newis350

blitz gave up on a s/c, although they did showcase an is350 with a s/c at an auto show about a year ago. I am really interested to hear info about the TOM's s/c. There was a thread about someone who was installing the s/c, but there have been no updates for a while.

Has anyone heard from the guy that is doing the TOM's S/c?

carchitect

iTrader: (1)

The stock ecu in the Supra is really stupid compared to newer ecus. So installing VPC, SAFC, E-manage or even the F-con V are doable. Piggy back systems don't go well in the IS2. There might be hope is someone uses a e-manage ultimate to map the MAF meter output and A/F output and use the unit to provide additional fuel and timing control someone could very well boost an IS2.

Fabbing would be another concern. Fortunately there is room in the right side of the block but the exhaust for the left side will have to travel under the engine or behind it to get there. The downpipe would have to travel under the motor mount to exit. The largest turbocharger you could use would be a GT35R which to anyone here would be plenty but a GT30R would be ideal.

The A960E auto would be a different story. I'm not so sure how well it could holdup to the increased power.

Not to mention just like someone else had also. The high compression won't work well. You would need to reudce it and most everyone uses a thicker H/G to get there. Well this moves the heads further from each other and that won't work for the direct injection rails so you would have to use lower compression pistons and stronger rods so a built engine would be a necessity.

Do a little math and stuff adds up. I'd be willing to say the large bore and ports of the 2GR-FSE would net more power than a 2JZ-GTE at the same boost level if both are tuned well since the 2GR is much better at flowing. However, that won't come to a reality since no one here would spend the cash for such an expensive mod.

While the blower is a doable route remember that they generally are short lived units.

There are other fast cars out there that look good too aside from the MKIV Supra. 350Z, G35, R33 or R34 skyline (although these are not supposed to be here, parts are difficult to source, and the cost way too much, besides do you really want to shift with the wrong hand?) but they will be expensive to get into and will be much more than that to get that fast. Everyone would say how a supra makes 1000hp but there is a lot more truth to it and most supra owners are well aware of the truth. That kinda power looses practicality and most of us would rather have a well performing vehicle instead of bragging rights. I don't know how many supra owners I know have said how they prefer a 71mm bushing turbo over their new 74mm DDB turbo and thats considered a small turbo nowadays.

FASKINE

Supercharger would be the way to go. My friend owns FULL RACE out here in AZ and trying to stuff a turbo in there would be extremely difficult to do. Of course if you have an unlimited budget go for it!!!

nsxiboi

iTrader: (2)

BLITZ made a supercharger for the GS430. I would assume it would be possible for the IS250/350.

mattssi

I'm so frustratred with the lack of options - I guess I decided too quick to get the IS350 and couldn't pass up the deal. I should have gone with the 335i - with about a grand or so worth of upgrades, they are dynoing over 400 at the wheels.

1.8 years to go on my lease and it can't come soon enough. The lack of interest on swap-a-lease sucks too.

4TehNguyen

iTrader: (1)

11.8:1 compression ratio doesnt exactly work well with F/I

Kurtz

iTrader: (1)

And boy, for those 10 minutes at a time a BMW runs properly, it's a lot of fun!

4TehNguyen

iTrader: (1)

yea no one ever said 400 whp on a 335 engine will last long either, would love to see that last 50k miles

mattssi

My point is that there are options. IS350 = none. It is why I miss my IS300 so much also.

But, I need a convertible, so can't go back to that.

newis350

no dice. the GS430 uses a 4.3 liter engine.

dejacky

iTrader: (2)

don't let the 11.8:1 compression scare you from turbo charging. There are PLENTY of similar high-compression cars that have aftermarket turbo systems. I predict if you only boost 6-7psi with the IS350, you'll gain an extra ~100whp. You could use methanol injection to boost more without detonating, but I'm not sure how much boost stress these new engines can take. So, at the very minimum, boosting 6-7 psi with a proper intercooling setup is VERY do-able.

Kurtz

iTrader: (1)

IIRC the existing supercharger kit, boosting 5 lbs, only adds 40 rwhp. While a turbo avoids the parasitic loss of a supercharger it's not THAT much more efficient that it's likely to put down 150% more (40 vs 100) with 1-2 lbs more boost.

dejacky

iTrader: (2)

I gained ~100rwhp from simply boosting 7.2psi of boost on my lexus sc300's 10:1 compression stock 2jz-ge engine. With more displacement and higher compression of the IS350, you'll make more power per psi of boost. So, 100rwhp gain from simply adding a turbocharger system at 6-7psi is perfectly achievable. Also keep in mind larger turbos can make more power at the same boost level compared to smaller turbos.

HKS350

iTrader: (4)

This may be slightly true, But you'll never be able to run pump gas. Is350 compression is 11.8/1. another full point and you'll have to start blending fuels. you'd never get more than 5lbs out of this motor without blended fuel.
5lbs with a turbo = 50 or so HP S/C =35 HP or so...... LMS proves this point.