Lexus 5.0L Daytona Prototype Engine Dyno pics
- Thread starter JBrady
- Start date
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I haven't thought about this old post (in fact had forgotten) but yes, that certainly does look like the stock (externally) OEM 1998+ VVTi intake. Probably heavily ported and the internal butterflies either open all the time or removed and ported for the shorter runner design.
Not sure if they are running the VVTi or not. Actuators may just be locked. Personally, I question the outright performance aspect of the intake only VVTi.
It would be nice to adapt this later intake to ealier heads and see what gains are in the intake itself.
Another previously overlooked (by me) observation: looks like cylinders 5 and 7 are paired on the exhaust. These are overlapping exhaust event ports with stock cam timing. Even more interesting is this was done on the S&S headers as well due to packaging limitation. Pairing overlapping ports at first seems like a mistake but some do it on purpose depending on design.
Will have to review Erol's pics to see what he did.
Oh, and if you look closely you will see even the large diameter exhaust vent piping well after the headers is glowing. This was definitely endurance testing.
Sorry for the slow response... they were posted in the Club Lexus Gallery by flipside909
I haven't thought about this old post (in fact had forgotten) but yes, that certainly does look like the stock (externally) OEM 1998+ VVTi intake. Probably heavily ported and the internal butterflies either open all the time or removed and ported for the shorter runner design.
Not sure if they are running the VVTi or not. Actuators may just be locked. Personally, I question the outright performance aspect of the intake only VVTi.
It would be nice to adapt this later intake to ealier heads and see what gains are in the intake itself.
Attachments
Here are a couple pics of some endurance dyno testing of the Lexus motorsports 5.0L engine:
HP: 500 (regulated by Grand Am)
Bore: 3.702"
Stroke: 3.5"
Compression Ratio: 11.0:1
Max rpm: 7000
Cam Lift : .478"
Cam Duration: 260 degrees
Another previously overlooked (by me) observation: looks like cylinders 5 and 7 are paired on the exhaust. These are overlapping exhaust event ports with stock cam timing. Even more interesting is this was done on the S&S headers as well due to packaging limitation. Pairing overlapping ports at first seems like a mistake but some do it on purpose depending on design.
Will have to review Erol's pics to see what he did.
Oh, and if you look closely you will see even the large diameter exhaust vent piping well after the headers is glowing. This was definitely endurance testing.
Attachments
Where did you find those pics????
That is the TRD dyno cell that the pics are taken in...
Don't ask me how I know
Sorry for the slow response... they were posted in the Club Lexus Gallery by flipside909
XR6 Turbo
Reminded me of this pic:
Youtube link to the same engine:
http://www.youtube.com/watch?v=VUWCo3lDjH8
Some like it hot!!!
Reminded me of this pic:
Youtube link to the same engine:
http://www.youtube.com/watch?v=VUWCo3lDjH8
Some like it hot!!!
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