Have you guys seen this already???


http://www.camshaftshop.com/camshaft...exus-camshaft/

 

Hmmm....VERY interesting! Thanks for the link! Wonder how much TQ/HP increase they see with the "street" grind?

 

They're in New Zealand. I'd also guess those are specifically for the pre vvt-i 1uz engine (u to 1997)

 

I have an inquiry into them. These would certainly make a nice addition to the forthcoming headers!

I wonder what effect, if any, the VVTi will have on the profile selection. Maybe it will mean that one can choose a slightly "wilder" profile yet retain low end torque. (yummy)

 

Good point Dave...wondering how different cams would work with the complexity of the vvt-I and the ECU management system?
One positive is the exchange rate to U.S. dollars-the cams would be more like $12-1300 plus a couple hundred for shipping. Upgraded valve springs and other items might add a few hundred more. I'd like to see some dyno charts...

 

Yes, those cams are for the pre-V VTi engines. You could possibly delete the V V Ti by going to older heads but I doubt many would consider that option. For the time being the only option would be to send stock cams in for welding and regrinding or regrind on a smaller base circle.

 

has anyone consider camshafts from a toyota tundra, basically same engine.

 

The VVT-i will add or retard timing so these cams aren't needed. The tundra engine is base on 4.7L just like the LX470.
JP Importz

 

Hey JP....

Why would the cams not be needed? More lift=more power. Cam timing is indeed adjusted by the VVTi but it does not control lobe lift or duration. More duration = more top end power. What I wouldn't give to have my Lexus pulling like a freight train at 5500+! Redline 7500 all day....this motor would live and take it.

Basically I think this engine has alot of potential but I wonder if the ECU will (like the FI guys) be the limitation for the V8.

Basic premise here is that if the headers do work out nicely for power gains why not look at the camshafts? It's perfectly conceivable to obtain close to 400 flywheel HP on "nuts" alone. Headers, Cam, Intake....all working beautifully in conjunction.


Again....what affect do you guys think a slightly wilder cam profile would have an a VVTi equipped machine?


I think I need to read the VVTi post again to fully understand how the sytem works but in theory it would make a wilder camshaft more streetable, no? PLUS....allow the "dark side" of the force come thru at the higher RPMs.


It's disappointing to hear that the master billets this company has appears to be only the non VVTi type, but we'll see.


I also like the 4.7L cam idea. In theory Lexus may have made the cam a tad bigger for the larger mill? Maybe not...maybe they just wanted more <grunt> from the added cubes.

 

The only cams avalable for VVTI models are built by HKS and you need their Valcon unit to control the timing. Otherwise, good luck trying to run it.

 

i have heard of non vvti tundra cams being put in to the sc400 non vvti v8.