Mike TexaSS

iTrader: (2)

This is what they recomened for my stroker and this is a LT4. can yall give some opinions of this cam????


Well for that kind of rpm in a 409 I would use 3316/3317 HR114 +4. This would give you 288/294 advertised duration and 236/242 at .050. The lift would be .555/.576 with the 1.6 rockers. The lobe separation would be 114 degrees with a 4 degree advance ground in. I think this would be a good choice in a cam for that size motor and would make good power up to around 6200-6300 rpm and still work with NOS.


Michael Whitehouse wrote:



Ok my car is a 96 Impala SS with the following mods. Its a 409 stroker motor(see list below) I will be adding a 150 to 200 shot of n20 soon. But want to check into more cam options. I want max hp and torque on motor to be at about 6200 rpms(thats where i shift at). I want a cam with goos N/A power but with a lot of kick on n20.


TRM Automotive Budget 409 LT4
Heads: LT4 with 2.02" intake and 1.60" exhaust valves, CNC Ported, 1.6 Crane Gold rockers, 10.85:1 Compression Ratio
Cam: LT4 HOT, .525"/.525" lift
Bolt-ons: K&N Gen 2 cold air, 3.5" MAF, 58mm Holley TB, Meziere HD H20 Pump, 1LE Intake elbow, 30 lb SVO injectors, 255lph in tank fuel pump, under drive pulley, Royal Purple High Performance Lubricants
Exhaust: FLP Long tubes, FLP Cats (yup legal), 2.5 inch Dynomax cat back mufflers and resonators!
Tranny: Century 4L60E Beefed UP, TransGo Shift kit, 3600 Vigilante Stall
Driveline/Rear end: Dyno tech MMC Shaft (stock length), 3.73 rear w/ Eaton posi
Suspension/Brakes: Complete Energy Suspension Poly Urethane kit, Hotchkis X-tend upper and lower control arms, GMPP Durastop pads and x drilled rotors.
Track Notes: MT ET Slicks 26"x10.5"x15", Stockers up front w/275-40-17. Stage to 2600-2800rpm and floor it. Leave it in drive! Full tank 93, No octane booster. Shifts at 6200 rpms

<img src="gr_images/icons/cool.gif" border="0">

CHRISPY

Sounds like a good cam <img src="gr_stretch.gif" border="0"> Depending on your head flow numbers a little more lift might be a good idea <img src="gr_grin.gif" border="0">
Cheers,
Chris

Visceral

iTrader: (1)

On a stroker, I would NOT be into 114 ls. I would stick with 112. I dont know exactly what lobe series those are, but avoid the Extreme Energy lobes that large on the LT motors. The valvetrain cant handle it.

I guess Im still wondering why you dont want to go with the cc306 cam (230/245 on a 112).
The 15 degree difference in duration will be especially helpfull on the juice.

\chris

Mike TexaSS

iTrader: (2)

Im really worried about N/A power. Because ill only be on the juice about 5% of the time i drive the car.

Raughammer

A little correction.

The comp 306 is 230/244 @ 50.

It is an EXCELLENT N/A cam and performs well on the gas. The lobe design is a bit dated. (circa 95 or so)

But that comp cam that they recommended IS an extreme lobe. As has been noted... they sometimes have probs with the valve train. Sometimes not.

If its set up correctly... the recommended cam you posted earlier is a dang good one.

Good luck. Lift? for an LT1 that is plenty in my opinion.

Again. Good luck.

WeatherGuy

That sounds like a good combo for the stroker. Though it is for the LS1s, MTI has had a lot of success with the "R1" cam, which is a 232/236 114 LSA at .574/.578 max lift. Works very well, and the 114 LSA is not really robbing any midrange torque at all.

ChrisB

On a bigger motor you can get away with a litter wider LSA than you might on a smaller motor (sincey ou have more midrange torque, and also because of the later exhaust closing/earlier intake opening since the durations are bigger.

I would stay away from the big comp xtreme lobes - I just haven't seen many people have luck with them. If you do go with them I would run the comp R lifters and a rev kit - with 409 cubes your rpm's might be low enough anyway that it's not an issue.

I think that cam is going to make peak hp right around 6200-6300 or so, though it will really depend on the heads.

Chris

Mike TexaSS

iTrader: (2)

I have a AFR rev kit and shift now at 6200rpms. If that helped <img src="images/icons/rolleyes.gif" border="0">

TrahnZam WS6

[quote]Originally posted by Mike TexaSS:
<strong>I want max hp and torque on motor to be at about 6200 rpms... </strong><hr></blockquote>

If you find a cam that does that, I would be impressed <img src="gr_images/icons/wink.gif" border="0"> <img src="gr_grin.gif" border="0">

Mike TexaSS

iTrader: (2)

Very funny!!! You know what i ment!!! <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />

ChrisB

Is the hot cam really making power to 6200 in a 409" car? Do you have a dyno? What are the CC's on your intake runners?

If the way your setup is right now is giving you an honest 6200rpm shift point you are going to have a hard time going much bigger at all on the cam and not increasing your shift points.

FWIW if you make peak hp at 6200 you will end up shifting closer to 6500 - if you are going to stick with 6200 rpm shift points then cam the car down a little so you have more area under the curve.

Chris