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 Post subject: what cams?
PostPosted: Tue Jan 17, 2012 12:49 pm 
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Car Model: saab 9000
What cams are best for b234 early turbo engine, I have choice between b234 '92 NA and b202 '92 turbo cams? Or some combination of this four cams?


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 Post subject: Re: what cams?
PostPosted: Tue Jan 17, 2012 10:46 pm 
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Most proven: Keep the turbo B234 exhaust cam but fit the Intake cam from you B234 N/A. This will lift the top end a little.

The B202 cams have more potential but the timing does not quite line up so you need to dial them in manually to get them to 'work' which is a whole new world of time consuming messing....

Can you get me the part number from your '92 B234 NA and I'll check it for you?

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 Post subject: Re: what cams?
PostPosted: Tue Jan 17, 2012 10:53 pm 
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Phil, if he has a longblock b234 (I only ask, as he mentions early 2.3 turbo) it'll have the longblock head and the b202 cams will line up perfectly......it's only when swapping into the T5 head that they go out of kilter.

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 Post subject: Re: what cams?
PostPosted: Tue Jan 17, 2012 11:23 pm 
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Good point - I'll need to look at that.

B202 cams AND B234i have good intake cams but the timing on the exhaust cam is vary so worth checking each one. To be fair the exhaust cam doesnt have as big an effect on the power VS intake but it's worth doing it well for the effort.

eg: 1985 only B202 exhaust Cam is good.... 1986-1993 is not so good as it's much more advanced. The exhaust cam from the B234i 1992 is 'better'

1985 to 1993 intake looks good though - Same timing as the B234i 1992 but more duration. I'll dig out some numbers but sounds like there's enough to make a good starter choice.

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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 10:20 am 
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yes, it is long block b234i. so, you suggest to use b202 intake but leave b234i exhaust cam?

And what is with head, my plan is to port and use one of this two heads (202, or 234)? I Saw that 234 have pretty much meat to take off inside ports.

I am not at home next few days so can get cam numbers when get back.


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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 11:02 am 
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Ok - I've had a proper look (I never really look at B202 timing as most folks are using them on T5 so the timing doesnt work).
In your case it should all work and for top end flow, you want to retard the intake cam and increase duration as much as possible.
You also want to retard the exhaust cam but retarding too much will affect spool.

Intake: (bigger centreline = more retared)
B202 1986-1993: Duration: 252 CentreLine: 110deg. Marginally better.
B234i 1992 Duration 246 Centreline: 110deg.

Exhaust: (bigger centreline = more advanced)
B202 1986-1993 Duration: 254 Centreline: 114deg
B234i 1992 Duration: 246 Centreline : 110deg Good cam.

Centrelines of 110/110 are a very good base to run with. All of the above area bit better flowing than T5 cams and much more than T7 Cams.

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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 11:46 am 
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It looks like it is little better to use b202 cams, but to retard intake cam on oem (non adjustable) chain drive I can do it only for whole tooth, is that too much?


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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 12:37 pm 
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You can mix and match - I was agreeing with what you suggested although I forgot to say that. :oops:

B202 Intake Cam
B234i 1992 Exhaust cam.

You'd be best to bolt them in - if it does line up to 110/110 then it will have a nice sparkle up top and you can also run plenty of ignition (make sure you ramp it up a bit, if you can - to take advantage of the cams)

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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 1:04 pm 
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Great thank you!

I will use stand allone management for custom mapping, for now probably dta s40 as I have it from last project, but shall repace it with megasquirt later as from my experience dta is not very nice ecu...it have several bugs.

Would you rather use b202 or b234 head for porting job?


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 Post subject: Re: what cams?
PostPosted: Wed Jan 18, 2012 6:06 pm 
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Have you already bought the standalone management? If not, you would be better off getting a trionic 5 engine loom and ecu and following the process that classic 900 guys do to convert to T5

jaguar82 wrote:
Would you rather use b202 or b234 head for porting job?

go with the b234 - it has larger ports to start with

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 Post subject: Re: what cams?
PostPosted: Thu Jan 19, 2012 10:44 am 
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Thanks! I already have management and will upload standard t5 map in as a base for tweaking. also have wb sensor, coil, 4 bar map sensor, digital boost control so mapping is not a problem.


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 Post subject: Re: what cams?
PostPosted: Thu Jan 19, 2012 10:52 am 
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knock sensor??

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 Post subject: Re: what cams?
PostPosted: Thu Jan 19, 2012 12:54 pm 
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few of them ;)


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 Post subject: Re: what cams?
PostPosted: Sun Feb 05, 2012 4:50 pm 
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ok, I check out that in b234 engine are 911669 and 911670 cams, and found on some forum that this cams are really standard for this engine from 90-92 year, that's ok but from that table ( http://www.900aero.com/main/tech_main_cams.htm ) I see that they wrote spec only for B234 engine (not b234i or b234 turbo) does it mean that in that early years all b234 engines shared same internals (na and turbos) ?


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 Post subject: Re: what cams?
PostPosted: Tue Jan 10, 2017 6:48 pm 
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Location: southend on sea essex
Car Model: 2003 9-5 aero wagon
For anyone looking for b234i inlet cams Rand in holland have got some in stock £125 shipped


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 Post subject: Re: what cams?
PostPosted: Tue Jan 10, 2017 6:57 pm 
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What are the 1993 B234R T5 cams like? same as the B234L ones?

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 Post subject: Re: what cams?
PostPosted: Tue Jan 10, 2017 9:01 pm 
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Cams line up perfectly, they are what I've got in my Carlsson engine. Knock sensor? No need if you are converting to T5 or have I missed something...
I just need a decent mapped ecu to go with my gt2860rs with 630cc injectors, 3 bar map sensor and T7 apc conversion......Phil? ;-)


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 Post subject: Re: what cams?
PostPosted: Wed Jan 11, 2017 12:51 am 
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Location: The wee county Scotland
Car Model: Saab 9000 aero
mrd2525 wrote:
Cams line up perfectly, they are what I've got in my Carlsson engine. Knock sensor? No need if you are converting to T5 or have I missed something...
I just need a decent mapped ecu to go with my gt2860rs with 630cc injectors, 3 bar map sensor and T7 apc conversion......Phil? ;-)


Mark I believe Phil is busy preparing his hair dressers car the up coming track day season.

Oops there goes my map tweak :D

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