Redlinez

iTrader: (5)

Opinions? I was also recommended a Cam motion 220-222 580-600 112+4. I spec'd the cam above on XER lobes. I'm looking to make my daily driven TA more fun with a fatter midrange and low end gain. I realize I have a huge intake runner with Dart 225's on a 346, just trying to make it better until the days of a 402 are feasible. My current F14 highlift was never intended to be used with these heads, just kind of happened this way. My low end throttle response isn't impressive to me, but it rips from 4500 or so on up. I also have high flow cats if it matters- it made 413/387 as it sits. I also need a set of YT ultra light rockers and probably have my valvetrain checked, but I figure I better make up my mind to either keep what I have and add the rockers and get it checked for proper PR length and preload, or start over with another cam. Money has been tight, so I've been putting this off, but it's getting on my last nerve.

WeathermanShawn

iTrader: (1)

Hey Redlinez:

The only concern you might have with putting a 222/224 112+4 cam or any shorter duration cam on that head (62cc) would be your dynamic compression ratio (DCR).

I am computing 8.7 - 8.8 with the two cams you listed. While many run that high with good gas, I have had issues with 91 octane gas and a 8.5 DCR.

I have ran similar cams you listed on stock heads (66.6cc), and the low-mid range is quite impressive.

Having also previously ran a larger intake runner (227cc), I can relate to your lack of lower end throttle response. I could never totally solve it by just changing to a lower duration cam.

You could try a 226/228 112+4, or dial in less of an advance.

I guess what I am suggesting, is that for me that I did not have success trying to compensate for a 'lazy' air velocity flow, by just attempting to increase cylinder pressure utilizing a shorter duration cam.

Could end up with two problems instead of one. Not trying to be negative, perhaps someone else had more success than me.

I guess with good gas, you could give it a shot.

Let us know how it goes.

..WeathermanShawn..

405HP_Z06

iTrader: (11)

I'm running Dart 225's hand ported by myself and milled to 58cc's, my SCR is 11.31:1. I'm running a Vinci High Performance/Crane XXX cam - 222/228 .585/.585 115+3 w/ Crane 1.8 rockers. The power band is wide and smooth, no issue with low end and mid range torque.

What head gasket are you running? With the cam you specified, your SCR and DCR (which I don't put much into) are as follows:



The cam you specify should run well.

macca33

Personally, I don't reckon it needs 4 degrees of advance, 2* ought to suffice, or it may drop off too soon for you up top. I had the XE-lobed 222/224 @112+2 and it was a very nice cam - great manners and good power/torque - especially low-midrange. That split on XE-R lobes would be VERY good, especially with heads.

Cheers,

Macca

Redlinez

iTrader: (5)

Stock headgaskets, no milling or work done to the heads. I definitely don't won't detonation issues. I've already had to take it for minor adjustments when it got hot, and when it got cold. I don't know my compression exactly, I believe they said it bumped up between 1/4-1/2 of a point. I even thought of just going with what worked great in my stock headed last LS1, the ol 224/228 581/581 112+4 XER. I was recommended what I listed by Cam motion because he said it would raise my DCR I guess trying to make up some there. Oh, we have 93 octane everywhere here, but some isn't as good as others. I try to run Exxon or Amoco. Now that I read that computation, I believe they did say about 10.9/1.

Redlinez

iTrader: (5)

I'm starting to think it would be a waste of money, which might be better spent towards some YT rockers. I may see about having the cam dialed 2 degrees retarded though. I did find a used 224/224 581/581 112 XER cam though.......