JamesZ28

Ok so my car is a '93 LT1 with mild heads/cam (LE2) build. I'm currently working on a turbocharged 377-380 stroker build and we've come to the point of picking a cam. Currently I've got Lloyd Elliott's 226/232 .578/.574 110 LSA cam. I called him up and he recommended a 223/223 .565/.565 114 LSA cam for my current build. My question is, since I'm far from good with understanding cams, is there enough difference in cam specs here to warrant the change. Would you change in this situation? Just to give a little more background on the build/car it will have a bw s400 on it and be a weekend toy. Anything from the strip, occasional track day, to some back road fun once in a while. Thanks in advance for any help!

DirtyDaveW

I would follow Lloyds cam choice on this, the LSA of 114 being the larger advantage. Some folks have gone to the CC 224/236 with an LSA of 114 and had stellar results but that car was, I believe, mostly a strip car. Anything that you're going to enjoy on the street would be more like Lloyds spec.

My own 355 C.I. LT1 Turbo cam is I/E: lift-.572/.566 dur @ .050-218/224 LSA - 112.5 using 1.6 rocker ratio.

engineermike

Whatever you do, DO NOT USE THAT CAM. Several years ago, I had been running the 224/236-114 cam mentioned by Dave. I finally succumbed to the hype and bought a "turbo cam" that was 226/226-114. It was a terd, and lost around 50 rwhp vs my "all wrong" SC cam. That "turbo cam" cost me a few bucks and some busted knuckles for nothing. I wound up putting the 224/236 cam back in.

Also, as for the LSA/overlap issue. . . it's amazing how strong the foothold is that this has. I ask, though, has anyone seen some dyno test results proving that more overlap/tighter LSA is actually bad for a turbo motor? Every one I've seen proved the opposite is true. INTMD8 did a bunch of turbo LT1 dyno testing years ago and concluded "every time I added overlap, it made more power." Also note that the stock GN cam was on a 106 LSA, while some popular longer duration aftermarket GN cams are on a 110. There was also a guy on LS1tech a while back with a GTO that ran his NA cam (23x/24x-110) with a turbo and made more power than most thought possible with his smallish turbo.

Bottom line is, don't be afraid of overlap or a traditional split pattern cam with a turbo setup.

Kevin Blown 95 TA

Yeah, you're right - I wasnt thinking.... My explanation doesn't make sense for the turbo so I just deleted it