Just got hold of a 1.8 diesel mk4 fiesta, going to nick the crank out of it for me Xflow build. Just wondering what conrods im gonna need? the crank has a 82mm stroke iirc
Also what else will i be able to nick from it? Is it the 1800 or 1600 con rods that people use in pinto 2.1 engines?
Cheers
its the 1600 rods that are used in pintos
Hi Graham,
do you have some more detailed information to that conversion? What has to be machined on the crank and on the pistons? Are the rods plug&play or do you have to machine them, too? And what about the flywheel/clutch? Thanks in advance!
Regrads,
Dominik
Last edited by Dominik2; 02-08-2011 at 06:18.
Hi Graham,
And what rods are used in a crossflow (1600)
to do what?Originally Posted by fomoco_80
1600 crossflows use 1600 crossflow rods
Your biggest problem with the conversion is getting the timing sprocket and front pully to fit the crank.Also there is no keyway to align the sprocket for inital timing setup. The flywheel bolt pattern is different too.
I started this conversion many months ago on a XR2 engine,its still unfinished under the bench!! ,and i have all the engineering kit and knowhow to do it.
By the time you have paid someone to do all the engineering,you would be better off investing in a steel stroker crank.
.....And nearly a year later , did you try and go further with this ? it is do able BUT a couple of small one off bits to be made up and to keep cost down do a lot of the work your self , if crank is free your biggest outlay then is pistons , rods and flywheel , just like any other build up .
Hi Gents,
I'm digging out oooooold posts over here.
Did anyone ever experiment more regarding this thread?
Stroker and big bore kits for the Kent Crossflows are not very common here in South Africa, and they are very very expensive. In all the time that I've been playing with Escorts, I've only ever come across one person with a 84/84 crank & bore setup.
I managed to get my hands on a 1.8 Diesel engine, I will be robbing this for the crank, flywheel & starter motor. I'd like to see if I can stroke the crank from 82mm to 84mm by offset grinding the big ends.
For those that have actually completed this conversion, what piston/rod combo did you use?
by chance afriend read this and told me ,i have nt been on site for awhile , yes i have built something similar using 1.8 diesel mondeo crank ,rods and toyota pistons ,into xflow block but it was nt a pushrod engine anymore
Last edited by dt36; 16-05-2024 at 18:33.
yes ike crank would be the ultimate ,but i dont think the guy would go for it, its 2500 uk , so at exchange rate of 4 pence buys you a s african rand , its lots and lots of beer tokens , to spend on one part of the engine , and he is asking about the diesel crank option.
Thanks Madflow.
If you remember, do you mind sharing which Toyota pistons you used?
I originally wanted to try and go 84X84, or even 84X82 but apparently, there was someone here in SA that used the stock 82mm 1.8TD crank with an 87mm piston in an AX block (and it was reliable), so that has my head swinging that way now. I need to find a place this side that can X-ray the block for me.
I'm not looking at building a race engine, I want a nice torquey setup for a road car, +- 200Nm/150ft-lb is what I am hoping for.
I dropped the crank into the block the weekend and offered one of the 1.8TD rods up, to me it looks like there won't be enough meat left for a combustion chamber in the piston.
I still need to so some measurements and go hunting in the scrap yard for a suitable rod/piston combo if I don't come right on the internet.
I would love a kit from IKE but the cost of that landed is about 3500 pints of beer.
Last edited by warrenk85; 20-05-2024 at 07:45.
there was a guy from SA used to post on here on regular basis, i remember he was doing xflows with odd parts possibly toyota etc. maybe a search will turn up soimething on toyota ?
i used straight 6 ---i think---83mm turbo toyota piston ---had a small dish ---but this wont be of any use for your build ---- as i used an old 1600Gt head with the small 12cc combustion chamber in it as std----and my block deck was machined down to solve 2 issues ---badly corroded top surface ---hence it was a very cheap block as no use for 1600 xflow build ---and to suit my piston comp height to crank stroke and conrod length.
my old win7 laptop wont allow me to post up to long a piece it seems, so apologies for many small posts, my engine wasn t using pushrods and rockers so none of that mattered ---but this relates back to such one off builds ---each one is unique and has to be carefully worked out old school style ---pencil and paper ---draw up your perfect requirements in a sketch with measurements then start trawling through piston and conrod sizes
i would suggest dont try and go too big by offset grinding the crank for more and pushing your block out to far ---the machine work costs required for some parts of a build like this will mount up and extra work like offset grind crank and over bore a block can be risky ---plus lots more beer tokens---you ll be the bloke at the braai sipping water for the next few years --no ice. If you go 84mm bore and 82 crank --1800 cc of a strong engine possible ---keep a standard camshaft ---and think of forced induction ---that crank will take it .
This must be Craig from Cape Town - DarthVader.
I did not even think of him to be honest. He was good friends with my dad's late cousin.
Thanks for the reminder, I'll reach out to him.
I think the laptop I am using is going the same route as your one.
Let's try again, my previous post did not go through when I hit the post button.
The crank is still on the standard sizes on both the mains and big ends, I would like to keep it that way, So no 84mm stroke for me on this one. I'd like to go 84mm or 85mm on the bore, to give 1818cc or 1861cc.
I took a chance last night and put a standard 1.6 rod and piston in the block with the 82mm crank. The piston protrudes by about 1mm. I want to machine that piston down a bit and measure the cylinder CC to determine what the CR would be with the 1600 piston. I would be aiming for a CR of 10.5:1.
The biggest Kent pistons you find this side is 82.5mm, with 83.25 being very rare if not obsolete. This would be the lazy way out but then I can just do all of this in a 711M block.
But now with that being said, one thing that I would like to improve on is the piston/rod ratio. So still on the hunt to see what I can use.
I'll update as I go along.
problem with xflow rod and piston on diesel crank --the rod length ratio is to far out of wack ---too much side thrust on bore walls, you need a longer rod ,there is a long xflow rod on the market but it would be costly to import a set---but it would save a lot of machine and matching work costs--look for isuzu g180/200rods or datsun 510 1600 rods , with some machine work they could be matched up to bmw 84mm pistons
Thanks Madflow.
I'll definitely look into the L16 conrods. The Isuzu rods are hard to find this side. But enquired on both of them already.
On this side the Isuzu rod and Colt/Alfasud piston combination has been replaced with Toyota 4Y rods & 84mm BMW Pistons.
have you worked out the timing chain solution ? , so far no one has ever posted up their s , and which type 1.8 diesel are you using for the crank, is it an early version ?
I was actually looking at that the weekend.
I have an idea of what I want to do, but I need to get an engineering buddy out there to tell me if I'm smoking rocks or if my idea will work.
What I was thinking of, opening the ID of the sprocket up a bit, and machine a bit down on the crank nose for the sprocket to fit. Then machine the crank nose off in front of the cam gear, and have a new section turned that looks like the Kent crank nose and threaded to screw into the original thread of the crank which is under the no1 main journal, then drill and pin it in place below the cam chain sprocket.
The cam I want to use does not require a duplex chain kit, but I will leave enough space if I ever need to or would want to go that route.
The motor that donated the crank came out of a 1997 1.8TD Escort. I'm not sure when these 1.8 motors came out first.
It looks like they were in the Mk2 Mondeo too and then the 1.8TDCi from the Mk1 Focus looks to have had an updated version of the same motor but with some more environmental and smog attachments on it.
We also got a 1.8 naturally aspirated version with Endura DE on the tappet cover in the Bantam pickup. This is basically a facelifted Mk4 Fiesta with a load body.
There's a gent on one of the Kent XFlow Facebook groups that has just completed a 1800cc Kent using the 82mm crank on 1.6 XFlow rods and +0.060 pistons. I have asked him this morning if he would mind sharing some photos of what he has done with the nose of the crank.
might need to start another thread on here, could get long and not what the original post was on , lots of stuff to post up about .
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