Looking for performance suggestions, seems like a rare thing to do.
09-19-13, 07:21 PM
#1
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Looking for performance suggestions, seems like a rare thing to do.
I understand the ls400 isn't a sports car but I'm looking for more power out of the V8. What are people doing to squeeze out some horsepower? Other then a cold air intake and exhaust...
Need to replace my ECU. Are there performance tuned ECUs out there for our cars?
Need to replace my ECU. Are there performance tuned ECUs out there for our cars?
09-19-13, 07:36 PM
#2
Moderator
I know a guy who's IQ is 170. He has once tried to analyze the ECU for a Celsior.
He was ended up just modding sensor signals.
You need to be smarter than him to get more power.
He was ended up just modding sensor signals.
You need to be smarter than him to get more power.
09-19-13, 07:46 PM
#3
For tuning you really have to use a piggyback setup or a complete standalone ecu.
They make cams for the 1uz, and you can do head work. You could always go boost on top of that stuff too! There are a lot of options really.
I hope you won the lotto though, it's a very expensive motor once you get into the internals.
09-19-13, 08:59 PM
#4
Lexus Champion
Everything else is snake-oil, but if you fix your failing ECU caps, it will give you additional low end torque that the car hasn't had in years, so that is the best way to go, unless you are rich!
it also will nearly always make all of your ECU issues go away, so the extra power is a bonus!
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09-22-13, 01:10 AM
#8
Lexus Champion
every Toyota vehicle I have ever installed aftermarket "performance headers" on, I have lived to later regret!
no aftermarket company seems to come close to Toyota fit and finish, and they always end up causing issues - and besides, your stock exhaust is nicely tuned from the factory, not a lot to be gained there anyway - everyone always jumps to rip out the Lexus exhaust parts, manifold, cat converters, etc., first thing, with no regard of just how finely engineered they are from the factory - just because some other cars have retarded exhaust designs that need to be trashed ASAP, don't assume your Lexus does, they did a helluva engineering job on our exhaust system, and that is the last thing on the car I would touch!
no aftermarket company seems to come close to Toyota fit and finish, and they always end up causing issues - and besides, your stock exhaust is nicely tuned from the factory, not a lot to be gained there anyway - everyone always jumps to rip out the Lexus exhaust parts, manifold, cat converters, etc., first thing, with no regard of just how finely engineered they are from the factory - just because some other cars have retarded exhaust designs that need to be trashed ASAP, don't assume your Lexus does, they did a helluva engineering job on our exhaust system, and that is the last thing on the car I would touch!
09-22-13, 03:54 AM
#9
uhh, PPE makes them for the 1uz, they have patterns for and have made them for '98-00 for sure.
the SC400 headers are rumored to work if you do a custom cat/y-pipe setup.
The factory exhaust is set up to be quiet and efficient and pass EPA/CARB regs for the era. Not performance. Between the FIVE (5) stock mufflers and resonators, crap merges, and log-style manifolds, there is power to be gained. The only part of the exhaust I am completely happy with would be the surprisingly high flowing and high quality metal substrate catalytic converters.
the SC400 headers are rumored to work if you do a custom cat/y-pipe setup.
The factory exhaust is set up to be quiet and efficient and pass EPA/CARB regs for the era. Not performance. Between the FIVE (5) stock mufflers and resonators, crap merges, and log-style manifolds, there is power to be gained. The only part of the exhaust I am completely happy with would be the surprisingly high flowing and high quality metal substrate catalytic converters.
09-22-13, 12:02 PM
#10
We've hit on this years ago. Since this is in discussions, JBrady's old thread:
https://www.clublexus.com/forums/ls4...tml#post482166
https://www.clublexus.com/forums/ls4...tml#post482166
09-22-13, 07:01 PM
#11
From what I gathered,
There is not a whole lot of performance parts for these cars, and the stuff they have is expensive.
Its a big 4 door luxury car. Most people dont want to race these cars, so why would they make the parts?
to make more power you need to feed it more air, and get the air out. as well as the fuel.
and Im not talking a cold air intake. if you think that is going to give you bigger numbers then just go to Autozone and go nuts.
you need Cams, port and polished heads, some sort of forced induction, free flowing exhuast, stand alone ECU, more fuel.
There is not a whole lot of performance parts for these cars, and the stuff they have is expensive.
Its a big 4 door luxury car. Most people dont want to race these cars, so why would they make the parts?
to make more power you need to feed it more air, and get the air out. as well as the fuel.
and Im not talking a cold air intake. if you think that is going to give you bigger numbers then just go to Autozone and go nuts.
you need Cams, port and polished heads, some sort of forced induction, free flowing exhuast, stand alone ECU, more fuel.
09-22-13, 07:09 PM
#12
Lexus Champion
if you want a smokin performance car to build, may I suggest a nice Chevy Camaro, Ford Mustang, etc. 
the LS400 is all about fit & finish, reliability, quietness, and luxury. - or to sum it up in one word, the Lexus LS is about style - it's not a performance car, and not a good candidate to make into one!
the LS400 is all about fit & finish, reliability, quietness, and luxury. - or to sum it up in one word, the Lexus LS is about style - it's not a performance car, and not a good candidate to make into one!
09-22-13, 11:38 PM
#13
if you want a smokin performance car to build, may I suggest a nice Chevy Camaro, Ford Mustang, etc.
the LS400 is all about fit & finish, reliability, quietness, and luxury. - or to sum it up in one word, the Lexus LS is about style - it's not a performance car, and not a good candidate to make into one!
the LS400 is all about fit & finish, reliability, quietness, and luxury. - or to sum it up in one word, the Lexus LS is about style - it's not a performance car, and not a good candidate to make into one!
09-25-13, 11:05 AM
#14
every Toyota vehicle I have ever installed aftermarket "performance headers" on, I have lived to later regret!
no aftermarket company seems to come close to Toyota fit and finish, and they always end up causing issues - and besides, your stock exhaust is nicely tuned from the factory, not a lot to be gained there anyway - everyone always jumps to rip out the Lexus exhaust parts, manifold, cat converters, etc., first thing, with no regard of just how finely engineered they are from the factory - just because some other cars have retarded exhaust designs that need to be trashed ASAP, don't assume your Lexus does, they did a helluva engineering job on our exhaust system, and that is the last thing on the car I would touch!
no aftermarket company seems to come close to Toyota fit and finish, and they always end up causing issues - and besides, your stock exhaust is nicely tuned from the factory, not a lot to be gained there anyway - everyone always jumps to rip out the Lexus exhaust parts, manifold, cat converters, etc., first thing, with no regard of just how finely engineered they are from the factory - just because some other cars have retarded exhaust designs that need to be trashed ASAP, don't assume your Lexus does, they did a helluva engineering job on our exhaust system, and that is the last thing on the car I would touch!
09-25-13, 05:13 PM
#15
Lexus Champion
