Camshafts 69 l46
Thread Starter
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
My advice would be to start your own thread and include all the info I asked for on my first post in this thread in your initial post. This will give a basis to determine cam selection using the information absolutely required to give a good recommendation. Choosing a cam by how it sounds in a poor video in a different car that could be over a full compression point different than your car, could have a different trans and a could have a major difference in rear gearing is a recipe for disaster. 
Burning Brakes
Joined: Nov 2012
Posts: 788
Likes: 100
From: Indianapolis IN
Lift after the lash is removed and with the stock sbc ratio of 1.5 is .458 intake & .478 exhaust. (lash is .022")
It made enough torque to twist the driveshaft into two pieces and snap half the yoke off the rear in one short-shift into third, weeks later it broke three wheel studs in a row off when I short-shifted into second. Could've just been all my fault - I was young and even stupider than now
Thread Starter
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
Please bear in mind that those figures are with the BBC stock rocker ratio of 1.7 versus the SBC stock ratio of 1.5, and you will also have to remove the lash from the gross lift.
Lift after the lash is removed and with the stock sbc ratio of 1.5 is .458 intake & .478 exhaust. (lash is .022")
It made enough torque to twist the driveshaft into two pieces and snap half the yoke off the rear in one short-shift into third, weeks later it broke three wheel studs in a row off when I short-shifted into second. Could've just been all my fault - I was young and even stupider than now
Lift after the lash is removed and with the stock sbc ratio of 1.5 is .458 intake & .478 exhaust. (lash is .022")
It made enough torque to twist the driveshaft into two pieces and snap half the yoke off the rear in one short-shift into third, weeks later it broke three wheel studs in a row off when I short-shifted into second. Could've just been all my fault - I was young and even stupider than now
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
You asked for advice. I would be glad to help you out. Just need some basic info to give you a recomendation that works for you. Some peoples intended use is cruising in the Hot Rod Power Tour and they want good mileage, 1500 cruising RPM and their car will never see north of 4500 RPM. Others will be roasting the tires everytime they drive it. It will have 3000 RPM launches and 6500 RPM power shifts regularly and 1/4 mile times are the priority. These require 2 totally different philosophies when choosing components. I am not being a smart *** or trying to demean you in any way, just trying to help. You can go with your gut and buy the biggest Thumper cam available in a flat tappet and put it in. Quick and easy and it will sound pretty radical. It also might reduce street manners and your power across the entire RPM range by a 40 HP average compared to a cam selection based on the exact requirements your build, gearing and intended use calls for. 
Thread Starter
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
Well let me see if I have everything u needed. Took me time to find it all.
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Well let me see if I have everything u needed. Took me time to find it all.
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
I hot rodded my little 350 then 355. In its final forms it was in the low 400 hp and had a 7200 rpm red line with big heads and a single plane intake. As cam duration, carb, intake, heads, goes up, so does loss of drivability.
Roller cams are vast improvement. But it is TQ that gives the seat of pants feel when you push on the gas. TQ is a pure function of cubic inch displacement. Higher end street motors might be around a factor of 1.2 X CI At some point the only way to get hot rod type Vette is to either loose weight or go up in CI
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Kim, I'm from Nevada. I was just down in Parker.... boating and quad riding.
I hot rodded my little 350 then 355. In its final forms it was in the low 400 hp and had a 7200 rpm red line with big heads and a single plane intake. As cam duration, carb, intake, heads, goes up, so does loss of drivability.
Roller cams are vast improvement. But it is TQ that gives the seat of pants feel when you push on the gas. TQ is a pure function of cubic inch displacement. Higher end street motors might be around a factor of 1.2 X CI At some point the only way to get hot rod type Vette is to either loose weight or go up in CI
I hot rodded my little 350 then 355. In its final forms it was in the low 400 hp and had a 7200 rpm red line with big heads and a single plane intake. As cam duration, carb, intake, heads, goes up, so does loss of drivability.
Roller cams are vast improvement. But it is TQ that gives the seat of pants feel when you push on the gas. TQ is a pure function of cubic inch displacement. Higher end street motors might be around a factor of 1.2 X CI At some point the only way to get hot rod type Vette is to either loose weight or go up in CI
Burning Brakes
Joined: Nov 2011
Posts: 1,170
Likes: 201
From: Willoughby Ohio
If you stay flat tappet maybe try howards 110051-12 or if you are willing to go hydraulic roller,howards 181815-12.Both can be bought at summit and other speed shops.The 1st pn your current springs may work with the roller new springs will be required.If you stay with flat tappet make sure you break it in properly and with correct oil.Also must use new lifters! Good luck
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Racer
Joined: Jul 2004
Posts: 254
Likes: 1
This is internet "Legend".
Documented:
Properly thoughout vavletrain, which is required with any cam, on a hyd roller, rpms are in excess of 7000 rpm.
Hyd rollers exhaust note is aggressive.
Power levels with "correct" camshaft have exceeded previously cammed solid roller engines.
For a street guy a hyd roller make for a great all around performance package which can give the hotrodder years of HP.
Heel & Toe
Joined: Feb 2013
Posts: 21
Likes: 0
No doubt Hyd roller is the way to go,back in the day could not afford to go roller and did a lot of tinkering solid flat tappet did wonder for waking up my SB. I have a 454HO that is all stock and i want to go with a cam alittle bigger then stock.
Burning Brakes
Joined: Nov 2012
Posts: 788
Likes: 100
From: Indianapolis IN
Well let me see if I have everything u needed. Took me time to find it all.
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
You will have to be careful changing the lift without checking the valve to piston clearence , you're a great canidate for a custom spec'd cam because of your high compression+iron heads+lift restrictions, unless you are going to have an even higher octane available.
May be best to look at the ".450 lift rule" cams, there are some Howards Cams that are on a 112* lobe seperation that'll work for sure. You could also use 1.6 ratio rockers and the lift would still be safe at .480.
Last edited by 68post; Mar 7, 2013 at 10:32 AM. Reason: cam? - yes, answered.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Well let me see if I have everything u needed. Took me time to find it all.
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
350/370hp factory it s bored 30over
4:11 Muncie 4sp with 3:70 gears
Headers
Side pipes
770cfm Holley carb
Heads 202 1.5 with 11:01 compression
Aluim manifold
My driving. No 1/4 miles, but when I want power it needs to deliver. It's not driven daily. Don't care about gas mileage. Don't want to change the stock heads either. What I had before was a crane with intake 467 exhaust 494. With min rpm 2200 and max 5700.
It was a great cam I just would like to put something with a little more power without having to change heads. I can always put the same cam in. There are so many choices its mind blowing. Thank u again for help. Kim
You will need new springs and run high ZDDP oil as well.
Burning Brakes
Joined: Nov 2012
Posts: 788
Likes: 100
From: Indianapolis IN
At one time the solids were more aggresive then the current "at the time" hydraulics, (1980 ?). That's when I bought the Crane solid I mentioned earlier in this thread. Woke-up my 396 that had an "RV" cam in it.
Thread Starter
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
Well guy's I think it's Comp cam CCA-SK12-672- then I can keep the heads same. Want to thank everyone for there help and patients. Great suggestions but money is an issue. Maybe when I win the lottery
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
You will need springs. The Z28 springs should work. I would go with the K kit instead since you have to replace springs. Also get it custom ground on a 114 LSA. You need the later intake closing point to avoid detonation.
Last edited by 63mako; Mar 7, 2013 at 04:31 PM.
Thread Starter
Instructor
Joined: Apr 2010
Posts: 185
Likes: 8
From: Gilbert Arizona
Would this work without changing springs?
whNostalgia Plus Hyd. Flat Tappet Cam Small Kit
Chevy Small Block 262-400ci 1955-98
Lift: .483"/.477"
Duration: 286°/293°
Lobe Separation Angle: 112°
RPM Range: 2300-6500
Chevy Small Block 262-400ci 1955-98
still searching
whNostalgia Plus Hyd. Flat Tappet Cam Small Kit
Chevy Small Block 262-400ci 1955-98
Lift: .483"/.477"
Duration: 286°/293°
Lobe Separation Angle: 112°
RPM Range: 2300-6500
Chevy Small Block 262-400ci 1955-98
still searching
Last edited by bugzbunny; Mar 7, 2013 at 03:16 PM.
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
Call Comp Cams to verify about the springs - they list the 981 spring as well as the 986 spring. The 981 spring is 1 1/4" diameter, the same as stock, but it probably has more stiffness. I'm putting one of these in a 355 and look forward to good results. BTW, grinding this cam on a 114 degree lobe separation angle will RETARD the intake and make it close later by 2 degrees assuming that the overlap split is kept in the same place.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
That is a hydraulic flat tappet version of the cam I linked. You should always change to new recommended spring with any cam If the old cam is done fatigue is likely set in on the springs, especially if your changing the ramp, lift and duration. Odds of breaking a spring will increase a lot. You could check the spring pressures of what you have and compare them to recommended but I would change them.