GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: tosh on 27 April 2004, 20:46
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just purchased a solid g reg mk2 1.8 8v with a dead motor . have sourced a 2.0 8v motor not 100% sure that they fit .
any advice welcome . also looking for rollcage for same car
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how much have you got to spend on the engine mate?
i dont rate the 2 litre 8 valve, its pants! ;)
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A 2.0L will fit in no probs, will give a substantial improvement on the 1.8L lump.
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An extra 200cc (even with 8v) will be an improvement.
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From the conversation i had last night, the improvement may not be in the place you want it.
a 2ltre conversion will increase your power, but under normal circumstances, wont increase your acceleration. your benefit is top end.
it seems that because you are not changing the bore size, only the length of the travel of the piston; the pistol has further to travel. the increased volume size of the cylinder gives you the extra power, but the extra distance that each stroke now takes saps the engine of its ability to accelerate as quickly as an engine that has a short stroke.
so, a 1.8 8v will accelerate faster or at least hold it own on a 2litre, but the 2litre will take you to a higher speed and it will be stronger at accelerating at higher speeds.
But, you still wont catch a 16v on the 0-60, however, you may eventually reach its top speed.
Tin
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Not strictly true there mate.
A 2.0L will have lots more low down torque than a 1.8, so will be much better to drive.
If its has the same bore but longer stroke(which i doubt , probably larger bore and stroke) then the engine will produce even more torque.
The 2.0L will also produce a better top end.
Bigger is better :)
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hey, i dont disagree, i'm just saying that the performance may not be exactly what you'd expect.
i'm trying to figure out how you bore out a 1.8 block further than 1mm oversize as there is a load of oil bits at the bottom of the block you will interfere with. apparently.
Tin
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also, i'm rather assuming that the 2litre block and 1.8block are identical, as everyone talks about putting a "2litre bottom end" on the 1.8 block to get 2 litres.
that to me sounds like the bottom bit of the sump and casing and all the bits that attached your main crankshaft, and big end bearings. therefore the 2litre is acheived by a longer stroke and not bigger bore.
again, this isn't my expertise. i only understand a fraction of what my 16v went through on its engine rebuild.
tin
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correct me if i'm wrong but isn't the dubs 1.8 a bored out 1.6. if so, surly a 2.0 is just a longer stroke, any more boring would break it! ::)
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i thought i read that somewhere as well.
casting my mind back a few years, the 16v brigade were always upset VW didnt put the 2litre 16v block in the late mk2 16vs. having said that, no-one could really understand why the 2litre 16v Corrado didn't perform much better than the 1.8 16v unit, and was certainly no quicker than the Mk2 1.8 16v GTI.
which rather adds to my theory that 2litre conversion doesnt give you the monster you are looking for in terms of acceleration, but does give top end.
also, my engine (ahem) is rebored out to its maximum (so the reboring people told me), which i am told is 82mm (1mm oversize). there is no VW part for a 1mm oversize. only .25mm and .5mm. the piston head are made specially (arm and leg time) by another German company.
i'll try and find the displacement figures for the 2litres tomorrow.
Tin
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tinman,
have a word with steve at c and r, he has got a mk216valve that he has bored out to 2.2litres.
which is the very maximum that ther 1.8 engine can go to, however that particular engine kicks out 197bhp, which is pretty unbelievable.
tinman, i thought ur 16v was unmodified? ;)
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Whooooaaaa there!!!
You have all got these ideas about a 2.0ltr conversion but havent got any body with a 2.0ltr conversion to comment.
"Enter stage left" ME ;D
I have a PB code digifant engined 8 valve that i have put a 2.0ltr in to.
The bottom end is a "tall block" code AGG as fitted in mk3 golfs and passats. This is 16mm taller than the PB block so things get a little close to the bonnet but it still fits. I have used the origanal PB head and have put a Kent cam in it, vernier pully and a reprogramable chip in the ecu. This was all set up on the rolling road and now pushes out 150 bhp. I beleive this is this the best way to get the most from a "tall block" conversion as the increasd stroke will sap a little acceleration because the engine has to rev harder but the longer stroke does giver greater torque in all of the rev range. So i would do the conversion but use all the trick bits that i have on mine and you wont regret the punchy acceleration it gives you.
Take a look at the TSR web site or C & R. they have 2.0ltr engines but use a combination of boreing and stroke to increase cappacity.
If you need any help you know where the forum is.
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r u from notts mate?
how much for that conversion?
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nah I is based in the Lincoln area.... aiyh ;D
The conversion totaled about ?1000 cos i did all but the rolling road work my self.
Two good things come of that: 1. the price is kept down. 2. I now know my engine inside out so any problems are easy to sort. ;)
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The reason the 2.0 16v in corrado/passat isn't quicker than the 1.8 16v in the golf is because the emissions equipment ie. cat and the poor inlet cam that goes with it.
Another question to answer,
isn't the 1.8 a bored out 1.6?
No, there is only one block, the crank and pistons are different on the 1.6 and 1.8, the block is the same, so all that is changed is the stroke. If you look at any 1.6 carb engined block it will have 1.8 stamped on it, that is why.
As far as i know the 9A block (2.0 16v) is bored as well as stroked over the KR (1.8 16v).
I will look it all up when i get the chance! :D
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Also, its apparently easy to use the audi 2.0L 8v block in the golf, it is not a tall block so should fit no probs :)
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hmmmmm, how much can you get one of those engines for vr6?
do you know what the power out put on one is? ;)
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Get an Audi block from a breakers.
Apparently they are good for 150bhp....
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hmmmmmmm thats interesting! :D
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no replacement for displacement.........or sumink like that
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From what I've read the conversion to the existing 1.8 block is normally either to 1.9L or 2.0L, firstly the standard bore is increased from 81mm to 82.5/83mm, and then to get to 2L you need a new crank for a longer stroke. I'm guessing now but generally if you choose to use a different bottom end the majority of advice seems to point to 2L short blocks i.e. Audi 3a, early mk3 2e, which I assume has both an increase bore and stroke and also has no clearance issues when fitting into the Mk2.
This is a conversion I'm thinking about having done later on, however it's costly as to get any decent power gains on the 8v you'll need a fair bit of head work in order for it to breathe properly...
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You will get a very good increase without head work, obviously head work would be better!
There is no substitute for cc ;)
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mmmn so now we've gone from an 1.8gti 8valves 2 a 2L LOOOOOL :D this is never gonna end :D :D
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you got your golf yet mate?
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na not yet mate, :-\ oh well :)