Thread: Cam choice

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I know this is purely my decision but Im looking to hear some voices out there, and some opinions.

Icar is a 66 Chevelle. Motor is 454 .030 over. Stock crank, truck rods with ARP Hardware. Pistons are TRW L2349 forged pistons. Compresion should be just at 10:1. Heads are 049 ovals with 2.19/1.88 SS valves, street strip port polish and flow quite well. intake is a Edelbrock RPM air Gap. Carb I have not decided but will most likely be approx 850 CFM mechanical secondary. Headers not purchased yet but will most likely be 1 7/8" primaries and 3" collectors. Transmission is a TH400 and will most likely run a 3000 stall. rear ratio will most likely be 3.73. Car will be 90% street, but not a daily drive ...just a car for fun, and of course want it to perform. Will add all necessary bolt on suspension necessities but will not tub or anything like that.

Ok lookng strongly at 3 different cams...2 solid flat tappet one hydraulic roller.

Cam #1 Solid Flat tappet

276/284
243/251@ .050
.568/.600 lift
110 LSA

Cam #2 Solid Flat Tappet
276/286
241/249 @ .050
590/610 lift
110 LSA

Cam #3 Hydraulic Roller
282/290
231/239
600/600
110LSA

I know the first 2 are close to identical and are same manufacturer. I just figured the Second one even though has a shorter duration by a tiny bit has a little higher lift #'s which Im under the impression the 781 and 049 heads like higher lift cams to breathe.

So any expereinced opinions are very welcomed and appretiated.

Thanks in advance for any replies

Oh another option but Im worried I will need to approach 3500 on stall and I dont know if I want to do that is another hydraulic roller as follows:

292/300
241/249
625/625
110 LSA

if your cars is under 3000 your looking at a loose 3000+stall for all of them but #3??

Originally Posted by pat mccarthy

if your cars is under 3000 your looking at a loose 3000+stall for all of them but #3??

Car is a 66 Chevelle so no lightweight as you know. Have not weighed the car but conscensus seems to be about 3500-3600 lbs without a driver.

So recommendations then Pat. Im just going by what the mamufacturer of the cam recommends. The third cam which is the hydraulic roller actually recommended 9.5:1 compression, 2500 stall and 3.73 gears. The first two solids indicated 3000 stall, 3.73 gears and 10:1.

Always appretiate and respect your input Pat so please fire away on whatever comes to mind/recomendations.

here is one to look at 298/306 050.238/246 621/621 108 lsa i would use this should hit hard and 10to1 or abit better will help . should not need to tub it my gto is not and i running a 632 .and yep them 66 gm A bodys are heavy cars

Originally Posted by pat mccarthy

here is one to look at 298/306 050.238/246 621/621 108 lsa i would use this should hit hard and 10to1 or abit better will help . should not need to tube it my gto is not and i running a 632 .and yep them 66 gm A bodys are heavy cars

Thanks Pat. Got a part/model # for this cam and the manufacturer or were those cam specs off the top of your head?

Thanks,
Scott

Originally Posted by 30-A Rider

Thanks Pat. Got a part/model # for this cam and the manufacturer or were those cam specs off the top of your head?

Thanks,
Scott

yep it is a Erson cams part number e129870 or R286-1 if you need one pm me that a hyd roller they make it in a soild roller as well #e120831