488 replies to this topic

[fezzasus]

Got mine from Autovaux - http://www.autovaux....exos2-opel.aspx

[fezzasus]

Exhaust system sorted.

 

2bular 3" backbox.

 

 

Tullett cat and manifold.

 

 

Was hoping to start on the car this weekend, but I broke my Vectra while collecting the parts from Tullett. I suspect it's DMF failure, however the noise persists (sounds like stirring coal) with the clutch both engaged and disengaged... I'll know more come Monday (unless anyone has any suggestions).

Edited by fezzasus, 04 July 2015 - 10:52 AM.

[CHILL Gone DUTCH]

did you get the 3" back box with one of the outlets blocked to reduce DBs ?

 

is that one of the supersiezed back boxes like mine ?

 

good idea to get a wideband in while you are there ??

Edited by CHILL Gone DUTCH, 04 July 2015 - 05:01 PM.

[fezzasus]

Jusrt a bog-standard 3" exhaust. I'm hoping I won't need a wideband. Peter's maps are pretty accurate, so should be within the capability of the normal lambda sensors.

 

noise from the exhaust is something i'll pay close attention to. With the enclosed air filter I should be okay, however we'll see.

 

Need to source an engine crane now.

[CHILL Gone DUTCH]

Hi Tom Not sure what configuration your running the Saab in but anything over 250hp stage two Should really have a wideband installed Ps what configuration are you running with the Saab

[CHILL Gone DUTCH]

Just seen your spec on previous page I think you should be using a wideband for reasons above ( over 250hp )

[fezzasus]

I'm not convinced. a narrowband will tell the car if it's running rich or lean. the ECU will then modify. The problem with narrowband is that they don't know how far off stoicometric it is. This leads to a sawtooth style adjustment where it could overshoot and slowly narrow in on the value. As long as i don't run for too long at either extreme I shouldn't have a problem. after all, once i've mapped it, the wideband is just extra cost which isn't bringing any value.

[fezzasus]

now if I end up cutting melted catalyst out of my exhaust, i'll be willing to say I was wrong

[CHILL Gone DUTCH]

It is up to you Tom But it would be a shame to go against what peter says would be a safe way to map the car Especially with a new engine after what happened to your last one,

[fezzasus]

Well the failure of the old one had nothing to do with mapping. It was fretting of the valve keeper.

 

In reality, the only difference between mapping at above 250 bhp verses lower is the potential of the extreme conditions causing damage to the engine. As long as i avoid running under these conditions for a prolonged time, i'll be fine.

 

HOWEVER. This car will need an MOT right away, that might be a good reason to get a wideband, as i'll need to get it close to passing emissions pretty quickly...

 

hmm.

 

 

Is there any way to entirely replace pre-cat narrowband with a wideband?

Edited by fezzasus, 04 July 2015 - 08:01 PM.

[CHILL Gone DUTCH]

I know when I'm fighting a losing battle Good luck

[fezzasus]

I know when I'm fighting a losing battle Good luck

 

i see your point Chris, my resistance purely comes from the modifications needed to fit the wideband purely for the sake of mapping. I'm really going to try to keep the car in one state of tune once this is all done, so it's hard to justify fitting it for mapping reasons.

[fezzasus]

on a similar subject, I need to give serious consideration over what power i'd actually like out of this thing, as currently i've got VXR injectors which will max out at around 280 bhp, and the original fuel pump, which will probably drop off at the same point.

[CHILL Gone DUTCH]

The only real modification needed is a bung welded into exhaust and a bit of wiring to the old egr valve and to appropriate feeds / switched It would be a shame to spoil your engine because of you haven't done something It's also good for ignition mapping also On your other point my vxr injectors ran out at around 275 hp at 80% duty cycle @ 7500 revs on 3.1 pulley but you might get a bit more because of your 2.0 rather than 2.2 It's also a good worry gauge of you have a live pod readout in cabin

[fezzasus]

It's a shame you fixed the air filter problem, I would have liked to have known if the exhaust or charger were the limiting factor in power output.

 

My dilemma is this; i would prefer reliable power rather than maximum power, but it would be a shame not to maximise the potential of the engine if it's a simple change. for example, i wouldn't want to be limited by the injectors. It's hard to second guess what the limit of the engine is without setting it all up, but I don't want to do this in stages because it becomes a never ending project.

[CHILL Gone DUTCH]

IMO the 2.5" exhaust was restricting my engine from 260+ hp but did push on to 305 ish hp but did cause the wadding to regularly come out of the exhaust Don't forget I only ever used a 3.1 pulley do I'm in no doubt the m62 could make more power but the exhaust contents wouldent of lasted 5 mins You can see in Carl's z22se Astra that m62 can make good power 330+ hp but I suspect it's not sustained power and. You would have to spin the m62 very hard with a silly small pulley And beat the heat I'm sure with you setup with bigger injectors you could easily make 310-320 hp dependant on hoe much time you want to put in to the mapping

[CHILL Gone DUTCH]

How ever you look at it You are going to be taking a risk without a wideband My question is Is it worth the risk

[fezzasus]

Problem with running the M62 at that speed is the bearings. They're not rated for it. I won't be going less than my 2.9 pulley.

 

As for the engine, we'll see. neoBros are selling new ones for £500 now, almost worth taking a punt, right?

[fezzasus]

Work is happening...

 

Last weekend I changed the subframe shims. Duralac, new shims, new bolts, all back together

 

 

Cleaned up the subframe. Wasn't entirely happy with the silver POR15, it was lifting at the edges of the subframe, so knocked it all off and applied Bilt Hamber hydrate 80. Will prime and spray silver 

 

 

Confirmed the Tullett manifold and cat section fit the 2bular backbox.

 

 

This weekend I will be mainly fitting a new bathroom, while waiting for my new dipstick and pipe joining sections to turn up. Exhaust mounts and Corsa radiator S bend (hopefully to relocate the gearbox side water pipe around the saab oil cooler) already here.

[fezzasus]

Progress.

 

 

 

Also found this hiding in the inlet manifold.