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gee_fin

Build Diary: Westfield SEiynergy - how much power is too much power?

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After reading this thread I thought that I might fit Synergy's cheapest normally aspirated V8 (the 2.4L 405bhp one I'm guessing?)

But then I clocked that a crate LS3 engine was about a sixth of the price so that rose to pole position..

Or leave the Westy alone and build a 1020bhp Ultima !!

Maybe subsequent updates to this thread might help me decide !?!

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The crate LS3 is the sensible option for sure, but soooooooooooo dull. Pretty sure the Chevy V8 has been done in a Westfield too, sure I saw one 15 years ago...

So, shall I contact Synergy about a bulk buy? :d

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Good plan.. I could install their V8 and a sequential gearbox in my Westy for a lot less cash and build hours than starting from scratch with the Ultima.. 

What do you expect the dressed engine to weigh?

Will you be fixing it to the Westy chassis engine mount holes or going bespoke?

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I believe about 90kg.

Pretty much everything about this will be bespoke really. We've lucked out in that there is an off-the-shelf bellhousing to the Quaife (available from Momentum Motorsport http://momentummotorsport.co.uk/), just had to let Synergy know to build the engine connecting plate accordingly (which they had done before).

But for things like engine mounts, it will be coming with what they used in the Subaru BZ, those will be modified along with the chassis to suit.

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Slowly does it... engine is now just about ready to ship, only a final checkover to go. *excited*

As ever, no time is idle. Modifications continue to the chassis, hopefully be getting it FEA'd at some point too.

Sourced clutch...

clutch.thumb.jpg.c139d63a681e1218eeb4b83ca3ce3bed.jpg

Twin-plate 7.25" AP, this was recommended over the 5.5" by Synergy due to the road usage of the car. Will need two new friction plates to match the 24 spline input shaft from Momentum Motorsport.

Water pump sourced, engine uses the BMW solid ones. Look like little mini turbos...

wpump.jpg.c13835c84273e295c336ebe71f7e1e60.jpg

Pedal boxed sourced :-

s-l1600.jpg.c706505e4283299d6e71461a70b362ec.jpg

Took a while to settle on this, ultimately wanted AP but at 2grand a pop it would be just silly. Looked through the OBP range but just didn't click with me, Wilwood pass, Comp. Braking has some nice ones (looked like reworked/rebranded OBP at a better price), Tilton came close but still, not perfect. In the end found these out of Argentina (!), seem to be a very close clone of the Tilton series. Very decent price too. Just need to fit a dual fly-by-wire throttle pot and should be good to go.

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So diff setup... given we're going to be anywhere from 700bhp-1000bhp it was/is a bit of a quandary. Dan's MegaWatt is running around 500-600bhp and about 1000ftlbs but that's through one fixed gear. His little Quaife ATB in the Sierra 7" has held up remarkably well. No signs of issues with it at all yet - despite drag launches, driving like a lunatic, 100% slick use, etc. etc. However, that is just one gear, no shock loadings from flatshifts/dogboxes, the roads here are pretty slippy and the track isn't prepped... this new car is six gears and I do plan to send it regionally and to prepped surface tracks. So what options?

Subaru? Passed over. Looked at the older BMW LSDs (those without all the electronic rubbish) which while an M5 one might have done the job, just can't get the ratio - need a CWP of 5.something to get the gearing right. Looked at the S2000 diff, but forums seems to say they're not up to much over the standard bhp from the car - the forced inductions ones go to the Ford 8.8 diff (heavy, cumbersome and seemingly quite expensive if you don't know how to cherry pick the parts), others look at the 300ZX diff. Kits were $3500 for them!

Didn't feel 100% with any of those, so, what next. Well, bright suggestion from a friend was the Toyota Supra. Looking into it, they are well spec'd, well documented and have a good track record putting down insanely large figures. A bit of searching later (thanks US eBay) and I now have a fresh Mk3 LSD winging it's way from the US to County Durham all for under 500quid including postage. Not bad...

s-l1600.thumb.jpg.52f9c4c9c5b0088a4c2f5a77a56bd131.jpg

Liking the many mounting points on the back...

s-l16002.thumb.jpg.b6ea8e2b13d7029dd85b617e802a42da.jpg

Will obviously require some rather special fabrication from Plays-Kool and some custom driveshafts but feeling a bit more confident with this one's ability to handle the power, torque, launches and abuse.

Weir Performance (http://www.weirperformance.com) do a 5.7 CWP along with an uprated shim/clutch/spring kit, so will be ordering that on Monday. A bonus is looking at the vids and examples around the diff doesn't need any fancy, specialised tools to work on it (unlike the Sierra) so *hopefully* maintenance will be a lot simpler.

The gearing charts, well, at 12,000rpm in 6th it'll be good for 160mph. Don't really plan on getting there though, car would likely take off airbourne long before that figure is reached! 6th is an overdrive anyway, 1:1 is 5th and it's geared for ~145mph 1/4 mile and most medium straight length circuits with this setup so pretty happy. Now will require some magic from Luke to package this setup up...

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Looks like more great components are winding their way into your project :-)

Incidentally my Seight hits 160 at Spa and still feels planted.. (The front aero wings crack / grind away though - might need to trim or beef those up!) 

With your power you'd be revving out at the fast uk circuits... (Silverstone, Snetterton, Bedford GT,,)  You'd also probably only need 1st & 2nd for parking and traffic jams !?!  But in terms of optimising it's drag credentials and hopefully blowing away the Evo and wrestling back the record from  it's blue nemesis, it's spot on :-)

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160, wow. What aero are you running? The SEight donor came with a MickMade front splitter but I do need to look into other aero. Have one of the whaletail rear SEights things here, can use that if need be but I've been meaning to look into more modern and aesthetic solutions...

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Just the CSR style front wings and a home made chin scoop on an FW body with an aero screen. My bonnet and nose also have loads of vent holes (maybe that helps reduce lift..) Plus a smidge of rear toe-in keeps it from wandering about.. 

With the 415 lbft it just doesn't stop accelerating on that long uphill straight after Eau Rouge :)

(More typically it hits 145 in the uk - hence my suspicion that you'd be bouncing off the limiter at the faster tracks..)

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On 15/09/2017 at 16:49, gee_fin said:

Pedal boxed sourced :-

s-l1600.jpg.c706505e4283299d6e71461a70b362ec.jpg

Took a while to settle on this, ultimately wanted AP but at 2grand a pop it would be just silly. Looked through the OBP range but just didn't click with me, Wilwood pass, Comp. Braking has some nice ones (looked like reworked/rebranded OBP at a better price), Tilton came close but still, not perfect. In the end found these out of Argentina (!), seem to be a very close clone of the Tilton series. Very decent price too (under 300quid before postage/duty). Just need to fit a dual fly-by-wire throttle pot and should be good to go.

Ooo, pretty! I'm in the market for the same sort of thing. I have floor mounted petals but early ones and now need twin brake MC's, clutch MAC and flyby wire accelerator. Have you already ordered? If no and they are going to Luke's maybe we could buy together?

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Ordered and by him already - there in two days from Argentina! Most impressive. It was two orders effectively, the clutch/brake are a 2piece, the throttle is 1 piece. Not sure how straight-forward fit they will be and need to either buy the Tilton FBW kit to fit or see if it can be bought standalone as just the sensors. Either way, I'd say a quick chat with Luke is in order.

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Next up turbos. They don't need to be insanely large, I was even half tempted considering something like the tiny cheap TD05 on the Busa - they're a dime a dozen, easy to get hold of everywhere and spool very quickly. However, we're going all out on this build, so let's keep it going - Borg Warner.

The recommendation is a pair of Borg Warner EFR 6758-As (PDF spec attached). I have to admit, turbo knowledge I certainly lack in and as such will be going on the Synergy recommendations here quite a bit. The turbo's are about 10x each the cost of a 2nd hand TD05 but will hopefully deliver. Small enough to hopefully package somewhere sensible without ruining the lines of the car too much...

borgwarner-efr-6758-turbo-0.jpg.bf5ded4e58ef71bbfe4b2f1b76f3dbc5.jpg

More parts on the way, twin Bosch 044 pumps (eBay genuine) and brake balance adjuster (McGill Motorsport). This evening's work will be trying to source a small plumbed in extinguisher...

EFR 6758-A.PDF

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@gee_fin Graeme, what time between rebuilds are recommended by Synergy, especially on something with twin turbos on it? I'm in serious consideration of buying an SR8 (the one you posted on fb actually) but slightly off-putting is the low hour rebuild and cost associated with it if carried out by RPE 4-6k! Looking into it now to see if anyone else can rebuild these, I think it'll mainly be a case whether anyone other than RPE has the build data for the engine.

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I think Adrian still has a powertec V8 sitting in one of his sprint cars.  Probably worth messaging him.

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