aarrgghh flippin rendix !

[antoni]

well my car is disgustingly slow for a 2.0 and is crapola on fuel and we have been trying to figure out why for ages now and it seems I have the wrong rendix system fitted, its a 1986 360 2.0 8v on the solex carb and it has the 412 system fitted. the previous owner said it was fitted with a new one due to a starting problem.

Could this be why it runs so crappy?

Anyone know the correct one I need?

Ants

[volvodspec]

412A is for a B14 mate

for that year and engine you need a renix with the 414A code.

it will definatly be the reason why it's running weird as the characteristics of the ignition curve are way apart

[Ride_on]

Yes what that man said, see; http://www.volvo300mania.com/forum-uk/v ... f=6&t=3506

I have a few spare units (2 x 414s) if you want one.

[Ride_on]

The units I have are 414B (not sure which car maybe 89 B200K) and 414A (87 B200K 10:1), 6 digit part numbers are the same. Anyone know what the difference is? I also have a 406, maybe that came from the 85 B200K and might be more suitable.

Edit on octane rating - I see the 87 B200K recommendation is 95 RON unleaded. I remember alot of fuss about 360s needing high octane fuel, but looking at the manual and current unleaded spec it doesn't seem to be a problem. However I don't know the spec for the 86 car (renix/bendix 406?).

[volvodspec]

414B is like a slightly modified map of 414A, possibly to cope with 96RON in wich case it would run fine on modern RON95

the 406 is a rare renix unit!!; this was used for the first badge of B200K's at the introduction of the B200 after B19; but was very quickly dropped and turned into 407 wich had a speed limiter.
(same thing with the B200E; 405 wich was replaced with 408)
then as i sayd; after 86 B200K got a 414 mapping; B200EA/F/EE/EO got 411 mapping; due to changes in CR and various other slight modifications

my personal experience is that you can get any 300 renixed-engine to run on normal unleaded 95 (on some engines with a slight tweek to the C-plug of the renix), but if you fill it up with 98 you'll definatly notice a slightly better performance and economy (though 95 would still be fine for daily).

i do know that renix is a tough discussion since unfortunatly we know the mapcodes but that's about it, what i personally allways reccomend is that you keep the correct renix and carb with the engine; especcially on the B14 quite a lot changed over the years and i know firsthand what happens when you place a renix that belongs to a 1.7 on a 1.4 engine > 4meter high flames out of the carb, just as an example. the effect of wrong renix/carb can be less dramatical; but can still produce dangerous EGT and AFR ratio's that could eventually melt a piston or blow the engine.

[Ride_on]

The 414A is definitely fitted to my 1987 high compression B200K, so should be fine in the 1986 car. The 406 probably came from an 85 B200K and the 414B I think came from an low compression 89 B200K car. I think the 406 might have a slightly more advanced ignition and therefore more torque.

I don't see how performance would be better on 98ron without a knock sensor to allow the ignition to advance. Even then I didn't notice much on our 97 BMW 323i (cr=10:1, 2.5l, straight 6). I think the 406 might be better for torque, and therefore perhaps more sensitive on fuel/engine condition related pinking.

I'll send the 414A, tis what already agreed.

[Ride_on]

It makes you wonder why they moved to low compression. It really spoilt the cars IMO.

[Chris_C]

As around that time everyone was forcing in unleaded petrol, Volvo weren't making the GLE to be a sports hatch so it was never going to do well to put it as Super only.

Are you saying there is a high comp B200K as well? Might be interesting, I'd put a small wager on the B19 feeling so much better as it's on a Strom over the Solex as much as anything though.

[SteveP]

Are you saying there is a high comp B200K as well?

Course there is - the B200K was fitted to late Mk2 GLS's in 85

[Chris_C]

Ahhh... I didn't realise it was so obvious that the change in body shell meant instant change in compression... Is there such a bonnet clearance issue that all mk2 blocks had to have an epic skim

I knew there was a high comp B200e after the B19, didn't realise that the B200K was the same but I guess it makes sense for it to be.

[SteveP]

Alright smart arse

I was merely stating that since the B200K was fitted to such early cars (ie. even some Mk2's) it'd have to be high comp. High compression engines ran til about 1986... so early Mk3 360 GL's/GLE's would be B200K high compression Id've thought too Usually distinguished by a silver/chrome oil filler cap.

[Chris_C]

Ahh, that's the bit of info I didn't know and understand, ta This also means the GLS I bailed on 18months ago when I got Jet may have been unjust, I saw B200K and instantly ignored it

[Ride_on]

To my knowledge;
All 360s to 1986 - High compression 10:1 (B19+B200K+E)
87 GLE - High compression 10:1 (B200K)
87 GLT - Low compression 9.2:1 (B200E)
All other 360s low compression thereafter (B200K+E)

It is not signified by the oil cap (B19=chrome, B200=Black plastic)

My 87 + 88 owners manuals show some more engine reference letters.
87 B200KE + KS high compression (95ron)
87 B200EE low compression (92ron)
88 B200KO low compression (92ron)

The KE is listed in the 88 manuals aswell, although my not have been available in the UK. Certainly the 89 GLE I had was low compression.

So if we want to be really smart arse we need to start referring to the 6 letter engine reference.

..and many more variants, the low compression cars have the same peak power but much lower low end torque (or high reving peak torque). It made a massive difference to the driveability.

I've also just noticed the user manuals have the renix reference aswell (87+88 owners manuals anyway), but you would need the 6 letter engine reference to know which one is applicable. Not sure if this is on the cam belt cover, can't find mine.

And another thing - the B200KO uses an 87C thermostat, B200KE 92C, amazing what you find in the manual

[SteveP]

It is not signified by the oil cap (B19=chrome, B200=Black plastic)

Have to say I disagree with this.... not all B200's were fitted with a chrome oil filler cap and of the high comp B200's I've seen all of them had a chrome oil filler cap. I'd be surprised if all of these examples had the wrong cap by coincidence???

[Chris_C]

I've always wondered what all the differences the extra letter VADIS lets you have made, great post Ride On, thanks.