Suprfun

iTrader: (2)

.. that I'm going to have milled .015 or less that I plan to install on my 97 C5 LS1. I'm using Cometic gaskets to improve the squish and also I will clean up the ports a little just to remove the obvious restrictions. I know there are better heads out there and I wish I could afford them but these are what I have to work with so I'm trying to make the best of it! I plan to add a 2002 LS6 cam at the same time, again I know there are better cams out there but it seems they all end up with valve train noise. I have done searches and have read a lot of info on this and it seems that the issue of valve train noise is present in most cam swaps, some people just tolerate it better! So after all of this rambling if anyone would like to add some input, give some advice or suggest a small QUIET cam I would sure enjoy some feedback.

My mods are listed below:
97 C5
Built and hardened 4L60e w/ TCI SF3000 converter
Vararam cold air intake
LS6 intake manifold
Dynatech headers w/ hi-flo cats
3:42 gears

Mark

Grimes

iTrader: (3)

Probably any of the ones in the low 22x/22x duration, and also slightly longer pushrods to make up for the smaller base circle. That would proabably satsify your requirements!

PREDATOR-Z

Comp cam 216/220, .525/.532 114,
Slow ramps but proven performance and when I used it back in 99/00, never had increased valvetrain noise.
I wouldn't mill your heads if they are unported, clean deck .005 if necessary and use a .040 gasket.
That should get you 3cc less for ~ 61cc
You can even reuse the LS6 springs if they are low miles (or new?)
Get hardened p-rods.

Nasty N8

iTrader: (33)

LS6 castings are very good castings use them with confidence you are a step ahead of most. There are better heads but not too worth it if you are staying stock cubes. There are much better cams than the LS6 cam don`t get me wrong it works great for a stock cam but as mentioned that cam looks good or if you can handle a little lope to the motor I have used the 224/228 Comp grind and it makes very streetable power with just a hint of lope. Makes good low mid range power.

Nate

Suprfun

iTrader: (2)

Thanks for your help and input guy's! I appreciate your help and comments. The heads have AFR dual's and titanium retainers so these will most likely stay. I haven't pulled the springs and valves out yet but the guy I bought them from said they had less than 4000 miles on them. They are in excellent condition appearance wise, no scratches, nicks or the like. Predator-Z I will be smoothing (porting?) the runners and polishing the chambers but I won't be removing much as Nasty N8 said they are pretty good already. I'm sure they wouldn't need but about .005 if that to clean them up so I'll take your advice and only do .005. Your cam recommendation is right about where I was thinking of going but was still afraid of the valve train noise. I really don't want to do the Z06 cam but I figured it would be the safest noise wise. I do like the idea of the non aggressive lobes on the .216 .220 though. If it didn't make any noise for you it should be the same for me. I have a 97 so I don't want to rev to high (original rod bolts) so would you recommend any advance ground into the .216 .220 114? What would be your guesstimate of how much more RWHP the .216 .220 would give over the 2002 Z06 cam?

Thanks,
Mark

PREDATOR-Z

They are ground with +4 advance if I remember correctly. Power range from 1600>6300 rpm
There is no real gain from polishing chambers, maybe deburring some rough spots.
You could portmatch to your headers.
They are pretty consistant as they are and the last thing you want is unmatched ports (unless you are good at porting and can do an even job).
You would benefit from running 918's for less mass since they already have lightweight valves.
You should see over 400rwhp with proper tuning. Lots of trq too.

Suprfun

iTrader: (2)

Great! I was hoping for 375 or so. Anything additional will be icing on the cake! Now if I could just find a .216 .220 114 cam in the for sale section!
Do you know who makes the dual Springs for AFR? Money wise it would be better for me if they could be left on. But if the 918's or Z06 springs would help with valve train noise for me it would be money well spent to get them. I plan to have it dyno tuned in the spring so I'll be sure to post the results.

Mark

itchygomey98

iTrader: (2)

I've always believed that port matching the headers is a bad idea due to reversion.

Rob

iTrader: (6)

The GT2-3 from LPE doesn't have any more valve train noise than stock. It'll also make a little more power than the LS6. And you won't be able to tell its in there either

66deuce

iTrader: (1)

as far as porting,i would just do a bowl blend,just below the valves.along with a good valve job.the ports are pretty smooth as cast,i don't think you'll find any gains by smoothing them out.don't touch the chambers.that should net you a nice little increase in flow.