Just back from a visit to Andy Forrest, and i would like to thank him for the work and time he spent on my car today.It has totally changed the car and im loving it,hopefully i will get away with the pops and bangs as we had two close calls with the police on the way back.But i did say to him i would like it to pop and bang so thats what he did. It sounds like a rally car on the motorway it will do it constanly so im going to try and get used to the driving style by diping the clutch when your on the overrun if i dont want it to go off like a bomb.Sorry Andy for phoning you back about it so soon after leaving, but it seems to have been not to bad tonight. Thanks again and i would recomend you 1st to anyone, Sean:notworthy

So what have you had done then for the pops and bangs?? anti lag fitted??:)

Probably a full decat, that normally does the job ;) and a bit of overfuelling :D

Tony:)

yep a wee bit of over fueling only on the over run, but i mean this is loud!!! hopfully i will get away with it as i had two close calls on the motoryway with the cops on the way home, but i did ask for a few pops and bangs to be includded in the deal:norty:

Don't fancy that myself ! Will I be able to avoid that if I go for a Sportscat dp ?

Don't fancy that myself ! Will I be able to avoid that if I go for a Sportscat dp ?

Andy,

Yes, it's not a necessary part of having the cat decatted, or putting a sports cat on. The pops and bangs are mapped in deliberately at the request of the customer; some people like em.

Mine will pop a bit (not loudly) on the over-run in second.

Ns04

Andy,

Yes, it's not a necessary part of having the cat decatted, or putting a sports cat on. The pops and bangs are mapped in deliberately at the request of the customer; some people like em.

Mine will pop a bit (not loudly) on the over-run in second.

Ns04

Phew ! (Would be a laugh driving by the office though ! :D ).

Ns04 - off thread - what supension gizmos do you have on your Scoob to cope with it's 320 + bhp ?

Probably a full decat, that normally does the job ;) and a bit of overfuelling :D

Tony:)

Tony, i`m new to Scoobs so forgive what might be a silly question, is overfueling safe then??:o :o

Bad news for cats, but running lean is more dangerous as it causes detination. Oops there goes no3

Phew ! (Would be a laugh driving by the office though ! :D ).

Ns04 - off thread - what supension gizmos do you have on your Scoob to cope with it's 320 + bhp ?

Andy,

None mate! It doesn't need them! I find UK suspension set up to be well resolved for UK roads. You'll frequently read on here people saying you simply must have this brake set up/suspension set up to cope with extra power. I don't agree, especially for road use!

That's certainly not to say it wouldn't be improved by them. I'm planing front and rear ARBs and a good geometery set up when the pennies permit.

Ns04

Tony, i`m new to Scoobs so forgive what might be a silly question, is overfueling safe then??:o :o

My car pops and bangs on over run, the mapper just puts fuel in mate, at certain points, mines around the 3k mark, you should no this mate:luxhello:

My car pops and bangs on over run, the mapper just puts fuel in mate, at certain points, mines around the 3k mark, you should no this mate:luxhello:

Yeah, bit you`ve also got anti slag Paul...:) :)


I knew what it was mate, just wondered if it had nasty effects....:confused:

just read this....

Anti-lag is terribly bad for your turbocharger, exhaust manifold and exhaust system in general: the exhaust gas is significantly warmer (technically, still burning) as it is going through the turbo. The system will usually have an off switch. Cars fitted with the system need frequent check-ups on the turbos and exhaust systems.

True or false?

How much are anti-lag systems?

just read this....

Anti-lag is terribly bad for your turbocharger, exhaust manifold and exhaust system in general: the exhaust gas is significantly warmer (technically, still burning) as it is going through the turbo. The system will usually have an off switch. Cars fitted with the system need frequent check-ups on the turbos and exhaust systems.

True or false?

How much are anti-lag systems?


I had it on my Tommi Mak for over 6 months and no problems at all, mine was a switchable one not a fully blown WRC style ant-lag, but awesome pops & bangs and flames...:cool:

Andy,

None mate! It doesn't need them! I find UK suspension set up to be well resolved for UK roads. You'll frequently read on here people saying you simply must have this brake set up/suspension set up to cope with extra power. I don't agree, especially for road use!

That's certainly not to say it wouldn't be improved by them. I'm planing front and rear ARBs and a good geometery set up when the pennies permit.

Ns04

cheers Ns04.

I have Prodrive springs with Prodrive geometry and Whiteline ARB/Droplinks and thoroughly recommend them. Having said that, although they "turn in" nicely enough, Newage WRXs are a bit wobbly as std ! Feels very sharp in current guise.

Andy

Just back from a visit to Andy Forrest, and i would like to thank him for the work and time he spent on my car today.It has totally changed the car and im loving it,hopefully i will get away with the pops and bangs as we had two close calls with the police on the way back.But i did say to him i would like it to pop and bang so thats what he did. It sounds like a rally car on the motorway it will do it constanly so im going to try and get used to the driving style by diping the clutch when your on the overrun if i dont want it to go off like a bomb.Sorry Andy for phoning you back about it so soon after leaving, but it seems to have been not to bad tonight. Thanks again and i would recomend you 1st to anyone, Sean:notworthy

What are the negative effects of having this setup??

What are the negative effects of having this setup??


Overly affectionate PC Plods ! :D

It sounds like a rally car on the motorway

OH MY GOD!! :eek:

Another Rally Wannabbee on the roads :rolleyes:

Just what we need ............ chavvie-tastic!!!

What are the negative effects of having this setup??

Apart from everyone pointing and laughing at you, you mean?? :lol1:

Its not Anti-lag and its not overfueling so no potential for damage, other than pedestrians perforated ear drums ;)

The only downside is the novelty will wear off and it isn't switchable. Well, not on UK cars anyway, JDM Sti is a different story ;)

Andy

Its not Anti-lag and its not overfueling so no potential for damage, other than pedestrians perforated ear drums ;)
Andy

What exactly gives the pops and bangs then if not unburnt fuel?

What exactly gives the pops and bangs then if not unburnt fuel?

Andy hanging out of you passenger window with a Uzi 9mm??? :wonder: ;) :D The Det cans are really just ear protectors so he doesn't damage his ears whilst picking off BMW drivers!! ;) :D

Truth is that pops and bangs is unburnt fuel - despite what anyone says .... and thats overfuelling unless I am convinced otherwise.

Its not Anti-lag and its not overfueling so no potential for damage, other than pedestrians perforated ear drums ;)

The only downside is the novelty will wear off and it isn't switchable. Well, not on UK cars anyway, JDM Sti is a different story ;)

Andy

Could it be put on the heater switch? like the low/high boost.

Apart from everyone pointing and laughing at you, you mean?? :lol1:

At least i wouldn't be able to hear what they're saying. :)

There is a subtle difference between unburned fuel and overfueling.

Its not overfueling so there no risk of borewash. The timing is retarded 'to a degree' ;) Ignition still takes place but so late in the cycle that some air/fuel mix gets to the hot exhaust before it has completed the burn. This is just whilst on very high vacuum closed throttle overrun and in a particular rpm band, as soon as you touch the throttle or dip the clutch the engine responds as normal.

Andy

I remember when Andy mapped mine for pops and bangs and flames really pi$$ed off a transit driver when we overtook him slowed to a snails pace them nailed him leaving him in a trail of pops,bangs and flames.I think i remember him giving me a Gareth Hunt wave :D

There is a subtle difference between unburned fuel and overfueling.
Andy

Unburnt fuel is reaching the inside of the exhaust ..... thats fuel that was not required by the engine to get the desired power ..... thats overfueling.

Now, if its done so that the kiddies can sound like a real life Rally driver, fine - but lets not try and say that unburnt fuel is somehow NOT overfuelling, eh? ;)

Unburnt fuel is reaching the inside of the exhaust ..... thats fuel that was not required by the engine to get the desired power ..... thats overfueling.

Now, if its done so that the kiddies can sound like a real life Rally driver, fine - but lets not try and say that unburnt fuel is somehow NOT overfuelling, eh? ;)

Its not really overfuelling though Pete, only the ignition point of the fuel air mixture is being changed, thus creating pops bangs farts and flames. If the ignition stayed as normal the same quantity of fuel would still be ignited. :thumb:

I didn't expect everyone would understand :D

The pop and bang is in fact the final stage of combustion....... so there is no overfueling, no unburned fuel.

It is infact a misconception that you overfuel a car to get it to pop and bang, proper anti lag overfuels in order to reduce the intense heat caused by full-on anti lag. (not to get pops and bangs :D )

You should be aware of this Pete, take an older carb type car and pull the choke on to make it overfuel...... no pops and bangs, it just kills the power.
Start to run out of fuel however (lean running) and it will pop and bang.