newbie after advice and knowledge on 350 tuning
03-13-09, 02:08 PM
#1
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newbie after advice and knowledge on 350 tuning
I want to know everything 
what can you get on these? are there many charger kits etc? what do you lot uses for ecu mapping? etc etc
I am all ears
educate me
what can you get on these? are there many charger kits etc? what do you lot uses for ecu mapping? etc etc
I am all ears
educate me
03-13-09, 02:34 PM
#2
In the US at least there are 0 supercharger or turbocharger kits available.
The car has an 11.8:1 compression ratio so you'd destroy the engine with anything much above 5-6 lbs of boost anyway.
LMS made one for a while (5 lbs for boost for a $6000 kit) but they stopped because nobody would pay that much for that little.
If you're lucky enough to have a JDM (japanese) IS350 then you can buy TOMs supercharger kit, that costs $10,000 and adds 5.8 lbs of boost on 100 octane fuel.
There is NO aftermarket engine management available whatsoever.
A company called MHP claims they can reprogram the stock ECU, but AFAIK they've yet to actually do it on an IS350, and their normal price to do the ECU/TCU on a 350 would be $2800, and they think they might can get 15 horsepower out of that.
Nobody makes headers for the car either.
You can buy an intake, which will give you 5 horsepower tops. Joe Z is your best bet there, it's $109, so a mere $22 per hp.
For exhausts you have a ton of choices, all of them running $100 per hp and up (axle-backs which add 7 hp, or full exhausts which add 10-12 depending on if you remove or replace the cats... with pricing starting around $700 for axle backs and around $1000-1200 for the fulls).
Lighter wheels and tires are always helpful on any vehicle, but usually not cheap.
That's about it.
Oh, you can do nitrous. Jeremy has safely run both a 55 and a 65 shot. Do it wrong and new engine though.
If you bought a car to mod for speed you bought the wrong car.
Sorry for the bad news.
03-14-09, 01:50 AM
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well to be honest Ihavent bought the car, just looking at what option are there should I do that.
I did a bit of searching and found a 400ps blitz charger one, I guess that doesnt have standard internals.
Thanks for taking the time to post kurtz, shame there isnt more out there for it. but it does have a high compression ratio i guess.
Dam.
it you cant add much boost i guess the gains would be minimal? and figures on the LMS? surely they didnt use stock ecu?
I did a bit of searching and found a 400ps blitz charger one, I guess that doesnt have standard internals.
Thanks for taking the time to post kurtz, shame there isnt more out there for it. but it does have a high compression ratio i guess.
Dam.
it you cant add much boost i guess the gains would be minimal? and figures on the LMS? surely they didnt use stock ecu?
03-14-09, 12:17 PM
#6
well to be honest Ihavent bought the car, just looking at what option are there should I do that.
I did a bit of searching and found a 400ps blitz charger one, I guess that doesnt have standard internals.
Thanks for taking the time to post kurtz, shame there isnt more out there for it. but it does have a high compression ratio i guess.
Dam.
it you cant add much boost i guess the gains would be minimal? and figures on the LMS? surely they didnt use stock ecu?
I did a bit of searching and found a 400ps blitz charger one, I guess that doesnt have standard internals.
Thanks for taking the time to post kurtz, shame there isnt more out there for it. but it does have a high compression ratio i guess.
Dam.
it you cant add much boost i guess the gains would be minimal? and figures on the LMS? surely they didnt use stock ecu?
Even the TOMs supercharger, which reflashed the japanese ECU, doesn't change a whole lot, since it only ups the boost to 5.8 lbs...
With ~12:8 CR you simply can't run much more than 5-6 lbs so there's little need or gain from changing the ECU really, or even add more fuel.
Now if you took the motor apart, had someone design custom low compression pistons, and various other things, you could probably run more than that... but you've still got a thin-sleeved aluminum block to work with... and you're going to spend more $ than it would've cost to just buy an IS-F with a full warranty.
The fact there's so little to gain from bolt-ons like intake and exhaust is, I think, a testament to how well Lexus engineered the car from the factory.
My last car was modded, massively... over 500 hp naturally aspirated... loud as hell, uselessly fast, terrible mileage.
The IS350 is still more than sufficiently quick, handles great (esp. with the F-sport sways) and has the nicest interior in its class IMHO... plus excellent mileage, fantastic resale, and unbeatable Lexus reliability... and I can hear passengers speak while driving too. It's a wonderful car and I don't regret for a second I own it... but as I say if you're specifically looking for something to drop a lot of performance mods into, it's not the right car for you.
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03-16-09, 07:15 AM
#8
The IS350 is truly a fast car already. I've driven one at the dealership and was very impressed. It felt faster than an ES350 even. I can understand people trying to mod the hell out of an IS250 because you can feel a "significant" difference in speed, but if you are still considering getting the Lexus IS, I recommend the upgrade to the IS-F or just leave it at the IS350 model if cost is an issue. The IS250 was designed for cost and maximizing fuel efficiency for people that are "gas" conscious like me, but don't mind the mild performance from it.
Last edited by LexusIS-TL; 03-16-09 at 07:21 AM.
03-18-09, 12:08 PM
#10
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|2008 IS350|Obsidian Black w/ Black Interior|Premium Package|Full GFX Kit|F-Sport Intake|Tint 35% Front 20% Back|OEM iPod Integration Kit|http://www.cardomain.com/ride/3163612|
if you willing to spend that MOD $$$ on a 350
