1.7 to B20 conversion parts list

[monka]

i have looked around the forum, and although i have found lots of 'just change a few parts over' answers, when my car is a daily driver and when i manage to do the swap ideally needs to take place in as short a time as possible, i thought i would start this thread up, as it would help other members on here as well.


so i have a 340 1.7, and will be putting the b20 lump from a 440, but what year/chassis 440 do i need to get the b20 lump from, does it matter if it starts off as an injection one from a later 440?

if i was to go and find a bare block, what would i need, and from what cars, so that it is a direct fit so i can simply take out old engine, fit new one.

manifolds,
from what i have seen, both the original intake and exhaust manifolds are used?

fuel
a 1.7 fuel pump, plus the carb from the 1.7?

ignition
what dizzy cap, ignition leads, and renix units are used?

cams
i know keep the original ones, but will a better one from anyother engine help?

drivetrain transfer
flywheel and clutch, from a 1.7 or 2.0, or doesnt matter?

engine mounts and sump
i have read you need the sump from the 1.7?



and any other things that i have missed, such as sensors etc that need to be swapped?


also, as i intend on doing something special, what are people's thoughts on the following before the engine goes in

port and polish the head and manifolds?
skim the head
lighten the flywheel
different camshaft (what from though)

and eventually, bike carbs on a custom inlet.



cheers for any input and advice to this thread in advance guys, just i have had a habbit in the past of taking cars apart then realising i need to order parts etc.lol

[Chris_C]

Most of the above can be answered with "depends"

The 2.0 will be nothing like it should be on a 1.7 carb. The jettings will be wrong for the cc and the cam. It'll likely run, but not well. Thing is, the 2.0 b20 never came with a carb, so your best option is to take it to a carb genius to have tuned. I can think of one of those in the UK, though there maybe another 2 or 3 hiding. That however negates cheapness.

Thing is, if you convert to FI, it's a bit more work. About... say, 2 hours more. What is your reasoning for wanting the carb? I've a horrible feeling I know already, and that it's something that I'll likely not agree with

Renix, depends what cam you put in. Depending on how much you change, non of them. If you run a stock B20 with stock FI and ECU, then the B20 renix is perfectly matched. Again, having your sparks in the right place is pretty essential if you actually want to make more power than the orig 1.7, bodging it is pointless as you'll likely loose all the power you are trying to make.

Bottom end is the same as for the valver conversions, and is listed in a fair few threads on here, and it's late so I won't repeat that.

Basically, if you want this to be a daily, and a reliable one, I'd suggest a rethink on what you are doing. The B20 is rated at about 30% more power than the B172k, it'd be very easy to loose that without doing a proper job.

[340GLT]

I have a complete B20 engine from my mums 440 if you are interested? I also have complete loom and ECU if you wanted to fit the fuel injection system. Very strong engine, removed from car as car was rotten and got scrapped.
Adam

[monka]

chris,

luckily, there is a carb tuner right here in our very own southampton, havent been there but i called them up with my last car, they are just under itchen bridge i beleive,


340glt

how much ya want? what mileage on the engine



so i can just put a carb on the 440 engine? and if i do, can i put the b20 renix on? or would it have to stay with the b172? or is there any other renix i can use if i want to put carbs on the b20, from a 360 or something?

[Chris_C]

If you are in Soton, ignore the bloke by the Itchen For no reason other than you live within *very* easy driving distance of the previously mentioned genius

http://aireytuning.com/

B20 Renix, as to what carb I'd talk to Tom, and go with one that he's happy to fiddle with. A lot of friends of mine have had cars setup there, but as ever read some reviews... I can't imagine there's a bad one out there

[340GLT]

Engine done 110k, Everything there. Loom ECU etc £120
Adam

[volvosneverdie]

Engine done 110k, Everything there. Loom ECU etc £120
Adam

Mr T says:

I pitty the fool who pass up an engine like that at such a low low price, Sucka!!!

[monka]

What is your reasoning for wanting the carb? I've a horrible feeling I know already, and that it's something that I'll likely not agree with

can i ask what the horrible feeling is? lol.

and no i'm the sort to rev the engine and flick the ignition on and off if that is what your thinking. lol


na the main reason is

i have been a mechanic since school, 2004. and have never even worked on a carbed motor, and although being into cars, have never done an engine swap.
so while i brought my 340 as a runaround, that i was just going to get rid of in the spring or when i find the car i want. i see my self having it for a while. lol. also it is something to challange my self with.



and i'd pity the fool who didnt buy that engine as well, although, its that time of year again isnt it, (christmas) lol

if ya still got it in the new year mate i'll take it

[Chris_C]

Fair play... there's been several who like that engine for the fact it is externally identical to a 1.7, and if you take all the bits that re physically the same shape, then certain people who like to inspect things would have difficulty in noting that it's different. Thats what I don't agree with.

You say you are in Soton, want to meet up for a beer at some point? Theres a few of us with 300's here. (he says as he's out of Soton for a fortnight)

[classicswede]

For teh simple conversion this is what you need,

complete 2 ltr engine,
sump gasget or in a tube type,
spigot bearing
electric fuelpump,

Keep the 1.7 renix - you cant use the 2ltr one anyway

Carb wise you will get away with the 1.7 carb but dont expect it to work any better than it does on a 1.7 best to try and get a webber conversion or mabe swap to bike carbs but then you would loose the stock look.

Fuel pump you will have to convert to electric pump for carbs

[monka]

does the mechanicall pump not fit on the b20 then?

and as if i do go electronic, wont i need to sort out some sort of fuel pressure regulater?


and the best way to convert to electronic? just buy a universal inline pump?

[kaos]

Why cant you use the 2ltr renix Dai?

or is it to do with swaping to carbs? but it'll work as normal on injection?

[monka]

as kaos said, lol

[340GLT]

The 2ltr renix doesnt have a vacuum takeoff like the 1.7 one and the flywheel sensor doesnt plug directly into it. The ECU that fuels the car also retards/advances the ignition maps.
Best bet would be run it on fuel injection. For a bolt in inlet manifold you want it from a 1.7 Multipoint injection from a 400 series or some early renaults as it put s the throttle body in the middle on the pass side instead of into the heater box.
Adam