t4 borg s475 power on 5.3 or 4.8
04-06-2017, 02:26 PM
#1
t4 borg s475 power on 5.3 or 4.8 Ok so I did some work for a guy and was given a S475 T4 turbo with divided housing. It has a 74.5 mm comp wheel and a 83mm exhaust wheel with a 1.00ar and a t4 flange. So will this work well with a small ci 5.3 /4.8 engine? What can it make for boost and power. This might go on a auto 2000 camaro. Any good advise is helpful. As most of you know i'm a big ci Nitrous guy.
04-06-2017, 08:35 PM
#6
No several people have done it with the standard 1.10 housing most of them come with. I seriously doubt a 1.0 housing is going to choke it that much more than the 1.10 or even the 1.24. The 83 turbine will be your limiting factor. But for 750 whp it will flow more than enough air. Regardless of housing size.
04-06-2017, 08:57 PM
#7
Restricted User
People have made more than 750 wheel with turbos that have an even smaller turbine.
Not all housings with the same A/R are equal. You can effectively double the housing size and keep the same A/R if done right, since it is a ratio and not a measurement.
My S475 with a 1.10 A/R T4 was making huge power at 26-28 PSI on a 5.3.
I had them upgrade me to a billet 80mm and they sent it back with a smaller 1.00 A/R turbine. I bet I would still have no issues making 800whp. If I want more, its $150 to swap to the 1.25 A/R.
Not all housings with the same A/R are equal. You can effectively double the housing size and keep the same A/R if done right, since it is a ratio and not a measurement.
My S475 with a 1.10 A/R T4 was making huge power at 26-28 PSI on a 5.3.
I had them upgrade me to a billet 80mm and they sent it back with a smaller 1.00 A/R turbine. I bet I would still have no issues making 800whp. If I want more, its $150 to swap to the 1.25 A/R.
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04-07-2017, 10:39 PM
#8
I love my S475/T4/1.10AR on my low compression 4.8. It freaking hauls *** now that a buddy has helped me dial in my tune. About to get my alky control kit going and tune above 16psi. These little motors love RPM, and they love boost. I wouldn't be stressed over the 1.00AR housing to be honest.
02-15-2018, 10:02 AM
#12
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No several people have done it with the standard 1.10 housing most of them come with. I seriously doubt a 1.0 housing is going to choke it that much more than the 1.10 or even the 1.24. The 83 turbine will be your limiting factor. But for 750 whp it will flow more than enough air. Regardless of housing size.
Anyone in here try the 83mm t6 s475 on a merged set up? Wondering how it would behave on something like the hooker turbo manifold kit. I' on the fence t6 83 or t4 83
02-15-2018, 10:19 AM
#13
Restricted User
02-15-2018, 10:51 AM
#15
Twin scroll is designed for a twin scroll manifold. Which you won’t have, so no advantage to go that way… no real disadvantage either if it’s cheaper.
IMO T4 is for smaller engines or twins. T6 housing is what you want on any of the LS stuff. (even the 4.8) I started with the 1.10 T4… then went to the 1.25, Then went with the larger 87/96 wheel in my 1.25 T4… Finally went to 1.32 T6 and wish I would have started with the T6…
More power, less back pressure, and it spools within a couple hundred RPM of the T4. Aside from space constraints… I don’t see why anyone would want a T4 on a V8. I’m looking at the 1.58 T6 housing now… Lag is *mostly* tune and part combo related… My JY 4.8 will spool the T6 S480 just fine.
IMO T4 is for smaller engines or twins. T6 housing is what you want on any of the LS stuff. (even the 4.8) I started with the 1.10 T4… then went to the 1.25, Then went with the larger 87/96 wheel in my 1.25 T4… Finally went to 1.32 T6 and wish I would have started with the T6…
More power, less back pressure, and it spools within a couple hundred RPM of the T4. Aside from space constraints… I don’t see why anyone would want a T4 on a V8. I’m looking at the 1.58 T6 housing now… Lag is *mostly* tune and part combo related… My JY 4.8 will spool the T6 S480 just fine.
02-15-2018, 08:18 PM
#18
Twin scroll is designed for a twin scroll manifold. Which you won’t have, so no advantage to go that way… no real disadvantage either if it’s cheaper.
IMO T4 is for smaller engines or twins. T6 housing is what you want on any of the LS stuff. (even the 4.8) I started with the 1.10 T4… then went to the 1.25, Then went with the larger 87/96 wheel in my 1.25 T4… Finally went to 1.32 T6 and wish I would have started with the T6…
More power, less back pressure, and it spools within a couple hundred RPM of the T4. Aside from space constraints… I don’t see why anyone would want a T4 on a V8. I’m looking at the 1.58 T6 housing now… Lag is *mostly* tune and part combo related… My JY 4.8 will spool the T6 S480 just fine.
IMO T4 is for smaller engines or twins. T6 housing is what you want on any of the LS stuff. (even the 4.8) I started with the 1.10 T4… then went to the 1.25, Then went with the larger 87/96 wheel in my 1.25 T4… Finally went to 1.32 T6 and wish I would have started with the T6…
More power, less back pressure, and it spools within a couple hundred RPM of the T4. Aside from space constraints… I don’t see why anyone would want a T4 on a V8. I’m looking at the 1.58 T6 housing now… Lag is *mostly* tune and part combo related… My JY 4.8 will spool the T6 S480 just fine.
02-16-2018, 08:43 AM
#20
The compressor housings are the largest part and they are the same size.
The T6 housing may have been a .75” larger all around than the T4. I could see how routing a 5” downpipe could be very difficult in a tight spot though. With the LJMS adaptors they have now, dropping it down to 4” is a bolt on affair.
I was so tight on space I had to cut off the huge exhaust flange and weld on 4” Vband to make it work on my car. This literally let me drop in place of my old T4 S400 setup. Same exhaust and all. Just cut off with a sawzall and welded an ebay 4” Vband on it with a mig welder.
The T6 housing may have been a .75” larger all around than the T4. I could see how routing a 5” downpipe could be very difficult in a tight spot though. With the LJMS adaptors they have now, dropping it down to 4” is a bolt on affair.
I was so tight on space I had to cut off the huge exhaust flange and weld on 4” Vband to make it work on my car. This literally let me drop in place of my old T4 S400 setup. Same exhaust and all. Just cut off with a sawzall and welded an ebay 4” Vband on it with a mig welder.