WiseGuyZ

Has anyone ever tried this combo??? I called LPE and asked them the flow #'s on the heads and they told me that at .500 lift they flow 294 on the intake and 220 on the exaust ports is this true??? From what I heard they ported the heads for GM.

Now for the cam, I was told by scoggin-dickey parts center that the LS1 ASA cam would be the best choice for these heads the specs on the cam are 226*/236* duration and .525/.525 on a 110 lsa at 0.050 the rpm range is 2200 rpm to 6500 rpm. Does this sound like a good combo?? I would appreciate some feedback on this. I mainly would be drag racing the car as well as street driving. THANKS Andy

Bink

Here is a thread on the heads - http://forums.corvetteforum.com/zerothread?id=562889
These heads were designed and flowed for the Grand Am cam by LPE for GM.They have a serial # from LPE.
Here is J-Rod's excellent write up on these heads http://forums.corvetteforum.com/zerothread?id=432997
There are several guys on LS1Tech.com running the ASA cam. :thumbs:
joel(Bink) :cheers: :steering:

WiseGuyZ

Hey thanks appreciate the info. Im going to do the package with the asa cam only because I want to drag race the car and the grand am cup cam is just way too big for what I need.

WiseGuyZ

So do you think that the ASA cam would be a good chioce for the CNC LS6 heads.??? Remember ill be mostly drag racing the car as well as some street driving THANKS, Andy

J-Rod

The ASA cam has really slow ramps so it will work with the stock springs. I think you can get a better cam and use some better springs. In fact, you can get a cam that idles better, but makes more power than the ASA cam.

WiseGuyZ

Well J-rod which cam should I get then.?????? REMEMBER ILL BE DRAG RACING MOSTLY THANKS Andy

fdxpilot

Thunder Racing or Morgam Motorsports 224s seem to be real popular, but will need a tune to work their best. I'm looking at the TR.


[Modified by fdxpilot, 1:47 AM 6/14/2003]

WiseGuyZ

Well guys this is the way I see it, Im going with these heads and the ASA cam why because the heads flow great #'s at .200, .300, .400, .500, .550 lift and thats whats important to me. The ASA cam is only .525/.525 lift at 0.050. and these heads flow great between .500 and .600 lift. I can get the heads and wont need to change valve springs because the heads come with 02 and newer valve springs which can handle up to a .551 lift. So thats all set the spring issue, next the valves are 02 and newer valves which are lightweight thats is cool, and last the price at $985.00 a piece thats a steal and they are ported by LPE to top it off.

Also I went 11.937 with an 01Z and the engine and exhaust was TOTALLY STOCK. Now if you look at the 01Z cam its a 204/211 .525/.525 at 0.050 and the ASA cam is 226/236 .525/.525 at 0.050 so with that all in mind I should easily be in the mid to low 11's with this set up. What Im saying is that you DON'T need a HIGH LIFT CAM TO GO FAST. Duration is what counts to a certain extent not lift right or wrong????

WiseGuyZ

Does anyone know what the lift would be if I add a set of 1.85.1 slp rocker arms to the GM ASA cam that has a .525/.525 lift???? and will it clear the stock LS6 valve covers??? also does it add duration to the cam??? thanks, Andy

Face

:withstupid:

Bink

Increases it to .571" lift. In theory won't change duratiuon but in actuality may by a "hair" due to increased distance (time) for closing event. :yesnod:
:cool:
joel(Bink) :cheers: :steering:

J-Rod

You are right about the heads. The low lift numbers are good on them. The exhaust side is not as goos as many of the porters out there. As for the ASA cam, it is a cam for the ASA series. It is not a cam for drag racing. Trust me when I say that I have looked at these heads extensively. As for that cam, as you point out, it has fairly low max lift, but as you said, the heads flow good on mid lifts. Well, that cam has slow lazy ramps. Why have a cam that spends most of its time in a poort lift region and has much less area under the curve than one of the other newr designs out there. Such as the comp cams XE-R lobes. You are going to have to tune tha car to use the ASA cam, and since it is on an 112 LSA you wil not pass emissions more than likely if you have to do a rear tailpipe test. Sure, the cam is big and lopey. But, for about the same sound, and the same ammount of tuning, you could put in an LGM g5X2 make more power, etc...

As for the duration being the key, that is a bit one dimensional. Lift and duration work together to get your area under the curve on the cam. Spend the money and put a better spring (Comp 918 or REV1116) on the heads and get a better cam.

I think the ASA will sound mean, but will ultimately be down on power from a cam with a better lobe design that will idle better. If you want a nasty sounding cam, again look at the LGM or something equivilant. If you want something that simply makes more power, look at something like some of the cams from Thunder Racing or MTI.

J-Rod

If you go to a 1.8 or a 1.85 you will need to upgrade the springs as they won't handle the lift and you will end up with massive valve float. Duration goes up between 2 and 4 degrees since your lift @ 0.050 is achieved earlier.

Quick Brick

I would buy a cam custom ground for your needs. That way you can get the lift without the extra cost of rockers. Also you can get one to run better overall from idle to top end than the ASA. I would run something like a 226/232 610/610 lift on a 111 or 112 lsa. Mill them .35 to get compression up near 11:1. Whatever head you buy I would get a good porter to hand finish them.

WiseGuyZ

Thanks for the replys J-ROD and Quick Brick. J-Rod if I was to get thoes heads I would have SDPC put their SD PRO springs on the heads. The 02-03 springs are junk in my opinion. The SD PRO springs specs are lb@1.770"-110lbs/ lb@1.250" 320lbs max lift .600". Thoes springs should be good for my combo. The 02-03 spring specs are lb@ 1.770"- 90lbs/ lb@ 1.250"- 275lbs max lift .551". So the SD PRO springs should work for my combo.

J-Rod why wont the ASA cam be good for drag racing. The stock Z cam's werent intended to be used in drag racing but they work just fine. I know many people who went 11.7's on stock 02 Z's with stock engines and exhaust's and I went 11.937 on a stock 01 Z that had a stock exhaust on it. So could you please explain to me why the ASA cam isnt good for my street/drag application thanks Andy.

Quick Brick

The Z cam is a great combo of hp and torque. Remember torque gets you going and HP keeps you there. The ASA is really a HP cam for road racing so the torque doesn't hit the tires hard on a road course and the HP goes down the straights. You need a good mix of torque and hp for drag racing. A 110lsa cam will wear you out in parking lots and cold starting etc.. lsa builds torque also because it raises cylinder pressure. The ASA is designed to run on race fuel and high compression, you don't get all the benefit of the ASA cam on pump gas and stock compression.


[Modified by Quick Brick, 10:33 PM 6/15/2003]

WiseGuyZ

So what cam would you recomend then???????? :confused:

Quick Brick

I stated the rough specs earlier. The new LG cam is a nice off the shelf stick as well. Look it up what is it called the G5XGTR blah blah, LOL! I think it is 232/236, 58X/59 lift on a 112lsa. It is a good driver and racer cam. I would compramise a bit because building a street car for 1/4 mile use isn't good for resale or enjoyment the other thousands of miles. Bring me the LG cam! :lolg:

WiseGuyZ

Ok thanks for the replys guys ill let you know what happens.

J-Rod

The ASA cam is a circle track cam. As for the LS6 cam, you have to look at the event timing more than the gross lift and duration figures. The only reason it makes power the way it does is the event timing and the LSA. Right now, the best max effort cam out there is the LGM G5X2. But, with your heads you will have to notch te tops of the pistons since they have been milled .055. As for valves, I would recommend the rev 1116s. I would also have the CNC marks smoothed out especially in the combustion chambers. I think those spots lead to hot spots which cause detonation. I think LPE will smooth them out for about $300, as would most shops.