Knackered old Porsche with loads of natural light - Boxster!
Discussion
Howitzer said:
He will be producing a kit with all the main parts needed.
He doesn’t know this yet but the people want this.
Dave!
This does appear to be the case He doesn’t know this yet but the people want this.
Dave!
There are enough people so far that have said they'll have a kit if I make a kit that it would be worthwhile doing..... but let me finish this one and do some validation etc. first - if nothing else to work out what that kit needs to actually contain!It seems those that are interested have a wide range of wants for the engine ranging from a standard BAM to 500bhp+ built engines so sensibly any kit would need to be some sort of "fit kit" that saved all the hassle and design work of actually getting a 20V in the car but excluded all the engine related bits. So something like front engine mounting, some pre cut steel parts and drawings to make modifying any other mounts/cross members etc. easy, flywheel, gearbox bolts, fuel pump, any required cooling/fuel line adaptors etc. and a decent manual on how to do the rest. That way everything chassis side is accounted for and the rest is just what engine spec you want.
Leave it with me and once I've got this one together I promise I'll do a kit
eltax91 said:
How much is a used 2.5/2.7 worth? Enough to buy a standard BAM and a ‘kit’?
Seems to be £1750 - £2250 for a 100K mile but running 2.5 on the bay so that would be a big chunk towards it!I think you'd be better off finding one with a dead engine though, I saw a none running 2.5 that needed a new rear window stitching in go for £2100 the other day and there's a blue one on e-bay that looks lovely for £2995 spares or repair at the moment... you'd probably get £500 back for the dead motor too.
poppopbangbang said:
Seems to be £1750 - £2250 for a 100K mile but running 2.5 on the bay so that would be a big chunk towards it!
I think you'd be better off finding one with a dead engine though, I saw a none running 2.5 that needed a new rear window stitching in go for £2100 the other day and there's a blue one on e-bay that looks lovely for £2995 spares or repair at the moment... you'd probably get £500 back for the dead motor too.
Because you said you’d had a few who said they would defo buy a kit…. I assumed they had working/ running 986’s I think you'd be better off finding one with a dead engine though, I saw a none running 2.5 that needed a new rear window stitching in go for £2100 the other day and there's a blue one on e-bay that looks lovely for £2995 spares or repair at the moment... you'd probably get £500 back for the dead motor too.
A used BAM appears to be about £500. So that’s £1250 or more towards a kit. Handy
Edited by eltax91 on Monday 1st January 15:59
was8v said:
@poppopbangbang any ideas on a budget way of getting an LSD in these gearboxes?
So I many have looked into this already Plate type option then Guards is very good but it's about two grand landed! OS Giken do a plate type but that's even more than the Guards. Final option I've been able to find on this is KAAZ who do a plate type at about £1100 but I've never used their stuff before, however a lot of people have with seemingly excellent results.
If you don't mind an ATB (which lets be honest are absolute fine for the vast majority of stuff running road tyres and likely much nicer to live with on a dark, wet road) then Quaife do one at sub a grand.
None of these are really budget though, the only budget option I've been able to find is Traction Concepts in the states who do a conversion kit for the stock diff at about 300 quid. I have no idea how well this would actually work though as I'm guessing the mode of operations is by providing some spring preload against the side gears which will indeed give a semi-locking effect but the same amount on and off throttle. If it's a pretty light amount of lock this is probably peachy but of course you don't get all the advantages a plate type will give around fully locking on throttle and a lesser amount of locking off throttle.
I'm tempted to try the Traction Concepts one as it's such a cheap option!
was8v said:
I'm think buy a bore scored Cayman on copart for next to nothing
Part out the engine and gearbox
Get a 5 speed boxster box,
Get a crashed BAM car on copart.... fit with poppops kit.
Great plan! I'd love to see a Boosty Cayman Part out the engine and gearbox
Get a 5 speed boxster box,
Get a crashed BAM car on copart.... fit with poppops kit.
Autofarm / Hartech may want the scored motor as a core so that would be an easy way to dispose of the old lump, flog the ancils seperately on e-bay along with the ECU, loom etc. and I bet you'd get a big chunk of the purchase price back.I think a mildly shunted / MOT fail TT 225 is the perfect donor for this, less than a grand and they come with every bit you're ever going to need and are on ME 7.5 management to start with.
eltax91 said:
Perfect base car! Sub 100K miles, good colour, underside is all there and doesn't look to have been over anything too big. It'll be interesting to see what that goes for!I think you definately need a diff if you want to make decent power. I've used a KAAZ in the 5 speed, I loved the way the car was with it. It was a bit clunky though, I added quite a bit of friction modifier to try and improve it's road manners. It was decent in the main but you did still notice it with the odd skip or clunk with low speed manoeuvres. When I went for more power I moved to a 6 speed which already had a Quaife in it. It's silent, you feel it do it's thing but it's totally drama free. Perfect for a road car but it has lost a bit of the edge it had before.
https://emcmotorsport.co.uk/ were the best suppliers for KAAZ LSD's, they carried them in stock and were around £850 at the time but that's going back a few years.
If you went 987 6 speed, there is an OBX diff that's cheap. It's an ATB and I read it's a Chinese copy of a Quaife. Works out £360 delivered plus whatever the import charges are. No idea if they are any good.
https://www.ebay.com/itm/185824604069?epid=1876255...
https://emcmotorsport.co.uk/ were the best suppliers for KAAZ LSD's, they carried them in stock and were around £850 at the time but that's going back a few years.
If you went 987 6 speed, there is an OBX diff that's cheap. It's an ATB and I read it's a Chinese copy of a Quaife. Works out £360 delivered plus whatever the import charges are. No idea if they are any good.
https://www.ebay.com/itm/185824604069?epid=1876255...
was8v said:
Get a 5 speed boxster box,
The 1.8t will also bolt up to a 987 6 speed. The 6 speed is a stronger unit apparently, it's certainly much bigger and heavier. I know of a 2.7t swapped Rallycross car that was sub 400bhp that has blown up a few 5 speeds.Escy said:
The 1.8t will also bolt up to a 987 6 speed. The 6 speed is a stronger unit apparently, it's certainly much bigger and heavier. I know of a 2.7t swapped Rallycross car that was sub 400bhp that has blown up a few 5 speeds.
It's all about the torque, the 5 speed is really only good for 300 ftlbs, maybe a sniff more at higher RPM in third and above (as there is less chance of breaking traction). You need to be making 330ftlbs to make 500bhp at 8000RPM which is already 10% over what the box and a stock RS4 clutch is good for according to the OEM, 300ftlbs at 7K RPM gives 400bhp on the nose. It comes down to how much turbo speed you want where, I went for quite a large turbo and an external gate so I could draw a pretty flat 300ftlb torque curve and I think the boost control in the ECU is good enough to do it as it's got some really sensible strategies there which many are lacking. This will feel very linear, is very kind on the box, have a wide power band and if you want to pop a few laps in then it's just as quick but it certainly won't be the fat in the middle, all the turbo speed all the time that the rally boys want.... I was involved in a WRC engine program 15 years ago that was making over 900NM at 2K RPM, that was a challenge for the box
If you ever get chance to look at some strain gauge data from a pair of driveshafts it's amazing any bits of the box survive use, the gearbox design guys are absolutely mega mechanical engineers!
poppopbangbang said:
eltax91 said:
Perfect base car! Sub 100K miles, good colour, underside is all there and doesn't look to have been over anything too big. It'll be interesting to see what that goes for!
poppopbangbang said:
eltax91 said:
When I win it, I’ll have it delivered straight to you with a bag of cash in the boot for the conversion?
Am I allowed to finish mine off first? You're handy with the spanners, surely you wouldn't want to miss out on the fun of a build? 
https://www.pistonheads.com/gassing/topic.asp?h=0&...
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