getting a turbo

bmwm3guy · Post by **bmwm3guy** » October 27th, 2005, 5:15 pm

Pri-T-tite wrote:Hey so if I get a turbo from the junk yard or something I can just get a manifold and intercooler welded to fit, right.

yup

Pri-T-tite · Post by **Pri-T-tite** » October 28th, 2005, 7:04 pm

could someone give me a list of the parts i will need to completely build my own turbo. I already have a turbo and manifold

fieromx3 · Post by **fieromx3** » October 28th, 2005, 7:08 pm

BOV, oil lines to the turbo, IC(optional but very recomended), wastegate if external, downpipe, if external wastegate boost control i think, IC piping, couplers, all fittings and little acc.
i know there is more so plz add on to this

Pri-T-tite · Post by **Pri-T-tite** » October 28th, 2005, 7:18 pm

what is BoV. the vacuum

fieromx3 · Post by **fieromx3** » October 28th, 2005, 7:26 pm

BOV- blow off valve
a blow off valve is connected to ur intake pipe. when ur floorin ur car ur turbo is makin boost and when u let ur foot off of it there is still pressure in ur intake and u do not want all that boost left in there with ur foot of the gas so ur blow off valve takes that boost and vents it to the atmosphere in a pshhhh sound. a BOV can also make ur turbo last longer, work more efficient and u get that kool pshhhh sound!

Pri-T-tite · Post by **Pri-T-tite** » October 28th, 2005, 7:51 pm

hey thanks for the help so far

babyblueMX3 · Post by **babyblueMX3** » October 29th, 2005, 7:30 am

fieromx3 wrote:BOV- blow off valve
a blow off valve is connected to ur intake pipe. when ur floorin ur car ur turbo is makin boost and when u let ur foot off of it there is still pressure in ur intake and u do not want all that boost left in there with ur foot of the gas so ur blow off valve takes that boost and vents it to the atmosphere in a pshhhh sound. a BOV can also make ur turbo last longer, work more efficient and u get that kool pshhhh sound!

you got the general idea of it but it's not quite that

when you boost, there a big pressure in the intake piping, but when you shift or let of throttle, the throttle body plate closes but the compressor keeps turning ! so the air will try to come back on the opposite direction (agaist the compressor wheel) so that's why this bov is in place so you can release the pressure. In the first case, the compressor will drop the velocity it's turning when when you'll come back in gear it's going to take more time to hit peak boost and you can damage your compressor..
Bottom line if you are boosted you need a bov or by-pass (instead of dumping the air to atmosphere it's plumb back into the intake)

fieromx3 · Post by **fieromx3** » October 29th, 2005, 11:25 am

thats what i actually meant srry if i didnt word it right cuz i know u dont want all that pressure goin back i knew its not good for the turbo but i didnt know it would damage the compressor wheel that 1 i just learned. well thx for cleanin the wordin up though

fieromx3 · Post by **fieromx3** » October 29th, 2005, 11:27 am

also bov's do vent it to the outside but some ppl make it that all the air goes back into the intake insted of outside

babyblueMX3 · Post by **babyblueMX3** » October 29th, 2005, 11:36 am

fieromx3 wrote:also bov's do vent it to the outside but some ppl make it that all the air goes back into the intake insted of outside

yeah that's what I was talking about at the end of my last post. It's called a bypass valve

Pri-T-tite · Post by **Pri-T-tite** » October 31st, 2005, 4:42 pm

hey i have a damaged turbo. this guy told me its vacuum ?(something)? needs to be replaced does anyone know what he is talking about

babyblueMX3 · Post by **babyblueMX3** » October 31st, 2005, 8:42 pm

vacuum ? nothin in a turbo is called vacuum .. there's a fitting on some turbos that has a vacuum fitting. not sure if it's that he's talking about

Pri-T-tite · Post by **Pri-T-tite** » October 31st, 2005, 9:57 pm

i think he said it had something to do with the external wastegate.

babyblueMX3 · Post by **babyblueMX3** » October 31st, 2005, 9:58 pm

well if the turbo has a wastegate external then what's the problem with the actual turbo ? the wastegate is not even on there unless you meant internal wastegate

Pri-T-tite · Post by **Pri-T-tite** » October 31st, 2005, 10:34 pm

sorry internal. fat fingers or something