Club323F
http://www.club323f.com/forum/

BP22 intake camshaft on 1.8l DOHC engine
http://www.club323f.com/forum/viewtopic.php?f=54&t=21477		 Page 1 of 1
Author:  TheMAN [ Sat Oct 13, 2007 7:42 pm ]
Post subject:  BP22 intake camshaft on 1.8l DOHC engine
I was checking the parts catalogue and found out there's a different camshaft for the leaded fuel BP-ZE motor... anyone know any specs on this? It should be listed in the service manual if any of you guys have it. I'm going to have to assume that it has a more aggressive profile at the moment as that is typically the case for many Japanese engines in Europe. I know this for a fact with the FE3 motor and the Nissan CA16DE.
Author:  Neil F [ Sat Oct 13, 2007 7:49 pm ]
Post subject: 
All our BP engines were un-leaded mate.
I think the BP22 cam was fitted in our 140bhp 1.8GT 323 before 1991.
Author:  maylander739 [ Sat Oct 13, 2007 7:56 pm ]
Post subject: 
yep, it was on the pre cat version of the gt engine, do a search and you'll find a load of info on it
Author:  TheMAN [ Sat Oct 13, 2007 8:38 pm ]
Post subject: 
these are the 2 true relevant threads I've found in the NA performance BG section... http://www.club323f.com/club323f/forum/ ... hp?t=19583
http://www.club323f.com/club323f/forum/ ... hp?t=17715
very good info, except I'm looking for more specifics so that I can add that information into the FAQ
the "pre-cat" BP is the leaded fuel version... back in ye olden days, you guys had leaded petrol ;) use of leaded petrol in a catted car would mean it will clog it up and/or ruin it

anyone know of the valve timing specs of them? lift? if someone here has access to the UK/Europe service manual, it will be in there under the technical data sections... otherwise it will be in the training manual
Author:  Neil F [ Sat Oct 13, 2007 8:45 pm ]
Post subject: 
The pre-cat BG was unleaded.
No UK 89 onwards Mazda ran on leaded fuel. Whether they had a cat or not. :wink:
I do believe someone here has the service manual, or the big yellow book as its also known.....
Author:  TheMAN [ Sat Oct 13, 2007 8:59 pm ]
Post subject: 
ok, symantecs... regardless, that engine and ECU was tuned to run on leaded fuel... the same engine was sold on the LHD versions on the continent during that time where those countries were still using leaded fuel ;)
Author:  DaVe0r [ Sun Oct 14, 2007 9:37 am ]
Post subject: 
really so the BP22 cams, Pistons (9.8:1) and ECU are for Leaded fuel only
interesting ...me thinks AV Gas for the current N/A build
It explains alot,, No 02 sensors, No Cat, different idle controll etc

In NZ we had one other car that came fitted with the 1.8 BP22 engine, that was the Ford laser TX3 ..not sure what year thou!! guessing 1989+

i dont no when Unleaded fuel was stopped in NZ
Author:  Neil F [ Sun Oct 14, 2007 10:44 pm ]
Post subject: 
DaVe0r wrote:
really so the BP22 cams, Pistons (9.8:1) and ECU are for Leaded fuel only


:roll: No.
They might be suitable or tuned for leaded fuel in other countries, I don't know, but UK spec BG's were never ran on leaded fuel. According to the handbook that came with my BG GT, which was a pre-cat, it was to be run on unleaded only, as leaded fuel could cause damage to the engine.
I had no cat and no O2 sensor.
Author:  TheMAN [ Mon Oct 15, 2007 6:04 am ]
Post subject: 
the owner's manual is wrong, like many instances I've found in other years of the "323"
if the car has no cat, no O2 sensor, running the BP22 cams, high compression pistons, and uses the BP22 ECU, then IT IS tuned to run on leaded fuel

it doesn't say so in the UK parts catalogue, but looking at the LHD european one does indicate that it is for leaded fuel
there's no reason not to run an EFI engine without an O2 sensor except for when using leaded petrol... the reason being is the lead will plug up the sensor and render it useless... the cat isn't there either because the lead will screw it up!

when running an engine designed for leaded petrol with unleaded, you should be using the highest octane available because lead in the fuel originally is meant to be an "easy" octane booster and also helps "cushions" engine internals
Author:  Neil F [ Mon Oct 15, 2007 5:13 pm ]
Post subject: 
So it could have been run on leaded fuel without making any adjustments whatsoever?
Surely the ignition timing would need adjusting? :dontknow:
I used to run my BG on super unleaded, which is 97ron.
Author:  TheMAN [ Mon Oct 15, 2007 6:32 pm ]
Post subject: 
yes it will run just fine with no adjustments
Author:  TheMAN [ Thu Oct 25, 2007 5:58 am ]
Post subject: 
bump for more info
Author:  TheMAN [ Sat Oct 22, 2011 9:59 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
necroing this thread again... I really want to know more about this engine!
Anyone manage to get the real Mazda shop manual or have access to one (bribe the dealer)? A mere photocopy of the technical data pages is sufficient!
Author:  Jacek176 [ Thu Mar 22, 2012 10:20 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
Hello,
here you is an article about differences about different versions of BP engines:
http://www.clubprotege.com/forum/showthread.php?55020-SOHC-103hp-vs-DOHC-128hp-vs-DOHC-137hp-differences
Originally it was written by me, translated from polish to english by l3mur91. Camshafts research was done by jackkpl
Author:  lewp91 [ Thu Mar 22, 2012 3:49 pm ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
Image
Author:  Jacek176 [ Thu Mar 22, 2012 6:44 pm ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
Don't you have anything more intelligent to write?
If you say that this thread is dead you might as well say that this whole forum is dead. At least this subforum. It was 4th or 5th topic from the top.
Author:  lewp91 [ Sat Mar 24, 2012 4:42 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
it was a joke :)
Author:  mazdaman323 [ Wed Jul 04, 2012 11:10 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
i had a bp22 engine in my 323 bg 3 door. it was a pre cat version so it had no lambda sensor and was meant for un-leaded fuel. i know this because it was plastered all over the car! lol. inside the fuel cap it said unleaded only and also in the owners manual. i still have the air flow meter, ecu and cams if anyones interested. hope this helps
Author:  mazdaman323 [ Fri Oct 24, 2014 8:25 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
as i now have another one of these engines i have done a lot of research involving speaking with Mazda directly. they have confirmed that going by the chassis number (BG137) the seven in the start defines fuel type which is LEADED fuel. Because of the robust design of the engine it can easily handle unleaded fuel. the lead in the fuel in other cars used to look after the valve guides and seats but due to Mazda being awesome they already used toughened guides and seats. i have also read that the exhintake cam swap does not work using BP05 and a BP22 Cam. you need to use two BP06 cams from a slightly later mx5 or 323. although the standard cams in the BP22 engine are better than BP06 x2 cam swap. there is a more even pull in torque over the rev range. i have a spare set of BP22 cams in stock if anyone is interested.

Thanks for reading

Si
Author:  HMT [ Fri Oct 24, 2014 8:11 pm ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
So what's the exhaust cam in a BP22 engine?
Author:  mazdaman323 [ Wed Oct 29, 2014 1:39 pm ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
the exhaust cam is a BP05 and the intake is BP22.
Author:  mazdaman323 [ Thu Oct 30, 2014 9:03 am ]
Post subject:  Re: BP22 intake camshaft on 1.8l DOHC engine
just had my spare inlet cam measured. its 237 duration and 8.6mm lift
Page 1 of 1 All times are UTC [ DST ]
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/