BNR34

iTrader: (1)

That is true, a blower is relatively cheap.

That is true too, you can increase the boost with a smaller pulley without tuning the ECU. But whenever I crank up the boost on my own cars, I like to tune the ECU to make sure everything works together, it is safer and everything works together better.

If the GS-F get a blower, the IS-F probably just stay NA the way it is, it just might get 10~20 more hp by unrestricting it on future models/versions. Just look at the AMGs, E55 had a blower before and now the E63 got twin turbos, the C55/C63 never had any boost.

KJH

More fuel through tuning is always the best route. I have two turbocharged cars of my own with comprehensive fuel and EMS upgrades. That said, many stage 1 pulley upgrades on OEM supercharged cars involve little to no ECU tuning because the slightly higher boost is within the ability of the ECU to accommodate. More serious pulley upgrades with larger injectors will require, IMO, appropriate ECU tuning.

If Toyota's OEM fuel system for a S/Ced GS-F is as generous as it was for the Supra turbo, for instance, with 550 cc injectors (considered huge in 1993) and the famous Supra turbo Denso fuel pump, the car will accommodate more boost and power than it is nominally rated for. The Supra was rated at 320 bhp and it is commonly known that the OEM fuel system, in good operating condition, will accommodate 500 whp. This is 83% more capacity than the system is rated by Toyota (assumes a bone stock 6MT Supra in excellent condition will make 300 whp).

It would not surprise me at all if Toyota's penchant for overengineering its high performance cars (especially with Lexus' reputation for durability and reliability) resulted in a car with a performance envelope much bigger than the factory ratings would lead one to believe.

Agree about an NA IS-F. That would be the way I would handle it, but it's not clear, to me at least, whether Lexus believes the more expensive F cars should be higher performing (setting aside the LFA). I think the GS-F should be a better performer than the IS-F, but I am not sure the GS 430 was a better performer than the IS 350; hence, my concern. Do you have any more insight into this topic?

LexIS007

iTrader: (1)

They won't put a LFA V-10 in the GS-F for one main reason.....the horrible gas mileage it would get. The V-10 in the LFA is like a Ferrari engine....its a small, lightweight, low displacement engine that revs to high heavens.....and gets about 13MPG. So yeah, V-10 not gonna happen!

Rash

iTrader: (1)

http://lexusenthusiast.com/2011/09/0...engine-rumors/

iggyhop9

I'm thinking the GS-F will come in at about 70k, maybe 75k. The IS-F boasts about a 21k premium over the IS350. This would be about a 23k premuim over the current GS350 and a 14k-19k premium over the last gen GS460. This is assuming they use the 5.0 from the IS-F and maybe strap on the Eaton supercharger they use on the 5.7 V8. IIRC, it costs about 4.5k

Vladi

Don't be surprised if 450h tips the 70K barrier with some options like F-Sport or Premiere package.

iggyhop9

I wouldn't be surprised. Current 450h starts at 59k. Nav & ML package and the F-Sport package could possibly break 70k.

rominl

iTrader: (4)

that kind of means you aren't really in that market at all. most buyers who can afford a 100k car like this, they don't worry as much on gas. e60 m5 and e63, they both get low teens (or even high single digit) for gas mileage. owners are driving them normally already, not even like a madman. 13mpg? i am sure those people would be so glad already

BNR34

iTrader: (1)

M56 maxed out at $72k today, I don't think a 2014~2015 GS-F will be the same price. Lexus in general have a good premium over a comparable Infiniti model.

iggyhop9

You can also max out a IS350 RWD for 61k. Doesn't mean you have too.

jtrue28

, not with 550hp.

"Power should be in the 550 range, which is well above the 414 hp the V8 now makes in the IS F. The two cars are expected to share the same eight-speed automatic transmission."

rominl

iTrader: (4)

if they make a gsf with 550hp and 75k? i give them a thumbup right there

BNR34

iTrader: (1)

No one needs to do anything, I was just using that max out # as a reference to speculate on the pricing of a GS-F.

RWD IS350 max out at $49k, unless you count all the F-Sport accessories or you meant the coupe.

oohpapi44

iTrader: (1)

I'd give a certified check...

iggyhop9

Yeah, I was counting the F-Sport accessories on the regular 350. And not necessarily 550hp, 500 would be fine if weight was kept moderately decent.