Weapon F

I want to start this thread by first saying I'm not out to bash RC-F or M4 they are both fantastic cars. I'm very interested on how IS-F stand up against these two new beast. So let's look at some numbers. In order to keep data as accurate as possible, I took data from Motor Trends review of IS-F, RC-F And M4 I didn't want data from two different sources

RC-F IS-F M4
0-60mph 0-60mph 0-60 mph
4.3 4.3 4.0
1/4 mi 1/4 mi 1/4 mi
12.7 112.2 12.7 113.4 12.2 117.8
60-0 Braking
107ft 105ft. 98ft
Figure 8 Figure 8 Figure 8
24.9 0.80g 24.8 0.79g 24.2 0.84g
lateral acceleration
0.92g 0.96g 0.98g
On streets of willowspring RC-F vs M4
1:24.05. 1:23.73
that's a difference of three tenths between RCF and the m4. Even though M4 had better #s in all categories RC-F was able to hold its own on track and nearly caught M4. Thank tech for allowing RC-F to make up some lost ground to bad it's not lighter.

What I find even more interesting are numbers between RC-F and IS-F there almost identical actually IS-F has better numbers of two if you go by MT , even with all new tech torque vectoring differential, track modes, bigger brakes, better chassis suspension and steering.

I do believe RC-F will have better steering, handling, chassis feel than ISF, the in RC-F interior blows away ISF all the new tech is fantastic. And like IS-F it has it own unique look love or hate it.

What hurts the performance of the RCF? ONE thing and one thing only 400 pounds of extra weight. You can get around it no matter what. This goes to show you all the tech in the world still can't get around that excess weight. RCF weighs more than GT-R, now that tech did help in keep it just 3 tenths slower than M4 at willowspring but imagine how it would do if it were just 300 pounds lighter.

So I'll just hold on to my ISF for now with my current mods of headers, exhaust and intake, and being 200 lbs lighter, just on pure performance numbers alone my ISF is right in par with stock RC-F and if I add some Fig's suspension components along with a set of KW's coilovers that's when it get interesting.

Weapon F

RC-F VS M4


Matt Farah RC-F

digger08

iTrader: (1)

Nice!...thanks for the refreshing read

It such a subjective thing that people will argue about until the end of time.


Digger08

MRxSLAYx

In all honestly, I dont see an RCF beating an ISF in the quarter mile or a roll race due to the weight. Ive ran 2 m4s randomly on the highway and pulled away after 120(just like I did with the older m3s), but those runs were spur of the moment and shouldn't really count as the standard.

From what ive been reading, the RCF should definitely be very quick for its specs on the track though.

I8ABMR

physics is physics. 400 lbs will take some serious tech to hide. Even the GTR cant hide that kind of weigh and that thing has pixie dust and fairy dust sprinkled all over it. The RCF is a porker.

Weapon F

Classic I knew it had nothing to do with twin turbos and awd. Now if I could only get my hands on some of pixie dust and fairy dust I'll show those damn GT-R. Hey isn't there Co that's making OBD2 PFD (Pixie Fairy Dust) download that re flashes ecu.

primecut

iTrader: (1)

There must be an ISF owner out there who has driven an RCF already, thus able to give an analysis?

Would be interested to know how many ISF-ers are making a jump to the RCF.

Meraki Autoworks

iTrader: (8)

don't think many will, not big enough of an upgrade.

RNISF

iTrader: (1)

I won't. I wanted 4 doors for more *****s lol. Plus the isf looks better.

vbb

iTrader: (3)

I also want/need 4 doors but the RCF still had me thinking of a switch.... before the final numbers came out. I'd rather buy a gently used 2014 ISF as an upgrade to my 2009 than a 2015 RCF. Four doors aside, the ISF is more bang for the buck considering what would likely be a $15K difference or more in the price from used ISF to new RCF.

I do concede that the RCF will likely lap faster than the ISF on most tracks, and is the superior road track car. But in real world driving, it probably doesn't feel any faster than my ISF, and that'd be tough to swallow.

rmillsISF

Are you also including the fact that your numbers on braking include an $8000 carbon ceramic braking package?

Also, I have to bring up I have the ISF for reliability reasons. I'm part of the BMW club in town and wouldn't even consider buying a V8 model and I'm not too keen on the turbo's as well.

LexISguy

I agree 4 doors is my selling point I will see what the GS-F has in store, and hoping a long shot a new IS-F...

StealthFF

I will this saturday coming up.. I will let you all know and im bringing my gopro!

ISF4life

iTrader: (30)

ISF for life! if i wanted 2 doors get a GTR on a side

I8ABMR

test drive with a GoPro might make them a little nervous.