 hp /795 ft.lbs) give me a shout (or search 565 Big Chief on this site) I've just got the hanker'in to go a bit faster and the aluminum motor appeals to me.

Kind Regards,
Tom Timmermann
Danville IN

Tom, how fast you looking to go with the 652 ? that 565 would of been very fast also, 1020hp @ my 2000lbs would go 7.4's . Where is danville at ? I am on the mich/ind line

[bjuice]

Tom nice looking 565ci..just curious,,ya got a Nos cam or something in that 565ci...1021hp seems a little low on that engine with those Big chief heads...i am thinking 1140 to 1150 ?




good luck selling ! and with your new project

[turbinetom]

Hi Dave,
Danville is next door to Avon / Brownsburg (ORP). I'm getting back into racing after about 15 years, because the quick 8 / 16 programs have renewed my interest. The thought of bracket racing with a throttle stop makes me want to get back on the couch. The 565 came together by accident from collecting parts for the larger motor..just kinda got out of hand and before you know it, I'm the proud papa of a screamin Big Chief.
Anyway, its for sale to hopefully finance a bigger motor. With the economy the way it is..looks like I'll own it for a while...ho hum...

Tom

[turbinetom]

To Bjuice,
No, cam is an Erson grind that Reher Morrison puts in their program engines. Essentially the 565 is a RM motor put back together with new parts. I think 1020 is about "par" for a motor that size with 18 degree heads. Still 1.8 HP per cube. I never had the thought of using nitrous, but the engine has NOS capable pistons installed. If I could get the figures your talikng about without NOS..I'd keep the motor, but I just think that is a little ambitous with the combination I have.

Tom

[bjuice]

To Bjuice,
No, cam is an Erson grind that Reher Morrison puts in their program engines. Essentially the 565 is a RM motor put back together with new parts. I think 1020 is about "par" for a motor that size with 18 degree heads. Still 1.8 HP per cube. I never had the thought of using nitrous, but the engine has NOS capable pistons installed. If I could get the figures your talikng about without NOS..I'd keep the motor, but I just think that is a little ambitous with the combination I have.

Tom

thats cool..its still a wicked 565ci either way. :D

[Tod74]

yeah if I had a 1600 lb car and all I had was 1020 hp I wouldn't even bother... might as well run trophy. :lol:



man that thing is gona be crazy fast... Sounds like a neat car too.

[hammertime]

Hi Dave,
Danville is next door to Avon / Brownsburg (ORP). I'm getting back into racing after about 15 years, because the quick 8 / 16 programs have renewed my interest. The thought of bracket racing with a throttle stop makes me want to get back on the couch. The 565 came together by accident from collecting parts for the larger motor..just kinda got out of hand and before you know it, I'm the proud papa of a screamin Big Chief.
Anyway, its for sale to hopefully finance a bigger motor. With the economy the way it is..looks like I'll own it for a while...ho hum...

Tom

Tom,
Not fimilar with the quick 8/16 program down there, can you explain what it is ? Indy is 3hrs from me, raced several quick 8's at bunkerhill. I like that quick stuff, you plan on racing some Jegs Quick 32 stuff also ? May see you next year if so.

[michael1]

turbinetom, I would definitely give thedude(sean) a call and talk with him about what you are looking to do.I called him and he was pretty sharp with these big cubic inch motors and he seemed to be a super nice guy.He worked with some of the best in the business but you can call him to find out who it was.I can assure you that you will be very impressed.

[turbinetom]

Hi Dave,
I'm not 100% in tune with what goes on in the Quick programs either, but it renewed my interest in drag racing when I started hearing about the programs. Still bracket racing, but with a "competetive" goal. Main cataylst was that I got into 4 of these big Donovans incredibly cheap. Car was a steal and is immaculate. I bought it with a Lenco CS2 which I sold the setup, so now I'm into the car for $900..and yes the car is certified to 6.0's just this spring. Definitely, I'll be around next spring and I'll look for you to say hello.

Tom