16-08-2012, 11:36 AM
It depends what you want out the car...
If you're looking for a max performance car, yeah - weld the wastegate, I know in a way me and many people disagree on this - I've had various turbos dewastegated, but then I'd never recommend it to someone who uses their car daily and drives it hard... You're likely to melt something unless you're monitoring the engine 24/7 - you're likely to get things very hot...
Everyone will just say "I'll just use the fuel to control the boost" - which yes you can, but that's pretty pointless, you're making the turbo probably produce 28psi or so, when all that's needed for a clean burn is probably 22-24psi - reducing the pumping losses of the engine, exhaust backpressure, charge temperatures, cooling system load blah de blah... It'll go well, but you could spend 2 hours more sorting out a wastegate and do it properly from day one - yes, tractors, combines, trucks etc don't have wastegates, but they also have turbochargers the size of small houses with massive A/Rs which keep backpressure down... They don't just stick a turbo on then tune it, they tune the turbo with regards to it's housings, wheel sizes, trims etc all in with the injector pump calibration all to work reliably from the factory... Welding the wastegate shut on a random turbo with some injector pump with a massive pump element wanged on injecting fuel all over the place is a recipe for damaging things...
We all do it - I'm mad for a good 11mm injector pump that bogs out, coals like feck off boost, but some people have different uses for their cars and in total honesty, sometimes don't have the most amount of mechanical sympathy when it comes to cars... When you see random people coming on the forum with stock bosch pumps saying "Yeah, I welded the wastegate shut and she goes now because someone on 306oc said it was OK to" then wonders why the head is warped to high heaven after their stint to 130mph up a hill in the middle of summer with the bonnet lining off and a stock exhaust with a 1.4 backbox on - that's when people are just going to shag their engines lol...
Some use it to get to work every day, others use it as a their hobby, a toy almost to tune and laugh when it breaks...
If you're looking for a max performance car, yeah - weld the wastegate, I know in a way me and many people disagree on this - I've had various turbos dewastegated, but then I'd never recommend it to someone who uses their car daily and drives it hard... You're likely to melt something unless you're monitoring the engine 24/7 - you're likely to get things very hot...
Everyone will just say "I'll just use the fuel to control the boost" - which yes you can, but that's pretty pointless, you're making the turbo probably produce 28psi or so, when all that's needed for a clean burn is probably 22-24psi - reducing the pumping losses of the engine, exhaust backpressure, charge temperatures, cooling system load blah de blah... It'll go well, but you could spend 2 hours more sorting out a wastegate and do it properly from day one - yes, tractors, combines, trucks etc don't have wastegates, but they also have turbochargers the size of small houses with massive A/Rs which keep backpressure down... They don't just stick a turbo on then tune it, they tune the turbo with regards to it's housings, wheel sizes, trims etc all in with the injector pump calibration all to work reliably from the factory... Welding the wastegate shut on a random turbo with some injector pump with a massive pump element wanged on injecting fuel all over the place is a recipe for damaging things...
We all do it - I'm mad for a good 11mm injector pump that bogs out, coals like feck off boost, but some people have different uses for their cars and in total honesty, sometimes don't have the most amount of mechanical sympathy when it comes to cars... When you see random people coming on the forum with stock bosch pumps saying "Yeah, I welded the wastegate shut and she goes now because someone on 306oc said it was OK to" then wonders why the head is warped to high heaven after their stint to 130mph up a hill in the middle of summer with the bonnet lining off and a stock exhaust with a 1.4 backbox on - that's when people are just going to shag their engines lol...
Some use it to get to work every day, others use it as a their hobby, a toy almost to tune and laugh when it breaks...
