So the LS6, LS1, and the LQ9 heads all net about the same power? That's kind of weird. There should be a measurable difference between the LS6 and the LQ9's. The both flow about the same, but nearly a full point difference in compression.

 

The springs are probably Ok. I just don't like running single springs. If one breaks, there goes the valve down into the cylinder. With the double springs, you have one to hold the valve up. Even though you will probably still valve float if one broke and the valve may still hit the pistion, that is still better than droping a valve all the way down into the hole. It gets nasty then.

 

Thank you. I'm on a learning curve here.

 

Good point about the springs. What about the TB and LS6 manifold.
Sounds like the LS6 heads, cam and manifold should be a good set up for now. I know that the LS6 manifold is better than the LS1 manifold. Are my stock pushrods and lifters ok with Z06 cam? I think I'll go for new rockers though just for peace of mind.

 

The LS6 pushrods are a different length than the LS1 motors. So you will need some new pushrods for the LS6 cam. If you are buying a new cam, there are other cams that are a little better than the LS6 cam. But this LS6 cam isn't' a bad cam.

 

If you re-read my original post I suggested to run the 317 heads only if you were going to run a lot of boost, which is not what a Maggie was built for. I only mentioned the 317 heads because he could possibly change his mind and get a ProCharger, which is capable of running big boost. Furthermore, I suggested that he port & polish his stock heads or get the LS6 heads and port & polish them, as porting and polishing his stock heads would be more economical. A blower specific cam paired with properly ported and polished stock heads would make around the same power as an LS6 headed/LS6 cam combination... , "I would suggest having your stock heads cleaned up a bit, possibly ported & polished, and not mill them any to retain the lower compression ratio. If you know you want to run with a lot of boost then I would suggest the 6.0L LQ9 317 heads, they have 72cc chambers and will lower your compression close to 9.1...from what I recall. However, from what you posted I believe you will be happy with the P&P stock heads, with a blower specific cam, and the stock out of the box Maggie..."

No need for the BS flag...because my comments are right in line with yours and none of it is BS... Hope this helps...


flasunshine1, yes if you went with a blower specific cam and had your heads ported & polished then when you were ready to install the Maggie you would be good to go. As far as springs and rockers, most of the companies that I suggested for a blower specific cam, (LG, ECS, and A&A), sell the cam with a cam kit that would include new pushrods, springs, retainers, locks, etc. Your springs will depend on how much lift your cam has, although double springs can be installed with a lower lift cam just for extra added insurance and valvetrain stability. As far as the rockers you could send them to Harland Sharp to rebuild your stockers or if you had the extra money the best set is the Yella Terra Ultralite 1.7 rockers, but they are around $450 a set. Lastly, changing the oil pump is extra insurance and peace of mind as well, since you are putting extra strain on your motor with forced induction. Also when you install the cam, the oil pump is right there and you might as well replace it with a newer ported LS6 unit or a high volume Melling unit. Hope this helps...

 

Just pulling your chain there bud. But you did suggest him to run LQ9 heads, and there was NO MENTIONING of a Procharger. Running low compression on a Maggie is a waste. I learned this the hard way. You can still run around 10 psi of boost with 10.1-10.5:1 compression (As long as the motor is tuned right). Especially if you want to spray some METH with it. I talked to Andy at A&A and he is running 10.5:1 compression on his LS7 with boost, and made up to 900 RWHP. It's all in the tune.

 

Thanks for all the help here on the forum. You guys are great. This post probably saved me a lot of trial and error not to mention wasted money. I will get dyno numbers for you all when the H/C swap is done.
Thanks again.

 

We are right next door, I recomend 6.0 truck heads with the larger chambers for a lower compression ration & they are meaty for porting. If you want Patriots, I am taking a set off my personal car I will sell at a great price & they have brand new comp springs on them. We are a Maggie shop also & do them all the time. Give us a call & speak right to the Maggie techs on staff for all your questions answered.

813-628-0080

 

 

oh BTW..you will need a new hood....

 

Maybe he should get the Pro-Charger instead? No hood clearance issues there.....

Just Lucky, totaly agree w/you.

 

go with the 317 heads which flow a little better than z06 heads, have them milled to the 66.5CC of your stock heads, and run the boost level recommended for the ls1 and not the ls6. You will make more power and be less worried about blowing your motor as many Z06's have running ls1 levels of boost.

 

 

Yeah but the beauty of 317 heads is they start out with 72cc chambers and could be milled to whatever compression he wanted, they are also cheaper and flow the same or more as 243 heads.

 

PM about the heads. What Compression are they? How about the cam?I already have an ACP Magna Extractor hood in my storage. They really look BAD!