Jim- How accurate are those gtech pro's???? I heard that they will give you a lower number than you would actualy get at the track. But good luck and run some 11's!!!

 

THANK YOU PARISH.
you made me look good today.
three years ago i had an idea of building a little monster for fun, again all of my friends laughed at me, and told me it would be a waste of money.
my idea was
4.8 block
6.0 heads
a mild cam work range 1300 to 6000
918 springs
long tubes
and atleast 11 psi of boost
crunch the numbers i was looking at around 455 to 460, after what you just did with a stock 4.8 i now know that with good tune im looking at a little more, no one would beleave that a little 4.8 liter can put out that kind of horse power. but like what you just showed the numbers do not lie.
no matter what i do finish the 4.8 or go to the 6.0 i still need the 4l80e trans,
that just got moved up to the next part to pick up.

 

1000hp should be attainable with the right parts. When it comes down to it, all about how much air you can move through it and use to make power. Someone needs to spin one with a 88 or 91 with 6.0l heads and a forged bottom. It will happin someday, it will take someone who wants to do something a little different and some money to spend.

TJ

 

HEy Jim, think about this. If you were on a mustang dyno, just add about ~8% to those numbers and thats what you would get if you were on a dyno jet. So if you hit just about 500, then on a dyno jet you would be somewhere around 540. Sounds even better to some people. But the mustang dyno is a much better tuning tool for turbo cars.

Rick

 

nice very nice

 

Boy,I guess I was in the woods. I pictured a 4.8 lying in a garage that was hauled- to and run-on a engine dyno. Did you run this in the truck in your sig?

 

ran it in my truck thru a 4l80e and tcase, drove it to the dyno and back home, i really tried to push it. it was a good feeling cranking the boost **** all the way up but it had no effect for the last 25% of it's range.

 

What were your maf readings and IAT's on all the runs?

 

all runs started at 70deg IAT's, the first runs got to only 90deg or so at the end of the run and the last runs got up to 120deg by the end of the run.

first runs were around 50lb/min and last runs were at 60lb/min, not flatlined but bumping the maf limit. i am not using the maf anymore since i am running the megasquirt to run my fueling but i haven't taken it out yet.

 

Thanks, do you happen to have a screen shot of the 455hp 12.5psi run? I want to compare you're curve to my centrifugal curve.