G5x3 requires no flycuting on a 112 with stock heads. Why would lsa determine whether or not you fly cut? I thought it was lift that determined if you flycut?

 

X3 on a 112 will fit but is very tight and flycutting is recommended.
The LSA/ICL will change the VEs, therefore changing Int. valve opening and Exht closing which could then interfere.
Lift has nothing to do with PTVC as it occurs close to BDC and not TDC where problems arrise.

 

Predator-Z, will the cam you mentioned earlier in the thread clear with stock heads and not require fly-cutting? The numbers you predicted your grind to gain over the G5X3 where right on.

 

It should clear, but you know how it goes, better measure.

 

I'm really interested in this setup. I've looked at a lot of cam profiles in the last year, but I wanted to maximise the area under the curve. Initially I ruled out the G5X3 for my needs, but I'm totally ok with making clearance for a tighter LSA. I assume thats a 108 LSA, 104 ICL?

Would run this with 59cc AFR 205's and would also be interested in the LG F-body headers I've heard about.

 

That would be a bit tight advancing it +4, too much IMO

 

Ok, that's kinda what I thought, but a 106 ICL is not all that uncommon. So how about a 108 +2? I guess the IVO & IVC is the same whether I would do that or a 110 +4.

 

Hey Lou-not sure if you saw it yet on the other board..

471rwhp/410Tq without FAST90/90!

http://www.z06vette.com/forums/showthread.php?t=102517

 

I am willing to bet you'd have seen a few more rwtq with the LG Pro Long tubes. SAE 460/420 to the wheels. JMO. No 90/90 here either.

 

Will the G5X3 work on AFR 205's unaltered right out of the box??
Right now I'm running the AFR 205's w/ their AFR 224/228 @ 114..
Thinking about changing to the G5X3

 

This question was answered in Post # 8, Post # 23, Post # 33, Post # 40, 41 & 42

AFR 205 heads have more clearance after getting milled to 59cc than a stock head. Your unmilled heads will clear by an even larger margin.

:sarcasm: I'm sure Lou is glad everyone has taken the time to read his informative posts, rather than continuing to ask the same questions over and over again. :/sarcasm:

 

The only thing I am unsure of is...Why does the G5X3 cam cost $50 more than the MS3? I'm about to pull the trigger on a cam, but I can't justify the $50 between the two cams.

Also, here are a couple dyno sheets to give you an idea of the differences in power between LGM's G5X3 and TSP's MS3 (both stock heads):

MS3:


G5X3:

 

This is the first time I have heard of this. How is this possible? Every other G5X3 with 59cc AFR 205's has had to be flycut quite a bit.

 

If I remember correctly, that graph you posted is of a customer who owns a 2001 ZO6. Not a good comparison to a Z-28 IMO. The ZO6 has higher compression, better stock heads, and less restrictive exhaust. All in all these 2 cams perform nearly identical. Only a few hp/tq difference with the winner being LG's x3 cam. What people are missing is that Lou Gigliotti's LG Pro Long Tube Headers "the most powerful header on the planet" makes the biggest difference. When you add Lou's headers vs some of the competitions headers that is where the biggest difference becomes obvious. I am very glad I went with LG's cam and exhaust, but wish I'd have went with the g5x4 and stayed cam only. JMO FWIW

 

I saw a bunch of Z06 dynos in there, too. But I'm pretty sure I grabbed a C5 dyno. If I didn't, my bad.

But what happened to my other post? I had another post after the one you just quoted. I am just curious as to why the LG cams cost $50 more than the next competitor's cam?

 

I'm FAR from an expert, but here's my take on why LG cams are a measly $50 more:
Because you can charge more when you put out a quality product that people will pay for. And because of the years of research. Well, that and the fact that they charge extra for profit, of course. I've seen lots of cams locally and the G5X cams are very good cams. Most who have seen them run are willing to pay the extra $50 for the performance. Have you ever seen how well these cams perform, up top and down low? They don't have the bottom end sacrifice as badly as most competitors due to the extra timing. I decided it was worth it after seeing a few friends run them and seeing their power curves which helped me decide that it met my needs. And since cam manufacturers grind in extra timing (and I've even heard of other features although I don't know enough to comment on them) it can be hard to make an exact copy. So for me, I was willing to pay the extra $50 to get a cam that I watched do what I want a cam to do, for sure, instead of taking a chance on a custom ground guess, or a competitor whose cams I hadn't seen enough good from in person. I'd seen LG cams (the G5X2 and G5X3) perform well enough to trust their cam.

We used a degree wheel and a dial indicator to measure all the dimensions of my cam when we put it in, and I'll say that the measurements were to accurate that LG obviously has stricter quality standards than other manufacturers. I have 2 buddies with the same name cam from another maker, and there are widely varying measurements on their cam cards, showing that some companies aren't as strict about what they'll accept from Comp's grinds.

 

Thanks bro... I'm assuming a 114 will clear even more..

 

Hey bro, that graph should be Jim Sharp's car. It's a C5 ZO6. Not the C6 Z. Anyways I agree with you on the 50 buck difference. Worth every penny.

 

Would there be any noticible difference by switching from the MS3 113 to a G5X3 112?

 

ttt i would like to know also