AdrianH
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| posted on 10/2/09 at 07:39 PM |
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Techy question 1.6 CVH manfold to 1.8 CVH?
Several tech style questions really
I am just wondering if the inlet manifold and carbs from an XR3 (not injection) would go on to a 1.8 CVH head.
I am not after power gain but a little less of what is around with all the inlet cooling pipes and sensors etc.
I have a standard set up with a 1991 1.8 CVH and a Pierburg 2V carb. The manifold is big and I am wondering if I can gain more space and lower height
a little bit with a swap.
What I could do with is some form of access to a site listing all the inlet and exhaust gaskets with pictures, I could then overlay and see what
differences there are. And never having been into the modifying stage I have never done this type of thing before.
Can anyone suggest a site giving this style of information. If a proper shop mechanic perhaps I would access lists of equivalents on factors part
numbers, I have seen the old books listing all the models and which part fits.
Lastly there is on the bay of E a 1.8 CVH bottom end with the XR3 head, inlet and carbs, so I know the whole head will fit and run, so I could always
swap heads and then run with an Edis and Megajolt system, but what advantages does it offer?
Sorry for the long post.
Adrian
Why do I have to make the tools to finish the job? More time then money.
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theconrodkid
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| posted on 10/2/09 at 08:22 PM |
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the pistons are different,from memory there are 2 types on 1600 cvh,dont know if one is the same as 1800 and i think inlet ports are a different shape
and an extra water way on 1800 so not that straight forward
who cares who wins
pass the pork pies
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wrigglypig
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| posted on 10/2/09 at 08:51 PM |
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Have a look at my photos I have the same engine and fitted it with bike carbs gsx750s and made my own mainfold out of steel, I got the manifold plate
lazer cut out of 5 mm steel cost me £15 quid I have the cad file somewhere if I can mail it to you you should be able to get one cut. I know Blackburn
is a longway from me but if you have the head off and can get here we can make a manifold in the day easy. I fired mine up last week just on the edis
you can see the clip on you tube. www.youtube.com/watch?v=NcVMVosgZ5w
Kev
Ps I have all the old manifold and carb from my 1.8 if you want it as a spare?
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AdrianH
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| posted on 10/2/09 at 09:22 PM |
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Hi Kev;
I have seen your Youtube with the page turning machine and it is probably what pushed me into making sure my engine ran.
You see, I am just not sure which way to go yet,! I am after a basic build as possible with as many things as original as I can for the IVA test.
Also trying to watch the cash spent on the project. I have still to get Scuttle and Nose cone delivered to see what height I have to work with and do
not want to have to cut holes in the yet to make bonnet.
So I spend time looking at what if's and trying to second guess everything.
The cheapest thing for me as the ESC Hybrid works is to leave as it is, but it requires all the associated bits plugged in.
The engine mentioned on ebay is £75 all in, but that needs Edis and megajolt of which I would also have to buy.
Going for bike carbs also requires a fabricated inlet manifold, buy the carbs, edis and megajolt.
I need a fountain of knowledge so I can make informed decisions. So I post lots of sometimes dumb questions and hope the answers can be found.
I have just had a thought that I may go into a motor factors and see what old parts books I can scrounge, but I get the impression they are all PC
programmes now.
Thanks for the offer of the inlet manifold I may ask you to send me the cad file. Have you done one for the exhaust yet? I am trying to cut and weld
the two into one pipe to get it to exit the side of my chassis but I am wondering about a thick plate being cut and doing an exhaust.
I was considering taking an exhaust gasket to a laser cutters to see if they could scan the shape and replicate.
Adrian
Why do I have to make the tools to finish the job? More time then money.
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wrigglypig
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| posted on 10/2/09 at 10:49 PM |
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Hi Adrian,
No I hav nt done the exhaust yet I found that I needed to have the inlet gasket drawn up in 3d cad ( my next door neighbour is a whiz on it and does
it all day in his job) Dont know what else to suggest really, but the questions are nt stupid thats how we learn, if you can get the manifold picked
up its complete, then its yours. Good luck? Kev keep me updated
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AdrianH
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| posted on 10/2/09 at 11:13 PM |
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Kev U2U sent
Why do I have to make the tools to finish the job? More time then money.
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yellow melos
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| posted on 11/2/09 at 07:58 AM |
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i am pretty sure the spacing on the inlet holes are the same for 1.6 and 1.8, i know the exhaust are as i had a manifold from an 1.8 on 1.6.
i am pretty sure that the head it's self are the same... difference in stroke from 1.6 to the 1.8 and the crank and oil pump.
one of the tuning guides i have says to use a 1.6 head on a 1.8 block
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AdrianH
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| posted on 11/2/09 at 06:40 PM |
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I have done a bit more digging and one difference seems to be waterways!
On the 1.6 litre head there seems to be a waterway between the middle two inlet ports and that is where a sensors is fitted to monitor temp.
On the 1.8 CVH the waterway is at the flywheel end on the head goes through the inlet manifold and the water comes out of it at the thermostat housing
which is part of the manifold.
The inlet ports look to be the same size and position between the two sizes and the exhaust ports all use the same gasket.
I just have to figure what to do with the thermostat and waterway as I would end up completely blocking it off.
Adrian
[Edited on 11-2-09 by AdrianH]
Why do I have to make the tools to finish the job? More time then money.
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