LSx Cam?

[Deuce4935]

What are the goals of the car. I woudn't run either of those cams. Much better options with better lobes than those two out of date cams. TR 224 isn't bad. I have some better choices. What is the Max rpm of engine. Where do you want' peak power to occur and what shift point do you want. Include trans type/ convertor/ gear and tire combo. Also what is the weight of car. Maybe I can help you out with selection. Bigger isn't always better. Some of the big LS1 cams drive like crap and will lose alot of torque down low. On the stock cube stuff in a heavy car I like to keep the IVC (intake valve closes) around 42-46 degrees that will give you a high DCR and keep low end torque good.

Its going to be a street cruiser with the 4l60e(shiftkit&2300stall), 373 cogs with 20x9.5" rears. The engine is a 98 ls1 with ls6 heads(ported&polished) stock intake and throttle body but 1.8 roller rockers which is why I dont want an overly aggressive cam just something bigger than stock but with good street manners.

 

[Anonymous]

Look into some cams from Comp Cams, XR273HR, XR277HR etc....nice "mild" duration and low lift, combined with those 1.8 roller rockers should bring you back up in lift.

Or see what LS1 BU has to advise?

 

[Anonymous]

If i were you I would ditch those 1.8 rockers and stick with the stock ones. Stock rockers work best on these motors. I've always used my stock rockers. Alot of people using the 1.8 rockers have valve float issues. This cam I'm going to recommend will be an all around cam with a butt load of low end torque. It should peak horsepower in the 6000-6200 area wouldn't have to spin motor over 6500 shift points. Could even shift a little lower. If your set on the 1.8 rockers I would use the comp xe lobes. If you go back to the stock rockers I would use the xfi lobes.

Comp cams
dur at .050 230/230
lsa 111
intake centerline 107 (+ 4)
Intake closing point of 42 degrees to keep the dynamic compression up(lots of torque)
8 degrees of overlap. Nice sound and should idle at 850 rpms, Plentery of vaccumn for power brakes.
Is this in a auto or manual. If auto I would recommend a 3200-3600 stall. These motors like big convertors because they make peak torque around 4600-4800 rpm.

 

[Anonymous]

Just saw it will be a auto with 2300 stall. I would recommend a bigger stall for any cam that isn't stock. That 2300 is basically a stock convertor. We have run a 4400 stall on stock internals. Convertor is the key. Don't worry about the gear.

I ran a 3600 stall last year and this is what it would do in street trim/ 17 drag radials the way i drive it. 1.5 60fts all day long.