four o two

iTrader: (1)

You know what I think? Who gives a flying rat's behind about 0-60 mph? Let me see some REAL dynographs from this "company", some REAL track times, and some REAL specs.

IS25Heaven

iTrader: (8)

yooo chill. All im saying this just adds to the list of how unreliable their information is. Thats all im trying to say

suicidesam

honestly ask yourself why would you waste your time trying to turbo or supercharge a 250??

breplica

I personally think 10 secs 0-60 sounds about right for that kind of altitude, temperature, and allowing for the fact that the spare tyre was probably in the trunk, probably had a full tank of gas, allowing for the fact the car tested was probably not in 100% brand new tip top condition, and probably had a fat driver.

When the japs give factory 0-60 times, they rip out every interior item except the gas pedal and steering wheel, chop off the roof, run the car on fuel vapours, use 110/30/12 tyres, and get some 25kg 9 year old boy to drive it, on a cold winter's day somewhere in Siberia. Then they take a second off that time due to 'unfavourable' test conditions. Well, not exactly, but you get the idea

I should also add, i've driven cars up to an altitude of almost 6000feet and i can assure you there is a VERY noticable amount of power loss.

Dodgy as the times may seem to anyone. All i want to know is: were the test conditions IDENTICAL on both runs for the supercharged vs non-supercharged version. As long as that it is....then any issue with test conditions becomes moot since the test conditions cancel out and two test results can be meaningfully compared. Of course, i have seen no reason to believe that the test conditions were identical at this point

swyner

Anymore updates? Does anyone have a list of vendors (US or International) that sell a supercharger for IS250? Has anyone been in one, seen one or have a video of one?

swyner

Don't all respond at once!!!! seriously, supercharging an IS250 is something a lot of people want to do because they are tuners at heart. I don't ever want to hear the "$3500 more would get you an IS350" because that is not true if you think about the value lost on selling your current 250. Anyway, that is besides the point because it's people that have 250's now that want to see what options we have to boost power. Anyone have some legitimate information on S/Cs for IS250s?

Kurtz

iTrader: (1)

Ok. Even if you doubled the cost difference to $7000 for swapping to a 350 you're still gaining more than double the power you would by supercharging a 250 and retaining full warranty.

If you want cheap power there's nitrous kits for sale right now.

A commerical supercharger kit for a 250 remains a nonsensical solution however. $6000-8000 bucks to maybe add 40 horsepower for the folks who were too cheap to spend $3500 to add 100 hp in the first place? Yeah, that'll sell well.

The same kit for the 350, the car people who wanted more power in the first place, sold like 3 units, to the point the folks who made the kit stopped making it.

Phiber

+1 .. if you wanted a fast car, should of thought twice before buying it. It is very difficult to tune the 2IS.

JoshIS408

iTrader: (11)

Lol Fu* This SC

"Please note that none of the RGM Supercharge conversions options eliminates the Air Conditioning."

Am i the only one who caught this? Leather seats in the is summer on the x50 make the car hot enough.

Gaugster

Yes, your are the only one that has caught this??? Read it again.

Is 'none' and 'eliminates' a double negative???

brtnrdr1x

iTrader: (3)

hahaha. nitrous go blast leave yoww *** in the past

Phiber

too expensive to refill and I don't want to blow my engine..

brtnrdr1x

iTrader: (3)

couldn't agree with u more..but if u had an is250 because u want a manual trans. n there is no TURBO/SUPERCHARGER that is worth the money u will tend to think about it haha..n u wouldn't need it broo, u got a 335 w/ JB3 u really have a sick setup with those 2 cars, ya don't really need nitrous, one's a twin turbo n one's a 3.5 6cylinder

lobuxracer

iTrader: (2)

So let's take all the factors into consideration - base dyno is done at 6000 ft altitude. That alone accounts for the pathetic stock dyno.

(11.8 psia - 14.7 psia)/14.7 *100% = -19.7%, so a "stock" dyno at 6000 ft loses nearly 20% of its peak power. IOW, a car that dynos 170 at sea level dynos 136 hp at 6000 ft. Their test car is doing well to produce 139.4 hp. It would dyno 173.6 HP at sea level.

What else do we know? We know we can add nearly 7 psig at sea level for a total of 21.7 psia. If they're tuning for 21.7 psia (which they should to optimize the power for 6000 ft), they're going to add 84% to their stock dyno, giving a theoretical 256 hp, which is identical to adding 7 psig to the their 173.6 hp engine at sea level (256 hp.)

Looking at their dyno chart, it's pretty obvious someone doesn't know how to run a calculator. Converting from kW to HP, we see 185 kW which my magic Microsoft converting calculator turns out to be 248 hp, not 370 hp (that number is clearly impossible without touching the internals). If they truly do have 95 R+M/2 gasoline, this isn't an unreasonable expectation at all. I doubt their "95" octane is any more knock resistant than our 93, and maybe even our 91.

The only real question left on the table is, can you actually put 7 psi to this engine in stock form?

So when you put actual numbers to the problem, their results are not unbelievable (except someone who converted from kW to HP and botched it completely.)

It's still not cost effective, and you know why I bought an IS-F instead of super/turbo charging my 350.

clemz

u guys are lucky that u have 3 IS to choose from - 250, 350, ISF.

In overseas markets, we have just the IS250 through the dealership.

And even if i were to Import a 350 into my country, the taxes, levies, custom duties etc would result in a mark up of more than S$40-$50k.

In S$ngapore, IS250 base is going for a sticker price of S$141,000.
(https://www.borneomotors.com.sg/lexus/LexusPriceIS.aspx)

Gray Import IS350 at S$180,000, Gray Import ISF at S$310,000.

Is it worth spending US$4k on an SC kit....u bet it is !
There is a huge market for an SC kit outside of the US.

I bet TOM's can easily do an SC kit for the IS250 *IF* they wanted to, all u need is show them the $$$

NB: USD/SGD approx 1.40