TWiR 1986 S3 TWR

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KiwiDave
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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Mon May 13, 2019 5:34 pm

spirit r wrote:
Mon May 13, 2019 5:10 pm
Thanks for sharing Dave. I try to get them from amazon!

Good work Thomas. I wish all upgrades were this easy.

There is a writeup on Ausrotary.

Also, see here http://rx7fb.com/viewtopic.php?f=22&t=3 ... ary#p34861
1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Tue May 14, 2019 11:05 pm

KiwiDave wrote:
Wed Jun 27, 2018 2:28 am
biznatch wrote:
Tue Jun 26, 2018 11:21 pm
Good number Dave. That's a bit more than I would have guessed, I was expecting it to come in around 140-150ish th:
Any intake mods yet?
I was expecting around 140 so it's a good result. Engine had good provenance though, having previously resided in the engine bay of a certain red RX2! Built using new plates, good housings and S3 rotating assembly.

Now if I was back home, I'd be getting someone to mod the nikki and massage the intake porting. Plan B will probably involve swapping the nikki out for something....... rdg
Intake mods coming soon .......

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1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

ian65
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Re: TWiR 1986 S3 TWR

Post by ian65 » Tue May 14, 2019 11:07 pm

unusual choke knob on a S3 Dave :?
1986 Series 3 13B Turbo II
http://rx7fb.com/viewtopic.php?f=2&t=2400
1992 Peugeot 205 1.9 GTI
1975 Honda SL125 Street Scrambler

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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Tue May 14, 2019 11:36 pm

Instantly recognisable though ;) The factory one is a tad too short for this particular application and my garage buddy threw shade upon my suggested work around and insisted on ordering a new cable fit for purpose. Not only is he a Ford fan but also an ex mini owner and I think he is actually enjoying working on something a little different. The OEM one never stayed out on its own anyway so I am quite pleased with his choice.

We were thirty seconds away from firing the things up this afternoon and I thought I should test the fuel system first. We've been thwarted by a leaky float bowl. We think it's a gasket but there's zero time now to get things delivered, installed and tested before the weekend. So the Nikki will be pressed into service again for Retro Rides Weekender at Goodwood.
1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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DKWW2000
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Re: TWiR 1986 S3 TWR

Post by DKWW2000 » Wed May 15, 2019 8:59 am

"Plan B will probably involve swapping the nikki out for something....... rdg"

Now that sounds very interesting...............can not wait to see :o
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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Re: TWiR 1986 S3 TWR

Post by Hobbawobba » Sat May 18, 2019 6:47 pm

Nice work bro! The simple things make such a difference aye haha. Chur!

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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Sat May 18, 2019 9:28 pm

I still have the OEM choke unit that I got off you. I'll keep that for use with the Nikki.
1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Sun Jun 23, 2019 10:00 pm

Intake mods progressing.....One step forward and three steps back is how it has panned out so far. On and off the car so many times. Almost had it ready for RRW at Goodwood and had to abort last minute due to a fuel leak. So I'm getting rather good at uninstalling and refitting the factory IM and Nikki. Hopefully for the last time. Fuel leak remedied. It's getting real close now .....

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1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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Re: TWiR 1986 S3 TWR

Post by KiwiDave » Mon Jul 08, 2019 1:31 am

There's nothing quite like a deadline to actually make things happen. My deadline was the realisation that the MOT was expiring in around 8 days and the car was still in no state to actually go anywhere. What to do?? Easy option was to stall the induction upgrade yet again, rip it all out (again) and put the nikki back on .... or solve a couple of issues.

The upgrade consists of a certain twin SU carb setup that Pete rescued, revived and installed on his car some time ago.

http://rx7fb.com/viewtopic.php?f=33&t=3974

I decided that it would be an interesting alternative to the traditional weber upgrade so a deal was done and a rather large box arrived and took up residence on a shelf. This was end of 2018 if I recall correctly. Then there were questions, a LOT of them, from myself to Pete, back and forth, for a long time. There were little experiments, some worked, most didn't.

Luckily, I share garage space with some clever guys and one is somewhat intrigued by our little rotary engine and was able to come up with some neat solutions. The last update ended with a fuel leak which turned out to be a float bowl o ring. So I got a couple of gasket kits and replaced the o rings in both bowls just to be sure.

Moment of truth ... 3 meters of fuel hose down to the carb on the garage floor. Light blue touch paper and stand back g-l

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Not a leak in sight :thumbup: So the SU's are installed for (hopefully) the final time.

Ta Dah

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One of the clever mods that my garage mate came up with was modding the OMP linkage. We couldn't use the factory solid link bar so he came up with an ingenious solution combining a motorcycle throttle component, a random Ford part for a mounting bracket and various fittings from a bicycle cable kit.

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Still working thru a few little snags and chasing a suspected vacuum leak but it's a worthwhile exercise. And the induction noise is very addictive sya

I'd probably done no more than 5 miles of testing before presenting TWiR for the annual MOT. I connected up fuel return lines so that they looked as if they were doing something and cobbled together the OMP lines out of some spare stuff that Pete supplied. Got the thing idling on the choke well enough and went thru the exam like a boss yay (and then found the idle speed adjusters later that afternoon. Yay for our cars not being subject to an emissions test).

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There's always something interesting lurking about at Mullan Speed Shop

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So that's MOT for another year. I do have to give a huge shout out to Pete (DKWW2000) for answering all my questions, sending photo's and even CAD drawings on a couple of occasions. For services above and beyond :thumbup: I got there in the end!
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1985 Sunrise Red S3 TWR
2003 Mercedes E320 CDI Estate AMG

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Re: TWiR 1986 S3 TWR

Post by DKWW2000 » Mon Jul 08, 2019 11:54 am

Great work Dave on fitment s(c) I am glad you like the sound.....I am all for a quite life :lol: Do you find them much smoother at low revs & through the rev range, I did not have any flat spots, only a bald one!!
When we meet next I will let you have some metal ploish yay yay
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ian65 (Mon Jul 08, 2019 9:39 pm) • KiwiDave (Tue Jul 09, 2019 2:08 am)
RX7 FB S3 - RX7 FC TII Vert
Rotaries Previously Owned:-
2 x NSU Ro 80s - 2 x S2 RX7s - Suzuki RE 5 - DKW(Hercules) W2000 - Norton (Krauser) Commander

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