MXP's ST165

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Re: MXP's ST165

Postby zf_165_gt » Thu Jan 06, 2011 3:07 pm

Hi ,
sorry to barge in, but it is possible to use the stock distributor with a megasquirt.
the only thing that got me stuck was the igniter, I decided to use the ignition transistor of the megasquirt instead.
I did it on a 1st gen 3S-GE and a 3S-GTE running mostly the same wiring, except for boost control and resistor pack.

it needs tuning of the Crank sensor circuit, and in my case a zeal daughterboard to be able to feed the camshaft angle sensor.
I used an oscilloscope to tune it ,watching the input side of the circuit and the output ( waves, and square waves at the output),adjusting the Pots until desired behavior is found
In my case i am not yet finished adjusting the crank sensor circuit to my taste , but i believe it is possible.(engine runs but if the circuit is not tuned for cranking speed below 100rm , it is not catching the crans sensor signal, that is what i want to figure out)
I also made the gap of the VR quite little.

again sorry to have barged in the thread
have a nice day
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1988 ST165 , clean body, broken engine since acquisition.
1991 ST185 JDM , CT26/CT20 hybrid,
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Re: MXP's ST165

Postby MXP_57 » Sat Jan 08, 2011 7:32 am

No need to be sorry.

Yes i used the Zeil board. (available for cheap at DIYAUTOTUNE).

Both VR input are on the Zeil daughterboard.

I bypassed the circuit on the main board so i don't use the pots to adjust the signal.

I just played with the noise reducer feature in the software and i was logging the trigger signal while craking with the tunerstudio (full version) and adjust the noise reducer until i had a good signal. You don't need an oscilloscope, so don't panic lol.

I'm using the bosch BIP373 igniter (costs ~5usd). So i can adjust the dwell and sand higher amps to the coil.
CEIKA Demo car 1987 ST165 JDM 1000kg/700hp http://ceikaperformance.com
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Re: MXP's ST165

Postby zf_165_gt » Sat Jan 08, 2011 4:47 pm

nice work, for my part I use an MS1 on the v3.0 board, I never knew about that noise reduction feature lol:)
i am using the same board from DIYAUTOTUNE only for the cam angle sensor, tried to use both channel of the daughterboard but it did not worked for me.

Do you know if the ST185 Distributor would work with the same results like those from ST162 and ST165?
thanks

real nice car by the way
I own an ST162 and an st185 and i am really proud to see a 4th gen buit that way :notworthy:
1988 ST165 , clean body, broken engine since acquisition.
1991 ST185 JDM , CT26/CT20 hybrid,
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Re: MXP's ST165

Postby MXP_57 » Sun Jan 09, 2011 12:50 am

Yeah, thanks a lot!! I'll be even more proud of it once it will be running :D

Yeah there's no reasons why it shouldn't work with the st185 distributor.

You want to read the MEgasquirt FAQ, in the last 3 or 5 pages there are some really helpful posts. This is where i got all the infos.

Only the full version of tunerstudio has the oscilloscope kind of feature.
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Re: MXP's ST165

Postby MXP_57 » Sun Jan 09, 2011 12:50 am

Yeah, thanks a lot!! I'll be even more proud of it once it will be running :D

Yeah there's no reasons why it shouldn't work with the st185 distributor.

You want to read the MEgasquirt FAQ, in the last 3 or 5 pages there are some really helpful posts. This is where i got all the infos.

Only the full version of tunerstudio has the oscilloscope kind of feature.
CEIKA Demo car 1987 ST165 JDM 1000kg/700hp http://ceikaperformance.com
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Re: MXP's ST165

Postby MXP_57 » Mon Jan 24, 2011 1:03 am

Time for some updates:

The car started!! Last Friday.

I couldn't get the MS2 to read the VR (Ne and G1) signal even with the additional dual VR conditionner board.

So i went to the good old method, and ground two teeth 180 degrees apart of the Ne 24 teeth wheel. Telling the MS2 to read it as a 12-1 (1 missing wheel) at crank speed.

It worked straight away, even without using any software noise filtering.

It fired really good. I still need to work on the tune. Here is a video of the first start: Listen to it with headphones or good speakers. the sound is really deep :-D

VIDEO


I'm very happy with the result of the Varex muffler. Even fully open with the 1m short exhaust, the sound is no louder than the starter motor...


Here are a few pics:

Image

Image

Image

Image

I will start the tuning this week. I just have to finish the interior and do the wheel alignment.
:thumbup
CEIKA Demo car 1987 ST165 JDM 1000kg/700hp http://ceikaperformance.com
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Re: MXP's ST165

Postby MXP_57 » Mon Nov 26, 2012 1:27 pm

Hey guys,

I've updated the build list on the first post as well as the pictures and added a new video link too. :-)

I've been too busy with my brand CEIKA and also some parts like the roll cage bent tubes and fiberglass panels taking long to arrive. I will now start building the roll cage and full sandblast/respray. Then put it all back together.

It's gonna be sweet and really nuts. As a result it will be used as a demo car for CEIKA.

It will weight less than 1000kg and i will push it until over 600hp on e85. If i can reach 700hp with that engine, i'll see how it goes with my experiment of water injection without intercooler and e85. Then i will build another engine suited for that power on the side before this one blows (if it does! maybe not with the J&S). It will also help me find the right size turbo for this setup because there is no references anywhere. :P

Anybody running 275/35 tyres on st165?
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Re: MXP's ST165

Postby klue » Mon Nov 26, 2012 9:49 pm

275s youll need widebody for sure, keep us updated
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Re: MXP's ST165

Postby MXP_57 » Tue Nov 27, 2012 1:25 am

Yes, i have some fender flare +7cm. I will have to hack the fenders too. In the front it's the fiberglass ones i will have to be more careful in the rear.

But the whole extra width (extra 6cm compare to my actual tyres) is all going to go toward the outside. :D

Anybody experienced a 12cm wider track on our cars? It seems like a lot.
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Re: MXP's ST165

Postby klue » Tue Nov 27, 2012 10:24 pm

12cm is alot, consider the stress your putting on the suspension components from increasing the leverage on them.

When I wideded my rear 40mm(via 205 rear end) it softened up the rear quite a bit. I run the sway bar full stiff to compensate, but I will be using a stiffer spring next year.

I run + 40mm rear(no spacer) and + 30mm front (using spacers) 17x8 +35 offset, rear fenders are cut right out, fronts are rolled and stretched. with 235s i literally cant go any more without poking
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Re: MXP's ST165

Postby MXP_57 » Wed Nov 28, 2012 12:38 am

Thanks for the feedback.

I thought as well about the extra leverage put on the springs. It's amazing that you could actually feel it with 40mm spacers.

There is a formula to calculate the extra leverage and what spring rate you should put.

When i say 120mm wider track it's 60mm on each side. 120mm each side would have been quite a lot yes! :p It wouldn't fit in my garage anymore i think haha

i'm trying to find some wheels with ET0 or ET10 to avoid running spacers.
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Re: MXP's ST165

Postby klue » Mon Dec 03, 2012 2:25 am

MXP_57 wrote:Thanks for the feedback.

I thought as well about the extra leverage put on the springs. It's amazing that you could actually feel it with 40mm spacers.

There is a formula to calculate the extra leverage and what spring rate you should put.

When i say 120mm wider track it's 60mm on each side. 120mm each side would have been quite a lot yes! :p It wouldn't fit in my garage anymore i think haha

i'm trying to find some wheels with ET0 or ET10 to avoid running spacers.



OK you were scaring me with the 120mm haha

Actually on the rear I dont have a spacer, all the track width is from swapping a st205 rear end. I had to use spacers on the front to balance out the car as it was massively under steering after that. Now its a lot more neutral with the sway bar compensating for the weak springs. Definitely with more track width the car handles much better
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