More ISF vs RCF fun.
Nice runs. I'm curious to see how the RCF does once they have headers available. Does the IS-F really have an intake mod? As far as I know all the aftermarket intakes do nothing except rob power or make nothing more than stock.
Lexus Champion
Joined: Jun 2007
Posts: 2,148
Likes: 0
From: Aventura, Florida
Like stated before, an RCF stock for stock and mod for mod is significantly quicker in a straight line. There are many drag races that prove that. As far as bolt ons go, the ISF in this video has I/H/E while the RCF only has exhaust (and larger circumference wheels, which lengthen the gear ratios).
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BTW I love the RCF in these videos. That interior
Pole Position
Joined: Feb 2015
Posts: 2,673
Likes: 408
From: Colorado
I thought I read and saw in a diagram somewhere (maybe here?) that Lexus changed the header design on the RCF, that in effect had the same result as putting on a set of aftermarket headers for the ISF? So I am curious also if PPE/Sikky etc.... will make an aftermarket header for the RCF and if the gains are going to be as significant as they are for the ISF??
Racer
Joined: Jan 2009
Posts: 1,664
Likes: 251
From: NY
OP great video of 1/4 and highway pulls of modded I/H/E ISF vs headers back RCF, pretty much what I though the out come eould be based on but cars numbers. Modded ISF from dig takes RCF, from 60 to 120 even, from some of others high way pulls you seem to have advantage just curious what speed where you going when you did pulled on him.
Racer
Joined: Jan 2009
Posts: 1,664
Likes: 251
From: NY
I also read how they maximized the Header Design on the RCF so will aftermarket headers result in huge improvement can't wait to see if they do great for the RCF, if they don't even better for the isf.
This is just one of the reasons why I'm sticking with the isf for right now just not a big enough improvement in performance overall to justify jumping to the RCF especially considering the price fully loaded with taxes. Does the RCF handle better than ISF yes it does, does RCF have more and newer Tech yes it does, is RCF interior nice oh yes it is, but does it offer massive more performance over my current I/H/E ISF still on stock suspension no it doesn't with addition of some FIGS suspension components a good set of coilovers and new set of RE 11 tires will help even thing up on track.
This is just one of the reasons why I'm sticking with the isf for right now just not a big enough improvement in performance overall to justify jumping to the RCF especially considering the price fully loaded with taxes. Does the RCF handle better than ISF yes it does, does RCF have more and newer Tech yes it does, is RCF interior nice oh yes it is, but does it offer massive more performance over my current I/H/E ISF still on stock suspension no it doesn't with addition of some FIGS suspension components a good set of coilovers and new set of RE 11 tires will help even thing up on track.
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I can't fit in the RC F with a helmet. Not a chance. I barely fit with no helmet at all. There is no RC F in my future, especially when it can't outrun the '11 IS F at VIR in the Lightning Lap.
Intermediate
Joined: Nov 2014
Posts: 289
Likes: 28
From: PA
