GS400 Modifications

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May 2, 2001 | 12:40 AM

BBD

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From: Dubai, UAE

does anyone know where I can get a Full Exhuast System for the GS400 ,, with NO CAT what so ever I hate it when I think about 3 cats in my car..

another thing is their a Preformance chip for the car like ECU to get more fuel air mixture in the engine,,, and takes off the engine 149 Limited top speed. reasone for the ECU IF it is avilable I am trying to Cutome build my own Air Intake and I heard from some sources it wouldnt make much of a difference unless I reprograme the ECU

May 2, 2001 | 09:59 AM

fever

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From: Dallas

Forget about custom building your intake or finding a chip. Go to www.swiftacing.com. They are the only ones who offer a piggyback ECU with an intake=30 ponies and 40 pounds. Check out the Dyno.

May 2, 2001 | 11:33 AM

Mean Gene

Lexus Test Driver

Joined: Feb 2001

Posts: 1,199

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From: Alabama

SRT

Fever's right but one more thing - don't velieve the SRT piggyback ECU will eliminate the 149 mph top speed governor. That's another function of the tranny ECU from Swift, whenever Mo gets the bugs worked out!?

Also - the tri-convertor ( actually two pre-cats plus main convertor ) system of the Lexus is very hard to improve on & I think it will be improbable that U could run a total cat-free system anyway as the GS uses multiple oxygen sensors in the exhaust system to regulate the engine. I recall almost twisting off the wires on one of the pre-cats installing my T/C & remember what apperared to be O2 sensors both upstream & downstream of the pre-cats for comparitive data, I suppose. Try on of the muffler-only mods from Borla, L-Tuned, GReddy or some others. Might want to scan this forum for comments on the pros & cons of each system ( mostly loudness questions ) so it depends on what YOU want. Happy hunting!

May 7, 2001 | 12:35 AM

BBD

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From: Dubai, UAE

SO damn HARD to get a CHIP I Emailed about 4 companies today asked them if they could make a Preformance chip for the Lexus ,, but I dont think I will be getting posative response on it

,,, why is it hard to FIND on other than Swift racing..... I mean a REAL upgrade .. so I can fit an INtake and a N2O System and get on with my life hehe

May 7, 2001 | 07:35 AM

Mean Gene

Lexus Test Driver

Joined: Feb 2001

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From: Alabama

Tough to Hack!

B - Because the Lexus has computer codes that are a hacker's nightmare to crack!:eek: Rod Millen & SuperChips had been working on them for over a year & they both gave up. The only ECU is the Swift Intake ECU so there's half the battle won. I toldja in another post that nitrous is still possible but only in small quantities, IMO. Your call but keep us posted.

May 7, 2001 | 05:46 PM

BBD

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From: Dubai, UAE

Got 1 response from Hypertech today they basically told me u got the shaft on the ECU

waiting on some more replays

... (looks like I would give Mo a call after all) but a 950 intake is kinda pricey dont you think ?

May 7, 2001 | 06:41 PM

RacingAristo

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I've tried so many performance chip companys and there is only one thing in common in their replies, they don't have it nor either plan to make it. I guess if you are looking for ECU upgrade, you could only go with SRT at this stage. Or you could try APEXi SAFC and have them adjust the fuel map for yah according to your mod.