Turbo selection
#1
Turbo selection
So towards then end of the month i will be purchasing the turbo for my build. The plan......
1)stock motor until it craps the bed
2)once forged would like 500-700 wheel hp
3)not against buying two different turbos but would like to avoid it
A4 with 3500 stall 3.90 gearing so it will stay in boost once there.
i was worried about a chunk of the doomed ringland(s) getting into the turbo when the motor finally lets go(we all know it will eventually)
so i have been looking at the mpt70 with the .96 ar
http://www.vsracing.net/catalog/prod...roducts_id=812
and the gt4088 special by garrett
http://himni-racing.com/index.php?ma...roducts_id=741
1)should i go with the bigger garrett since it will stay in boost once its there?
2)when should i start seeing boost with either turbos
3)Is it a possibility that crap from the motor letting go will damage the turbo?
4) any other turbo recommendations?
if so i would like to stay journal bearing, would like to keep it cheap if possible this is my first turbo buildup and im trying to avoid destroying a high dollar turbo.
thanks guys.
1)stock motor until it craps the bed
2)once forged would like 500-700 wheel hp
3)not against buying two different turbos but would like to avoid it
A4 with 3500 stall 3.90 gearing so it will stay in boost once there.
i was worried about a chunk of the doomed ringland(s) getting into the turbo when the motor finally lets go(we all know it will eventually)
so i have been looking at the mpt70 with the .96 ar
http://www.vsracing.net/catalog/prod...roducts_id=812
and the gt4088 special by garrett
http://himni-racing.com/index.php?ma...roducts_id=741
1)should i go with the bigger garrett since it will stay in boost once its there?
2)when should i start seeing boost with either turbos
3)Is it a possibility that crap from the motor letting go will damage the turbo?
4) any other turbo recommendations?
if so i would like to stay journal bearing, would like to keep it cheap if possible this is my first turbo buildup and im trying to avoid destroying a high dollar turbo.
thanks guys.
#2
That garrett is a 64.7mm turbo while the MPT70 should be close to a true 70mm turbo.
The MPT70 is cheaper and easily replaceable... if it were me and my final goals werent higher than a T70 can support, then perhaps the MPt70 is a decent choice.
The MPT70 is cheaper and easily replaceable... if it were me and my final goals werent higher than a T70 can support, then perhaps the MPt70 is a decent choice.
#5
#6
I'm facing the same turbo choice decision at the moment, albeit a little different. I was wondering though if you guys can school me on the AR ratio thing in a cliff notes kind of way. I've read some of the tech articles, but none seem to be getting though to me in a meaningful way. I'm VERY well versed in engines, but not in turbo speak.
Background: fully forged 383, TF heads, building headers from 1 7/8 304 stainless. Auto trans to start with a change to M6 as time permits..
Not trying to hijack your thread. My appologies.
Background: fully forged 383, TF heads, building headers from 1 7/8 304 stainless. Auto trans to start with a change to M6 as time permits..
Not trying to hijack your thread. My appologies.
#9
I'd say start out with a T78GTS with the .84 housing. Move up to the .96 later for $200. It's about $1500.
Another option would be the TC76. It's a little smaller so it'll spool better, plus about $500 less.
Mike
Another option would be the TC76. It's a little smaller so it'll spool better, plus about $500 less.
Mike
#10
but my question is would two T70s with a .68 work in a twin turbo app....say on a mildly built 355 or 383
#11
Would a MPT70 with a .96 AR fit on your log manifold setup?
#12
As far as fit though, shouldnt be a problem.
#13
The V-band is standard you just have to cut the tabs on the turbo side to make it fit, its really really simple and took me less than a minute to work on mine. Im using a standard v-band flange on my down pipe and the modified clamp and it works perfectly.
#14
Im sorry I dont want sound stupid, Im new to this turbo stuff, still learning as much as I can. So what your saying is you have to modify the clamp itself to fit the turbine housing exit, and not the turbine housing or DP?
This is the one Im looking at in a .96 AR
http://www.vsracing.net/catalog/prod...roducts_id=812
It shows a 3" V band clamp on that site as well.
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