94 ls400 hp
Pole Position
Joined: Aug 2010
Posts: 221
Likes: 0
From: IL
No really though, the supercharger is a dang good idea, seeing as the internals of the 1UZ-FE, from what I hear are SUPER strong. A turbocharger isn't a bad idea either. Both are hell pricey for a full set up.
What are you trying to do with the car? Because if you have any desire to make it a go-fast car. You can start ripping out all that weight.
What are you trying to do with the car? Because if you have any desire to make it a go-fast car. You can start ripping out all that weight.
Instructor
Joined: Sep 2011
Posts: 1,242
Likes: 24
From: IL
Lextreme.com has a bunch who have done a lot of mods to the non VVTi 1UZ-FE's. (and VVTi's, but more so non VVTi's)
The 98-00 LS400's lose around 10 hp and 10 lb-ft torque compared to the GS400, according to Lexus the only difference is in the exhaust. Likely the earlier LS's are similar in restriction to keep the noise down. The GS's are by no means loud, actually quite quiet....
The 98-00 LS400's lose around 10 hp and 10 lb-ft torque compared to the GS400, according to Lexus the only difference is in the exhaust. Likely the earlier LS's are similar in restriction to keep the noise down. The GS's are by no means loud, actually quite quiet....
Last edited by RamAirRckt; Jan 24, 2012 at 04:03 PM.
Driver School Candidate
Joined: Jul 2011
Posts: 29
Likes: 0
From: AZ
i 2nd the exhaust opinion
I looked under my 94 and wondered how many mufflers could one need. With three cats and 4 mufflers and the tiny, really tiny, exhaust piping maximum flow from intake through to tailpipe could not have been a consideration. I've never looked at the 1uzfe head , but I'll bet thereare restrictively small ports. Dump the mufflers , fab some headers, use higher flow cats, match port the heads to the intake and exhaust manifold and I bet ya could up the ponies by 3 to 5 % easily. If the ecm does its job properly, freeing up the exhaust shouldnt cause a lean fuel mixture so waddaya got to lose.
Oh , as prev responder indicated,
ripping out the 10 tons of extra creature comforts and shrouding and what not cannot hurt either.
Oh , as prev responder indicated,
ripping out the 10 tons of extra creature comforts and shrouding and what not cannot hurt either.
Instructor
Joined: Sep 2011
Posts: 1,242
Likes: 24
From: IL
Yes, the ECU will compensate for AFR to a point. It will add fuel when it sees it leaner and should map that and remember it.
Superchargers and Turbos are always awesome, but the lack of tuning of these engines other than a piggy back means the tune will never be spot on. Just not much market for people to go and dig up what is on them and figure it out. It takes a ton of work and time and then people want to not pay squat for it. So it never gets done.....
Wanna lose weight in the car? Think of 1600 places to lose an ounce.
Superchargers and Turbos are always awesome, but the lack of tuning of these engines other than a piggy back means the tune will never be spot on. Just not much market for people to go and dig up what is on them and figure it out. It takes a ton of work and time and then people want to not pay squat for it. So it never gets done.....
Wanna lose weight in the car? Think of 1600 places to lose an ounce.
I looked under my 94 and wondered how many mufflers could one need. With three cats and 4 mufflers and the tiny, really tiny, exhaust piping maximum flow from intake through to tailpipe could not have been a consideration. I've never looked at the 1uzfe head , but I'll bet thereare restrictively small ports. Dump the mufflers , fab some headers, use higher flow cats, match port the heads to the intake and exhaust manifold and I bet ya could up the ponies by 3 to 5 % easily. If the ecm does its job properly, freeing up the exhaust shouldnt cause a lean fuel mixture so waddaya got to lose.
Oh , as prev responder indicated,ripping out the 10 tons of extra creature comforts and shrouding and what not cannot hurt either.
Oh , as prev responder indicated,
ripping out the 10 tons of extra creature comforts and shrouding and what not cannot hurt either.Trending Topics
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Top 10 Most Confusing Things Lexus Has Ever Done!
Joe Kucinski
2026 Lexus ES Review: Lexus Re-Embraces Founding Principles
Michael S. Palmer
10 Lexus Bargains That are Cheaper Than a New Toyota RAV4
Joe Kucinski
8 Weirdest Things Lexus Has Ever Built
Verdad Gallardo
10 Lexus Designs That Have Aged Like Fine Wine
Verdad Gallardo
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Racer
Joined: Mar 2004
Posts: 1,402
Likes: 117
From: Colorado
The list of heavy performance mods diminish for the 95+ models from what i understand, because they switched to much lighter connecting rods for more efficiency. Which are fine for the stock motor, but not so much for forced induction.
Same reason Toyota stopped selling the TRD supercharger for the 2UZFE engines. They were nuking connecting rods quite often
Same reason Toyota stopped selling the TRD supercharger for the 2UZFE engines. They were nuking connecting rods quite often
Thread
Thread Starter
Forum
Replies
Last Post
marklfarkl
LS - 1st and 2nd Gen (1990-2000)
15
Nov 7, 2019 09:37 AM
