Finally my own build thread
07-10-2008, 01:00 AM
#41
Its actually not that bad if you have the right air tools, and some time to kill while waiting for other mods to come in....
there are lots of reasons to go that route over a vf39, first of all the spool: on a ported td04 like that, spool is ridiculously fast. auto-x guys can appreciate that. the flow also gets a tad better, making the turbo a bit peppier up top and not fall flat on its as as violently as it does on a stock wrx.
I actually considered a vf39 or better yet, a vf34 on a miata, but changed my mind: they are 3-4 times more expensive, the 39 will be considerably laggier, and the 34 way too expensive altogether: used they go for like 500-600. With a ported td04 u get the best of both worlds: good spool, enough power, and most of all: cheap.
there are lots of reasons to go that route over a vf39, first of all the spool: on a ported td04 like that, spool is ridiculously fast. auto-x guys can appreciate that. the flow also gets a tad better, making the turbo a bit peppier up top and not fall flat on its as as violently as it does on a stock wrx.
I actually considered a vf39 or better yet, a vf34 on a miata, but changed my mind: they are 3-4 times more expensive, the 39 will be considerably laggier, and the 34 way too expensive altogether: used they go for like 500-600. With a ported td04 u get the best of both worlds: good spool, enough power, and most of all: cheap.
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07-10-2008, 07:12 AM
#42
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hmm, maybe i'll think about it once I get tired of the present setup.
m2cupcar: did you notice the deep "dish" that the turbine wheel and the wastegate flapper are set in, compared to some other garretts and even the Greddy turbo? i guess that's what prevents the loss of significant flow at lower exhaust flow rates. the subaru people have been using this with good results for up to 10-15 psi, even the STi (which runs around 12 psi stock) has the same type of downpipe, and that turbo spools by 2000 rpm.
But yeah, I agree, a bellmouth wouldn't have hurt in any case. Anyway, today's the big day, let's see what the results are.
m2cupcar: did you notice the deep "dish" that the turbine wheel and the wastegate flapper are set in, compared to some other garretts and even the Greddy turbo? i guess that's what prevents the loss of significant flow at lower exhaust flow rates. the subaru people have been using this with good results for up to 10-15 psi, even the STi (which runs around 12 psi stock) has the same type of downpipe, and that turbo spools by 2000 rpm.
But yeah, I agree, a bellmouth wouldn't have hurt in any case. Anyway, today's the big day, let's see what the results are.
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07-10-2008, 10:20 PM
#43
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Alright guys, ITS DONE!!!
Got the lower downpipe welded by a muffler shop (so much faster), but the idiot did put a crush bend in there when I told him not to. Ah well, its not bad, just not what I'd like to see in an exhaust.
There's still a small leak near the upper/lower DP junction, I need to get one of those stepped band clamps like the turbo tony DP uses. Also my LC1 isnt hooked up.
But that didn't stop me from hooking up the laptop, loading up a safe (rich, but not pig rich) map, and going for a ride.
here's the result:
Comments???
Got the lower downpipe welded by a muffler shop (so much faster), but the idiot did put a crush bend in there when I told him not to. Ah well, its not bad, just not what I'd like to see in an exhaust.
There's still a small leak near the upper/lower DP junction, I need to get one of those stepped band clamps like the turbo tony DP uses. Also my LC1 isnt hooked up.
But that didn't stop me from hooking up the laptop, loading up a safe (rich, but not pig rich) map, and going for a ride.
here's the result:
Comments???
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Now get that WB hooked up and have fun tuning for the next 6 months 
07-13-2008, 08:29 PM
#47
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UPDATE:
car has been running fine for the past 4 days. Its really rich and running retarded timing (got 18 or 19 mpg
) because the damn band clamp is in transit from NAPA and there's no real sense in hooking up the LC1. But the power is just awesome!! The turbo has COMPLETELY transformed the character of the car, its way, way better this way.
So I went ahead and invested in a set of nice wheels: Can anyone guess what wheels these are??? HINT: its a staggered size front and rear.
car has been running fine for the past 4 days. Its really rich and running retarded timing (got 18 or 19 mpg
) because the damn band clamp is in transit from NAPA and there's no real sense in hooking up the LC1. But the power is just awesome!! The turbo has COMPLETELY transformed the character of the car, its way, way better this way. So I went ahead and invested in a set of nice wheels: Can anyone guess what wheels these are??? HINT: its a staggered size front and rear.
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07-16-2008, 10:22 AM
#57
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Congratulations pipefather :-) Nice build you have there. If its a B6 the td04 isn't a bad choice. If it's BP its a bit on the small side. Now it's up and running you can swap bits in and out pretty easily anyway.
Fred.
Fred.
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07-16-2008, 01:58 PM
#58
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thanks fred. looks like its holding 7 psi boost right up to the redline, even untuned. its funny i'm even hitting 7 psi at the manifold because that's supposedly the wastegate opening pressure. So I have 0 psi intercooler pressure drop then??
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07-16-2008, 02:12 PM
#59
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Well, I measured the "pressure" of my wastegate via spring rate and compression etc etc and got 18.2, on the car I saw 17 - 17.5 at the manifold at full boost, but 3.5psi with the gate wide open. Most likely your gate is slightly stiffer than it says to account for coolers etc. Also, the lower your boost the closer to exhaust pressure you are at etc and the more likely you are to get exactly the gate pressure at least at the turbo side of the cooler. Your cooler is a decent size, I wouldn't expect too much drop from it on a B6.
disclaimer : I'm no expert, just opinionated as all hell ;-)
are there some videos for a car starved kiwi stuck in england?
Fred.
disclaimer : I'm no expert, just opinionated as all hell ;-)
are there some videos for a car starved kiwi stuck in england?
Fred.
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