GTX4202R Tial A/R Size on 20b?
#7
If you are going a semi-port your powerband is going to be more midrange and top end, therefore they suggest bigger a/rs that match that powerband.
Personally I would stick with a medium streetport, the smaller GTX4294R, and a 1.15( or even better the 1.16 Tial Vband) with 4" exhaust. Then if you wanted to make your fabrication life easy you could even get our smaller GT40 compressor housing for the above turbo..
Personally I would stick with a medium streetport, the smaller GTX4294R, and a 1.15( or even better the 1.16 Tial Vband) with 4" exhaust. Then if you wanted to make your fabrication life easy you could even get our smaller GT40 compressor housing for the above turbo..
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#10
That is true but what I wanted to be able to hit 800 rwhp on pump with this setup just because . I even considered the 4508R but I think thats going overboard. I won't be running max at the track, I'd be happy with 600 rwhp just for the track but I'd like to be able to kick it up to 800 by raising the boost just for fun on the street LOL. I was going to use the Haltech P2000 to tune boost by gear so I'm not just spinning tires.
thewird
thewird
#13
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If I were you, I'd run exact turbo as this guys:
https://www.rx7club.com/20b-forum-95/740whp-645wtq-%40-18psi-962042/
the response and hp is documented on the track videos on youtube too.
https://www.rx7club.com/20b-forum-95/740whp-645wtq-%40-18psi-962042/
the response and hp is documented on the track videos on youtube too.
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If I were you, I'd run exact turbo as this guys:
https://www.rx7club.com/showthread.php?t=962042
the response and hp is documented on the track videos on youtube too.
https://www.rx7club.com/showthread.php?t=962042
the response and hp is documented on the track videos on youtube too.
#23
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We've done a few 20B's here, mild street ports with 4202R's on TiAL 1.0 housings. They easily make 500whp around 9-10psi on pump gas. They keep pulling all the way up to 7500rpm which is where we choose to put redline on the street cars. They are responsive with decent low end making 300ft/lbs at or before 4krpm and 400ft/lbs or more at or before 4500rpm. 600whp is easily possible. T6's we've done were also all 1.0's and unfortunately were divided but they are still pretty responsive and make good power they are just big and heavy(46lbs).I'm not sure you need much bigger than a 1.0 for what you are trying to do. You could try a 1.15 but you need nothing bigger for sure. The TiAL is a nice unit combine it with a lightweight back plate and you have a winner for ease of packaging and weight(28lbs). You should be able to get away with a GTX4294 over the older GT4202R just by going off of maps but honestly the 4202's on 20B's running a TiAL 1.0 feel pretty much like 35R's on 13B's. As for the smaller compressor Garrett makes racing units that run machined down GTX4202 comp wheels in various sizes.
~S~
~S~
Last edited by Zero R; 06-19-12 at 05:16 PM.
#25
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If it were me and I wanted a responsive 650whp car at moderate boost levels. I would run a GTX42R/1.0 TiAL housing on a well sorted port designed for torque. The car will feel like a 35R car with better torque if done right. If you plan on truly racing that engine your biggest hurdles will be thermal management (oil/coolant etc) as well as proper build. I would certainly balance and clearance everything on it as well as consider pinning it. Some will say it's not needed most of those never tried running one around a track for extended periods of time at 650whp.
~S~