Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Recommended cam for roller 355 LT1 heads
View Single Post
  #10 (permalink)  
Old 05-17-2010, 09:17 PM
techinspector1's Avatar
techinspector1 techinspector1 is online now
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,310
Wiki Edits: 326

Thanks: 837
Thanked 1,151 Times in 950 Posts
Well, flyin' by the seat of my pants, I have figured the static compression ratio at 10.57:1 and have researched and found the specs on a ZZ4 cam. Intake opens -8, intake closes 36, exhaust opens 42.5, exhaust closes -1.5 for an intake duration of 208 and exhaust duration of 221. Lift with 1.7 rockers is 0.532"/0.541". Intake centerline is 112, exhaust centerline is 112, lobe separation angle is 112.

I never thought I would find myself sayin' this, but leave this motor alone. If you want more power, build a bigger motor. This one is maxed for a 355 street motor. More cam will make 20-25 more hp, but the best cam I tried will not make more torque than the ZZ4 cam makes in this motor. In my opinion, it would be foolish to change cams just to make a little more hp and the same or less torque than you're making now. Here is your motor on the DynoSim. Gobs and gobs of torque right from the git-go. If you're not rippin' the tires off from an idle, then your tune is off.

RPM HP TQ
2000 159 416
2500 211 443
3000 253 444
3500 300 450
4000 342 450
4500 375 438
5000 395 415
5500 405 384
6000 372 326
Reply With Quote