Faster in the long run 14b or T28

[2GturboTALON]

Ok guys i have a problem. I found a local guy selling a 14b for like $60 bucks and also a guy selling a T28 for $350. I know with the 14b im gonna need the RRE hacker tweaker kit for a good install. And for the T28 i wont need much but new crush washers and a new oil line. I want to know though which one can i go farther with. At the least my goal is a 13 second daily driver.

 

[andymoraitis]

Both have the capacity go easily meet your goals, but the T-28 will do so more easily and it's a direct fit. That's the route I'd go.

 

[Ultimatedsm]

The T-28 outflows the 14B, so go with the T-28 if your going to choose those two turbos. The 14B flows around 405 CFM where the T-28 flows around 480-500 CFM.

 

[Ultimatedsm]

T-28 isn't that small internally, still larger then the 14B TDO5, It will be a big difference between the T-25 and the T28 thats for sure. You will gain around 25-30 HP at the same boost level without modifying anything else.

 

[CanadianTSi]

While the T-28 may outflow the 14b on paper, real life results seem to show the opposite.

As stated both turbo's will easily take you deep into the 13's but the T-28 would be the easier install.

 

[WRX19]

ya, for his setup a T28 would be best choice, for simple ease of installation

 

[TooFastTooG]

Hey guys, no to hijack but I had a quick question about the t-28. But this may help out with his decision too.

Is it true that although you see an average of 25-30hp increase with the t-28. You actually have to turn the boost down if your still running the stock fuel system?

 

[2gGSX]

On stock intercooler and fuel system I ran the turbo to 28 lbs/min airflow with no knock.

If you look here http://72.14.209.104/search?q=cache...map&hl=en&gl=us&ct=clnk&cd=1&client=firefox-a
you'll eventually get a link to http://img33.imageshack.us/my.php?image=t2560trim2kw.gif which supposedly is the DSM T25 flow map, showing a max flow of a whopping 22 lbs/min. This is more or less average from the figures other people have had with dyno runs and logs (max of around 220-230 whp). Thus the 6 lbs/min jump would definitely net at least a 25-30 hp increase.

As a note, my figures were from running the turbo at 16 psi and I have the logs to prove it (although there was knock in the upper range, which according to some calculations was my stock fuel pump running out of steam).

 

[pboglio]

Having run both turbos, I'm gonna disagree. A T28 has a 50-60 h.p. advantage over a 14b. Highest datalogs I've seen of a 14b show right around 31 lb/min max. Most tuned T28 runs I've seen including my own were right around 36-37 lb/min. This is just about what you'd see on the respective compressor maps. A T28 is a mid 12 second turbo even in a FULL weight 2G AWD.

 

[Ultimatedsm]

Well like I said before the T-28 flows around 480-500 CFM VS the 405 CFM the 14B does. However, if you port the 14B, it can flow around 450 CFM which can yield close to the T-28's results. However, no matter what, the T-28 will always have the edge on the 14B in performance, but the 14B has a different edge over the T-28.....price.

 

[daren_p]

On stock intercooler and fuel system I ran the turbo to 28 lbs/min airflow with no knock.

If you look here http://72.14.209.104/search?q=cache...map&hl=en&gl=us&ct=clnk&cd=1&client=firefox-a
you'll eventually get a link to http://img33.imageshack.us/my.php?image=t2560trim2kw.gif which supposedly is the DSM T25 flow map, showing a max flow of a whopping 22 lbs/min. This is more or less average from the figures other people have had with dyno runs and logs (max of around 220-230 whp). Thus the 6 lbs/min jump would definitely net at least a 25-30 hp increase.

As a note, my figures were from running the turbo at 16 psi and I have the logs to prove it (although there was knock in the upper range, which according to some calculations was my stock fuel pump running out of steam).

As a reference 22lb/min is low flow for the t25, when I asked around and from personal logs, I saw 25 lb/min at 16 psi.

 

[Ultimatedsm]

You said 13 second car. Well your car can be a 13 second car but you can be a 14 second driver. Maybe you should aim for a certain trap speed which translates to how much horsepower your making. For example, if your trapping around 104-106mph your making 260-280WHP roughly with a full weight car. To get that kind of power, it will be easier with a T-28 compared to a 14B. I am not saying its really hard to trap that high with a 14B, its just easier with a T-28 because its flows more at the same PSI of boost.

 

[2gGSX]

As a reference 22lb/min is low flow for the t25, when I asked around and from personal logs, I saw 25 lb/min at 16 psi.

Noted, and thank you for the extra input since I wasn't sure how accurate that flow map was (since it's drawn and all). However, a 3 lbs/min increase still corresponds to about a 30 hp increase. Bench racing at its finest