20B Turbo Recommendation
Gents,
I am looking for a recommendation for my 20B build. The car has been designed and built for street purposes, nothing too exotic. D series with fresh rebuild, new rotor housings, full coatings, and a street port. The manifold has been exude honed and the throttle body has been enlarged. The engine is being managed by a Tec3R. The fuel and cooling will be matched accordingly. My builder is recommending a GTX4202, he says this turbo will offer the best combination of performance and streetability. Any thoughts? I hope all is well. Cheers, Steven |
Size wise hes about right, depends on what sort of Hp your chasing
|
I would like to see 650-800 HP, but that doesn't mean its realistic. That being said, I am looking for maximum performance within the bounds of reliability and streetability.
Thank you for the feedback. Cheers, Steven |
Bw s380 or s375. Im taking the s380 route which is a t4 frame turbo. Im shooting for 550 whp but want room to grow in the future if need be.
|
Given the power levels your looking at and assuming your porting etc is up to the task your going to be looking at something along the lines of
holset hx55, holset hx60 BorgWarner s400sx4 GT4202 anything within that ball park HX55 on a large extended port running 20psi should have you on song around 4000rpm and punching 700hp at the wheels |
i'd go for the gtx4294 with a 1.05 or so exhaust. I roadrace this turbo with a 1.15 exhaust and its building rpm/boost fast at 3500 rpm. It makes 740 whp at 19 psi. With a 1.00 it should be perfect for the street.
|
I run the GT4202R with the Tial 1.01 v-band housing on my personal street 20B FD.
Really any turbo in this frame size will give you a huge amount of power with similar spool times on the 20B. The exhaust system and manifold will be the variables that have large effects on the performance of the turbo that you choose. You can't go wrong with the GTX42 or GT42RS |
Gents,
Thank you for the feedback. Sounds like I should go with what my builder recommends, which is always a good thing, but I like to do my homework. P.S.- anyone know someone who is looking for a Hogan's Racing manifold? It is a semi-p manifold. I originally bought it to be used with my 20B but it is meant for a race car (no ps or ac). Since this is a street car I opted to keep the creature comforts. I hope all is well. Cheers, Steven |
Any pics and price on the manifold?
|
I would recomend Precision PT7675 CEA. I run journal bearing and it is very nice on the street. Hits 15psi at 3800rpm on 5th gear. 640 Whp (696 engine Hp) at 15psi with a restrictive 3" exhaust. It is very neat and easy to "low-mount" if you dont want the turbo to be the first thing the cops look at when they pop the hood.
http://www1.garaget.org/archive/2/16...15-3107479.jpg |
I am running a B/W S366. I have been very happy with the cost vs performance. It cost me about 700.00 and I dynoed 550 RWHP at 15 psi.
|
BW S478 OR 480, my s478 did 670hp at 15lbs.
|
wouldnt think you would need to go that nig for those goals, have you looked into a gt4094r?
|
Getting a good turbo for the 20b is tough in the sense that in order to get a decent sized hot side, you pretty much have to accept a giant huge compressor housing as part of the package which is a PITA.
That PT turbo isn't to bad, but looking at the specs, it could stand to be bigger on the hotside. I looked at some of the boutique turbo companies and they could do some custom work to make something with the rotary requirements in mind but the price was more than the off the shelf hks/greddy options, which give a decent hot side with a healthy turbine side. |
3 Attachment(s)
Originally Posted by hsmidy
(Post 11657537)
Any pics and price on the manifold?
Attachment 649020 Attachment 649021 Attachment 649022 Please let me know if you have any questions, thank you. V/R, Steven |
Originally Posted by Maxthe7man
(Post 11700664)
Getting a good turbo for the 20b is tough in the sense that in order to get a decent sized hot side, you pretty much have to accept a giant huge compressor housing as part of the package which is a PITA.
That PT turbo isn't to bad, but looking at the specs, it could stand to be bigger on the hotside.
Originally Posted by racingdriver
i'd go for the gtx4294 with a 1.05 or so exhaust. I roadrace this turbo with a 1.15 exhaust and its building rpm/boost fast at 3500 rpm. It makes 740 whp at 19 psi. With a 1.00 it should be perfect for the street.
~S~ |
Originally Posted by Zero R
(Post 11702246)
It's the same turbine as the 42R 82mm inducer 75mm exducer. It runs a .96 A/r versus say a TiAL 1.0 and there is no need to run a bigger turbine housing for 600+whp Now if he is set on getting closer to the 800whp mark it will become a issue.
~S~ I am going to try a vband 1.2 a/r hot side, goal is 750-850 rwhp. |
Originally Posted by Maxthe7man
(Post 11702941)
I am going to try a vband 1.2 a/r hot side, goal is 750-850 rwhp.
~S~ |
Originally Posted by Zero R
(Post 11704598)
This should work well depending on the turbine size.
~S~ Its replacing a T88-34d, with the v band adapter on a one off manifold. It fit perfectly, it almost sits in the same position as the FD T51rkai kit on a 13b. The downpipe and charge piping was 1/2" off on both from the 2 rotor. COMPRESSOR: -Wheel: 56 Trim, 80.8mm Inducer/ 108.0mm Major -Housing: Anti-Surge 4.00" (100mm) Inlet / 3.00" (80mm) Outlet TURBINE: -Wheel: 85 Trim - 87mm Major / 80.2mm Exducer -Housing: 99.1mm V-band Inlet / 115.5mm V-Band downpipe discharge -A/R: 1.20 |
All times are GMT -5. The time now is 03:55 AM. |
© 2024 MH Sub I, LLC dba Internet Brands