stratman

This will probably stir up a hornet's nest, but a few of the fellows who own the ISF with I/H/E say they have walked the C63 both standard and P31 from a dig and a roll. Now, I don't street race but I did drive my IS F hard at times and have done the same with my '13 C63/P31 though I've yet to stomp on the C63. Still, the IS F was a quick car but even with bolt ons I can't see it being faster than the C63. What say you?

t4orce

I stepped out of my 2009 ISF to a 2011 c63 p31 yesterday.

I have heard that headers transform an ISF but not sure if it would walk over a 63. I had intake and secondary cats removed in my ISF. It was quick but not as quick as my new car in stock form.

BiturboSF

It does seem that most I/H/E ISFs dyno around 400whp which is what Eurocharged claims there tuned C63 dynos & which is the same tune that I have on my car. I do know that recently SARD is about to release a first ever tune for the ISF & they claim a good HP increase.

dubzAMG

My buddy has a F with full bolt ons, i pull on him from a roll and dig. Stock p31.

dubzAMG

ISF with full bolt ons dynoed at 383 whp, 340 ft/lbs, stock p31 dynoed at 400 whp, 370 ft/lbs.

BiturboSF

I been on ClubLexus for a while so I've seen a lot of dyno graphs. They dyno around 400whp give or take some, 383whp is just slightly low for I/H/E not saying it didn't happen but there are a lot of variables

stratman

Thanks for the replies guys. So tforce, dubAMG, when you are saying stock are yours with the P31 package or standard (if one can call 451hp standard)? And, yes, I read about the SARD tune that is about ready for release. It should provide between 30 and 50 HP I believe if it comes to fruition (which is still not a done deal). The issue with headers and other bolt ons is that they are not legal and in California they will not pass the emission test which is one of the reasons I sold mine and purchased the C63 (only one reason). I had a hard enough time getting my 2002 Tundra with headers and cold air intake through because of missing CARB numbers though they are legal and are on the CARB list. Finally got it through by printing all of the documentation.

t4orce

Mine's a stock p31.

ruey220

Havent had a chance to run isf with the c63 but ive run several tuned and non tuned isfs with my b7 with a dinan tune and this I believe is slower than my c63. All I can say it can walk the isf no problem. Pulled one tuned from 90 to 150 on i5 he must have gave up somewhere along the way because he tried to prevent me from overtaking him and he was probably 10 cars back by the time I saw him. Isf is just a 4.7l engine in light car chassis i think that is same engine as my lx470 setup for a car

intence

isf is pretty quick. tune only c63 vs intake only isf

t4orce

No the ISF has a modified version of the engine in a GS limo. It's a full 5.0 V8 with a super quick torque convertor 8 speed gearbox. The engine is fettled by Yamaha and is a special and quick car. However, not as fast as a C63.

w204nyc

In a straight line, its as quick as an M3 but not the c63. I'm referring to stock. I ran a ISF tuned with full exhaust, not sure if he had headers and I pulled on him by a car. I had an OE tune only at the time!

ruey220

ok you are right. I somehow confused it with a different model. It made sense because the car seems like it has very little HP's compared to other peers in its class. You'd figure Toyota would try to outdo their Euro counterparts in a highly competitive sport compact line.

BiturboSF

Did you guys mean bolt on ISFs? Because there are no tunes out yet for the ISF (even though the cars been in production since 2008) except for the SARD tune that is about to be released very soon but is not officially out yet. The only HP mods you can do to that car is really only I/H/E which will still gain you a good amount of HP since the factory exhaust system is really restrictive. I wouldn't sleep on a ISF though, they are pretty quick cars.


Here is a ClubLexus member running a consecutive 11.9 in the 1/4 mile. His mods are I/H/E and sticky tires

Kriston

I don't see many ISF's around. I had a run in with a 2012 ISF though. Im pretty much stock with the exception of Intake / Exhaust on my 2010 C63 NON P31 package. From a dig the ISF kept up pretty good. But that can also be attributed to tire spin on my car. From a 60KM roll, it really wasn't any contest. The C63 puts down a good car length right off the bat and just keeps pulling after.

w204nyc

Tuned meaning modified. This is from the ISF owners mouth. Dont know anything about a ECU tune

isfftw

I don't know where you all are getting your info, but stock isf's dyno at 375+. Full boltons they dyno over 400+ easy. Also, I've never seen a c63 beat an isf. Look on youtube. Isf's walk c63's

solekeeper

1st post.


ban this troll.

isfftw

I've yet to see a c63 beat sn isf. I raced one 4 times a month ago and beat him by at least .3 every run. Are u guys at high altitude or something?

isfftw

I'm a troll because I said ISF is faster? Don't have hurt feelings that your c63 is slower. It's ok dude.

abcut973

You only joined this forum for that purpose. Or do you plan to switch over to a C63?

isfftw

Although I may be wrong about isf being able to beat a c63 stock, It bothers me when people give the wrong info. Isf does not dyno at 380 with fbo's. It dynos that stock almost. The post was about whether a bolted isf can beat a c63... the answer is yes. They both run similar times stock in the 1/4 mile, but bolted isf's run high 11's. C63's don't hit high 11's stock.

daemo

http://www.motortrend.com/roadtests/..._f_first_test/

didn't expect such a slow 0-400m time from isf

ab0bab0i

You are troll because you bumped a zombie thread from 2014 specifically to bait people.

PeterUbers

Troll lololol!!!