Resurrection and development of V8 Project GT1

[mike_sekinger]

Yes, correct.  Tranmission oil cooler.

[mike_sekinger]

Edging closer...

Transmission oil cooler plumbing and oil cooler bypass for the establishment of oil pressure and initial start-up.

[mike_sekinger]

Well some progress but no start:

- car back-up on stands for 1st start

- Coolant filled and with the help of the EWP, system bled without starting of engine.  There is no thermostat, so the pump can circulate the coolant and move the air up to the bleed points

 

Gear oil, PAS fluid and engine oil filled.

EWP was showing a low battery, so purchased a new battery and charged overnight.

Noticed a very small drip from the front chassis coolant pipe connection. Overnight it amounted to very little, but still enough to warrant action.  Not so easy to get to but now tightened and dry.

When removing B3 fuse and plugs for running-up the oil pressure, the new battery is showing low (crazy coincidence), so will be going back for a replacement.

Everything else is ready to proceed but need a good battery to spin the engine on the starter.

[Bibs]

So close! Please video the start, looking forward to the noise

 

[mike_sekinger]

It`s been a long journey, but the engine is running !!!!

The engine revs so quickly with the lower mass.

   Pretty happy right now.

 

 

[Bibs]

Good god yes  

[Tim H]

Sounds awsome.....👍

[Trevsked]

Great, my iPad won’t play it 🙂

 

Trevor.

[mike_sekinger]

@Trevsked I can email you the files if you like?

[Trevsked]

Perfect, yes please. Trevsked@yahoo.com.

 

Regards T.

[TAR]

That sounds epic! 

 

[Barrykearley]

I’m am stunned at just how freely that revs. It picks up so quickly its incredible 

[Escape]

She looks angry and anxious to go, very impressive!

Congrats!

[mike_sekinger]

Thanks for all of the encouraging comments.

I`ve got to program the Shift ECU before she turns a wheel inside or out. The Motec engineer will also be coming out for some further optimisations, although there is no firm date for that.   Rough plan for a test session at an runway sometime in September.

Also hoping that the CNC uprights will arrive in September so that I can fit the final hardware line-up.

[skiing]

Amazing. I will just line up my lottery win so I can snap this up when you are finished. Might need a little sound deadening and a stereo for use in London of course. 

[mike_sekinger]

On with preparing for the Motec changes:

- elevation of engine rev limit

- ignition retard for torque reduction (flat upshifts)

- change of gear ratios

- increase size of 8 primary injectors and remove secondaries

- aim boost increase

[mike_sekinger]

Gear position programmed.

Reverse - 0.28v

Neutral - 0.90v

1st - 1.50v

2nd - 1.92v

3rd - 2.52v

4th - 3.36v

5th - 3.58v

6th - 4.58v

M800 will also derive the selected gear based based on RPM and wheel speed

 

 

 

 

 

Remaining wiring in the footwell is for the brake switch in order to blip on downshift only when braking.

[mike_sekinger]

Wiring all finished and tidied away.

Time to install the seat and bring some order to the cabin.  All important information is visible without being too cluttered with dials and gauges.

 

[mike_sekinger]

Todays funny incident.

I have a carbon steering cowl that was produced to be in keeping with the other interior parts.  Today I finally got around to connecting up the horn, which is a push button affair on the steering wheel due to the removable nature of the wheel.

I connected up the horns and turned on the ignition - immediately the horns are blasting.  Switch off and remove the steering cowl to check all of the connections.   Test the horn while apart and all is working fine..... I`m confused.

Then it dawned on me that the cowl being carbon is shorting the horn connections when screwed into the lower brackets which are connected to column ground...  Plastic screws and isolating rubber washers and now we have a working horn.

Probably not worth all of the trouble, but did make me smile at my initial stupidity.

[Trevsked]

Seems like you’re not far from turning a wheel?

 

Trevor.

[mike_sekinger]

@Trevsked I`ve got to bleed hydraulics for the brakes and the clutch and also set-up the maximum throw on the carbon clutch pack.  I would hope to be able to test the gearbox on the axle stands shortly, but the car will not go outside until a thorough 1st test next month.

[Trevsked]

Fast progress Mike. What’s the black box that appears to be plugged in to the dash to the right of the steering wheel?

 

Trevor.

[mike_sekinger]

That`s the removable Motec UTC (USB to CAN) adaptor.  It`s used to communicate with the ECU and ADL (dash logger) manager software.

 

[cweeden]

On 15/08/2022 at 12:14, mike_sekinger said:

It`s been a long journey, but the engine is running !!!!

The engine revs so quickly with the lower mass.

Hi Mike, 

What are the engine components that are lighter than stock? Is it rods, pistons, flywheel and clutch or are there more lightweight bits too?
The way it revs is so appealing and it sounds great. Are these with stock exhaust manifolds or tubular ones? Sorry if this is all documented here, I haven't been back through the thread to check.

cheers

-Chris

[mike_sekinger]

Hi Chris,

Of course it`s all detailed in the depths of the thread, but to summarise:

- Forged pistons (incl. wrist pins and clips) are 4.5g heavier than a stock Grade A piston

- Saenz rods are also marginally heavier, but I do not have the figure to hand. The Saenz rods are designed to cope with the stressed associated with much higher power levels.

- Main weight savings are coming from the flywheel and clutch assy, where all together I am 5Kg lighter (500g on the flywheel and 4.5Kg on the clutch)

The manifolds are currently ported cast ones mated to a pair of hybrid billet compressor turbos, which will be used for the first stage of the engine running.

A pair of tubular manifolds are in fabrication for use with the BorgWarner EFR 6258 turbos, but that is a future enhancement that will require changes to the chargecoolers and induction routing.  Those turbos can support sufficient flow for between 450 - 800bhp.

Cheers,

Mike S