Anyone running this cam? Would it be a good setup with patriot stage 2 ls6 heads? Mild at idle?

 

As a matter of fact, I have that cam... on a 112LSA... through stage 2.5 5.3L heads. I love it. I originally wanted something stealthier; in my opinion, lope was for dragsters, not refined cars like Vettes. Then, I found that in order to make the kind of power with the kind of power curve I wanted, I'd need to go with something like the 224R. I'm making 410whp with 390 torque. The torque curve is Beeeutyful. I have a great low-end (which you tend to lose with smaller cams and lower overlap). Below is my dyno, which is just about 90whp over stock with Vararam and Z06 Ti. I have also put in an idle clip of the car through longtubes with the Z06 Ti catback. Warning: this cam will sound a lot meaner through a loud catback. The Ti's hide the lope quite a bit, because they are quiet. You can still hear it up close, but sitting next to it, it's not obnoxious at all. Actually, in the car itself you don't really hear much lope. You hear it more pronounced on the video because the camera is up close to the tailpipes. I'd be more than happy to answer any specifics you have. Some things people usually ask for are...

1. Does it shake at idle? Not much. It does shake a little, but it's not obnoxious.

2. Does it surge? Not at all. The only difference I have noticed is that at sub-1,000 rpm, the rpms will drop a little quicker than stock, but if it's in gear, it will pull at 1,000rpm just fine. Gas mileage hasn't gone down either.

3. How much valvetrain noise? There is some with this .581 lift cam, but it's not that bad, to me. With the windows up and no radio on, you can hear a sound like cicadas. It's actually not that noticeable standing next to it.

4. How fast is it? I ran it at the track one time, and I ran a 12.4x at 117.4mph. This was the first time I had ever tried to launch it after getting the new setup, and was with runflats, and I bogged the launch. I think the mph is indicative of how it pulls more than the time. I should have run quite a bit better time.

Let me know if there are any specifics you'd like me to answer...

Edit: How dumb could I be? I didn't put in the dyno graph or sound clip. Here they are... Doh!

 

see sig

 

how would it match with a set of patriot stage 2 ls6 heads?

 

same heads i have. runs like a dream

 

I would guess it would get a few more ponies up top (assuming you had the same level of porting), than I do with my 5.3's, but maybe just a hair less low end, due to the smaller intake runners on the 5.3's.

 

im a heads noob, what are 5.3s?

 

5.3's are heads off a 5.3 liter motor which have a smaller combustion chambers giving you more compression

 

And they are typically a hair cheaper than comparably ported LS6's. A few years ago, they were quite a bit cheaper, so more people used them. Now, they are only $100 cheaper. I could have bought Stage 1 LS6 heads that flowed about the same as the Stage 2.5 5.3's for about the same money. I opted for the 5.3's because of the higher compression and smaller intake runners. The compression thing isn't that big of a concern, though, because you can have LS6 heads milled down for free by the manufacturer to get the same compression as the 5.3's, or you can use a Cometic gasket to get the same effect. The smaller intake runners on the 5.3's will help lower end torque by increasing the velocity of the air coming in (same amount of air through smaller runners = higher velocity). At least that's what I have always read. AFR's heads have even smaller runners than the 5.3's, and you can see how awesome they are on the low end. If you are looking for maximum hp, comparably ported LS6 heads will flow better, and are probably what you want. If you are building on a budget, and like the low end as well as the high end, you can do what I did, and get the 5.3's with equal flow to the less ported LS6's for the same money.

 

I am on a budget, and am interested in the 5.3 idea. Do they flow better then stock ls1s? do you have any dyno numbers? where di dyou get yours?

 

are these what we are talking about?
http://cgi.ebay.com/ebaymotors/Chevr...QQcmdZViewItem

 

I believe in stock form the 5.3L heads have smaller intake valves. Not sure what they do to them when they advertise the Stage 2.5, maybe they put in the 2.00 intake valves and port them. I would like to know the answers to, I'm also on a budget.

 

I been looking at the
VRX3 226/228 .585/.588 on 112/113/114 lsa for my cam in my 99 coupe. Although i plan on keeping stock stall since its a pure street car it will be 114lsa for me. Just cant pick heads to put with it would stock ls6 z06 heads be a waste of 600 bucks?

 

ttt:-}

 

They flow boatloads more than stock LS1's, and better than stock LS6's. Anything ported and polished is going to flow better. You can probably find stock flow rates on this site or ls1tech.com for LS1 and LS6 heads, and then compare those #'s to the flow numbers on either Patriot Performance's website or Texas Speed's. Both have various levels of ported LS6 heads (I'm not sure if Patriot has 5.3's or not, though). My dyno graph is posted above. I bought mine at Texas Speed.

 

anybody want to share the secret information

 

Both of Texas Speed's 5.3L heads (stage 1.5 and 2.5) have 2.04 intake valves. Predator-Z over on LS1tech.com said the 2.04 intake valves are a gimmik over 2.02 valves, because they sit on 2.02 seats, and therefore don't flow any more. He also says that the LS6 heads are the way to go these days. He went with the 5.3's because at the time, he claims LS6 243 heads were 3 times more costly. Nowadays, the difference is a couple hundred bucks. He says it's worth the couple hundred $ to get the better flow of the LS6 heads. Maybe I should have listened...

http://www.ls1tech.com/forums/showth...es#post6184062

 

Thanks, good info, I'd like to see the flow charts on
the stock 241, 243, 862(5.3L) heads. Anyone have them?

 

I know they are out there. Check LS1tech.com. I remember reading a post where they had stock LS1 and LS6 head flow numbers, and then flow numbers from stock heads that had been ported. It was interesting to see that ported and polished LS1 heads outflowed stock LS6 heads.