works for me

 

I suspect detonation... at 14psi. Lifting at that boost on GM castings is a little low. BTW... aftermarket thick deck heads will not prevent head lifting. Suspecting GM head casting strength has become too easy for hiding other problems... just my opinion...

Bill

 

This testing was done on race gas and a good conservative tune The IATs were under 150. I agree it could be other problems but it was funny how you could watch all the exhaust shoot out both sides of the engine on every pull, Kind of look like a fire breathing SOB.

 

Well, I don't want to argue with anyone who was standing in the room when that dyno pull was actually taking place, but I remember hearing (from two different people that were there) that the boost level was closer to 16-17psi when the heads lifted, and the timing was more on the aggressive side.

Would be nice to be able to see the dyno plots at times like this.

 

I will have to post the dyno sheet on Monday. It was just shy of 700 HP on 14.5 lbs boost . I am the dyno operator and I have looked at the numbers several times and never did it go over 15

 

I had a couple of questions about the power range of Matt's truck. With those mods and the give boost range of the TVS what kind of engine horsepower/torque do you estimate that set up to be at?? That entire combo is very, very close to what I wanted in my truck for a daily driver/work truck (I do tow sometimes, up to 10k).
Simply put I wanted this combo to be at about 500rwhp/rwtq in my 1500HD ccsb. Lastly any guesses on what kind of quarter mile times it would run(I know it's a fat pig)?
I don't have much experience with these things so all of the help is appreciated, thanks.

 

Just out of curosity, I looked up Matt's cam profile from COMP. Its 212/218 at .050 in case anybody didn't know or was curious like I was.

 

sweet! I always knew you were good for something

Note: I would take CrashDummy's word as gold with all matters Magnuson, after all, he is directly involved in most, if not all testing

 

Excellent Cam choice. That is about the biggest blower cam that you can run without bleding too much boost. It even passed emissions In my next build I might consider a 218 224.

 

This may be slightly off topic, but can anyone tell me where Matt got the Eaton E-locker for the front diff in his truck? I've been wanting one to come out for the 8.25" IFS for years. Is it finally available?