Resurrection and development of V8 Project GT1

[mike_sekinger]

80mm eccetric tensioner arrived and with a little milling of the base will make a perfect companion for my shorter aux. belt run.  I`ll add some drillings to allow easy use of the cam belt tensioner tool.

[mike_sekinger]

Just got an update on the plenum fabrication from SMD Racing - coming along nicely.   Matching of the port openings and inlet manifolds still needs to be done.

Test fit on arrival and once the clearances are measured, the fuel rails will be fab`d up. 

Depending on the additional clearance between the plenum and the motorsport rear deck, an additional space might be used to bring up the torque.

This set-up will be fitted once the engine is run-in and ready for the Motec update for 8x larger injectors.

[mike_sekinger]

Another small job ready for plumbing.  Burp tube from the chargecooler radiator back to the header tank.  Will have an in-line reducer.

[EXCEL V8]

Following this with interest Mike!  Fantastic work!  Are the bell-mouths going to be bonded into place on the intake runners? - What adhesive will you use?  Building a similar set-up for my supercharged Elite.

Thanks

Pete

[mike_sekinger]

The bellmouths will be welded on the underside, although I don`t have an image of that

[EXCEL V8]

Thanks Mike - but I meant what's holding them in place in the photo posted on Tuesday - is there a bolted flange I can't see?  I'm not familiar with the 918.

Pete

[mike_sekinger]

The inlet/injector manifolds are bolted to the cylinder heads with the aide of an alignment plate.  The plenum(s) are then bolted to the injector manifold.

[mike_sekinger]

Got the machined eccentric tensioner and it`s looking good. Simplifies the aux. belt run and looses some weight.  Very happy with that.

[mike_sekinger]

Rear cross-member re-designed and fabricated using 40mm x3mm tube.  This is to provide clearance for the gearbox and greater strength in the rear.

[tomcattom]

What's the bit of hose on the back of the radius arms for? I assume it hose, there looks to be a jubillee clip on each end of it.

[mike_sekinger]

Those are connections for the remote damper reservoirs for the Penske 3-way dampers

[tomcattom]

Ah, that picture makes things clearer 🙄

[mike_sekinger]

Considering some additional engine oil cooling up-front between the two existing coolers.  Options for either 6 or 10 row slimline unit.  Will be able to minimise the airflow impact on the chargecooler and main coolant rads.

[mike_sekinger]

It was bitterly cold in the workshop today (-8 deg C), but I really wanted to get the new front splitter finished and installed.  This is allow me to have the car run at a more desireable height on the road.

 

[Erikl]

I think you mentioned elsewhere but I could not find it.  What material did you select for the splitter?

Do you have an electronic template for the splitter that you could e mail us so I could cut one 🙂

It looks fantastic - really works perfect for the body kit. 

[mike_sekinger]

I used 8mm thick high density polyethylene, which can be supplied black.

There is no electronic template as it needed to be crafted together with adaptions to the arches.  I have the other half of the polyethylene sheet and plan to made a spare.

 

 

[mike_sekinger]

Motorsport plenums arrived.  Excellent work from SMD Racing in Kent.

Measurements for fuel rails and the throttle cable bracket to follow.

[alanlambert]

Nice fabrication hope the throttle boddies will be easy to balance.

I found on mine, the biggest restriction in the induction side was the tight bend in the nearside pressure pipe out of the  turbo's. Have you managed to redesign these?

Edited December 28, 2021 by alanlambert
detail

[mike_sekinger]

There is a linkage between the throttles and also a balance pipe across the plenums.

The arrangement will be different with the tubular manifolds and BorgWarner EFR turbos.

Andrä managed to get some GT2871s installed by changing the compressor housing orientation and adaption of the wastegate flap on one side.  I`ve seen this done on other 918s before.

[mike_sekinger]

Matching the porting of the cylinder heads to the injection housings.   Both are being taken out to the extremes of the metal gaskets.

3 hrs in and only one bank done.  Takes time and care...

[mike_sekinger]

Small jobs.... low profile plug for the thermostat housing coolant bypass.

PAS low pressure pipe installed to ensure clearnace from the new aux belt run.

[mike_sekinger]

Sorting the throttle linkage and playing with the position of the cable bracket.  Will need to make some changes to the cable length.

[mike_sekinger]

Porting and matching of the RH bank injector manifold to cylinder head.

Blanked off the crank breather to cam covers. Will have a ctach tank instead.

[mike_sekinger]

Getting ever closer to installation. The fresh engine will initially be started-up and run-in with the old plenum arrangement.  The new flywheel for the 140mm carbon clutch is also pending, but should arrive shortly.

Re-mapping of the Motec for the motorsport plenums, bigger turbos and larger injectors will be a task for later this year.

 

[DanR]

Great work Mike. Like the eccentric throttle cam. Not many do that.