Notices
SC - 1st Gen (1992-2000)

HELP! Overheating when in boost!

Thread Tools
 
Search this Thread
 
Old Jun 17, 2015 | 03:29 PM
  #16  
Studiogeek's Avatar
Studiogeek
Lexus Champion
iTrader: (6)
 
Joined: Nov 2012
Posts: 2,702
Likes: 21
From: NYC
Question

Originally Posted by ihiryu
When I supercharged my SC400, I had a massive overheating problem.

I had a Koyo Supra Radiator, Water wetter, with distilled water, Ford Taurus electric fan (man that thing was a beast), and it still overheated, especially on the highway.

It ended up being my lower splash shield/under guard thing.

Put that back on, and it was good to go.
Please tell us more about the splash shield and overheating. i have not heard that one before.
Reply
Old Jun 18, 2015 | 08:50 AM
  #17  
ihiryu's Avatar
ihiryu
Racer
15 Year Member
iTrader: (7)
 
Joined: Oct 2007
Posts: 1,668
Likes: 2
From: tx
Default

The thing that goes under the bumper. So when you don't have the under tray, what happens is that air passes through the bumper, and takes the path of least resistance. Since the intercooler is in the way it'll go above and below it. Since you don't have the under tray, air will just go under the car, and not through the intercooler, radiator, condensor.

So it might be fine when you're stock, but once you add the intercooler, and the turbos, you lose air, and gain more heat.
Reply
Old Jun 18, 2015 | 02:46 PM
  #18  
Studiogeek's Avatar
Studiogeek
Lexus Champion
iTrader: (6)
 
Joined: Nov 2012
Posts: 2,702
Likes: 21
From: NYC
Thumbs up

Originally Posted by ihiryu
The thing that goes under the bumper. So when you don't have the under tray, what happens is that air passes through the bumper, and takes the path of least resistance. Since the intercooler is in the way it'll go above and below it. Since you don't have the under tray, air will just go under the car, and not through the intercooler, radiator, condensor.

So it might be fine when you're stock, but once you add the intercooler, and the turbos, you lose air, and gain more heat.
Wow! Awesome! Thanks!
Reply
Old Jun 20, 2015 | 08:02 AM
  #19  
czar07's Avatar
czar07
Lead Lap
 
Joined: Dec 2009
Posts: 550
Likes: 1
From: Western Australia
Default

Even with that undertray there is no guarantee that all air entering the bumper goes through the intercooler and into the radiator. This is because you remove the factory duct that channels air into the radiator when you put a FMIC in. Ideally the FMIC should be ducted to the front bumper and the aircon condensor to ensure no / minimal air leakage
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lanthern22
GS - 1st Gen (1993-1997)
5
Jan 6, 2010 08:31 AM
xxtoobsxx
SC - 1st Gen (1992-2000)
5
Apr 17, 2008 08:26 AM
pitchblaq
GS - 1st Gen (1993-1997)
6
Jul 27, 2007 02:51 PM
Yg_green1
GS - 1st Gen (1993-1997)
4
Apr 5, 2007 09:44 AM
esandes
Maintenance
14
Jun 26, 2006 11:12 PM




All times are GMT -7. The time now is 07:39 AM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE