pops and bangs
Discussion
Recently had my de-catted Sag re-mapped at TVR Power - pops and bangs are a delight 
It popped and banged before as a result of the de-cat.
You can buy a de-cat chip from Power for £250 I think, or pay about £650+vat for a full day's bespoke mapping, which might get you about an extra 20bhp/lbsft, but will protect the engine by being mapped correctly.
It popped and banged before as a result of the de-cat.
You can buy a de-cat chip from Power for £250 I think, or pay about £650+vat for a full day's bespoke mapping, which might get you about an extra 20bhp/lbsft, but will protect the engine by being mapped correctly.
The decat tends to lead to a slight loss of back pressure; a remap is meant to compensate for that. My MK1 has been serviced last week; I have asked for a EPROM upgrade at PPC. The reply was that (TVR Power) are not very keen on installing them unless combined with a rebuild/ upgrade; a road test carried out by PPC has shown that my Tuscan actually has a slight amount of wear in the throttle bodies. I have mistaken the "flat spot" after the decat for lack of back pressure- proven wrong in my case. The decat only "accentuated" the real problem in my case.
I would have thought there are a lot of decatted Tuscans out there without re- mapping; I'd be surprised to see engine damage to pass without being a major subject on the forum.
You should be fine without remap IMHO.
I would have thought there are a lot of decatted Tuscans out there without re- mapping; I'd be surprised to see engine damage to pass without being a major subject on the forum.
You should be fine without remap IMHO.
as said, think you are fine without remap...pops and bangs are very normal 
TVR Power do sell a decat chip but prefer to know the car cause the wrong chip / map can do a lot of damage...i think its less that £250 though, give them a call and have a chat, Dom will give you any answers you want...
TVR Power do sell a decat chip but prefer to know the car cause the wrong chip / map can do a lot of damage...i think its less that £250 though, give them a call and have a chat, Dom will give you any answers you want...
bananaface said:
Ahhh the answer to my question maybe.
The remap whilst making the car run better does effect the poppiness and the banginess..
Maybe I can do without.
Thanks.
At last an answer to the actual question and not ajp drivers just talking about their overrrun !
Err nope!The remap whilst making the car run better does effect the poppiness and the banginess..
Maybe I can do without.
Thanks.
At last an answer to the actual question and not ajp drivers just talking about their overrrun !
I spent a day with Dom and had mine mapped on his rolling road.
It still pops like a barsteward, but runs very nicely around town too and will idle quite nicely from cold unless its very cold outside..
bananaface said:
Ahhh the answer to my question maybe.
The remap whilst making the car run better does effect the poppiness and the banginess..
Maybe I can do without.
Thanks.
At last an answer to the actual question and not ajp drivers just talking about their overrrun !
Think you may be getting slightly confused hereThe remap whilst making the car run better does effect the poppiness and the banginess..
Maybe I can do without.
Thanks.
At last an answer to the actual question and not ajp drivers just talking about their overrrun !
Ratboiler, is talking about fitting a modern ECU, which will fire each injector and spark plug individually
remapping the old ECU doesn't do this, since you don't have enough outputs or a cam sensor
hope this helps
ratboiler said:
Have to agree with Walford, just got my Tuscan which is fitted with an Omex710 and not even a hint of a pop or bang which was a bit of a disappointment, but it does go well and tick over perfect.
My heart goes out to you..... No pops and bangs, I couldn't live with it personally, it's fun
bananaface said:
I think we're saying that the power generic chip is fine and the power/austec etc full dyno map is also fine although dearer. Either way it shud be done to avoid possible damage.
But bangs will remain nonetheless.
NoBut bangs will remain nonetheless.
The pops and bangs are fuel being ignited by the wasted spark from the MBE
take away the fuel or the wasted spark = no more pop and bang
Walford said:
No
The pops and bangs are fuel being ignited by the wasted spark from the MBE
take away the fuel or the wasted spark = no more pop and bang
If pops and bangs are caused by a wasted spark how does the noise exit the exhaust pipe? The wasted spark would be igniting fuel inside the combustion chamber with inlet and exhaust valves closed.The pops and bangs are fuel being ignited by the wasted spark from the MBE
take away the fuel or the wasted spark = no more pop and bang
Indeed, wasted sparks would actually prevent pops and bangs, the Speed 6 is no 2CV (or Detroit iron - only joking Walford ).
The Speed 6 uses batch injection and therefore fuel is injected into throttle bodies that dont require fuel at that time. Ignition of this unused fuel is then initiated as it exits the exhaust valve and hits the hot exhaust, hence more snap, crackle and pop when all is nice and hot.
).The Speed 6 uses batch injection and therefore fuel is injected into throttle bodies that dont require fuel at that time. Ignition of this unused fuel is then initiated as it exits the exhaust valve and hits the hot exhaust, hence more snap, crackle and pop when all is nice and hot.
Chad speed said:
Walford said:
No
The pops and bangs are fuel being ignited by the wasted spark from the MBE
take away the fuel or the wasted spark = no more pop and bang
If pops and bangs are caused by a wasted spark how does the noise exit the exhaust pipe? The wasted spark would be igniting fuel inside the combustion chamber with inlet and exhaust valves closed.The pops and bangs are fuel being ignited by the wasted spark from the MBE
take away the fuel or the wasted spark = no more pop and bang
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