Post Title: Re: (SuperHatch)
Posted by: elwesso at 5:43 PM 5/29/2009
Good work!
-Max
Post Title: Re: (DriftingisLame)
Posted by: SuperHatch at 3:14 PM 5/29/2009
| Quote, originally posted by DriftingisLame » |
| Man that is awesome, but how are you coming up with a BHP figure? This is on a chassis dyno is it not? Good work! -Max |
Because the "b" is for British Horse Power, duh!
Post Title: Re: (SuperHatch)
Posted by: elwesso at 5:43 PM 5/29/2009
Pretty impressive numbers... 450HP should be EASY, maybe you'll be knockin on 500's doors... I would say most of that comes from the cams...?
What size injectors did you go with, if I recall you went with some top feeds.
Post Title: Re: Quick Dyno session today (John Dixon)
Posted by: Bart at 7:57 PM 5/29/2009
Post Title: Re: Quick Dyno session today (Bart)
Posted by: Mettler at 10:23 PM 5/29/2009
| Quote, originally posted by Bart » |
| Gee mate it sounds great. I can certainly live with that noise for a while. Yeah the air box does look restrictive, you could go for a twin plenum set up similar to what the straight 6 GTR's use. (but the GTR uses a single plenum of course) kind of imagine 2 GTR plenums with 4 intake tubes on each side. |
Then I remembered the Corvette LT5 engine and this engine's intake design wouldn't work too badly designed for ITBs:
Post Title: Re: Quick Dyno session today (Mettler)
Posted by: Bart at 7:04 AM 5/30/2009
Yes, it's crank HP, I never quote wheel HP, it's meaningless. Changing tyre pressures, running in different gears, strapping the car down harder can all change the wheel HP figure significantly but if you do coast down properly you'll always get the same crank hp figure.
Cheers for the pics on the intakes. I'm actually going for something similar to either the LT5 pic or the VG30DETT setup depending on what intake lengths turn out to work best. I'll change it all when the new 52mm throttles go on.
I'm hoping most of the restriction turns out to be in the 2.5" ducting feeding the box as there is a resonable x-section area inside the box its self.
Post Title:
Posted by: Carl H at 9:24 PM 6/6/2009
| Quote, originally posted by John Dixon » |
Yes, it's crank HP, I never quote wheel HP, it's meaningless. Changing tyre pressures, running in different gears, strapping the car down harder can all change the wheel HP figure significantly but if you do coast down properly you'll always get the same crank hp figure. |
but how do you calculate what is being lost through the drivetrain? the measurement is still being done at the wheels...
Post Title: Re: (Aus450zx)
Posted by: John Dixon at 4:06 AM 6/7/2009
| Quote, originally posted by Aus450zx » |
| but how do you calculate what is being lost through the drivetrain? the measurement is still being done at the wheels... |
Declutch, measure coast-down loss then add to the wheels figure to get flywheel. The dyno guy that operates the one I use has run many engines on an engine dyno then installed them in cars and run them on the chassis dyno. The numbers always come out close.
Post Title:
Posted by: jbrobatl at 6:46 PM 7/1/2009
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