I'm not sure that you read the whole thread. Jason said that he talked with Kris, so I am assuming that Kris has the info that he needs on whether to flycut or not. Jason has posted PTV clearance numbers with their cam, so you tell me what is a "safe" clearance and I'll tell you whether he should flycut or not, there are different opinions on what clearance is needed, so a answer is hard to give, it's borderline.

 

Jason,

1- I never made any claims that it will not "clear" the pistons. Like not allowing the motor to turn.
2- the clearance margins you just mentionned (72/87) are below "SAFE" street tolerance margins. So I was right.
3- factors affecting margins:
A> Rod stretch can easily be .030
B> Out of hole position can vary by .003
C> Compressed gasket thickness can vary by .003
D> Chain slack (affecting advance or retard)
Just as a paper exercise take those factors into consideration and see where your margins end up. Keep in mind that every motor is different.

.072- .030= .042 (Bolt stretch factored in)
.087 -.004 - (.030)= .053 (bolt stretch and LSA clearance factored in)

So you can end up with as much .042 intake/.053 exhaust actual PTV.
(I haven't taken into factor any exhaust valve stretch from nitrous use that some use with that cam.)

That is "TIGHT" for street use and a hint of valve float, timing chain stretch, off degree install etc... can spell valve contact.

That is what i'm saying by not safe for street and that is why everything should be checked and measured and degreed.
Still in my opinion, flycut would be wise.

No shoot me if I'm the cautious type, that is a cam that spins beyond 6600rpm.

Smoking is harmfull to your health, yet I stll do it, but i know the risks and I accept them.
That is the morale about this all.

Those facts should be explained to everyone, this is where I come in because I am not worried about explaining that to all.

I never bashed TSP, quite the contrary, but I am not afraid to voice my opinions.
TSP is doing a good job providing power options for LS1 community and I hope it continues to do so.
Not everyone is as experienced as others, but everyone deserves a chance to know the reality of what their getting into.

That will be my last post in this thread, my point is made, there is no more to be gained but bashing and trying to discredit one another. I do not care to do that.

 

Pred, Thank you again for all of your imput and time.


Jason, thanks for going 1 on 1 with me today to fill me in.


No I do not need to Flycut. Could i just to be safe? Of course.

When the car will be tuned, this cam will not spin over 6350 if I can help it.

For any of you interested. Ill be keeping everyone posted with dyno numbers and track times.

My goal is low 400's with the A4, and low 11's on the track.

Case closed, I know the risks. Im ready to face whatever happens..


Thanks everyone!


-Kris

 

If it were my motor, I would definately be measuring PTV clearance and degreeing the cam just for safety's sake. I personally don't like the way that TSP handled this. The site has a private messaging system, use it.
AJ

 

holy hell where'd these ***** come from?

 

Came with the cam package....

 

just glad to see your gonna come out to the cruise next weekend....saw 300 the other day to...movie kicked ***...

 

 

Man that sounds mean! I have the MS4 on a 111 LSA and that's nasty as well. I asked TSP about the 110 LSa and they didn't reccommend it so I just went 111...

 

 

any updates on this?

 

Tried to do the base tune but the MAP sensor was freaking out. Thinking it might have to do with my PCV and CCV setup..

Any idea's guys?

 

predator is the man, if u dought him u should sell your lsx motor and get something different.im with predator the clearences are to close for the street.think about what might happen if u miss a gear or overreve your engine. tsp was right when they said it would fit. call a few other sponsor that build motors, ask for piston to valve clearnce that they recomend,no need to tell anymore info just ask for the clearence numbers, and lets be real tell them u going to turn it 6800 then post some numbers for us to see. remember its a street car not a trailer drag car.

 

heres one for ya. call tsp ask how much HP u will pick up if u flycut put thinner headgaskets on and maybe mill the head a little.since u need to flycut anyways. i bet u get at least 30 more ft pounds and 35 more hp,and it wont cost much.

 

wow!!! I hope those ***** that came with ur cam dont break when pistons crack, cause that means u hit bottom buddy. this is one of two you dont ever want to hit bottom. good luck.





fuerzaws6

 

LSA determines overlap for the most part and where does overlap occur? Umm at TDC, so the more overlap the more time the valves will be close to the piston at TDC which increases the chances of crashing a valve.

 

X 1000

Listen to predator, he knows what hes talking about. Overlap amount is the primary factor in PTV issues.

 

Youre way out in left field man.

 

You need to read up an valve events man. That .664 max lift happens when the piston is at the bottom of the cyl bore. You max lift has very little to do with the lift when the piston is at TDC.

 

LOL, the sponor himself claimed that the PTVC is lower thwn the general industry acceptable standards which are .080/.100 PTVC. Aint nothing wrong with pointing it out. if you still want to choose big cam like those, regardless of the vendor, then thats you problem, but at least you are armed with the facts, do what you want with them.

I guess everyone is not allowed to question sponsors since they are gods for paying $150 a month to be sponsor. maybe ill start paying $150 a month and Ill start pimping **** out and nobody will be allowed to dare question my integrity because I will be a sponsor.