powermad

so why do the stock turbos come wastegated? wow thats not a bad deal! so how were you able to push the turbo to 500 hp cant a tubo only andle so much force with or with out a wastegate? i thought wastegates just prevent barking?

97 D-Tec

i mean i asked engineered diesel and they said you dont really need an external one unless your runing a ton of boost

RowJ

Wastegates prevent overspooling and overheating. I was able to push the truck to 500 hp while keeping the turbo inside it's map... at 42 psi.
Without my external WG, I was at 62 psi at 500 hp and losing power. The reason for this is the boosted air coming from the turbo was overheated.
The higher boost #'s were from expansion pressure (due to heat) as opposed to compression pressure.
Most factory turbos can't do this because they can not 'waste' as much exhaust gas as an external WG!
I was still a bit overfueled, with the smoke not totally clearing up. But the WG kept EGT's as low as possible and protected the turbo from over reving and from over heating.
Worked well and saved some money..... till I added even more fuel.

RJ

powermad

i can get my egts up to 1600 degrees with my edge box and injectors my boost only goes to 42 max but do you think thats too much for a 58mm turbo thats non wastgated? thanks for the help

Ph4tty

Blow off valves help with barking, wastegate is different. Turbos come with wastegates so that they can run a tight housing for good spool and still flow more air around the turbine. Best of both worlds- good spool and no choke or turbo overspeed.

powermad

so all and all is it worth me getting one or should i look into a bov

Ph4tty

Is the turbo overboosting/ overheating or barking?

atc250r

A wastegate and a BOV both serve different purposes. Its not an either/or situation in my book. A wastegate is to limit boost to within the turbo's operating map. A BOV is to release the extra air from the intake tract when you close the throttle.

John

powermad

i dont know if im overboosting it but i was told that the ball bearing turbos are fairly fragile thats why i was thinking about somthing like a wg or bov. wich would i benifit more from and will protect my turbo most?

97 D-Tec

what is turbo barking?

logskidder

Its what they do before you feed them in the morning

97 D-Tec

ha ha... no seriously whats turbo barking

Ph4tty

Barking is when you let off quickly the boost comes back through the turbo causing the turbo to stall causing the barking sound.

97 D-Tec

does it sound like a lil dog barking cause if so.. i think im introuble

powermad

you will hear the noise when you let off under heavy throttle. its not so much that your in trouble its just you need to ease off the throttle