I am looking for the most aggressive H/C package out there that will still meet / pass PCM/OBDII Emissions I/M tests. The two that seem to consistently put out the most power are:

Cartek LS6 Stage 2 Heads and X Cam
LGM LS6 G5x2 H/C package

Can anyone comment (hehe) on which of these might be a better choice and why? Or, is there another set-up I should consider? Does anyone have specs on head flow and cam design specs on these packages?

Thanks from the N00B!

:confused:

 

Agostino Racing offers heads/cam packages in the same power range as those you listed.

We did one awhile back on an 02 Z06 that made 449rwhp through Stainless Works Headers, stock cats/Hpipe/pulley, and a Corsa Ti exhaust. This was with a 232/236 114LSA camshaft and the car idles perfectly at 950rpm.

With proper PCM tuning, there is no reason this package would not pass an ODBII test. Unfortunately, you will not run into a package that makes power in this range that will pass tailpipe emissions. because of the size of camshaft that is required.

Let me know if you are interested in pricing or if you want any more information.

 

matt- that car was actually without a pulley and it still managed about 450 rear wheel. Who knows what it would have gotten without cats and with a pulley ;)

 

The ARE package you describe seems less agressive than the LGM G5x2...yet still dyno'd in the 450RWHP range? Anyone know how much to expect from the LGM package with similar supporting mods?

 

i think u should go with the tuner closest to you. if any?

 

I have a great tuner near me but was looking for other people's experiences with aggressive H/C packages (i.e. who is making what power with which package) to help me make my decision. I will have my local guy install / tune but we are trying to put the right package together.

Thanks!

 

950 rpm seems really high for a manual. What does a stock C5 idle at?

 

Stock is around 750 or so I believe.

 

Don't just go by dyno numbers.Cartek has the fastest H/C package for the C5,it's track tested and documented,they are the only tuner with a H/C C5 in the tens in the 1/4 mile,with three cars running 10.99 or better and over a dozen running 11.0-11.2.Good Luck in your choice.

 

Does anyone have the specs of their heads / cam?

 

Cartek's that is...

 

one of the other factors you should consider here is if the cam will fit without piston interference on a stock bottom end. That is unless your installer knows how to fly cut pistons while still in car. It can be done (I made a special tool to do so), it's not easy, but certainly opens the door to a bigger cam selection. Good luck with your choice!!

 

How many of those are owned and run outside of the Northeast?


[Modified by 93Polo, 9:33 PM 8/18/2003]

 

alright matt now I'm curious, if the H/C car has 449rwhp, why does your 436 only have 491rwhp?

 

Look at the TQ, there lies the greatest difference. ;)

 

i dont really know but i do know that a few of the guys did drive to florida from NJ to an event (think it was the breathless shootout) and ran 10's in florida heat. to name a couple two were c5pig and brent02zo6. also billyy2k is from connecticut. they all drove down and drove back home in their c5's

 

oh OK, i have carteks old milder H&C ls1 set-up and run mid 11's. they have new stuff now. i also know there was one guy that dynoed +or- 470rwhp with his zo6 in their new package. 4got his name here. KH1 or something like that :confused: i'm sure he will chime in soon. its a red zo6

do u have an A4 or a 6speed?

does ur installer have any experience with anyone particular's head & cam set-up? who does he recommend?


[Modified by robsvette, 10:44 PM 8/18/2003]

 

If you compare peak numbers of heads/cam to peak numbers of a stroker, you are not giving a fair comparison to justify the extra cost of a stroker.

Strokers, especially a 436ci, make a TON of torque (and hp) from 2500-5000rpm where a heads/cam car makes far less. This makes for a VERY noticable difference.

Also you have to remember that, in a stroker motor, you are paying for parts of the rotating assembly that do not necessarily add a ton of HP to the engine, but they do supply the strength to hold the whole package together with the increased displacement and airflow.

I will try to put together a dyno chart comparison of a heads/cam car with a 436. The difference will be evident by the big difference of area under the torque curve.

Unfortunately today's strokers are also faced with a bottleneck that is supposedly, and hopefully, going to be eliminated very shortly: the intake manifold. I think you will see the peak numbers jump up substancially when a better intake manifold is developed that does not rob major low end torque for minor peak increases.

And one more excuse :D , my 436 has a set of ARE Stage III heads on it that are almost 3 years old. They have made some definite flow improvements since these were done. Most of their recent superstrokers are all making over 500/500 at the wheels.

 

well said!

 

The Cartek packages are good but dont count LGM out. LGM is "where money buys speed" Proven race technology and know how.
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