What BHP gain will i get from these ????

[locin78]

So basicly there is no point to these mod's then? so when i asked on here which mods to get some bhp gain ect i was told the filter. the exhaust pluss to de-cat it ect ect and now i have them am told there is no gain but a loss in bhp . so people need to stop talking sh!t and stop giving people the wrong advice!! thanks for the replys and info. Nic

[locin78]

finaly someone with something posative to say thanks now i dont feel so bad for spending so much money lol . Nic

[justalex81]

Code: [Select]

http://www.golfgtiforum.co.uk/index.php?topic=129025.0
this is the defining thread on it. I'm doing the air box mod with a cold air feed

[gtigolfthree]

The fact is the 2.0l 16v engine is already highly tuned and unless your willing to spend spend spend then forget about airbox and exhaust mods.

[Paul86S2]

You can get some gains by some of these mods.

A couple of BHP from the airbox mod, maybe from an induction kit if it is isolated from the engine bay and has a cold air source.

A couple of BHP from a new exhaust if your old one is coked up, same from a decat if your cat is old and partially clogged.

Take the ramps out of your throttle body for a couple more bhp. 4 bhp from a chip.

Theres a "possible" 10 to 12 bhp for you. You'll also have saved about 10 to 12 kg's of weight with the decat and new exhaust.

If increasing bhp from a normally aspirated engine was cheap and easy then everyone would be doing it.

If you want to go further match port your inlet and exhaust manifolds, get a ported and polished head, some mild cams, and get it mapped on a rolling road.

I bet most people who posted on this topic have an aftermarket exhaust

Paul

[Paul86S2]

Tests done on cgti showed an increase of 6 bhp and 9 lbs/ft torque with a properly modified airbox over a standard airbox.

This was coupled with a ported throttle body on both.

Paul

[hammerdrew]

Ok.. im gonna stick my neck on the line here......... 

If you shell out well earned sheets for say a Full system exhaust, inducton kit, ECU chip stage 1 (as these are the standard mods anyway) then i reckon you will be looking at around £800 for ROUGHLY 10bhp! Given the price you paid for your MK3 too, say £800-£900 roughly for a half decent one with 100k on the clock and you've got £1600-£1700.... May as well just go buy the VR and be done with it  As already said, unless you wanna spend spend spend, then forget it! They are highly tuned anyway.. and if taken care of can be lots of fun anyway  HAHAHA

Just my opinion....... Anyone else agree?

[mumbles]

Ok.. im gonna stick my neck on the line here......... 

If you shell out well earned sheets for say a Full system exhaust, inducton kit, ECU chip stage 1 (as these are the standard mods anyway) then i reckon you will be looking at around £800 for ROUGHLY 10bhp! Given the price you paid for your MK3 too, say £800-£900 roughly for a half decent one with 100k on the clock and you've got £1600-£1700.... May as well just go buy the VR and be done with it  As already said, unless you wanna spend spend spend, then forget it! They are highly tuned anyway.. and if taken care of can be lots of fun anyway  HAHAHA

Just my opinion....... Anyone else agree?

  i would agree, although running cost and insurance are a possible argument against your plan 

[Reasty]

In my experience all be it on my mk2 16v fitting a four branch manifold makes a noticable difference to the performance of the car,I can't say it increases bhp but it does substantialy increase the torque to a very noticable degree,it's not a cheap mod but it is one of the best imo. 

[gtigolfthree]

Youve probably hit the nail on the head the gti has got a half decent exhaust as standard it has to to get decent power, the key is to see where vw have tried to save money and as you have identified they couldnt afford a tubular manifold and skimped on a cast one and you probably will get better gains replacing the manifold instead of the exhaust, they are a pain to fit though.