lobuxracer

iTrader: (2)

Dynos do read universally. They don't use the same measurement technology, they don't have the same controls for operating parameters, and no one can control the weather which has a very large impact on the ultimate power numbers you see. The only thing an aftermarket dyno does well is produce a number for a customer. Other than that, they're pretty much useless in predicting many things and utterly useless for comparisons between cars.

DrRick

although i dont have the dyno sheet...i can vouch for D in saying that he's not gonna lie about what his RC-F put out. why would he? he loved his IS-F and simply fell in love with the RC-F on a test drive. he has no biases...

btw...the RC-F also weighs about 2-300 lbs more than the IS-F. so thats why it only traps a couple mph higher.

I8ABMR

I love the way they look and to the RCF is more appealing than the GSF ( since the GSF is an RCF sedan ). I am excited to drive one in the future.

itsmike177

iTrader: (3)

Stock ISFs dynos at 330hp on 91 octane here in CA. Which is about right since I have ran against 360 dynoed GTO's and they are quicker.

So RCF should dyno at 370-380 on 91 octane worst case. Unless Toyota is overstating the 467hp.

MisterSkiz

iTrader: (2)

I dunno about that...My auto bolt on LS2 GTO dynoed at 360rwhp...the IS-F stock is faster than it...

MK4Sup_isF

iTrader: (10)

Didn't dyno my car at stock. 91 octane CA gas with headers + exhaust + 2 piece rotors made 408whp and 390tq on a Dynojet. 90 + F that day too. I highly doubted headers and exhaust and 2 pieces rotors increased 75whp. My car has 108k miles at the time of the dyno runs too. Gotta know what dyno reads 330whp for a stock F, can't compare a dyno page from the F and the GTO if they are not from the same car and same day.

Fsport2UR

Dynos I know vary drastically. Throwing in elevation and weather all the more.
I just would like to see sheets from a stock ISF and a stock RCF on the same dyno on the same day. To me that would be conclusive. Trap speeds I know tell a lot about the true power of a car, but there are also variations when you factor driver skill and tires. How well the track is prepped is also a factor, and I've been to some real ****ty tracks...so this can effect trap speeds. Put a guy who doesn't know much about launching an auto car and you will not only see bad times but bad trap speeds as well.

flowrider

iTrader: (9)

Though not my Graph, the attached shows the typical progression of an ISF from stock to IHE.

Lou

4TehNguyen

iTrader: (1)

ISFs do gain this much power from I/H/E, mainly from the headers. 350-360 rwhp stock is inline with typical ~17% drivetrain loss on a 416hp ISF

MK4Sup_isF

iTrader: (10)

Yeah I was talking about his number of 330 whp for stock ISF on 91 octane. Yeah I do think that there is about 50-60 max whp total to gain from headers and exhaust. Which my 408 whp is consistent with the roughly 50-60 whp gains from 350-360 baseline.

I8ABMR

loving this graph ! Very cool to see each mod quantified like this. VERY COOL !

1stLexF

So from this graph borla exhaust makes more hp gain than joe z exhaust, wow.....