Amazing!
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Amazing!
Following the fitting of the solid lifters, I was out again for a weekend of racing.
Unfortunately, all was still not well with the engine, power was way down on what it should be, so this week it has once again been delivered to, and now stripped down at BTEC Racing.
The news is not good.........
Cylinders 1 to 3 have between 70 and 75% leakage, and the best one, Number 4 has 35% leakage.
I'm told the acceptable figures would be about 25%.
One of the pistons shows signs of damage. Two of the spark plugs have been clipped by the pistons, suggesting that the strain of 8,000 rpm is too much for the bottom end (maybe a bit of whip from the crankshaft?).
So I am looking at a minimum of the bores being honed, and 4 new pistons.
But of course whilst it's in pieces anyway, it would make sense to fit some forged pistons, and if you're going to do that, then better con rods would be nice, plus a steel crank and maybe a different cam.
And I could pursue one of my other plans, which is to use a 16v head.
Of course it all depends on money, and as I have a miniscule budget left for it this season, all my ideas are largely irrelevant.
None of this is a great surprise really, the engine was getting old (over 10 years of competition work), and forcing a lot of boost through standard components was only ever going to go one way.
So the bottom line is it really needs a new engine building, if it goes back together with standard components I can't see it surviving long. The problem of course is funding it! And justifying the funding is even harder.
Following the fitting of the solid lifters, I was out again for a weekend of racing.
Unfortunately, all was still not well with the engine, power was way down on what it should be, so this week it has once again been delivered to, and now stripped down at BTEC Racing.
The news is not good.........
Cylinders 1 to 3 have between 70 and 75% leakage, and the best one, Number 4 has 35% leakage.
I'm told the acceptable figures would be about 25%.
One of the pistons shows signs of damage. Two of the spark plugs have been clipped by the pistons, suggesting that the strain of 8,000 rpm is too much for the bottom end (maybe a bit of whip from the crankshaft?).
So I am looking at a minimum of the bores being honed, and 4 new pistons.
But of course whilst it's in pieces anyway, it would make sense to fit some forged pistons, and if you're going to do that, then better con rods would be nice, plus a steel crank and maybe a different cam.
And I could pursue one of my other plans, which is to use a 16v head.
Of course it all depends on money, and as I have a miniscule budget left for it this season, all my ideas are largely irrelevant.
None of this is a great surprise really, the engine was getting old (over 10 years of competition work), and forcing a lot of boost through standard components was only ever going to go one way.
So the bottom line is it really needs a new engine building, if it goes back together with standard components I can't see it surviving long. The problem of course is funding it! And justifying the funding is even harder.
it sounds like that upgrade was a step too far on the old bottom end.
the trouble with the 12st bottom end is that there isn't much available from later models to use, as in newer cranks/rods etc...
maybe its time to brush up on your portugese & go on brazilian eBay for a 1.0 ohc 4pot....
A 1.0 ohc ? What were they fitted in ?
brazilian spec corsa b & c, 8v. it runs 12:1 cr on corn alcohol.....70 odd hp & revs like hell......
Sounds awesome. So in standard form its spi? Same head as 12st?Quote:
Originally Posted by mowgli
That is certainly an option Mike, and you beat me to it as I was going to contact you about it.Quote:
Originally Posted by mowgli
Where was it you found out about this engine/car combination? A specific website/magazine? Or was it just General Knowledge for you?
I need to do some more research on it.
BTEC Racing were keen to build me a 3 cylinder Corsa motor, but I don't thing there's a way I can get away with that under our Regulations;
12.6.1. The engine block must be externally identifiable as that fitted to the original model or specified option.......
Thinking out loud, the other option is to abandon the turbocharger, and stick a N/A 1400cc 16v engine in there.
But that doesn't really appeal to me, a lot of the fun of this car is it being a tiny capacity turbo.
Plus a high spec. baby XE will cost an arm and a leg, and even the best of the best is maybe 210bhp tops.
see below
i was looking at corsa variants on the web one night & then found a youtube link to a turbo 1.0 4cyl corsa in brazil, then sort of went to look for that, as i didn't think they still did a 4cyl 1.0...Quote:
Originally Posted by novarally
and i found this
mpi, basically a mini c16se i think..... but if you ran it on european grade super u/l it would be crazy...Quote:
Originally Posted by db_1.2
here is some more tantalising info from our friends at wiki...link for full page
GM do Brasil
GM do Brasil specializes on SOHC, petrol-powered and FlexPower (powered with ethanol and/or petrol, mixed in any percentage) engines.
GM Brasil also made 16-valve versions of the 1.0, 1.6 and 1.8-liter engines.
- X10YFH - 1.0 L SOHC FlexPower - Chevrolet Celta, Chevrolet Corsa C and Chevrolet Classic (Corsa B sedan 4 doors).
- X14YFH - 1.4 L SOHC FlexPower - Chevrolet Prisma, Chevrolet Corsa C and Chevrolet Meriva.
- X18XE - 1.8 L SOHC FlexPower - Chevrolet Corsa, Chevrolet Montana, and Chevrolet Meriva; Fiat Palio, Fiat Siena, Fiat Palio Weekend, Fiat Strada, Fiat Idea, Fiat Punto and Fiat Stilo.
Thats gutting Colin, but the idea of it been 1L turbo at that level is half the appeal and excitement about the car.
Any pics of those engines mowgli ?
Interesting stuff tbh
look at the youtube linky, there's plenty of other portugese vids about these turbo corsas
http://images.ookaboo.com/photo/m/Br..._10_2008_m.jpg
http://images.ookaboo.com/photo/m/Ta..._10_2008_m.jpg
Thanks Mike.Quote:
Originally Posted by mowgli
Looks like I may have to register on AllCorsa.co.uk and do some checking. I did just find a post from someone on there who's in Brazil and has one of these Corsas.
The main issue is going to be whether the block is externally identical to a 1200/1300/1600
http://produto.mercadolivre.com.br/M...m-original-_JM looks interesting off brazils version of ebay
That this is possible in 1.0?:eek:Quote:
Originally Posted by novarally
it is possible with machined valve cutouts in the blockQuote:
Originally Posted by zeifer33
Great work on the info Mowgli, I tried to rep you, but couldn't.
From the photos it certainly is a close look a like for the late astra g 1.6 8v,s which in turn were nigh on the c/e16 se.
They are similar bore as the 1.4 16v X14XE's, Slightly smaller as a brazilian asked for some so he could reborn his 1.0 8v.
Youtube search for 1.0 corsa turbo will bring up a good few videos.
OK, a plea for help.
Has anyone got English-speaking friends or relatives in Brazil?
I need to get hold of more information about these X10YFH series 1.0 OHC engines, in particular whether the engine block is of the same external design as a Nova.
Assuming I can get hold of that information, and it is the same, then I want to buy an engine and get it shipped here.
I've drawn a blank on trying to find a breaker or an EBAY seller in Brazil, so someone living there seems to be my best chance of success.
Any help welcome, and any results can be rewarded in Nova parts............thanks.
as i am guilty of sending you on this course.. i feel duty bound to try & help you. i know a bloke who is married to a portugese woman, and he is pretty much fluent too, i'll go & investigate any connections they might have.
i'd imagine there are few portugese speakers in your part of the world, wherever there is vegetable picking, there are portugese people
Thanks Mike, any help much appreciated.Quote:
Originally Posted by mowgli
Round here the fields seem to be mostly filled by the Polish, and their cans of lager. I'll do some enquiring though, and see if there are any Portugese around. Someone actually in Brazil would be a bonus though!
Admin Lee's dad lives over in Brazil, not sure if he's fluent or there's large English speaking areas but might be worth a PM?
good memory.... paint the engine grey & make out its a suitcase.... then lee can bring it home for nowt
We actually have a job in at work atm which is on a deadline as the guy is taking 2 Manta CIH blocks back with him to the states, I can try and ask how exactly he's doing it.Quote:
Originally Posted by mowgli
Do we mean Lee with the blue Vito?Quote:
Originally Posted by MK999
That be him!Quote:
Originally Posted by novarally
Might be worth a ask in a vauxhall dealer to see the price/avalibilty and to compare to when you get a total price for one shipped over ???
Or someone that has a worldwide copy of EPC will be able to see if the blocks are the same :)
My copy only does vauxhall and Opel I think, but will check later
It's a good point Edd, thanks. I'm on friendly terms with the local main dealer Parts people, so I will nip in there and make the enquiry.Quote:
Originally Posted by Edd
I suppose there's also a chance that they might have access to a database with detailed photos of the block (EDIT ; which is precisely what you then went on to say in your second post!!).
Exciting times :)
Expensive timesQuote:
Originally Posted by BRoadGhost
Cracking Car! Have you considered a carbon fibre gear shift similar to the WRC focus's carbon fibre handbrake. May save half a kilo at a guess although price/weight savings probably not worth it.
http://i298.photobucket.com/albums/m...24at164443.png
Bit of a long shot but this engine was not used in any of the "other marques" carrying gm engines eg daewoo, fiat etc? Might be a way of finding one in europe then.
nope it is brazil only.. they use corn ethanol. thats why its 12:1 cr.
12:1 turbo sounds tasty, chuck some petrol in it anyway lolQuote:
Originally Posted by mowgli
It's a good suggestion, I'd buy one if someone can make it at a sensible price. The aluminium one is actually quite heavy.Quote:
Originally Posted by OllieKing