nice comparison. Only problem as you stated, the GSF is over priced. how can you want to get into a GSF when a very gently used f10 M5 is the same price. RC-F competes nicely with their segment. i can't say that with the GS-F. GS-F is not a pretty car from the side or back but the front is beautiful. It has potential but for a stock car, it doesn't look too great.

 

Most definitily weight plays a factor! This video says they are both stock and, they seem to know each other. GSF has a passenger for sure and still pulls

 

This just made me want to switch. I need to now anyway, baby on the way!

 

thanks for the write-up

 

This write up is inspiring. I need to do an ISF vs. GSF comparison. From a features perspective, the GSF will be easily the hands down winner, but from a mechanical performance perspective, I have a suspicion the ISF (with the OS Giken LSD and polyurethane bushings) will come out ahead. I followed the wife up an on ramp I know well when we drove home from Lexus, and I could have easily pulled past her...It is a dead straight drag race on ramp...

 

^, man, ISF still looks like a good sport sedan to beat for Lexus !

 

Having had both as well (GS-F and IS-F), I'd be interested to hear your thoughts

 

I too would be very eager to read your comparison on a stock GS-F versus your modified IS-F.

I've been extremely curious to hear from an owner's perspective on how the mechanical OS Giken TCD compares to the electronically-controlled TVD from a performance standpoint.

 

OK, for those who are saying that the GS-F and IS-F pull or are faster than the RC-F. Go to the 0:54 of the YouTube video.

 

I have both the GSF and the ISF in the garage. Just need an RCF to see what's up. The ISF crawls up the GSF's bumper in a drag race uphill - already BTDT. Also, individual cars can vary significantly for a number of reasons, and cars delivered by manufacturers for testing are often tweaked to make certain the outcome they want is what happens. The red hardtop '93 Supra TT delivered to Car and Driver was the quickest and fastest "stock" Supra in history. Some say it had a special ECM that went back to Japan immediately after testing. Others say the cats were not present for duty despite appearing to be. Whatever the case, no other Supra tested by any other magazine was even close. So, I always take these things with a grain of salt. I'd be a lot more likely to trust videos from the local drag strip as representative of what the public can buy.

 

Lance

Your wife must really be fun to live with

Lou

 

The isf is in auto and the other two are in manual, not a good comparison. All three cars have similar straight line performance. Now track performance and dynamics is where they are noticeably different.

 

The video clearly shows the driver was paddle shifting. And how do you know what the RC-F was not ran auto? Were you present during the drag race?Give it up. I had an IS-F as well, a fully bolted one. I know full well how an IS-F performs. The RC-F will walk away stock to stock in a drag race. I am not even going to argue the track performance with one being one generation behind. And I have seen those track numbers in magazines. I am not in magazine racing. The GS-F and RC-F with TVD are probably even on the track..

 

Relax man, I'm just looking at the gauges from the video you posted, no need to be there.

 

The opening video clearly shows the ISF in D, not M. Pretty obvious they didn't go for broke in that comparison. I will be happy to argue the track performance. Look at the Lightning Lap numbers. No street legal Lexus F car has circulated VIR faster than the 2011 ISF with the exception of one LFA. Between the time the RCF and the ISF were run, they widened the track and removed the tree at Oak Tree which has made later editions of the LL cars faster. Even with this advantage, the RCF has failed to beat the ISF. No question about it.