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Nov 23, 2006 13:11:32 GMT
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this is a gr8 lil car slater, love the sticker too! hehe! i'm going to steal your water jacket mod too, looks a good idea to me to help water flow/cooling where the pump mounts, i'm putting a 998 turbo motor together for my car, high reving but low boost, no more than 12psi, 14psi very very tops at the drag strip, no more defo! i watch your build, its a must
what rims did you have on the mini, size & type, just curious
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Mini 998cc grp bonnet & boot, lightend shell, 6-point cage, soon to have a turbo on the 998 engine (t2 frm a r5gt) rs turbo intercooler, hoping to get 120ish bhp?
father is building a Mini Van 1330, 45 weber, 100bhp@wheels
'RIP' 1.8 Metro GTi, 15.23 1/4mile
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Nov 23, 2006 15:00:43 GMT
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Last Edit: Nov 23, 2006 15:01:36 GMT by Blown_Imp
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Nov 24, 2006 18:52:09 GMT
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I dunno about that one, don't want people thinking I'm strange now do i Today i stripped the turbo, apart from knacked bearings the compressor wheel has a chunk out of it so I'm going have tog get another one. (can i just use a differant wheel? or are they matched somehow?)
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Nov 25, 2006 12:18:56 GMT
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what ever happens you's have to get the rotating assembly re-balanced once a wheel is sourced. Ill have a scout around to see if i have one, if not I'm sure someone on turbominis can help you. Its strange that that piece is missing, i wonder what happened to it? J
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Nov 25, 2006 18:01:44 GMT
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Humm, yeh i feared it would need balancing, i have no idea who could do that tho! i suspect it might end up cheaper buying a whole new turbo. athough they make £100+ on ebay so maybe not! I suspect the engine has ingested soemthing at some point but thes no other damage to the housing and the shaft appears straight?! Ive started on the head today. Worked out I'm after 42.5cc volume for a 8.5:1 ratio. Pistons are 11cc Gasket 4cc so heads got to be 27.5cc Currently its 21.5cc so thats 6cc to gain. Started by using the seat catter to enlarge the area around the valves so the sides of the chamber are the same size as the head gasket (too about 1mm off which will make alot of differance to valve shrouding!) At the same time i made the chamber 1.5mm deeper. Next stage is roughly milling out the chamber shape
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Nov 25, 2006 18:40:00 GMT
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Looks like some kind of material defect to me on that comp wheel. If it had ingested something the wheel would be completely mullered. They do 'wear out' due to fatigue and I reckon that one is just at the end of its life.
If you get another wheel, be careful to get the right 'trim' - that is, you can have several different outer and inner machined blade diameters coming from the same casting, and these are matched to the comp housing machining also. So you could get another 'T2 comp wheel' and it may well have different diameters to your one (and ths not compatible with your comp housing). On top of that there are several different castings with different aerodynamic properties, but the information about which does what is not widely available except to OEM engineers when a new turbo application is discussed.
As for balancing, you could forget all about balancing it and it would be OK for a while, it might last 500 miles or 50,000 depending on the extent of the out-of-balance and the way you hammer it. For a DIY project theres not a lot you can do, i'd just assemble it carefully, use good engine oil and maybe even cross my fingers TBH. The only alternative is to buy a recon turbo 'core' and even some of those, the balancing is a bit hit and miss.
In the olden days (Saab 99 era) turbos used to be balanced by checking the g-level and then loosening the nose nut, giving it a tweak and checking it again, until an orientation was found that gave a decent balance. None of these little machining cuts to dynamically balance each shaft wheel and CHRA, it was just trial and error!!! Draw your own conclusions!
Normally the part number is printed on the rear of the wheel but if yours has been rebuilt before this may have been cleaned off.
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Last Edit: Nov 25, 2006 18:40:44 GMT by Mr_Bo11ox
1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT!
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Nov 26, 2006 16:58:02 GMT
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hows thart wheel widenig guide coming on slater a recon t3 turbo from minispeed is £250 by the way if it turns out cheaper to buy one
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Nov 26, 2006 18:34:37 GMT
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You missed it: retrorides.proboards86.com/index.cgi?board=general&action=display&thread=1163618604Milled out the chambers with a bull nose cutter. Did the 1st one then made a template of it and scribed it out on the others, Havent been able to check the volume cous i broke the bloody burette half way through!!!!!! Id take a guess that them bign about right tho. I calculated i will gain 3cc simply by sinking the valves! Next stage is putting the hard seat inserts in, pop the old guides out and get grinding!
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Nov 26, 2006 19:28:28 GMT
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Fantastic! I'm very impressed indeed, shame about the burette but then again if youve done one, and matched the others then it should be pretty damn close.
I'm going to get a 930 talbot head for my engine, its currently running an imp one so the compression is up at 10.5:1, the talbot head will drop it to 9:1. I can also get the heads for £40 brand new!
Any news on the turbo front?
J
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DutyFreeSaviour
Europe
Back For More heartbreak and disappointment.....
Posts: 2,944
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Nov 27, 2006 12:06:12 GMT
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There was a turbo rebuild feature in a couple of the oldies.... PPC and retro both did 'em. Apparently you'll need someone who can spin the assembly ( shaft, turbine etc.....) up to about 8000rpm. Then mark it so when you re-assemble it isn't all off again. Turbo specialists must be able to help on that score though and you can go home and bolt it up edit!!! - great work on the head by the way!
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Back from the dead..... kind of
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Nov 27, 2006 22:33:12 GMT
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B argain intercooler!
Does that plate spin round? I'm guessing thats why you were lightening it?
J
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Yeh its the clutch pressure plate. Should make a bit of differance i hope
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Nov 28, 2006 12:19:25 GMT
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You probably have slater, but have you balanced the pressure plate after modification?
I'm guessing you plan to match the inlet and exhaust ports to match the manifolds as well?
My first experience of doing this, I damaged 3 heads by breaking in to the water / oil jackets...whoops.
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Last Edit: Nov 28, 2006 12:23:21 GMT by iRocco
I like long walks, especially when they're taken by people I don't like.
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Nov 28, 2006 16:32:44 GMT
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Good work once again old chap.... go-on ...stick another pic of the metro up, all nice and dirty !
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Nov 28, 2006 22:01:06 GMT
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All the rotating parts get balanced at the same time. I don't do it myself i give it to a local tat hording genious to do it for me for 30squid! Basicly he will take the crank and balance that, then he puts the flywheel on and balances that then fits the clutch and does that and then the front pully ect ect, that way it all comes out perfect. Its bad practice to match the manifolds exactly, you want the inlet manifold slightly smaller then the port and the exhaust port slightly smaller then the mainfold. That helps prevent reversion which is when gasses try to go backwards through the engine. Not to mention its a damn sight easyer and saves alot of time.
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Nov 30, 2006 12:09:20 GMT
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that looks amazing, this is the exact car ive wanted to build for about 6 years! I'm glad someone has.
I always tried to get my mate to put his stupid fast series 1 rs turbo running gear into a beige mk3 escort shell but he didnt like the idea. That was about 12 years ago when sleepers wernt so popular.
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Nov 30, 2006 12:35:01 GMT
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This car is TEH SECS. FACT.
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Nov 30, 2006 18:27:44 GMT
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this metro is very much this and next year i think youll find monsieur
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2001 HONDA CT110 (NOT RCV)
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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1982 Metro HLS - Gone!slater
@slater
Club Retro Rides Member 78
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Fitted the exhaust seats now, been having a few issues with people sending me the wrong parts and then boring through into the waterjacket but its all sorted now so hopefully progress will speed up a bit!!!!!! I dicided to use MG sized inlet valves as i have a few spare so ive also taken a bit out of the inlet throat to allow for those.
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