Im thinking about ditching my f1a cog drive in favor of a single front mount turbo. Its a 355 lt1 with ported heads, forged rods and pistons, and a comp 224/236 114 lsa at about 550/500 with 1.6 magnum rockers. Im willing to make a cam swap with less difference in intake and exhaust duration, but wondering if anyone has tried this cam before..

 

Cam should be fine if you don't feel like swapping.

 

224/236 114lsa has a valve overlap of 2 degree, should be good for turbo.

 

I have a cam that BRE specced out for my engine setup that was originally meant for a blower. It's healthy, quite a bit of overlap, ect. then I changed my mind to the turbo. Talked at length with BRE about it and he said it should still work quite well, though it might give up a little bit on the top end, his estimations were about 20 hp. I can live with that.

For inquiring minds, cam is 234/244, .610/.610, 110° LSA.

 

This calculator http://www.wallaceracing.com/overlap-calc.php is saying that's 19° of valve overlap. You'd think that would be more than enough to cause a fair reversion problem. I believe turbo cams are typically around -5° to 0° overlap; my custom grind turbo Comp Cam is -4° (224/224 114LSA).

 

Oh I realize this. Believe me, take the TB off and there's obvious signs of reversion inside the manifold. I know that it's not optimal, but while I had the engine on the stand I called BRE and spoke with Bret and he and I talked for quite some time about the cam and he assured me that it wasn't going to underperform and would be fine giving up just a little bit on the upper end. It may not be your "conventional" turbo cam, but I think it'll perform just fine for my application.

 

I did the same. I had the same 224/236-114 cam (though the high lift version) with a Vortech T-trim then switched to a turbo. It ran pretty good, but I read too much on the internet and had convinced myself that a cam with a large split was all wrong (with people running reverse-splits and all). So, I got a custom 226/226-114 and it lost power across the board. I wound up putting the 224/236 cam back in and got my power back.