DriftingisLame
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942 posts
'91 240sx coupe, rb20det
Eugene OR
2-2-2005
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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
Fast car huh?......You've never heard of my s13? Its the 240 that made the Kessel run in less than 12 parsec's...
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SuperHatch
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872 posts
07 Tundra, VH Powered S14, VH Powered 92 Slicktop Z32, 92 Q45 Beater
Manahawkin NJ
11-17-2006
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| « Re: (DriftingisLame) | 3:14 PM 5/29/2009 |
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| 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! 
- Stephen
http://www.godspeed-racing.com
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elwesso
Super Moderator
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30835 posts
94 Q45t 5 speed NICO Track Slut
Anderson and Angola IN
2-23-2003
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| « Re: (SuperHatch) | 5:43 PM 5/29/2009 |
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its worth at least 10HP if you drive on the right hand side of the carPretty 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.
The Infiniti Q45 Resource, Q45.org | Nissan VH series website
NICO Sponsor Directory | Infiniti Of Scottsdale, 1-888-216-5328, ask for Justin, say Wes sent you.
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Bart
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315 posts
sydney NSW
7-28-2003
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| « Re: Quick Dyno session today (John Dixon) | 7:57 PM 5/29/2009 |
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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.
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Mettler
VH Moderator
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1360 posts
HR31 GTS-8 coupe, VH41/45 Hybrid Transplant
Hamilton
1-15-2006
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| « Re: Quick Dyno session today (Bart) | 10:23 PM 5/29/2009 |
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| 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. |
Have you seen the factory intake setup on a Nissan Pulsar GTIR? It's pretty much like that too... (but obviously sized for boost) You'd build a setup like this much with a wider plenum to fit between the V. Check out these pics:
Then I remembered the Corvette LT5 engine and this engine's intake design wouldn't work too badly designed for ITBs:
Nissan VH V8 > your preferred engine.
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Bart
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315 posts
sydney NSW
7-28-2003
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| « Re: Quick Dyno session today (Mettler) | 7:04 AM 5/30/2009 |
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Nice thanks for reminding me, the GTiR would be a good start but the Corvette style plenum would be ideal for John to clear the hood/bonet
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Carl H
Bio-less Moderator
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4826 posts
1995 240SX SE RB20DET Powered!, 1995 Jaguar XJR...needs paint.
Charlotte NC
8-4-2003
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bhp = brake hp = crank hp.
impressive numbers none the less.
SHift_BOOM. Damnit.
Doing an RB2X swap and scared of the wiring? Check out my thread in the RB section.
Now offering VH and SR/KA/CA conversions!
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John Dixon
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486 posts
300ZX-TT Z32
Birmingham UK
11-16-2004
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| « Re: (Carl H) | 2:19 PM 6/6/2009 |
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The injectors are Bosch 440cc top feeds (type 3 multi jet).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.
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Carl H
Bio-less Moderator
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4826 posts
1995 240SX SE RB20DET Powered!, 1995 Jaguar XJR...needs paint.
Charlotte NC
8-4-2003
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i had been told in past that the plenum of the engine should always be double the engine's displacement...dunno how true that is with ITBs tho.
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Aus450zx
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48 posts
2+2 300ZX
Perth WA
6-5-2009
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| « Re: (John Dixon) | 11:59 PM 6/6/2009 |
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but how can they k| 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...
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John Dixon
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486 posts
300ZX-TT Z32
Birmingham UK
11-16-2004
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| « Re: (Aus450zx) | 4:06 AM 6/7/2009 |
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| 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.
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jbrobatl
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2 posts
Roswell GA
5-20-2009
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what compression ratio are you running? when are you going to fix things and get it back on the dyno?
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John Dixon
Offline
486 posts
300ZX-TT Z32
Birmingham UK
11-16-2004
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| « Re: (jbrobatl) | 5:00 AM 7/3/2009 |
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CR is 12:1.
Hopefully soon, just never have time at the moment!
Also discovered the VTC was not switching so that should lift the top end a bit too when I get it fixed.
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