Cam suggestions

[DeWynter]

Well I'm looking for a cam for my current project. I'll give all the specs then I hope some of the Cam Savy will throw down some Ideas.

1970 350 4-bolt Block Bored .030 over W/ Roller conversion
New forged 400 crank
Forged connecting rods
Flat top two valve relief Forged Pistons
1987 Corvette Aluminum heads Ported 2.02/1.6 valves 5 angle valve grind
1.6 RR
Chromoly Push rods
Roller lifters
Super Ram Intake
30lb injectors
1 5/8 into 3" Headers
All ports and Gaskets are size matched

What I want is torque not top atainable HP. This is a street only car.

[joe ws6]

im guessing a custom grind. You may find more over at ls1 tech.

[Joe 1320]

The cam choice will depend on a few other factors...... total vehicle weight, rear gear, automatic (converter stall) or manual ? This is really needed to consider the best choice for your application.

[DeWynter]

1470 kg (3234 lbs)
5 speed manual
3.45 posi (9 bolt)

[94Z/28]

Call Crane or Comp and give them your car info and what you plan to do with it and they can help you find what you need.

[Joe 1320]

I should have also asked....... CR?

[DeWynter]

Currently static comes to 11.75:1
4.03 bore
3.75 stroke
58cc head
with a comp cams magnum 260/260 it was 9.7:1 dynamic

[fastTa]

Eric, based on what you told me in the PM, I think you would be happiest with either the Magnum or XE lobe in their retro roller camshafts. Since you want a bunch of torque down low, just ask Comp to grind in an advance...maybe 2-4 degrees. This will effectively lower the IVC and lengthen your dynamic stroke which will in turn make more dynamic compression and more torque.

I would pick something in the mid 230 range @.050", make sure it's a 4-7 swap cam(worth another 10 HP), and it should have at least .380" lobe lift if you want a strong torque curve. I would also not go any wider than 110 LSA.

[Joe 1320]

Eric, based on what you told me in the PM, I think you would be happiest with either the Magnum or XE lobe in their retro roller camshafts. Since you want a bunch of torque down low, just ask Comp to grind in an advance...maybe 2-4 degrees. This will effectively lower the IVC and lengthen your dynamic stroke which will in turn make more dynamic compression and more torque.
.

But..... there will be a trade off with advancing the cam timing, a slight loss of upper rpm power. Since I am not up to date with every latest cam grind, isn't there something that wouldn't require advanced timing and still give suffecient upper rpm power too?

[fastTa]

But..... there will be a trade off with advancing the cam timing, a slight loss of upper rpm power. Since I am not up to date with every latest cam grind, isn't there something that wouldn't require advanced timing and still give suffecient upper rpm power too?

Grinding an advance into a camshaft only slightly reduces peak horsepower. In other words, the shape of the curve is slightly lessened in comparision to engine speed. The overall power under the curve, specifically in the upper RPM range, is barely affected by grinding in some advance less than 4 degrees.

Eric said he wanted a stop light to stop light motor. Grinding in advance is perfect for that kind of car. It greatly increases the potential for off idle torque and better throttle response. Perfect for light to light.

[Joe 1320]

Eric said he wanted a stop light to stop light motor. Grinding in advance is perfect for that kind of car. It greatly increases the potential for off idle torque and better throttle response. Perfect for light to light.

That makes perfect sense.

[DeWynter]

Thanks for the info guys. I will be talking to comp next week some time. I will talk to them about what you guys have suggested. Thanks again.

[94Z/28]

You may have to get a cam ground on a small base circle if your rods are not stock type. When I put my 406 together I used forged Eagle rods and they would not clear a standard base circle cam. Another thing to think about is that if you have to run a small BC cam you may have to run longer push rods.

[Trash man]

LT4 hot cam if u can

[DeWynter]

LT4 hot cam if u can

Not a big fan of that cam actually. But thanks for the suggetion
I've been running alota cams threough the simulator program I have and it just didnt do it for the heads I have.