Dynoed 1170hp/1180ft/lbs today.
#1
TECH Regular
Thread Starter
Join Date: Aug 2007
Location: Sweden
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I dynoed my 6.0 in a superflow sf-902 engine dyno today.
6.0
9.8cr
E85
S480 1.32/ar turbo
And it made 1170hp/1180ft/lbs at 30-20 psi (dropping on high rpm to loose wastegate springs). And to small intercooler (194 intake temp).
Backpressure is 1:1 compared to boost![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
But a problem: I couldnīt rev over 6800 rpm, sounds like valvefloat or lifterfloat. I use PRC dual springs kit and LS7 lifters.
What do you think my problem is? I need to rev 7500 rpm.
6.0
9.8cr
E85
S480 1.32/ar turbo
And it made 1170hp/1180ft/lbs at 30-20 psi (dropping on high rpm to loose wastegate springs). And to small intercooler (194 intake temp).
Backpressure is 1:1 compared to boost
![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
But a problem: I couldnīt rev over 6800 rpm, sounds like valvefloat or lifterfloat. I use PRC dual springs kit and LS7 lifters.
What do you think my problem is? I need to rev 7500 rpm.
#4
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Not bad.......that turbo will do around 1200-1250 max. We are working on the new Billet 82mm version of that turbo. Should have it ready soon......its rated at 127lbs/min. Upgrade to the 80mm ETT.
Also like Phil said...spring pressure might need to go up.
Also like Phil said...spring pressure might need to go up.
Trending Topics
#9
#13
TECH Regular
Thread Starter
Join Date: Aug 2007
Location: Sweden
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I donīt run mls gaskets. I have done what we do on all euro engines to make the head seal. We mill down a ring around the cylinder with a cutting edge that cuts into the head. Also known as "pyramid rings" and "fire rings". Then you can boost as much as you want![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Some pics:
![](http://www.pure-pf.com/nova/12.JPG)
![](http://www.pure-pf.com/nova/13.JPG)
![](http://www.pure-pf.com/nova/14.JPG)
![](http://www.pure-pf.com/nova/15.JPG)
![](http://www.pure-pf.com/nova/16.JPG)
![](http://www.pure-pf.com/nova/17.JPG)
I think itīs good with stock block/crank/853 heads
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Some pics:
![](http://www.ulfw.se/Kjula_080920/DSC_1887.jpg)
I think itīs good with stock block/crank/853 heads
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#14
TECH Regular
Thread Starter
Join Date: Aug 2007
Location: Sweden
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
#16
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I donīt run mls gaskets. I have done what we do on all euro engines to make the head seal. We mill down a ring around the cylinder with a cutting edge that cuts into the head. Also known as "pyramid rings" and "fire rings". Then you can boost as much as you want![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
I think itīs good with stock block/crank/853 heads![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
I think itīs good with stock block/crank/853 heads
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![Icon Confused](https://ls1tech.com/forums/images/smilies2/icon_confused.gif)
So what gasket do you run?
Also I'm surprised it took 30psi to get those numbers out of a 6.0L, I'm even more surprised it stayed together doing so.
Last edited by sciff5; 10-01-2008 at 02:06 PM.
#19
TECH Regular
Thread Starter
Join Date: Aug 2007
Location: Sweden
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
We also sell this type of gaskets to BMW,Volvo and now LS1
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
We also made this type of European fastest 4 cyl car, 7.20@190mph.