French GC8 (slow) project

**xAv** · 23rd February 2013, 09:58

Originally Posted by Chartreux

I'm very happy to hear this. I still hesitate between SC42 and SC46 to be honnest. I know that SC42 will be more responsive, but SC46 can be pushed in the range of 450+ with right fuel. As I plan to upgrade my new heads (AVCS big port) to have rev at 8k+... still unsure about turbo choice.
I don't want to go rotated for the moment.

I'm sure SC42 able to puch 450+ with E85 !

**Chartreux** · 24th May 2013, 06:12

Hi,

Some news about engine.

Here is what I received from Enginetuner

Spec as follow :
EJ20 CDB with oil squitters
Mahle pistons (92.5mm)
K1 rods
79mm STI crankshaft
Rear end thrust bearing
AVCS Big port heads
Stock camshaft
+1mm cosworth exhaust valve
mild head porting
ARP Head Studs
Cosworth head gasket

Test fit

CDF parallel fuel rails

Question : what does it miss on this picture ?

...to be continued

**MAD Hammer** · 24th May 2013, 08:59

They do make a tidy job of things at enginetuner.

**Chartreux** · 24th May 2013, 15:17

Yes, I'm very satisfied with the quality of job, Alan is really nice guy and I hope that the result will be great. I'm looking forward !

**Chartreux** · 5th February 2014, 09:01

Some new updates (pictures will be added soon)

I collected Syvecs S6 PnP thanks to Jura.

Based on the epic topic about twin scroll turbos, lots of readings and discussions with Simon @ chevron, and when I saw results, I think it will closer to the result I'm looking for. I want good response/drivability instead of chasing big numbers.

So I've decided to change plan a little bit and go to Twin Scroll route with Chevron TMIC and Chevron/owen turbo with WRC bearings.

... to be continued

**Chartreux** · 25th July 2014, 13:39

Small update since loooong months

I've decided to stick with the Lateral performance IC Rad combo for the moment :

The Syvecs S6 PnP ECU

Phenolic spacers from GB on this forum (thanks Jaimie). Very good quality parts.

DW 750cc Injectors

Turbosmart 3 port boost solenoid

OEM Twin Scroll Header and Up Pipe

Oil pump 12mm (OEM)

....to be continued

I've talked to Simon @ Chevron, and he told me that the TS Turbo with WRC bearings was difficult to map (at least different), so he recommand me some mapers, but I'd like to know if someone know how to map it correctly to get the best results ?

**johnybon** · 25th July 2014, 20:01

Hi mate engine looks sweet why did you go for a 2.0 instead of a 2.1 ? Reason why is I have a ET 2.0 cossie forged I was trying to sell but have now decided to use with big port spec c heads what power do you think you will get from it. Great build by the way I will be watching this :-)

**Chartreux** · 25th July 2014, 23:22

Hi mate,

I've gone to the 2,1l route (92,5mm x 79mm).

I don't have figures in my mind, I don't want to beat numbers on the dyno.
I would be pleased if I can have good balance between response, spool and lag, in the same spirit as johnfelstead's STI. A perfect road car able to be a real threat on the track.
Power between 400 and 450 would be great for me on a wide range of RPM.
;-)

**JAMIE - TYPERV6** · 26th July 2014, 00:49

Very impressive Thierry. Delighted you were happy with Thermal Spacers.

**Chartreux** · 6th February 2015, 14:26

Some updates of my built.
I found a rare LHD prodrive quick steering rack from a Groupe N.
Now it's no more 3,2 turn, but 2,2 turn !!
I just finished the swap, I didn't really made road test for the moment, tomorrow I'll make alignment and then test !!
But seems a loooooot quicker

I've changed tie rods and boots too
Can't wait for test drive !!

**John Stevenson** · 6th February 2015, 23:01

I need a lift to Courchevel on Sunday so if you can make sure it's ready for then that would be good

---john---

**Chartreux** · 7th February 2015, 10:56

You will enjoy skiing, there is a lot of snow ! It's subby time !!

We can see it's clearly shorter
Before
https://vimeo.com/118986694

After
https://vimeo.com/118986725

Alignment done today. I'm very happy with this quick steering rack, it's worth for the money !!!

John, lift is ready 😉

**Hyper** · 8th February 2015, 12:27

there was no snow there when I was there on jan 4-13

half of mirabel slopes were full of grass and ice

**Chartreux** · 21st April 2016, 16:21

It's a long time I didn't updated this thread.

The main news are the following parts arrived :

Bilstein PSS9 + STI GrN top mounts (not pictured)

New 5x100 front knucles with spacers (legacy 2010)

Bosch 044

Injector Dynamics 1000cc

Turbo finally here, and direct from Simon @ Chevron (big thanks to him)
Made magic, with this VF36 exhaust housing :

Transformed into this (who will see what it miss on the cold side housing ???) :

Inlet Hose

**Hyper** · 21st April 2016, 16:55

no nipple for boost solenoid?

btw, what are the turbo specs?

**Chartreux** · 24th April 2016, 10:09

Turbo is more or less the same than John Felstead

Here are some more pictures compared to standard VF36

https://vimeo.com/163977046

**Chartreux** · 25th April 2016, 11:19

12mm oil pump in :

SKF Water pump fitted

Syvecs ECU in the case

OEM Downpipe commparison. Twin Scroll Downpipe vs Single scroll Downpipe. The OEM Twin Scroll Downpipe will be used for emission test... surprisingly, the both downpipe seems to be the same length

FPR Test fit

Mocal Sandwich Plate

**Chartreux** · 3rd February 2020, 13:45

Some update since 4 years now !!!

Finally my clutch decided to pass away so I was decided to remove the engine to change it and replace the motor by the new one. I spent around 1 year finishing to built the engine harness, buying stupid things such as bolts, connectors and various adaptation plates. I custom made some parts also, and now it runs !

Finally the engine is in :

The beast is out

Some power after remap, not E85 yet

Nagisa Fender Brace (very happy with the feeling)

**Mr J** · 13th February 2020, 14:19

Nice work

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