If one more person mentions TF 225s I'm making the call. They obviously work well with the G6(5)X3 cams and spins cam.

CAMMEDC6, have you ever thought of a NA meth kit? And are you stock bottom end? If so that 9.7 @ 14x is even more ridiculous

 

Never thought about a na meth kit. Yes I am still on stock bottom end. I pray every pass. Hahahaha.

 

I pray too every time I get a 1.5 60... But for my rear and trans, not my bottom end!

 

yea...knock on wood i have only broken a half shaft and ruined a mcleod clutch...

 

The bottom shell of the FAST 102 that you put up to the heads has a bigger opening than the tube runners that you removed. The port match is in making those runners ported to the bottom shell without taking off any material at the opening. I use such a mild grit sanding roll near the opening that it doesnt take off anything meaninful.

Anyway, the porting of the tubes is meaningful as they are 1/16" off around the entire opening along the sides. I also straighten the floor out with the run from further inside.

Here is the picture of the runner in the tract showing how it is smaller than the part you placed on the motor. The seam mating the two haves of the runner tubes is worse than the pictures show.



Some but not all of what I do is here. The edges are high speed buffed but no material is removed so it doenst have huge gaps of the head acting as a barrier to airflow. Once a runner is ported, that tube is essentially married to the floor by shape and I dont think it should be moved. There is some play in how they fit so it shouldnt be moved.:



It takes skill like throwing a baseball does. You can grind through the plastic and screw it up in a fraction of a second. Some of what I do further up is going to remain with me for a while until get some more dyno verification of what I did. I was pretty shocked at the amount of material that comes out of where that ridge is. You have to blend it forward 1" and back about 2". It actually loses more than the amount on the stock runner and it doesnt change the dimensions at the opening of the manifold!

Here is a thread with a full look at this LS2 version FAST 102:
http://forums.corvetteforum.com/c6-t...2-version.html

 

On the 102 there was some Casting flash that had to be removed from
the main opening. Not much but just enough to cause air spin. I think it took about 1 Min to remove that and I wouldnt say the opening was ported.

The Runners you mention are definately the case with the upper portion or
Horn section has variation and you can see the difference every time you put it in and out. I know when I put it back together the upper shell didn't
fit back on because runner #7 came out first and and went in last front to back. I soon realized that runner #7 was in the wrong position. They are all the same except #7 which has a accomodation to accept the upper shell. I found some other things I will share with you.

 

I guess that means Im not needed for any porting this time around.

 

The fact that there was no problem with the FLOOR in using the 102 has
my head spinning. That being the case the 90/92 could benefit from what
you mentioned earlier as A additional consideration in porting any older units by correcting the problem with the Floor and collecting some data points. I wont know If I benefited from the 102 just because it PORT MATCHES well till I get to A DYNO. If I notice a SOTP I will post that up
right away.

 

interesting

 

MOST INTERESTING INDEED. I'm just lucky I have the both manifolds &
OEM HEADS & TRICK FLOWS. I Lie I also have A PORTED OEM which made good numbers. I just held on to it and will probably sell it.

 

That was the question in mind all the while. Was the 102 better than the
the 92. The answer according to my butt Meter says YES. Here is what I noticed from the time I fired it up about 1 Hour ago.

1. At startup there were no issues as it fast idled at 1100 RPM. It did seem to idle a tad bit louder than before and seemed to have a good snap at the touch of the pedal.

2. At warmup the idle dropped to 800 like it should as I checked for leaks, funny noises and possibly hunting from the presence of air leaks. Earlier when I was torquing the manifold down there was a loud crack like A firecracker and the bolt kept turning like I broke it or cracked the manifold. It freaked me out. I turned the bolt out and it did not look like it broke or stripped so I put it back in and it torqued down fine. I think it may have missed the hole in the head and wend along side it but it sure freaked me out. this has happened to some who did not change the valley bolts.

3. The drive at slow speeds was the same as before and when I gave it a shot in 1st, 2nd, & 3rd seemed to have more torque instantly down low. Did not have it over 4800 RPM on this initial test but I can feel it
maybe 15 or 20 at the most is what I figure.

 

When's the next dyno session with the 102?

 

I hope ASAP. I have some clutch issues I need to attend to, then another more aggressive road test. Im looking for more HP/TQ from the 102.

 

Good Job Leon!!

 

Flush the heck out of that fluid before and after each drive, flush it two or three times and pump the clutch a lot between each flush.

And take out the pedal spring.

You might be able to bring it back and it's nearly free to try.

 

nice numbers, should be good for an easy 10! Are you gonna try it on the stock clutch?

 

Yes I will try the Stock Clutch. I have the LS7 clutch that came in the 07 Cars. The Fluid change was like magic the last time and I hope it brings it around. Not ready for A clutch change yet. The expense is $2,000 for
A item we take for granted. Im thinking 520RWHP/470RWTQ is the most I could expect out of that baby LS2. I am well satisfied reaching the 500 Mark and the 4.10 gears make it a mean lethal animal.

 

You will need more than one fluid change Leon, trust me.

You are going to be at the limit of the stock clutch IMHO based on my observations of nodded c6Z's, but you should be ok for your use. My friend Retrotech had 550/460 in his Z on the stock clutch and ran 10.68 @ 133 and got 1.5's on the stock clutch. At that power level the clutch is the weak point and cannot handle harder launches or the pedal just falls to the floor if you try to launch harder.

He is a hotshoe driver, but it gives you something to shoot for.

Here is a vid. I never get tired of watching it. Lol.

 

Yea the vid is awesome . The Car would have to be yellow as I can only imagine it as mine. I will give the Clutch some serious attention before any more agressiveness. If it needs on so be it. I will get A aluminum flywheel then and A ls9 Clutch.

 

In the install of the FAST 102 I discovered A few installation tricks to make this baby go on smooth. If some members are interested let me know and I will do a write up on it. Here are A couple of Pics Just prior and after
installation. I think it has A nice look and did not see any need to paint it. I painted my FAST 92 to obscure the installation and make it look stock for
possible warranty considerations. Here are the Pics.