HKS T51R Kai
02-19-09, 02:42 AM
#1
Junior Member
Thread Starter
Join Date: Dec 2007
Location: MALTA EUROPE
Posts: 18
Likes: 0
Received 0 Likes
on
0 Posts
HKS T51R Kai
Hi Everyone,
I am upgrading my setup, basically I am installing a new 13B-REW engine that can hold up to 500whp, and was thinking of purchasing an HKS T51R Kai. Is anyone using this turbo on here?
This is the spec of this turbo I found:
Compressor:
Exd/Ind: 94.0mm/70.3mm
Trim: 56
Turbine Housing:
Major/Exducer: 82mm/71.4mm
Trim: 76
Turbine A/R:1.00
Also, how much boost does it need to push to generate around 450whp? Some people have told me the turbo might be too big, other said it is good..so I'm asking for everyone's opinion especially those who had experience with this turbo before.
What size injectors would I need? I have bought a set of Sard fuel rails, now the largest injectors by Sard (high impedance) are 850cc. Will they be enough for 450whp, if say the turbo would have to be boosting 20psi? I might sell them if I need to get bigger injectors.
My car has an Apex'i Power FC with Commander too, and will be tuned on a dyno.
Any advice is welcome, thanks in advance
I am upgrading my setup, basically I am installing a new 13B-REW engine that can hold up to 500whp, and was thinking of purchasing an HKS T51R Kai. Is anyone using this turbo on here?
This is the spec of this turbo I found:
Compressor:
Exd/Ind: 94.0mm/70.3mm
Trim: 56
Turbine Housing:
Major/Exducer: 82mm/71.4mm
Trim: 76
Turbine A/R:1.00
Also, how much boost does it need to push to generate around 450whp? Some people have told me the turbo might be too big, other said it is good..so I'm asking for everyone's opinion especially those who had experience with this turbo before.
What size injectors would I need? I have bought a set of Sard fuel rails, now the largest injectors by Sard (high impedance) are 850cc. Will they be enough for 450whp, if say the turbo would have to be boosting 20psi? I might sell them if I need to get bigger injectors.
My car has an Apex'i Power FC with Commander too, and will be tuned on a dyno.
Any advice is welcome, thanks in advance
02-26-09, 11:16 AM
#4
Water Injection Specialist
Join Date: Apr 2003
Location: UK
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
The Gt4294R is very similar to the HKST51R turbo. Take a look at the specs.
T51= Inducer 70.3mm Exducer 94mm and on the turbine side Exducer71.4mm and 82mm Major
GT4294= Inducer 70.3mm Exducer 94mm and on the turbine side exducer 75.2mm and 82mm Major.
So you can see they are very close but the gt42 has a bigger turbine and more rear housing options and it is also divided as opposed to single entry. You can make the power you are looking for around 1.2 bar with this turbo.
T51= Inducer 70.3mm Exducer 94mm and on the turbine side Exducer71.4mm and 82mm Major
GT4294= Inducer 70.3mm Exducer 94mm and on the turbine side exducer 75.2mm and 82mm Major.
So you can see they are very close but the gt42 has a bigger turbine and more rear housing options and it is also divided as opposed to single entry. You can make the power you are looking for around 1.2 bar with this turbo.
Last edited by Erdin; 02-26-09 at 11:20 AM. Reason: was not correct
02-26-09, 12:23 PM
#5
Junior Member
iTrader: (34)
Join Date: Nov 2004
Location: AZ
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
that turbo is overkill for 500whp. go with something smaller that will have better response. with proper tuning you can make that power on a S362(GT35R) around 18-22 psi depending on porting.
03-07-09, 01:17 PM
#6
Senior Member
iTrader: (2)
Join Date: Sep 2007
Location: Germany
Posts: 349
Likes: 0
Received 0 Likes
on
0 Posts
...besides the turbo (as posted before, there are some smaller turbos on the market that can also reach 500hp but are not that laggy like the T51R/GT42), but the more important fact is that the injectors are way too small. 4x850cc are good for around 430 hp with 100% duty cycle, and 1000cc are the biggest injectors the sard fuel rail should accept - i have only read this, but never find evidence to this (an explanation would be fine, if anybody knows...)
...so, perhaps you should buy another fuel rail, and use bosch 1680 on the secondary...
...so, perhaps you should buy another fuel rail, and use bosch 1680 on the secondary...
03-10-09, 06:58 AM
#7
They are very laggy. I haven't come across one on a rotary but they are very popular with Skyline GTRs owners who convert the RB26DETT to run a single T51R. Makes no power below 5k but rips your face off once you go past 6500.
If you just want to make 500rwhp it's overkill, use something smaller.
If you just want to make 500rwhp it's overkill, use something smaller.
Trending Topics
03-10-09, 08:29 AM
#8
Full Member
Join Date: Jun 2008
Location: FLORIDA
Posts: 230
Likes: 0
Received 0 Likes
on
0 Posts
HERE IS LINK TO SOMEONE WHO HAS THE SAME TURBO ON THEIR CAR. This guy is more than happy with the turbo.
http://www.youtube.com/watch?v=GvRVG...eature=related
http://www.youtube.com/watch?v=GvRVG...eature=related
03-11-09, 04:36 PM
#10
Wangan Nasty
Join Date: Apr 2006
Location: Irvine, Southern California
Posts: 1,779
Likes: 0
Received 3 Likes
on
3 Posts
http://www.youtube.com/watch?v=l5YLbvQlSF4
To give you an idea what a rotary on a T51R KAI BB feels/sounds like.
I filmed that video about 6 months back, but i still remember it very vividly. It's not that laggy as it's made to seen.
You can also look into triple ball bearing COMP/Bullseye-Power Turbos if you want a single with awesome response.
To give you an idea what a rotary on a T51R KAI BB feels/sounds like.
I filmed that video about 6 months back, but i still remember it very vividly. It's not that laggy as it's made to seen.
You can also look into triple ball bearing COMP/Bullseye-Power Turbos if you want a single with awesome response.
03-12-09, 09:18 PM
#18
Original Gangster/Rotary!
iTrader: (213)
Anti-surge, typically when a smaller motor runs a larger turbo, the motor can't ingest the air quickly enough, and the air 'backs up' up the compressor wheel, hence the surge.
Anti-surge housings sound cool, but aren't needed for your typical rotary street application. You'll lose a little bit of response, which is why I'm not running one. Although the noise does sound pretty cool
Anti-surge housings sound cool, but aren't needed for your typical rotary street application. You'll lose a little bit of response, which is why I'm not running one. Although the noise does sound pretty cool
02-18-10, 09:52 PM
#19
Can Post Only in New Member Section
Join Date: Feb 2010
Location: Nanaimo, BC
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
just wanna say the t51r ball bearing turbos are not discontinued.
i have a t51r kai on my supra and hks told me over the phone that the ball bearing versions are not discontinued.
as for the kit itself, maybe
i can only describe the sound as a dentist drill and it makes your pants wet on both front and back when you hear it spooling.
noise in my opinion is attributed to the specially designed anti surge housing AND the fact that the housing is made of lightweight inconel (my grandma can do bicep curls with the turbo)
Last edited by agm; 02-18-10 at 09:55 PM.
02-18-10, 09:58 PM
#20
The king of the highway!
iTrader: (2)
Join Date: May 2004
Location: Home of the 305 Boyz(miami)
Posts: 2,988
Likes: 0
Received 0 Likes
on
0 Posts
Honestly even though you can make alot more power on a gt42r than you can with a t51r (yes a gt4202r is bigger) I will forever love the sound that t51r makes. Just cant afford the 5K for a turbo kit
Good luck on your build, ill keep an eye for it
BTW that blue car on youtube is my car ITS A GT42 BUT THE REASON why it spools up so quickly is because of the 4 barrell intake i have on top
P.S. with a street port i hit 430@ 12lbs on a t78 so a t51 should be around 450 @ 12lbs
Good luck on your build, ill keep an eye for it
BTW that blue car on youtube is my car ITS A GT42 BUT THE REASON why it spools up so quickly is because of the 4 barrell intake i have on top
P.S. with a street port i hit 430@ 12lbs on a t78 so a t51 should be around 450 @ 12lbs
02-18-10, 10:11 PM
#21
Can Post Only in New Member Section
Join Date: Feb 2010
Location: Nanaimo, BC
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
im not sure if this information is helpful for rx7's but on 2jz 3 litre engine the t51r kai will make 600whp at around 20 psi and with 264 cams it can do mid to high 600 whp with 600wtq at low 20's psi
spools your head into the seat at just over 5k rpm on the 3 litre.
heres some examples. i apologize if this is way unreletive to rotory
(ah wtf i cant link images, throw these in your browser i guess. its not spam)
20 psi with boost leaking
dynamotorsports.ca/dynographs2/DMTSupraT51RMAFDyno.jpg
21 psi with more mods
dynamotorsports.ca/tempfiles/DMTSupraAEMT51RKAI.jpg
dynamotorsports.ca/tempfiles/DMTSupraAEMT51RKAIBoost.jpg
in my opinion this turbo will be huge and a waste for 500whp. but it sure wont break a sweat to make that power. (on a 2jz anyway. im gonna leave now this rotary stuff is way over my head)
HKS underrated it at 800hp, 80 lbs/min
ive never seen a compressor map for it though and im pretty sure they were never released.
i also believe the garrett equivalent to the KAI is the gt4294r, and the equivalent to the SPL is the gt4202r.
they are very similar and are known to hit more top end, but they lack the HKS secret sauce
get a gtx4294r imo
take care,
spools your head into the seat at just over 5k rpm on the 3 litre.
heres some examples. i apologize if this is way unreletive to rotory
(ah wtf i cant link images, throw these in your browser i guess. its not spam
)20 psi with boost leaking
dynamotorsports.ca/dynographs2/DMTSupraT51RMAFDyno.jpg
21 psi with more mods
dynamotorsports.ca/tempfiles/DMTSupraAEMT51RKAI.jpg
dynamotorsports.ca/tempfiles/DMTSupraAEMT51RKAIBoost.jpg
in my opinion this turbo will be huge and a waste for 500whp. but it sure wont break a sweat to make that power. (on a 2jz anyway. im gonna leave now this rotary stuff is way over my head)
HKS underrated it at 800hp, 80 lbs/min
ive never seen a compressor map for it though and im pretty sure they were never released.
i also believe the garrett equivalent to the KAI is the gt4294r, and the equivalent to the SPL is the gt4202r.
they are very similar and are known to hit more top end, but they lack the HKS secret sauce
get a gtx4294r imo
take care,
Last edited by agm; 02-18-10 at 10:14 PM.
02-18-10, 10:39 PM
#22
Full Member
Join Date: Mar 2009
Location: Stafford, VA
Posts: 79
Likes: 0
Received 0 Likes
on
0 Posts
I have thought this turbo over ever since i got my RX7 and i'm 99% sure that's what i'm going to upgrade too. I'm sure i'll never use that turbo to it's fullest but 420 at 12lbs is good for me as long as i get that sound. it's only money, can't take it with you. might as will throw it away on some BIG dumbass turbo.... thats what i'm going to do. 
02-22-10, 05:15 AM
#25
Senior Member
Join Date: Nov 2004
Location: England
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
ok what ever you say.I have friend who has more or less the same setup as me with a GT42, I outspool him by a couple of hundred RPM, and we make very similar power.
I agree HKS turbos are more expensive and may not be worth the extra money for the earlier spool , but they are in no way no less performant in top end power to a GT42.
You may be a seller of turbos, but you cant make sweeping statements like that, unless you have owned/built high powered rotaries and have run both types of turbos.
People like to see evidendence on real world experiance and results, not theory
In regards to housings, why have TIAL made a rear housing to replace the divided housings on GT42 which is using the same design as the HKS T62/T51Turbos? I guess TIAL and HKS dont know what they are doing
