Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300 > Performance & Maintenance
Sign in using an external account
Register Forgot Password?

Sc400 intake measurements please

Thread Tools Search this Thread Display Modes
Old 07-12-14, 05:51 PM   #1
Pole Position
Trader Score: (0)
Dream36's Avatar
Join Date: Dec 2012
Location: Delaware
Posts: 379
Default Sc400 intake measurements please

Hello all, I'm not really a thread starter so I'll make it brief.
Last winter I pulled my intake piping off to get to the power steering pump. When I pulled it out the accordion hose crumbled in my hands. So as a temporary fix I took a random piece of my last build (ls1 rx7). It was a scrap coupling no idea on the size. It fit well in the maf bracket but was quite a bit big on the plastic pipe. As part of the word temporary I used RTV and a strip if rubber to clamp it down (with duct tape as a hold till it dried).
Now unfortunately the recent hot weather has caused the mess of rubber and silicone to slip and leak. This is causing major hesitation and fuel ratio issues to my daily driver. I'm still required to drive it to work 6 days a week and won't have $$$ to throw at it till Tuesday (and time the following Sunday)

Now my questions
What is the actual diameter for the intake manifold? MAF?

That's it, I think they are 3" but wanted to be sure. I can't take his thingy off because it will make it worse. My plan is to get a 90* coupling stretching out to 4" with an aluminum 45* pipe and the reduce it back down at the MAF. The reason I want a 4" pipe is for volume. Yes I know it will create turbulence but volume is more important to a daily driver than peak.

Feel free to debate my reasoning, I assure you I've searched but couldn't find the diameters I need so I can order the parts.

Thanks ahead if time,
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
Dream36 is offline   Reply With Quote
Old 07-12-14, 11:12 PM   #2
Lexus Test Driver
Trader Score: (3)
t2d2's Avatar
Join Date: Apr 2014
Location: Oregon
Posts: 900

I don't have the measurements in front of me, but you can find the replacement part for $13 on eBay. I need to order one soon to replace my dried out mess... I bet you could make due for a couple days by just wrapping strips of duct tape between and around the two open ends of the intake.
'94 SC400 Factory Frankenstein: '00 RX300 steering wheel, '93-96 GS300 speedo/tach needles, '98-02 GS4xx wheels, Prius lug nuts (eco friendly!) ... LS400 calipers denied wheel clearance for take-off.
Performance: Alternative BFI (BeeFI?), A/T Solenoid Bypass, M2/Manzo axleback exhaust (awaiting mid-pipe resonator delete), 2-Tone Driver's Seat ("performance" as measured by the butt test).
t2d2 is online now   Reply With Quote
Old 07-14-14, 10:35 AM   #3
Pole Position
Trader Score: (0)
Dream36's Avatar
Join Date: Dec 2012
Location: Delaware
Posts: 379

Still need to know please. It's payday when I get off work 2am. If there was a local shop that sold couplings it'd be a nonissue but I gotta order online :/
Dream36 is offline   Reply With Quote
Old 07-14-14, 10:35 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Made my own True Cold Air Intake darkstar38 Performance 56 08-04-14 07:33 AM
MAF Sensor and Throttle Body Cleaning DIY: GS400 & GS430 SeattleGS400 GS - Second Generation 78 07-29-14 01:32 PM
P0171 finally fixed?!?! fasted1953 GS - Second Generation 23 12-17-13 06:14 AM
SC300 MAF's BrutalSC Performance & Maintenance 8 12-17-12 01:19 PM
Intake pipes kponti Performance & Maintenance 2 08-09-12 09:35 AM

All times are GMT -7. The time now is 11:38 AM.

Join ClubLexus

Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS

Get all contact info