87 Jetta 16v
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Everything posted by 87 Jetta 16v
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The standard head was somewhere in the mid 90 cfm from memory on inlet side. This was a full spec, 42mm inlet 36mm exhaust valve sizes with waisted stems. Specially developed and flowbench tested valve angles. Ti caps, ferrea springs, solid lifters, custom designed and ground cams to the flow characteristics of the head circa 300 degree duration and 12 mm lift. Vernier pulleys. BMS throttle bodies (which were cr@p). The bottom end was forged 84.5mm 12:1 cr pistons, rods, knife edged and balanced crank, all set up and balanced to under 1 gram. The whole lot was run through a full engine simulation package after the cams were designed to get some exhaust primary and secondary lengths calculated. The simulation (obviously not done by me!) returned around 315 - 325 bhp depending on the cam timing. Regarding CNC, I would take the numbers with a pinch of salt, hence the "same flowbench by same operator" comment. I quote the numbers for the big valve XE's as having 170 cfm on inlet. Now my head developer does a lot of these for tarmac rally, and he gets around 148 cfm on a 35mm inlet valve, obviously with great area under the lift curve. These engines put out 290 bhp with a 4k rpm wide torque curve of 190 + lb/ft from a 2L bottom end. Perhaps the CNC heads have the ports bored out to huge dimensions, but this will blow an enormous hole in your torque curve. I also heard stories of massive bore adaptors being used which will also give results that would not apply in a real life situation. Who knows!! I know the feeling with the R32, and to be honest, the old EA827 engine code valvers have 100 bhp / L capability in the standard heads too (in ABF guise at least) so I would be VERY surprised if the R32 head design had taken a step backwards. I did have a "moment" last year and bought some Pauter rods and JE 84.5mm pistons for the R. Tbh, I don't think I will ever get round to using them as I seem to have a very large number of "projects" on at the moment!! Proving stuff out is very difficult and as you say, there are so many interlinked variables that have a large influence on the end result. In many ways I am gutted to have not completed the TB'd 12v, but the R came up and I had an impulse purchase moment. With hindsight, perhaps continuing with the original project would have been a better idea. Again, who knows. VAG-hag, mystic blue storm is the way forward :) Have you made any mods to yours?
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I never got mine running in the end, but the tab was well over £6k and I hadn't got as far as an exhaust, radiator, wiring loom, ecu, mapping, etc etc. The head on flowtest made 118 cfm at 10'' depression on the inlet side IIRC. As a comparison, a full race spec 2L twin cam fiat makes around 195 bhp with the same flow on the same flowbench, both tests operated by the same person. Extrapolated out that makes over 290 bhp, so flow is not the issue. As for how many 250+ bhp 12v's, I have never seen a single one. The issue is cost and the lack of any suitable race series to use one in. Because of this, off the shelf performance parts are difficult to come by, so you are looking at bespoke parts and that costs £££'s. £10k is a lot to plough into a toy engine, even if it is unique. R32 is indeed the way forward if you are after "easy" power. Smooth, reliable, (reasonably) economical. I am officially old!!
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I had forgotten about this thread, made me chuckle reading through it again. One popular myth to dispel, it is not cylinder head flow that restricts the 12v VR going past 250 bhp NA, it is the size of the wallet of the engine project commissioner!! I now drive a standard Corrado VR (its the only one that works!!) and jolly nice it is too. One day it might even make it onto a dyno after I change the chains and guides.
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Hi Jon, Unfortunately both are split, albeit small splits. Sorry :( ---------- Post added at 10:03 AM ---------- Previous post was at 10:02 AM ---------- Hi Doug, Sorry I dont :( ---------- Post added at 10:07 AM ---------- Previous post was at 10:03 AM ---------- Hi there, I do have this, complete with motor. Regarding early or late, the car is a 1995 build so I should think it is late. Thanks.
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dragon or pearl!! think lc6u green Drivers door and late bonnet
87 Jetta 16v replied to corradlo's topic in Wanted
I have a late shape bonnet in green. It's straight with no dents, though the laquer has pealed off from it. The foam on the underside is in vgc as is the paint on the underside. I am in Reading, Berkshire if that helps at all. THanks. -
Hi there, Can you drop me an e-mail address via PM and I will send one over. Hoe does £6 posted sound? Thanks.
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I have the rad cover (plastic held on with two screws to the slam panel?) if that helps? Thanks.
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Now there is a thought, I have a very straight bonnet too. Late VR, cr@p paint, good insulation, yours for £25 collected from Reading, or £35 with the hinges...
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I have the gearbox weight, yours for £5 collected or can post at cost, Cheers.
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Hi there, I have a pair, classic green unfortunately. Yours for £10 + postage if that helps, or £10 collected if you are anywhere near Reading? Cheers.
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I have one that came out of the car I am dismantling. No sender though :( I would be looking for £10 + postage (to stealth in the UK would be about £5 I guess) Cheers.
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Hi Ben, I would rather sell together to be honest. The carriers are in decent condition with only a little bit of surface rust. The callipers have fully working handbrake mechs and would make good spare / replacement units. Where are you located? ---------- Post added at 10:22 AM ---------- Previous post was at 10:21 AM ---------- Hi Matt, Sorry, I don't have either of these :(
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I have one, yours for £20 posted if that helps. Shame, my friend went to Manchester for Christmas. Typical!!
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I have one in perfect working condition. Yours for £23.50 posted if that helps? Drop me a PM if it does. Thanks.
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Wanted - Nice Exhaust for my VR, what you got?
87 Jetta 16v replied to 24V Renshaw's topic in Wanted
At £100 you can't go wrong :) Last time I looked on Etka, OEM exhausts were something like £700 from the CAT back. I really hope mine doesn't let go!! -
Where to start :( Mystic: Chains and guides Inner CV boot drivers side Passenger door handle Rear numberplate plinth back to standard unpainted Refurb doorcards Put standard front seats back in Oil leak from sensor on oil filter housing Paint for tailgate "bubble" Clean ISV New genuine rear shocks Drivers side window scraper Polish Sell to fund below!! R32 Rado Get the thing on the road. Massssssivvvvvvveeeeeeee list Spares Sell to fund above!! Girlfriend Retain
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Good working order Late VR6 heater controls & cables needed!
87 Jetta 16v replied to ammo's topic in Wanted
Hmm, I have the cables in good order... -
Wanted - Nice Exhaust for my VR, what you got?
87 Jetta 16v replied to 24V Renshaw's topic in Wanted
Hi Jay, I have a two box magnex VR system (three if you include the small resonator behind the equally small CAT - though I am not sure if the CAT is Magnex, other aftermarket, or a sports CAT of some type) that I don't need if that helps? Btw, if you are still looking, the part number for a lambda is 021 906 265E Cheers. -
And your final chance for Christmas presents you really want ;) Some useful odds and ends finishing tonight at around seven thirty (19.30). Everything has no reserve and most parts are still 99p so please feel free to take a look and have a bid. Thanks for looking. http://www.ebay.co.uk/sch/neal.humphries/m.html?item=220911001406&sspagename=STRK%3AMESELX%3AIT&_trksid=p3984.m1555.l2649&_trksid=p4340.l2562
