What cam would be better suited for the street the LT4 Hot Cam or the Comp Cams XR288? The motor is a ZZ4 short block, pro action 180cc heads, HSR, 700R4 with 2200-2400 stall converter.

XR288

Advertised duration: 288 intake/294 exhaust
Duration at .050 in. cam lift: 236 intake/242 exhaust
Gross valve lift: .520 in. intake/.540 in. exhaust
Lobe separation: 110 degrees

LT4 Hotcam

218 / 228
Centerline: 0.525" / 0.525"
Lift (I/E): 112

 

The LT4HC with the heads you have.

 

I was leaning more towards the hotcam so thats good to hear. I have heard lots of postive comments about how streetable the hotcam is. This motor has not even come to be yet im just researching trying to put together a low 13 to high 12 street car that gets decent milage.

 

You don't have enough head or converter to use that XR288.

 

Yeah, the hot cam would be better for your setup as is on the street, but I say "**** on the hot cam". I don't like the amount of overlap it had in my old setup and it wasn't aggressive enough for the gas mileage it gave me in my old Spram setup with ported zz4 heads. I'd go with Comp, but go with a custom grind. I think the 224/230 XE would be perfect for your heads, but get get it ground on a 112 LS with a 108 or probably better yet for the StRam get 110 LCA, IOW 2-4* advance. This cam will idle better, run better +30hp over the GM cam, and will give the same gas mileage. If you do any port work to the heads then I'd say go for the 288 cam. Heck you could try it too. I know those heads flow, but the 288 might be just a tad bit too much for your intake runner size. A lot of people think that 236/242 at .050 is too big for computer cars on the street. It just depends on you cubes, intake, and heads. I think the 288 cam is a weenie in my setup. If you run the big comp cam (288) you'll for sure need about a 3200-4k stall, but you'd really be happy this way. This cam should put you at 60-70 more hp than the hot cam, you just have to have the high stall to get the car out of the hole, or you' may end up being slower. Either way, the big cam in your combo will crush the exact combo with the hotcam on the highway. Where do you plan on doing most of play'n?

 

This car is going to be driven daily to and from work in traffic but I want it to be a strong performer for the drag strip definatily low 13's. I don't really want to have anymore converter than 2400.

Im trying to select parts that give a nice strong torque curve for street driving but dont give up anything on the top end and Im wondering if maybe the superram would be better than stealth ram? I originaly picked the stealth ram beacuse of its price, ease of install, and abilility to support future upgrades.

 

If all you want is low 13's then you could get by with a zz4 cam. It would get you a little better mileage. I think your underestimating what your heads and intake can do if you're only expecting or wanting low 13's. Go with the hot cam, or better yet the cam that 1bad91Z run's, which is a littler hotter than the hot cam. This is the cam I described earlier, the 224/230 XE. It will give you what you're looking for and should be good for low 12's with your setup. You will at least be in the mid 12's with this cam and your setup, when you tune out all of the gremlins and get it to hook decent. You could even see 11's with slicks and more convertor.

 

hey...thinking almost the same setup here. except i was goin hsr, pro topline iron 200cc heads, and lt4hotcam. with a good tune what kind of gas mileage whould u expect. woudl the other cam be alot better and streetable?" Also, is the other cam with 1.6 rockers liek the lt4hotcam? i jsut want mid 12s. also, wanted to just the same keep a streetable car. thanks guys i want a thirdgen that can run with some newer sports cars are cars are to badass to keep slow :-)

 

if you are going with HSR, then click the green banner and see what some others use and have done.

 

Seeing this a lot these days!

Good info, though.