Need your thoughts on extractors

[wagonman]

Hi All,
I would love to hear your opinions on weather to put extractors on my VH. We all know GM chocked the SH*t out of them with all the pollution crap, but what my dilema is the following ; It's a 1 owner SLX with only 137,000 K's mint condition inside / out running the high comp 202 Blue with tri & salisbury, because of its condition & low K's I'm in 2 minds with keeping it Stock but @ the same time, I'd like a bit more bang with a nice note & better fuel econemy. I've read mixed opinions here on extractors ( I do have a set lying around ) love to hear what you recomend & I'm on a budget like everybody else.

Cheers Gang

wagonman

[sam5l]

let your motor breathe with a set of extractors

[wagonman]

Thanks sam51,
Do I then need to follow it up with a "sports" exhaust system all the way through ?

[project commy]

you dont need to but it does make a difference as the standard muffler and press bend pipes restrict the flow of gases a fair bit. be sure to get a good muffler (ie str hi flow) and not a triple reverse flow standard one as they are crap.

[peckzz]

tell ya a lil trick, put those extractors on, that will help ya alot, get a 2 1/4 ehaust, punch whole straight through the guts of ya cat (high flow cat then) 1 muffler b4 the diff then none after that, will get a bit more bang for buck to that way, best way is put a pod on wit that aswell, open the exhaust u usually open up the intake a bit to let it breathe

[GetToDaChopa]

tell ya a lil trick, put those extractors on, that will help ya alot, get a 2 1/4 ehaust, punch whole straight through the guts of ya cat (high flow cat then) 1 muffler b4 the diff then none after that, will get a bit more bang for buck to that way, best way is put a pod on wit that aswell, open the exhaust u usually open up the intake a bit to let it breathe

Don't give people stupid advise.

[crazybiker]

tell ya a lil trick, put those extractors on, that will help ya alot, get a 2 1/4 ehaust, punch whole straight through the guts of ya cat (high flow cat then) 1 muffler b4 the diff then none after that, will get a bit more bang for buck to that way, best way is put a pod on wit that aswell, open the exhaust u usually open up the intake a bit to let it breathe

don't give people stupid advise.

That's pretty bad advice, but you know what I find even worse, the part I've put in red.

[project commy]

a carby fed 202 does not legaly require a cat unless it is running on unleaded fuel, and then also only needing a one muffler exhaust system.

[wagonman]

Thanks for all your advice guys, just a couple of more questions;
My extractors dont have a connection part for the EFE (vac/gases) pod, will this effect anything, IE; running, roadworthy,etc

Would I have a simular outcome if I was to just run a high flo cat & 2 1/4 system all the way.

BTW, I'm not getting email notifiers on replies.

Thanks again all

[v6lux]

BTW, I'm not getting email notifiers on replies.

You will need to select GO ADVANCED then select what type of notification you want. I'll tell you now, wont be getting any from this one!

I would love to hear your opinions on weather to put extractors on my VH.

As for my opinion on extractors for a daily driver;

WANK Factor!

Extractors are for competition where high revs are involved and you will know your getting good use out of them when you have to replace them because they are falling to bits after 1 or 2 race events!
If they last you a couple of years or more, you are wasting your money - how about I send you my bank account details and a letter telling you how good you look in your car? At least you will get more out of that!

That is all!

[crazybiker]

@ V6lux

I put extractors on my VN V6, which is my daily....It made quite the difference actually. Alot better in both, lower and upper rev ranges.

[ari666]

dont do this:

punch whole straight through the guts of ya cat (high flow cat then)

dont fit extractors either if you wanna keep it fairly stock. extractors do bugger all on stock cammed engines. you only really need them if you have a cam and low manifold vacuum.

best thing you can do is clean up your exhaust, so grab your die grinder, port match your manifold to the head and clean up any obstructions that may be in your pipes (carbon etc) i would say check your cat and replace it if necessary, cos they can melt if the wrong fuel is used.

[GetToDaChopa]

I'll disagree partially. I do think extractors would be better with a cam and so on. But i'd put them on anyway, its good fun either way.

[Not_An_Abba_Fan]

The key word here is 'extractors', why are they called extractors? Because they extract exhaust out of the head. The more exhaust you get out of the combustion chamber and exhaust ports, and the faster you can move it, the more clean air you can get in. That is the sole purpose of extractors, more power and torque is just the by product.

On a stock engine they do wonders for fuel economy. You will get a better 'seat of the pants' effect but it won't really do much for dyno figures on a 6.

Oh, and peckzz, you're an idiot. Not only does punching a cat render it illegal, a VH does not even have a cat.

Even if you run unleaded, which you have to do now anyway because you can't get leaded fuel anymore...you still don't need a cat. The only reason you would need to fit a cat to pre '86 vehicle is if you fitted an engine that was out of a car that had one.

[Drewie]

Several years ago we put extractors on our 202 VC Commodore as where the inlet and exhaust manifolds bolt together there is a valve or port which lets exhaust gas into a chamber in the inlet manifold to heat the inlet manifold in cold weather. Where this valve or port is, the manifold had warped and was leaking exhaust gas at the joint, so we were advised by a reputable exhaust crowd that the only fix was a set of extractors and bugger off the exhaust manifold, the hole in the inlet manifold was them blanked off.
The problem is in the warmer months the car runs faultlessly and idles beautifully, however when the colder months arrive it is a prick to drive and down right dangerous, as it no longer has a heated inlet manifold it stalls something shocking on a cold day, it starts first pop on the auto choke (has a rebuilt carby in perfect order) you can sit there and let it warm up, drive off, first set of lights it stalls, starts first pop again but every time you stop you can feal it go off beat and stall, needs quite a few km to really come up to temp, I have spoken to a few carby places and they have all said it's because of the lack of a heated manifold and the fuel is not vaporising properly and nothing you can do about it except to go back to the original factory manifolds.
I have had it stall in some pretty nasty places like in the middle of a right turn, but come the warmer months and it drives like a new car. If I had my time over again I would have looked for an original factory set-up. I have even upped the idle for the colder months, it helps a bit, but still stalls every now and then. Just something to consider unless you can get some extractors with some way of supply heat to the inlet manifold.

[wagonman]

Thank you all for your advice gang, it's all good.

Drewie ; This is one of my main concerns with it, thats why I posed the secondary question of, is it a worthwhile exercise in just putting in a 2 1/4 sports system with a high flow s/steel muffler on from the factory exhaust y pipe back ?

Wagonman

[Not_An_Abba_Fan]

Several years ago we put extractors on our 202 VC Commodore as where the inlet and exhaust manifolds bolt together there is a valve or port which lets exhaust gas into a chamber in the inlet manifold to heat the inlet manifold in cold weather. Where this valve or port is, the manifold had warped and was leaking exhaust gas at the joint, so we were advised by a reputable exhaust crowd that the only fix was a set of extractors and bugger off the exhaust manifold, the hole in the inlet manifold was them blanked off.
The problem is in the warmer months the car runs faultlessly and idles beautifully, however when the colder months arrive it is a prick to drive and down right dangerous, as it no longer has a heated inlet manifold it stalls something shocking on a cold day, it starts first pop on the auto choke (has a rebuilt carby in perfect order) you can sit there and let it warm up, drive off, first set of lights it stalls, starts first pop again but every time you stop you can feal it go off beat and stall, needs quite a few km to really come up to temp, I have spoken to a few carby places and they have all said it's because of the lack of a heated manifold and the fuel is not vaporising properly and nothing you can do about it except to go back to the original factory manifolds.
I have had it stall in some pretty nasty places like in the middle of a right turn, but come the warmer months and it drives like a new car. If I had my time over again I would have looked for an original factory set-up. I have even upped the idle for the colder months, it helps a bit, but still stalls every now and then. Just something to consider unless you can get some extractors with some way of supply heat to the inlet manifold.

If the correct set of extractors were used, they have the heat riser pipe and plate that bolts to the inlet manifold.

Thank you all for your advice gang, it's all good.

Drewie ; This is one of my main concerns with it, thats why I posed the secondary question of, is it a worthwhile exercise in just putting in a 2 1/4 sports system with a high flow s/steel muffler on from the factory exhaust y pipe back ?

Wagonman

Yes and no. If it is a better note you are after, yes, other than that it won't do much. You will notice a bit better top end but that's about it, to benifit from it you need extractors.