rselby

was looking at some pics...looks like the RCF air intake would fit a ISF ( looks like a plastic joez ) , and the rest of the intake looks really close if not the same as an ISF, so if that car can make 467 hp with this, the ISF stock set up is really pretty good, as they didn't change it much( from what it looks)

NotnFsport

iTrader: (10)

Didnt change much? The engine changed alot to gain my hp and torque .

MisterSkiz

iTrader: (2)

Its pretty much the same as OEM IS-F intake...

Jowett

Throttle body is up to 84mm, so it's very likely that the intake tube and airflow meter have an increased diameter, too.

lobuxracer

iTrader: (2)

All new heads, different port design, all Ti valves, the list goes on and on...I am really surprised they left it the 2UR-GSE designation.

I8ABMR

I am looking forward to taking a test drive. I have a dealership very close by

Sylvan

iTrader: (6)

Can anyone confirm the size of the RCF throttle body?

j3ff

Jowett is correct according to lexus.com. About a quarter way down there's some detailed differences which makes for a good read!

http://pressroom.lexus.com/releases/...oduct+news.htm

2URGSE

Compression bumped up from 11.7:1 to 12.3:1

idoke1

iTrader: (5)

I wonder if the rcf's throttle body will fit on the isf? If so, would there be any difference?

Jowett

I have an RC F unit here, it measures 84mm, it will not bolt up to the IS-F intake manifold. The holes could be filled, the pattern redrilled, and the bore ported to match. The picture shows the a 76mm t-body bored/honed to 80mm, and the stock 84mm unit. The 80mm unit gains about .10 second in the 1/4 mile on a supercharged Tundra.

Sylvan

iTrader: (6)

Thank you I appreciate the help, I was thinking about the RCF throttle body for the ISF, what size it a tundra throttle body? And will it bolt up to an ISF? I have a ported intake manifold so I think a larger throttle body would help maximize its gains. For that matter the larger MAF might help too.

Thank you for the help!

Joe Z

iTrader: (10)

Me TOO..!!!


~ Joe Z

Jowett

The Tundra/Land Cruiser throttle body is the same in every way except for the location of the coolant passage.

IMO, call it a 2UR-GSE blue top. The 4A-GE had several generations which received nicknames to differentiate them... as many know, those names came from the different colors of the valve covers that each generation received.

Sylvan

iTrader: (6)

Thank you, I may have to try to get my hands on an RCF throttle body and retro fit it. Any ideas who sells them out side of Lexus dealerships?