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 ProjectB10 - 1993 Eunos Presso HI-XS Special Edition 
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Another or on going attempt at diagnosing the problem to assist a solution.

I disconnected the QuadSpark from Pin #s 2,3 and 4.

Changed the Ignition Options in TunerStudio and burnt the setting to Spark "going low, (normal)"

Checked the voltage at the 3 pins. Results as follows;

Pin #2 Coil A yellow wire 4.9V
Pin #3 Coil B Brown wire 4.9V
Pin #4 Coil C Green wire 11.9V

Something weird going on at pin #4? I understood the range at the pin was 0V to 5V?

OK a 100ohm 1/4 watt resistor across R62 will fix the over voltage problem to pin #4.

Couldn't find one in the grab bag of bits I have and could only find a 100ohm 1/2 watt resistor at Jaycar. Went ahead and bought some. Will pull the MSpnp2 out again and get the PCB out and try soldering in a resistor across R62, tomorrow.

PNP? wonder what that means?

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


January 06 2016, 3:24 AM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
All done. Perfect.

Instant start, good idle running on all six . Will button it up after I finish my coffee.

Lesson learnt. The Coil Pack option as documented in the DIYAutotune instructions is incomplete.

Pin #4 on the 15pin D=sub options port (once jumpered") as per instructions is on a 12V feed for some reason (on my V1.2 (Red) Board).

Must add the resistor as documented earlier in Worklog. Apparently the switching transistors in the QuadSpark "do nothing" when they see more than the required Max of 5V. Fix that and I have 3 working coils.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


January 06 2016, 6:56 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Just mucking around. I picked up a lot of Mazda KL-ZE chromed fasteners and a few fittings for next to nothing.

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Also I woke up to the need for some alignment spacers for the rear bushing if I am going to use the Mazda Lantis trailing links.

The Eunos Presso trailing link rear bushing is 65mm wide while the Lantis bushing is only 50mm wide. They simply bolt up if you use the short Lantis bolt (45mm). However the alignment front to rear of the link is then pulled "off" to one side. Probably no big deal but I thought I would get fussy on this one.

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So I will get some (4) 15mm length spacers parted off on the lathe from some spare bushing material I have. The spacers will be used to pack the Lantis trailing links out from the mounting. I also will use the other two apacers to "fix" the Lantis trailing links I fitted to the red Presso.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


February 08 2016, 4:43 AM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
So I have spent some time trying to identify if someone somewhere has identified an issue with the maintaining the OEM trailing link alignment when swapping out the OEM links or swapping in new bushings.

The OEM bush is 65mm edge to edge. All replacement bushings that I can find are 50mm edge to edge. That means that the rear link is pulled 15mm out of alignment when new bushes/different rear links are used.

No big deal? I am just not sure. The bottom only rear link locates the spindle which is laterally located using the Mazda TTL system. I didnt want to disturb the TTL alignment.

So I went ahead with making up a bushing (30mm OD x 20mm ID x 13mm L) to preserve the original trailing link alignment.

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I will use a 37mm OD x 20mm ID x 2mm stainless washer in 306 to provide a face to separate the bush from the bushing.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


Last edited by projectB10 on March 22 2016, 4:12 AM, edited 1 time in total.



February 13 2016, 5:03 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
I thought about using the OEM link arm and fitting up the bushes from the wytbishop Group Buy from many moons ago.

I hadn't even opened the packet before! The attraction was the 80 Duro compound. A little bit harder than the 70 Duro rating for the SuperPro stuff.

It was a no go. I am not sure what happened here but the diameter of rear wytbishop bushing was just too big. I have to figure out what happened there.

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Front bushing looks all AOK. Some Whiteline bushings for comparison.

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The rear bushing is a monster!

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


February 13 2016, 8:01 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
All Change!

Have changed over to some old school SSR Watanabe RS-8 (2 x piece) wheels in place of the Mazdaspeeds.

Staggered size set; Front 16x7 +38 and Rear 16x8 +40. I dismantled the wheels and refreshed the powdercoat (they were black) and the barrel lip was cleanedup and refinished to remove a small amount of kerb rash.

The fronts are mounted with a 15mm spacer to produce a net offset of +23. Fitted with 215 section Kumho's.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


Last edited by projectB10 on March 22 2016, 4:07 AM, edited 3 times in total.



March 20 2016, 8:27 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


March 20 2016, 8:30 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Love the dedication to your beast! Do you have the super pro part numbers for all the bushings you used? How do you rate the ride quality improvement after doing all of those bushings?

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June 10 2016, 10:26 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
RX8SE3P wrote:
Love the dedication to your beast! Do you have the super pro part numbers for all the bushings you used? How do you rate the ride quality improvement after doing all of those bushings?


Thank you RX8. I confess I have a Presso "problem". I will persist until I have cleaned out (fitted) all the bits and pieces I have gathered up over the years. I am having a transaxle built up with a MS LSD, a reinforcement plate, all new bearings and synchros and longer 5th gear. Will bolt that up with the built up motor and drop it in the red car and call it quits I think. Just track day it from there.

I am cheating a bit at the minute though as have been am selling off stuff that i know I will never actually use, on TradeMe.

As for the bushings, it started with this guy who was registered as Zydawn on forums.teameunos.com and other sites. He set up a SuperPro bulkbuy about 10 years ago. Take a look here.

http://forums.teameunos.com/viewtopic.php?p=40262#40262

In my opinion the ride quality is as good or better than the OEM. Nice and tight and very predictable in terms of placing the car in the right place in a corner or a lane.

But that is all based on the before and after assessment in driving the car. I just remind myself that I am swapping out almost 20 year old OEM bushings for aftermarket stuff (SuperPro) which is rated in either the same or sometimes harder durometer hardness rating.

It is hard these days to get the harder durometer bushings which were offered for some of the fitments. The small range of stuff (almost all SuperPro) that is still available is marketed as an OEM replacement which means ....soft!.

The Whiteline bushings are very hard (impossible) to come by now.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


June 11 2016, 1:36 AM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Haha I do have that thread by zydawn open in another window just realised you actually posted in it too :oops:

I saw that he used SPF 2417K but you also had SPF 2415K. Is the 2415 just a standard option and the 2417 that double offset thing? Not sure I need double offset.

Btw very jealous of your garage space. I'm looking to move house soon and get something with decent room for my cars! Then I can develop a similar collection problem :welder:

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June 11 2016, 8:20 AM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
RX8SE3P wrote:
...............I saw that he used SPF 2417K but you also had SPF 2415K. Is the 2415 just a standard option and the 2417 that double offset thing? Not sure I need double offset. ......:

Yes missed that point in my post. Its an absolute no brainer to my mind. The SPF2417K is the way to go if a DIY "control arm" rebushing is on your mind. I changed my direction on which bushing part to use very late in the piece.

The SPF2417K bushing set is still very available and can be purchased easily on line. That little bit of added caster improves the turn in and front end stability in a very noticeable way.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


June 11 2016, 6:36 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Cool, so there's nothing tricky or any negatives about using the 2417 over the 2415?

Btw, would love to see some vids of your car running!

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June 11 2016, 9:27 PM
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Post Whiteline KLC144 Sway Bar adjustable link kit
Installed a Whiteline Sway Bar adjustable link kit. Probably not good value for money on reflection!

The kit is pricey!!!

Very straight forward to install. No corrosion on any of the inplace OEM fasteners. I have been in here recently of course.

The kit compliments the Whiteline Sway Bar I fitted just a little while ago. I didnt use the Whiteline 17mm and 14mm fasteners from the kit. I prefered the OEM 17mm Nylock style nuts from the OEM links.

The adjustability factor could be useful down the road a bit once this thing is finished. :?: :|

In the mean time i can be very sure there is no unintended side to side preload of the bar as a result of mistmatch of the aftermarket sway bar and OEM links. I really knew that any way, as there was no forcing at all required when I installed the Whiteline bar with the OEM end links.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


October 14 2016, 11:43 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
Looks are good, what does it do?

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October 16 2016, 2:54 PM
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Post Re: ProjectB10 - 1993 Eunos Presso HI-XS Special Edition
The adjustable end links allow what is known as " corner" balancing. It's difficult to set up corner balance correctly without adjustable sway bar end links.

Very roughly, to corner balance a car, any "pre-load" effect from the sway bars has to be released or removed to get a correct "corner weight" reading on a set of scales. However usually when the sway bars are reattached you will find that the recorded weights for each corner will have changed.

Adjustable sway bar end links can then be used to adjust the bar. so as to achieve or restore the corner weight that was achieved with the bars disconnected.

The goal is to achieve corner weights that are the same with and without the sway bars connected. That is a situation where the sway bar is applying a zero value pre-load. Obviously they also provide the means to set up a track car by shifting weight around the corners of your car through applying an intended pre-load (to move weight from the right side to the left side, or from the right front corner to the rear left corner and so on).

A bit of overkill with my current strut/spring combo. My intention (given a little more time) is to set this particular car up on a full set of coilover/adjustable height struts.

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Eunos Presso HI-XS Special Edition, KLZE, KL47 IM+TB, MX6 LSD box OEM front s/bar, Outlaw IM+TB thermalbloks, lightened K801 fly, XTD Stage 3 clutch & cover balanced to f/wheel, mbolin tranny saver , walbro 255,short shifter, SRD shifter bushings- H&R Springs and Koni inserts, MSpeed engine mounts, SS brake and clutch lines, PRM CAI,Whiteline rear strut and swaybar, 7x17 Konig/Maxxim Fourteen rims, and stuff.


October 16 2016, 8:36 PM
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