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Autotune Gemini 4C8 R1 First start.
TimC - 10/12/17 at 08:45 PM

YouTube Link - if it’s not on camera, it never happened, right?

The faffing at the start of the video is me ensuring that the extinguisher is ready.

I am a smidge effing delighted.

[Edited on 10/12/17 by TimC]

andy188 - 10/12/17 at 09:20 PM

sounds sweet, b carefull with them fumes.

Camber Dave - 11/12/17 at 09:00 AM

Just a few seconds after many hundreds of hours of work,
But it means everything, I reckon.
Congratulations Tim

TimC - 11/12/17 at 10:09 AM

quote:
Originally posted by Camber Dave
Just a few seconds after many hundreds of hours of work,
But it means everything, I reckon.
Congratulations Tim


Thanks Dave. It makes a big difference. I’ve got a new trailer on order too so I will definitely be across to see you in the new year for suspension set-up etc.

Kev99 - 11/12/17 at 11:41 AM

Great Feeling that is Tim getting it started for the first time

Its a great little engine the 4C8 but do not forget to baffle plate it and do the rocker cover mods

Mines been in about 4 to 5 years and has taken a lot of abuse and still keeps giving

Kev...

TimC - 11/12/17 at 12:00 PM

quote:
Originally posted by Kev99
Great Feeling that is Tim... do not forget to baffle plate it and do the rocker cover mods

All done! Great to hear about your reliability.

adithorp - 11/12/17 at 12:08 PM



Don't think I could have avoided the temptation for so long though.

TimC - 11/12/17 at 01:52 PM

quote:
Originally posted by adithorp


Don't think I could have avoided the temptation for so long though.


I had intended to do it a couple of weeks ago but when I added the coolant I literally filled the engine - the o-ring on the water pipe that goes into the water/oil pump had failed and the sump filled with expensive coolant. I was not happy and had to drain everything, replace the o-ring, sump gasket blah blah...

But then, you weren’t talking about starting the engine just two weeks’ ago...

CosKev3 - 11/12/17 at 03:15 PM

Sounds well

That garage is way too clean though!

emlyno - 11/12/17 at 07:29 PM

Congratulations Tim, it's been a long journey but you're getting there.

TimC - 16/12/17 at 03:05 PM

And it now moves...


Not without issue however: Digidash doesn’t like RPM signal and my rad is pretty useless.

Still, winning overall - very happy with clutch feel in particular.

daniel mason - 16/12/17 at 05:26 PM

Have you tried running the tacho from the coil pack?
Car looks nice btw

adithorp - 16/12/17 at 06:14 PM

Nice

Whats the issue with the rad'?

TimC - 16/12/17 at 06:46 PM

quote:
Originally posted by adithorp
Whats the issue with the rad'?


Well, sat for 15ish minutes at 6deg ambient and it was up-at 100deg. Firstly, some plonker didn’t think a fan would be necessary. Secondly it’s an ancient Serck unit that probably isn’t as good as it should be. I am however a bit scared by the cost of new custom rads. Oh well.

What temp will yours sit at Adi? I should say that my oil temp is yet to go above 60-odd deg.

adithorp - 16/12/17 at 07:10 PM

I wouldn't worry about it then. On mine without the manual fan switch on or any airflow it'll go all the way to the ECU fan switch on at 105c. Won't take too long either. Once warmed up/run it will rise rapidly once stationary so I'd say you def' want a fan.

TimC - 16/12/17 at 08:54 PM

Interesting- I might throw a fan on it and see what happens.

Mike Wood - 17/12/17 at 12:27 PM

Tim

Great to see your Autotune Gemini starting and moving. Racing in 2018?

What's happened to all your various car build blogs?

Cheers
Mike

TimC - 17/12/17 at 07:33 PM

quote:
Originally posted by Mike Wood
Tim

Great to see your Autotune Gemini starting and moving. Racing in 2018?

What's happened to all your various car build blogs?

Cheers
Mike



Hi Mike,

I’m hoping to do something with the CSCC Open Series and/or Welsh Saloons and Sports.

Life has sort-of got in the way of blogging - that and Google deciding to no longer offer an interface for iOS.

I do have an unpublished update somewhere which I penned on holiday - might see if I can do something with that.

Cheers

TimC - 10/7/18 at 07:29 AM

I thought I’d keep the thread running...

The Gemini has been on the dyno - didn’t go bang but didn’t ‘do the numbers’ due to the ECU not liking something. This is in-hand and I should be back on a RR either later this month or at the start of next.

adithorp - 10/7/18 at 07:56 AM

So what numbers did it make?

TimC - 10/7/18 at 09:51 AM

quote:
Originally posted by adithorp
So what numbers did it make?


A massive 125.22bhp. Drive by wire throttle was closing at 10,500rpm so it just wasn’t getting into its stride. Unfortunately PDQ don’t have a space until 10th August so I’m contemplating dragging it to Harrogate.

adithorp - 10/7/18 at 02:26 PM

If by Harrogate you mean Damian at Daytunner I can recommend him. Did a great job on mine last month.

Any idea what's causing the problem with the ECU/throttles?

TimC - 10/7/18 at 03:59 PM

quote:
Originally posted by adithorp
If by Harrogate you mean Damian at Daytunner I can recommend him. Did a great job on mine last month.

Any idea what's causing the problem with the ECU/throttles?


Yes, that’s the thinking - it’s just SUCH A LONG WAY.

Well, I’ve just cleared the error history and all is now well so it looks like I’ve got a restricted US-spec ECU. The ECU is off to Track Electronics tomorrow for John to work his magic. YCC-T is a bit of a pain.

TimC - 16/7/18 at 11:08 AM

quote:
Originally posted by TimC
... it looks like I’ve got a restricted US-spec ECU. The ECU is off to Track Electronics tomorrow for John to work his magic.


Confirmed to be the case. Only 80% throttle over 10,500rpm. Not all that conducive to power.

TimC - 10/8/18 at 07:37 PM

A more successful day at PDQ with a functioning ECU. Oh, and hellacious flames.

adithorp - 11/8/18 at 07:33 AM

Nice!

And the numbers are...?

TimC - 11/8/18 at 08:22 AM

136rwhp.

Not brilliant but not bad - interesting that this sort-of confirms for me that the 4C8 may 2-4 bhp down on 5VY in our application. Given the extra hassle that comes with 4C8, well errr. What was your lb/ft on the standard motor? Anyway, I did get to drive it down the long drive at Track Developments later in the day and it feels smooth and strong.

Cooling etc seems to be spot-on so I’m pretty happy. And then there’s the flames...

adithorp - 11/8/18 at 02:23 PM

I'll have look up my original RR sessions (they're in a file at work).

Current tuned motor is way above standard.

TimC - 11/8/18 at 05:37 PM

quote:
Originally posted by adithorp
Current tuned motor is way above standard.


Over-compensating (for the windscreen)?

adithorp - 11/8/18 at 06:21 PM