SpikeLS1

I am obsessed with the CNC LS6 kits that Pace is selling, and am doing my best to find a cam that will work with the heavily planed heads (and their high 11.25:1 compression) and yet make near 400 horses with a broad powerband using my current mods and yet still pass emissions tests and be near stock sounding.

My car is setup for SCCA Solo2 and street/roadracing, not quarter mile drag racing so keep that in mind, and for the next year or so it will continue to be my daily driver while I pay it off...

The heavy planing of the head prevents high lift cams, so what do you guys think of using the Comp-Cams 216/220 .525/.532 114 LSA cam with the CNC LS6 heads?

Is the compression on the CNC LS6 heads just too high for daily-driver usage? Would the Comp-Cam 216/220 head work better with "stock" LS6 heads instead?

My alternate plan is to order the Thunder Racing CNC Stage 1 heads and a TR220/220 553/553 114 LSA cam. However, I'm afraid the TR220 is a little to hot for my purpose, I want 400 horses without lope and I need to keep it emissions legal.

The price of each setup will be VERY similar once complete (LS6 likely slightly cheaper), however I get to sell my LS1 cores with the CNC LS6 setup, so that makes the LS6 setup $200 to $300 cheaper than the Thunder Racing setup

Any opinions or thoughts? What mild street cams are you guys using with the CNC LS6 heads?

LS6 kit
http://www.paceparts.com/subcatmfgpr...8&1=316&2=1094

<small>[ April 11, 2003, 11:04 PM: Message edited by: SpikeLS1 ]</small>

DONAIMIAN

iTrader: (18)

The TR220 is more tame than what you think. If I was going for the sleeper the @@0 is the cam that I would use. If not that you can try the GM hot cam, but thats on a 112 LSA and will lope. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

JPR

"My alternate plan is to order the Thunder Racing CNC Stage 1 heads and a TR220/220 553/553 114 LSA cam. However, I'm afraid the TR220 is a little to hot for my purpose, I want 400 horses without lope and I need to keep it emissions legal."

Is the better option IMHO over a 216 camed 250 cc head.

Joe.

Paul J.

I am running ported LS6 heads with a Comp 220/220 .564 115 LSA cam at 800 rpm idle with almost no detectable lope. Sounds stock through the Dual/Dual exhaust. A great emissions legal street combination.

Paul J.

GrannySShifting

iTrader: (10)

LS6s and a small cam seem like a waste to me. They dont pull away from LS1 heads until .500-.550 lift, and those CNC heads with huge runners will have no bottom end. They want more cam and lossa rpm

For the price of those LS6s you could have TEAs and some badass springsto support somethign liek THunderold man cam, granted with a little tamer intake ramp because your oign to be winding it out alot road racing. those 220+ duration cam shoudl be able to pass emissions easily, people manage to get a 230/244 thru emissions with a Emissions tune.

Also the smaller cam you run the less compression you want to have. 11 and a 1/4 shoudlnt be a problem, but there is a limit.

SpikeLS1

Are the TEA Stage1s pretty decent heads?
http://www.totalengineairflow.com/pr.../index.htm#ls1
I checked out their site, and they list them for $1300, which strikes me as very inexpensive for a pair of decently ported and assembled heads with good springs.

Would you guys recommend those Stage1s with a TR220 cam or the Stage2s for $1800 instead with that cam?

They don't list head details on their webpage, are Stage1 stock 2.00 intake valves sized and Stage2 something bigger? Aside from bigger/better porting, what is the difference between Stage1 and Stage2 from TEA?

Got Me SOM

iTrader: (2)

A lot of people run TEA's and have gotten fantastic results.

If you can afford it go with the stage 2 package. the better your heads breathe the more usable power you will have THROUGHOUT the entire rpm range.

After all an engine is just a big air pump. The power is found/made in the heads.

Since you're doing autoracing, check out absolute speed heads, they're low lift numbers are phenomenal and will help you make more power at lower rpms.

FYI a 224 cam will pass emissions too.

Gary98Z

iTrader: (9)

With good tuning, I think you could pass emissions with the TR220 and 114.

As for heads, I'd go with TEA. Alot of people are running them and are very happy. Don't quote me on this but I think I remember reading that all their stages have the same porting job. The differences in stages are the options.

Stage 1 single springs
Stage 1.5 dual springs and stock exhaust valve
Stage 2 dual springs and Ferra exhaust valve

The 1.5's sound like the best bang for the buck. I talked to Brent at TEA and he told me the 1.5's with the stock exhaust valve actually flow better than the stage 2's (5.3l heads). Their flow chart on their web page has the numbers.

If you look at the sponsors section, they're on sale right now too.

robertbartsch

yeh but how about price? ...my SDPC heads are NEW not used, and flow great...they only cost $980 per and I still have my old heads - no core charge....

...they have the new lightweight LS6 valves and are CNC ported from Lingfelter....

...they do work out to about 11.25 CR which is high but the dollar value relationship is great!

...just my opinion...

Pro Stock John

iTrader: (34)

I'd go with the TR 220//114 you should run more lift to take maximum advantage of those GM CNC heads. And it's not really that lopey and it will pass emissions.

You can order those through our exclusive GM sponsor Scoggin Dickey, please support them they make an effort to stock stuff for us and they tend to be very reasonable on their shipping costs.