S4 Tii Turbo Upgrade - NoPistons -Mazda Rx7 & Rx8 Rotary Forum

2nd Generation Specific 1986-1992 Discussion

S4 Tii Turbo Upgrade


Old 03-29-2004, 04:59 PM
Junior Member
Thread Starter
Join Date: Feb 2004
Location: Hot Springs, Arkansas
Posts: 27

After getting my *** kicked by a near stock '86 GXL I have come to relize that my TII has problems. I have a cone filter w/mafs adapter, 3" exhaust, and a 3" downpipe. The car seems to be getting slower. It does'nt smoke bad and I cant find any exhaust leaks (even though it smells like there is one). I think the turbo is going bad on me and its time for a upgrade. Its an '87 TII. What all is involved? I have the following:

Cheap T-70 w/HKS flange

SS Exhaust manifold

Starion FMIC setup

Fuel Cut Defencer

Aftermarket Boost Gauge

What else do I need? A wastegate? What size? I only want to run about 10psi at the moment.
Massive Retard is offline  
Reply With Quote
Old 03-29-2004, 05:08 PM
Senior Member
Join Date: Nov 2001
Location: LA, USA
Posts: 1,622

You should work out your problems first with what you have. It could be a simple vacuum leak to the double throttle butterflies getting stuck or even stuffed cats. You should not be getting beat by a gxl, you should be leaving him in the dust.
turborotor is offline  
Reply With Quote
Old 03-29-2004, 05:10 PM
Senior Member
Join Date: Apr 2003
Location: College Station/Houston, TX
Posts: 138

You say it smells like an exhuast leak and the car is getting slower...check for leaks between the block and turbo manifold and between the manifold and the turbo. Blown gaskets here would create a leak and cause an increase in lag. Compression?

Your first priority is getting the car running 100 percent in stock condition. If you're turbo is bad search for a s5 turbo and manifold, they can be had for 200-250 dollars. What you're looking at doing is thousands of dollars. The starion core isn't that great, if you're doing a junkyard IC use a NPR core, or better yet a spearco core. With the turbo and manifold you'll need:

custom oil lines, possibly custom coolant lines, a good front mount with blow off valve, walbro or better fuel pump, bigger injectors, custom downpipe to fit the v-band on the new turbo, external wastegate, a good boost guage, money and time for tuning, standalone ems - wolf/e6k/lt8 etc....
baller520 is offline  
Reply With Quote
Old 03-30-2004, 01:06 AM
Senior Member
Join Date: Nov 2002
Location: Honolulu, Hawaii USA
Posts: 925

1) Fix your car

2) Learn how to drive better

RETed is offline  
Reply With Quote
Related Topics
Thread Starter
Last Post
Night Runner
RX-7 & RX-8 Parts For Sale & Wanted
01-10-2008 08:37 PM
2nd Generation Specific
11-23-2003 11:52 PM
Single Turbo Discussion
04-01-2003 03:13 AM
Crusty Rotor
Single Turbo Discussion
10-15-2002 04:16 PM
Single Turbo Discussion
08-26-2002 06:11 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Search this Thread
Quick Reply: S4 Tii Turbo Upgrade

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.