Performance Upgrades!!
Thread Starter
Lead Lap
Joined: Apr 2005
Posts: 491
Likes: 0
From: CA
Performance Upgrades!!
Hey guys,
I have a 98 gs400. As far as performance, I only installed exhaust. Wondering what else is out there for my car that is a great upgrade for performance. Ive been looking into some intakes that include a reprogramed ecu. But other than that I don;t see anythign else. Any suggestions? If you can also give me the brand name and what type of product woudl be really helpful. Or maybe some where I can get it.
Thanks
-Kenji
I have a 98 gs400. As far as performance, I only installed exhaust. Wondering what else is out there for my car that is a great upgrade for performance. Ive been looking into some intakes that include a reprogramed ecu. But other than that I don;t see anythign else. Any suggestions? If you can also give me the brand name and what type of product woudl be really helpful. Or maybe some where I can get it.
Thanks
-Kenji
Lexus Fanatic
Joined: Dec 2003
Posts: 14,523
Likes: 3
From: new jersey
wlcome to CL Kenji
ok off the top of my head
performance products
Air intake ...SRT intake
spark plugs ...TM sparkplugs
torque converter with 2800 stall ..prescion industries
supra rear with LSD and 3.76 gears ..toyota ..look on supraforums
supercharger or Turbo install ..RMM or some custom shop's design
soon there will be headers ..contact member J brady
good luck and ...
ok off the top of my head
performance products
Air intake ...SRT intake
spark plugs ...TM sparkplugs
torque converter with 2800 stall ..prescion industries
supra rear with LSD and 3.76 gears ..toyota ..look on supraforums
supercharger or Turbo install ..RMM or some custom shop's design
soon there will be headers ..contact member J brady
good luck and ...
Joined: Feb 2001
Posts: 31,944
Likes: 2,737
From: North Carolina
TLW has most of the options laid out. Since you're in CA I'd start with the Torque Converter (TC)or the 3.76 diff. The SRT intake and ECU is not CARB legal, but I believe the K&N intake is (but doesn't have the ECU portion / less gains)
Pole Position
Joined: Oct 2004
Posts: 376
Likes: 0
From: Washington
Originally Posted by T.L.W.
wlcome to CL Kenji
ok off the top of my head
performance products
Air intake ...SRT intake
spark plugs ...TM sparkplugs
torque converter with 2800 stall ..prescion industries
supra rear with LSD and 3.76 gears ..toyota ..look on supraforums
supercharger or Turbo install ..RMM or some custom shop's design
soon there will be headers ..contact member J brady
good luck and ...
ok off the top of my head
performance products
Air intake ...SRT intake
spark plugs ...TM sparkplugs
torque converter with 2800 stall ..prescion industries
supra rear with LSD and 3.76 gears ..toyota ..look on supraforums
supercharger or Turbo install ..RMM or some custom shop's design
soon there will be headers ..contact member J brady
good luck and ...
What do you do about the speedometer when changing to the 3.76 Supra rear?
On another note, let's say you lived in an area where there is no emission testing. What would be the issues in removing EVERYTHING from the exhaust manifolds back and putting a true dual exhaust system on the car. (Retaining the oxygen sensors, of course) A few guys did this with their SHO's, but the exhaust sound was horrible. Just wondering.
EV ftw!!!
Joined: Nov 2002
Posts: 9,032
Likes: 601
From: Lake Ontario
Originally Posted by Billh2
What do you do about the speedometer when changing to the 3.76 Supra rear?
Originally Posted by Billh2
On another note, let's say you lived in an area where there is no emission testing. What would be the issues in removing EVERYTHING from the exhaust manifolds back and putting a true dual exhaust system on the car. (Retaining the oxygen sensors, of course) A few guys did this with their SHO's, but the exhaust sound was horrible. Just wondering.
I plan to do something else and that is replacing the pipes after the cats (keeping the cats so that I can pass smog and emmissions tests) and replacing the Y-pipe with two X pipes. Will post results in a couple of weeks. From my research, the sound will be simply amazing!!!
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Pole Position
Joined: Oct 2004
Posts: 376
Likes: 0
From: Washington
Originally Posted by Hameed
Nothing. As far as I know it does not affect the speedometer - just the rpms.
Hard to figure that out. The speedometer is driven by the transmission. ?? (Not arguing, just trying to figure that out)
I am pretty sure the same effect will be noticed on a GS if you do this. Horrible sound.
I plan to do something else and that is replacing the pipes after the cats (keeping the cats so that I can pass smog and emmissions tests) and replacing the Y-pipe with two X pipes. Will post results in a couple of weeks. From my research, the sound will be simply amazing!!!
Hard to figure that out. The speedometer is driven by the transmission. ?? (Not arguing, just trying to figure that out)
I am pretty sure the same effect will be noticed on a GS if you do this. Horrible sound.
I plan to do something else and that is replacing the pipes after the cats (keeping the cats so that I can pass smog and emmissions tests) and replacing the Y-pipe with two X pipes. Will post results in a couple of weeks. From my research, the sound will be simply amazing!!!
Thread Starter
Lead Lap
Joined: Apr 2005
Posts: 491
Likes: 0
From: CA
Thanks
Thanks everyone for your replies, and thanks for welcoming me to the forum. I will eb looking into the torque converter. Also, for the srt intake, couldnt i just unplug the line in the Ecu for the srt intake to pass smoge still?
-Kenji
-Kenji
Lexus Fanatic
Joined: Dec 2003
Posts: 14,523
Likes: 3
From: new jersey
Originally Posted by maximussp
Thanks everyone for your replies, and thanks for welcoming me to the forum. I will eb looking into the torque converter. Also, for the srt intake, couldnt i just unplug the line in the Ecu for the srt intake to pass smoge still?
-Kenji
-Kenji
but once you cut the wires and splice in the piggyback
you have to leave it like that until you put it back to stock
disconnect the box and you leave an open circuit to the MAF (mass air flow)sensor
and the car runs in safe mode
the downside to the TC is the $$$ brand new TC's will cost from $700-900 and then the install
not too mention the tranny cooler but thats only like $30-50
good luck and if you have any questions you cant find thru search PM me ill try to help ya
Driver School Candidate
Joined: Feb 2005
Posts: 22
Likes: 0
From: TX
Is there a way the speedo can be changed? If you change the gear ratio to the 3.76, then the speedo will be off unless you run a larger diameter wheel and tire combo. If you run a larger wheel, then the gain of going to a more aggresive gear will be offset due to the larger diameter of the wheels.
Originally Posted by cruiser99
Is there a way the speedo can be changed? If you change the gear ratio to the 3.76, then the speedo will be off unless you run a larger diameter wheel and tire combo. If you run a larger wheel, then the gain of going to a more aggresive gear will be offset due to the larger diameter of the wheels.
putting on 20s (or 19s fat) setup will throw the speedo off, that's what i haev right now. but it's ok, it's only couple of mph even when it says 80mph, not like it's 20mph off.
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