PT88? Gt4202? Gt4708?
Nice.
On http://www.forcedinductions.com/productsborgwarner.htm they say that for $189 they offer a T4 housing...This means I could purchase the 96mm 1.32unit and pay 189 on top and have a T4 housing wrapped around it...hmm...I will give them a call.
Would you guys recommend the 80mm or the 75 compressor? I am not looking to go above 700whp.
Chris
On http://www.forcedinductions.com/productsborgwarner.htm they say that for $189 they offer a T4 housing...This means I could purchase the 96mm 1.32unit and pay 189 on top and have a T4 housing wrapped around it...hmm...I will give them a call.
Would you guys recommend the 80mm or the 75 compressor? I am not looking to go above 700whp.
Chris
the 76 will spool faster but you are going to have to run more boost to get more power..
i think a 80mm turbo is perfect for the 3 rotor.. of course with the right set up
How is the spool with the 1.1/96mm vs the previous 1.32/96mm? How does it compare to the 1.1/83mm wheel?(if you know) And by the spool I mean, at what RPM do you start to see some boost and at what rpm do you see full boost in say...2nd or 3rd gear.
I might go this route, just buy the S475 1.32/96 and get the housing from Mike turbo...if the spool is right.
Thanks...
I might go this route, just buy the S475 1.32/96 and get the housing from Mike turbo...if the spool is right.
Thanks...
then i changed the a/r to 1.10 and it spooled at least 500rpm sooner and then i went with a twin scroll set up(divided t6) and is right on the money.
1st gear and 2nd gear are pointless under WOT but it always starts building boost around 3k
on 3rd gear i will see boost around 3k rpm and i hit full boost around 4500 ish and it doesn't drop until i let go..
Full Member
Joined: Apr 2009
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From: England
they are two different size turbos.. the GT47 is bigger than the s475 but the 475 will spool quicker it also depends if you are using a twin scroll setup,port work, exhaust system..
i paid $399 for a new housing + having it machine to fit my exhaust wheel of 96mm. the BW s480 with the 1.10 a/r has a smaller exhaust wheel at 83mm. the one with the 1.32 a/r has the 96mm.
http://miketurboinc.com/
that's the website.. they will make you whatever you want.
i paid $399 for a new housing + having it machine to fit my exhaust wheel of 96mm. the BW s480 with the 1.10 a/r has a smaller exhaust wheel at 83mm. the one with the 1.32 a/r has the 96mm.
http://miketurboinc.com/
that's the website.. they will make you whatever you want.
but on a 13b, compare a 96mm to a 84mm both with 1.1 A/R would the 84mm spool earlier but restrict top end power?
Last edited by turbotoaster; Jan 7, 2010 at 01:26 PM.
https://www.rx7club.com/spec-tuning-154/how-size-matters-478915/
read that.
i wouldn't run a 80mm turbo in a 2rotor.. the only ppl that i know doing it are ppl that drag race and take off at 7k rpm+ and over 20psi of boost
read that.
i wouldn't run a 80mm turbo in a 2rotor.. the only ppl that i know doing it are ppl that drag race and take off at 7k rpm+ and over 20psi of boost
Full Member
Joined: Apr 2009
Posts: 208
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From: England
i need the turbo to take the european top speed record.
the car will be running 30psi on race gas and will be reving to about 9k
But the car is streetported and this is only to take the record.
Unless you can think of another turbo that will do 700whp on a 2 rotor that will spool faster as i cant find one.
People are saying the bw will outspool a gt4202
the car will be running 30psi on race gas and will be reving to about 9k
But the car is streetported and this is only to take the record.
Unless you can think of another turbo that will do 700whp on a 2 rotor that will spool faster as i cant find one.
People are saying the bw will outspool a gt4202
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
I got a quote from Hong at Miketurboinc.
Originally, the only reason I wanted to go T4 was so I could go 4" straight from the hotside to the exhaust. Hong informed me that he could make the T6 housing into a 4" Vband exhaust, this means I can use a T6 and still have the 4" DP.
Here are the two options he quoted me on:
S475/96x87mm wheel/1.32A/R T6 w 4" V-band - 850.00
S475/96x87mm wheel/1.10A/R T6 w 4" V-band - 1000.00
I say it beats the heck out of even a GT4202 in price with much more flow up top. With a Quick spool valve it should make usable boost way low in the RPM range. I'm leaning towards this, you just cant beat the prices.
any thoughts?
Originally, the only reason I wanted to go T4 was so I could go 4" straight from the hotside to the exhaust. Hong informed me that he could make the T6 housing into a 4" Vband exhaust, this means I can use a T6 and still have the 4" DP.
Here are the two options he quoted me on:
S475/96x87mm wheel/1.32A/R T6 w 4" V-band - 850.00
S475/96x87mm wheel/1.10A/R T6 w 4" V-band - 1000.00
I say it beats the heck out of even a GT4202 in price with much more flow up top. With a Quick spool valve it should make usable boost way low in the RPM range. I'm leaning towards this, you just cant beat the prices.
any thoughts?
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
Part: http://performancemetalwerkz.webs.com/
Price: http://performancemetalwerkz.webs.co...ts/show/676156
I am hoping for a quick boost to 10psi and a nice power band up top.
What do you think?
Chris
With the only difference being the inducer of the compressor wheel (exducer is the same) it means that it'll make more power at the lower boost pressures, without much if any noticeable difference in spool. Usually higher the ratio of the inducer/exducer, more it'll flow at low psi's, I remember that from my friend who used to work at Garrett.
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
Actually I think the same S480 turbo that bewtew runs may be better suited for your goals. It's virtually the same as the $1000 S475 turbo above, but...
With the only difference being the inducer of the compressor wheel (exducer is the same) it means that it'll make more power at the lower boost pressures, without much if any noticeable difference in spool. Usually higher the ratio of the inducer/exducer, more it'll flow at low psi's, I remember that from my friend who used to work at Garrett.
With the only difference being the inducer of the compressor wheel (exducer is the same) it means that it'll make more power at the lower boost pressures, without much if any noticeable difference in spool. Usually higher the ratio of the inducer/exducer, more it'll flow at low psi's, I remember that from my friend who used to work at Garrett.
How is your powerband with the 83mm wheel and the 1.1? When do you start seeing boost in 2nd or 3rd gear? When does the power start falling off? What porting do you have?
Thanks.
Chris
Actually I think the same S480 turbo that bewtew runs may be better suited for your goals. It's virtually the same as the $1000 S475 turbo above, but...
With the only difference being the inducer of the compressor wheel (exducer is the same) it means that it'll make more power at the lower boost pressures, without much if any noticeable difference in spool. Usually higher the ratio of the inducer/exducer, more it'll flow at low psi's, I remember that from my friend who used to work at Garrett.
With the only difference being the inducer of the compressor wheel (exducer is the same) it means that it'll make more power at the lower boost pressures, without much if any noticeable difference in spool. Usually higher the ratio of the inducer/exducer, more it'll flow at low psi's, I remember that from my friend who used to work at Garrett.
look into a twin scroll set up if is not too late.
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
+1
i love my s480 and it doesnt feel laggy at all.. i start seeing boost around 3k and full boost by 4500. i also have a very aggressive street port with a straight through exhaust (only a resonator in the middle) that goes from 5" to 4" to 3.5" with a single bent.
look into a twin scroll set up if is not too late.
i love my s480 and it doesnt feel laggy at all.. i start seeing boost around 3k and full boost by 4500. i also have a very aggressive street port with a straight through exhaust (only a resonator in the middle) that goes from 5" to 4" to 3.5" with a single bent.
look into a twin scroll set up if is not too late.
Ok, so you have me convinced...Now I just have to decide whether my goals justify going with the 80mm compressor or just getting the standard 75mm one.
My exhaust is full 4" and divides into two 4" pipes at the back. It have an Aero Turbine muffler in the middle and two straight through muffler/pipes in each of the pipes after it splits before the tips (its an RX-8). So I should at least have similar restriction to you as the two straight through pipes are 4" in diameter and being that it split from a single 4" pipe it causes little to no back pressure.
The one thing is that I was thinking of going with a mild street port and only with the purpose of not having to breathe through the tiny OEM exhaust ports. This will surely affect spool compared to you but with the Quick Spool Valve i should hopefully gain some of it back.
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
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From: Plymouth, MN
Ok so I have pretty much decided to go with a BW unit, the performance just can't be beat for the price.
I called around and did some math and narrowed it down to two choices. I would like input from you guys.
1st off, the 75mm compressor can supply the air I need to generate WAY more than the power that I want, I could easily get 200whp more than what I am seeking with that compressor. Also, I will be getting the 1.32/96mm hotside and part of the reason is that I will use a "quick spool valve" which should help it spool at least like a 1.10 on the same wheel and this was preferred by bewtew. With that in mind:
- Should I get the S480 with the stock BW cover and 80mm compressor
or
- Should I keep the S475 and get it with the BW race cover.
Both options cost about the same and they both are right in my budget.
I was leaning towards the S475 because I know the smaller compressor will spool quicker, and it has enough air anyways for way more than what I want, not to mention that the race cover has its benefits.
Again, the goals are 5-600whp (not more than 650) at relatively low boost (12-14psi) but with a great power band that doesn't let go until around 8500rpm, hence the larger than needed hot side.
Thanks in advance.
Chris
I called around and did some math and narrowed it down to two choices. I would like input from you guys.
1st off, the 75mm compressor can supply the air I need to generate WAY more than the power that I want, I could easily get 200whp more than what I am seeking with that compressor. Also, I will be getting the 1.32/96mm hotside and part of the reason is that I will use a "quick spool valve" which should help it spool at least like a 1.10 on the same wheel and this was preferred by bewtew. With that in mind:
- Should I get the S480 with the stock BW cover and 80mm compressor
or
- Should I keep the S475 and get it with the BW race cover.
Both options cost about the same and they both are right in my budget.
I was leaning towards the S475 because I know the smaller compressor will spool quicker, and it has enough air anyways for way more than what I want, not to mention that the race cover has its benefits.
Again, the goals are 5-600whp (not more than 650) at relatively low boost (12-14psi) but with a great power band that doesn't let go until around 8500rpm, hence the larger than needed hot side.
Thanks in advance.
Chris
Banned. I got OWNED!!!
Joined: Dec 2007
Posts: 946
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From: paradise Florida
the s475 with the race cover all the way, considering you wont even be using all of it.
that compressor cover is the ****!!
has a high pitch whistling similar to a t51r, but louder, from what i hear.. and of course, it has the potential to give you another 20-30rwhp or so at that boost level..
of course, none of this is first hand experience, its just all relative to what i have read about it.
that compressor cover is the ****!!
has a high pitch whistling similar to a t51r, but louder, from what i hear.. and of course, it has the potential to give you another 20-30rwhp or so at that boost level..
of course, none of this is first hand experience, its just all relative to what i have read about it.
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
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From: Plymouth, MN
Chaotic, that is exactly what I was thinking.
Does any body else have an opinion on which option would be best if picking one? Race cover S475 or normal cover S480?
I am about to pull the trigger on either one of these, the more opinions the better...
Read above for my goals.
Thanks.
Chris
Does any body else have an opinion on which option would be best if picking one? Race cover S475 or normal cover S480?
I am about to pull the trigger on either one of these, the more opinions the better...
Read above for my goals.
Thanks.
Chris
....
Banned. I got OWNED!!!
Joined: Dec 2007
Posts: 946
Likes: 0
From: paradise Florida
maybe this will help you decide.
i hope he doesn't mind me posting this video.
s475 with race cover.
http://www.youtube.com/watch?v=U1WV82hl71s
i hope he doesn't mind me posting this video.
s475 with race cover.
http://www.youtube.com/watch?v=U1WV82hl71s
If it were me I'd run the 475 with the 1.10 on the 96 wheel on a street car. We've done a few 20B's here with very minor port work and all run BB 1.0 4202's both in TiAL and T6 all respond well, all pull till redline and they are making 500whp+ at 10psi Since your running the larger 96mm wheel you should do pretty good. Keep in mind also that a larger turbine wheel can also have a effect on lag the same way a larger compressor can. It's the heavier of the two and getting turbo's spinning on heavy rotating assemblies isn't always easy.
~S~
~S~
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
If it were me I'd run the 475 with the 1.10 on the 96 wheel on a street car. We've done a few 20B's here with very minor port work and all run BB 1.0 4202's both in TiAL and T6 all respond well, all pull till redline and they are making 500whp+ at 10psi Since your running the larger 96mm wheel you should do pretty good. Keep in mind also that a larger turbine wheel can also have a effect on lag the same way a larger compressor can. It's the heavier of the two and getting turbo's spinning on heavy rotating assemblies isn't always easy.
~S~
~S~
http://performancemetalwerkz.webs.co...ts/show/676156
http://performancemetalwerkz.webs.com/
What do you think? If it makes it spool at least close to a 1.1A/R it may be worth it due to the lower back pressure it will have up top compared to the 1.1A/R.
Like many things, the complication might not be worth the improvement but you only know things by trying them....we'll see.
Chris
Thread Starter
Rotary Enthusiast
Joined: Oct 2007
Posts: 799
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From: Plymouth, MN
I ordered it from forced inductions. The price is actually 625.00 and not 599.00 as is on their site but they have sold tons of turbos and people are pretty happy with them so I ordered it there. Shipping is 40.00 so total to my door was 665.00 which for a turbo capable of 1000hp on a piston engine is a ridiculous deal.
I am hoping the quick spool valve will make it behave like a 1.1A/R or similar, should be fun to drive with a nice power band.
Chris
I am hoping the quick spool valve will make it behave like a 1.1A/R or similar, should be fun to drive with a nice power band.
Chris
1000hp Quest
Joined: Jan 2010
Posts: 265
Likes: 1
From: Undicided
Turbo
Hello friends.
I am looking for garret based turbo larger (hotside) than a GT4202 in journal bearing, preferably in T4 divided Ideally a GT4508 T4 would be perfect but it only comes in BB and for budget reasons I cannot justify buying a 3k$ turbo at this time. A gt4202 would be on the small side of things but could meet my goals although I might loose a bit of top end powerband. A GTK1000 is BB, in the budget and will flow enough air for the HP level I want but is too small on the rear end for the powerband I seek from the 20B. A journal GT4708 would be ok and similar in size to a GT4508 but it only comes in T6 unless I go with a precision custom unit, which is still quite a bit above 2k, with a T6 and the larger turbine wheel will hurt my spool. I ran into the Precision Turbo PT88, which has an 88mm inducer compressor, is T4 based but has a turbine between the GT4508 and the GT4708. This turbo is only available in open volute but is significantly smaller and promises enough air for my goals, not to mention its only about 16-1700$. Does any one here have any experience with this turbo in Rotary applications? Should I just go with a GT4202 and call it a day? I know about turbo nomenclature so feel free to bring it with your answers, I also know that I want to stay T4 based and divided if possible. The reason I would prefer Divided is so that I can use a "Quick Spool Valve" of sorts...and T4 because of packaging issues, it is not a racecar, I need to optimize space.
Thanks in advance,
Chris
I am looking for garret based turbo larger (hotside) than a GT4202 in journal bearing, preferably in T4 divided Ideally a GT4508 T4 would be perfect but it only comes in BB and for budget reasons I cannot justify buying a 3k$ turbo at this time. A gt4202 would be on the small side of things but could meet my goals although I might loose a bit of top end powerband. A GTK1000 is BB, in the budget and will flow enough air for the HP level I want but is too small on the rear end for the powerband I seek from the 20B. A journal GT4708 would be ok and similar in size to a GT4508 but it only comes in T6 unless I go with a precision custom unit, which is still quite a bit above 2k, with a T6 and the larger turbine wheel will hurt my spool. I ran into the Precision Turbo PT88, which has an 88mm inducer compressor, is T4 based but has a turbine between the GT4508 and the GT4708. This turbo is only available in open volute but is significantly smaller and promises enough air for my goals, not to mention its only about 16-1700$. Does any one here have any experience with this turbo in Rotary applications? Should I just go with a GT4202 and call it a day? I know about turbo nomenclature so feel free to bring it with your answers, I also know that I want to stay T4 based and divided if possible. The reason I would prefer Divided is so that I can use a "Quick Spool Valve" of sorts...and T4 because of packaging issues, it is not a racecar, I need to optimize space.
Thanks in advance,
Chris
You seam like a cool guy so I am going to give you some help. Go with the PT88 it's everything you are looking for small size and packs big power I made 610hp @ 16 psi and spools like nothing else out der it spools super quick and still hold very strong at high boost 831hp at 27 psi but tire wer spinning at dyno so I think it was more but I put wat dyno said and it's better with single outlet non divided because becuase of the size of turbo it's spools super fast. Won't regret it. You can probably make 600-700 on pump gas around 16-18 psi