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Post by cul8r on Jan 29, 2007 13:37:58 GMT 12
(Copied from Oldschool, Posted here, thanks Methodz)
Hey guys
I have just aquired a Vauxhall Chevette Hatch , and I intend on Using it for Rallycross/Autocross/Gymkhana...
Most likely going to put the 1256cc & gearbox back in..
Anyway I have a few questions Im sure some of you will know the answers too..
I'd quite like to Put Either Isuzu Piazza or Holden Gemini front brakes at least on it... (Vented rotors as opposed to solid) - Is there anything major involved in that? As I have never done it before
Also how hard is it to transplant the Gemini 1600 engine and possibly gearbox into the Chevette? As Im pretty sure I can get mates Complete Gemini Wagon Derby car ... (Gemini & Chevette Wagons share floorpans? thus the question...) And whats involved. I dont mind at all if you go into graphic detail...
Cheers,Chris
Anyhelp would be greatly appreciated...
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Post by burntrubber on Jan 29, 2007 20:23:57 GMT 12
Pretty sure the brakes go straight on you have to use the Piazza tierod end aswell because the taper on the shank is differant. With the engine its much the same as most engine conversions not sure on exact details but one of the Chevette boys on here will know.
I have an injected Piazza engine in my Gemini which was a piece of cake to setup less than a day to have running.
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Post by gordo on Jan 29, 2007 21:40:41 GMT 12
(Copied from Oldschool, Posted here, thanks Methodz)Hey guys I have just aquired a Vauxhall Chevette Hatch , and I intend on Using it for Rallycross/Autocross/Gymkhana... Most likely going to put the 1256cc & gearbox back in.. Anyway I have a few questions Im sure some of you will know the answers too.. I'd quite like to Put Either Isuzu Piazza or Holden Gemini front brakes at least on it... (Vented rotors as opposed to solid) - Is there anything major involved in that? As I have never done it before Also how hard is it to transplant the Gemini 1600 engine and possibly gearbox into the Chevette? As Im pretty sure I can get mates Complete Gemini Wagon Derby car ... (Gemini & Chevette Wagons share floorpans? thus the question...) And whats involved. I dont mind at all if you go into graphic detail... Cheers,Chris Anyhelp would be greatly appreciated... In my opinion, you won't need them. I used to do a lot of club events, such as you're interested in, with a stock and - later modified - 1256 and a set of matallic pads is all you'll need on the front. I've had the disks up to red hot - seriously, FAST drive down the south side of the Rimutakas  - and they were still working without a problem - other than a small fire from the built up crap. The rears were a different story, though - you may be able to get a better material for the shoes but, to be honest, I really don't think you'll need them for what you're going to be doing. Besides, it's money that may be better spent elsewhere, isn't it? As a start, leave the suspension standard except for decent shocks and set the front camber to the more negative position and see how you get on with it. depending on the club rules, a set of 155 rally tyres for the dirt events and some good road rubber for the seal events may be a good move - second hand stuff'll do as you learn. Depending on the events, you may wish to look at low profile tyres to effectively lower the gearing but this may depend on the cornering speeds. If you're using a stock engine, don't bother taking it much over 6k-6k2 as the power falls off quite quickly although I have seen over 7k4 on the modified engine when I wanted to avoid a gear change. For circuit stuff, I used 40PSI, for motokhanas I used 32PSI for seal with around 24 for gravel and grass, hill climbs on seal I used 32-40PSI and for gravel 24-28PSI. Experiment a bit to see what suits you. |
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Post by cul8r on Jan 30, 2007 8:05:48 GMT 12
Thanks alot for your help Gordo.
Cheers,Chris
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Post by mikuni on Jan 30, 2007 8:47:11 GMT 12
Yeah I would tend to agree with that. The brakes in the chevettes are great. Even standard ones tend to pull up the car pretty well. I am using Piazza's in mine and they are VERY good. I would actually recommend using them just because they are so much fun. I have semi-metallic pads aswell. The still cook though. Over the holidays I was thrashing my car on some windies and after about 25 minutes I had pretty much no brakes at all. I'm guessing it must have been the brake fluid or something like that??? I can't imagine that vented brakes would have faded to that level?
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Post by cul8r on Jan 30, 2007 10:38:14 GMT 12
Awesome so Standard is the go, works best for me too, Doing it all on the cheap   It shouldnt be that slow on the AutoCross etc , they only weigh 6/700kgs, and the last one had a fair bit of poke. Might still buy the Gemini Engine and get the Piazza brakes for when I feel the need for more power ;D Also Any of you guys be interisted in the Piazza engine, 2.0 Single Cam... Cheers,Chris |
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Post by mikuni on Jan 30, 2007 11:27:41 GMT 12
If I were looking for a cheap easy high horsepower car I would look at the following. Buying zeps cam when he's selling it, putting it into a worked 1600 head and using that on a standard G200Z block. Run bike carbs, rejetted and using 98 octane with a relatively high C/R. Would be quite a rev happy engine, bolts straight in and shouldn't give you hassles with reliabilty. Bike carbs are good because they are cheap and compact. You won't have to worry about interferance with the brake master cyl if you use them. After installing that engine I would get the master resleaved and run piazza brakes with metallic pads and braided lines. Not sure on diff, it really depends on what you want. You could try using the standard diff but it really doesn't handle much power. Upgrading to a piazza is an option but I have heard the rear brakes give trouble because of the floating caliper design and I hate torque tubes, so changing to hilux or borgwarner possibly. It will cost you a couple grand and not look like much but the end product will be a weapon and it will be achieved using older technology  |
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Post by cul8r on Jan 30, 2007 11:46:02 GMT 12
ROFLs, Im talking whole car will owe less than 1 Grand once done  Can get the Piazza or Gemini both for under $100 I'd think (bodies are shagged).. Cheers,Chris |
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Post by mikuni on Jan 30, 2007 11:58:26 GMT 12
haha, sweet then just jam the gemi head on the pizza block then stick pizza brakes and diff into chevette and run cut gemini springs with decent shorter shocks all round. maybe a bigger carb if you can be bothered mucking round with intake man. otherwise done!
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Post by cul8r on Jan 30, 2007 12:18:05 GMT 12
Does the 1600 head bolt straight onto the 2.0 SOHC?
Whats the real advantage from doing that (Compression Ratio), or does it change the CC??
Cheers,Chris
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Post by mikuni on Jan 30, 2007 12:37:33 GMT 12
It bolts straight on from what I know. I don't know much about the G seires motors, but some people go hard out changing rods and cranks and all that and using 1800 blocks to get better stroke blah blah. But yeah, G161 on G200 raises the comp. Possibly different port sizing but probably not.
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Post by 77vette on Jan 30, 2007 17:12:06 GMT 12
I think they weigh 800kg. Sedan is 840kg i think.
Yeah i say grab the gemini and piazza and you'll have nutsloads of bolt in upgrades. Lock the chevette diff and it will probably handle the piazza engine, especially on the grass. Or just wack in the piazza one and get rear disks aswell. They only thing your gona have to pay for is a customised driveshaft!
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Post by cul8r on Jan 30, 2007 19:03:52 GMT 12
What, so the Piazza Diff will bolt up without any problem??
If so that'll be mint as..
Could kill a few birds with one stone.... Diff Upgrade, 1600 Head onto 2.0 , 1600 Rods for Zep (I think he wants some) Brake upgrade...
Cheers,Chris
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Post by burntrubber on Jan 31, 2007 0:02:14 GMT 12
Piazza diff is wider buy about 50mm 25 each side could still fit with the right wheels and some flaring. The 1.6L head onto a 2.0L block it fits straight on but the water galleries dont quite line up so I've read it can be done though. I have a 1.6L and 2.0L head and if you look closely you can see they are differant.
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Post by zep on Jan 31, 2007 7:37:52 GMT 12
Heaps of people have fitted the 1.6 head to the 2.0 block. They galleries are a bit off, but I don't think it makes a huge difference - you may even be able to get around that with a bit of help from a grinder.
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- and they were still working without a problem - other than a small fire from the built up crap. The rears were a different story, though - you may be able to get a better material for the shoes but, to be honest, I really don't think you'll need them for what you're going to be doing.
