td05's

[TugVR4]

Im from 3si.org. I also have a awd laser(not modding yet) Can someone run me thru the td05's real quick. My vr4 has tdo4's- Dr650's I run alot of 11.6's at 120-123mph.(little background). Finally we are getting tdo5 headers made for our cars that are reasonable. Believe it or no the 14b matches our engine perfectly(flowcharts)Its not going to be the same on our cars but a generic example would be appreciated. Lag how does the big 16g compare to the 18g and what about Frankenstein Jr- with 17c or 19c compessor wheel.Which turbo has the least lag and good top end? Thanks

 

[Gooberlog]

i have no idea what you just said

 

[Boosted98gsx]

Originally posted by TugVR4
Which turbo has the least lag and good top end? Thanks

That is a contradictory statement, you lose one to gain another.

 

[niterydr]

14b's would be consitered a great street turbo setup, the sm 16g should be slightly laggier with more top end, I would recommend the big 16g for race gas applications, because the flow charts look like better efficiency depending your engines demands (mods).. try searching 3si.org, it has been brought up many times.

 

[TugVR4]

Originally posted by niterydr
14b's would be consitered a great street turbo setup, the sm 16g should be slightly laggier with more top end, I would recommend the big 16g for race gas applications, because the flow charts look like better efficiency depending your engines demands (mods).. try searching 3si.org, it has been brought up many times.

I guess I worded it wrong. Yes I know how bigger= more lag and better top end. I guess what I really wanted to know was how much of a diiference in spool time do you guys see betwween 14b-big 16g -18g. And Ill admit to not being farmiliar with the freinkenstein series. 3si.org? never heard of em. just kidding. Us 3s guys dont know shit about td05 (barely anyone has them) thats why I turned to the dsm crowd.

 

[Boosted98gsx]

14b (with 2.0L behind it) will reach full boost at about 2700 rpms, Big16g 3400 rpms, 18g dunno exactly but i'm guessin about 3700 rpms. Mind you this is with 2.0 liters pumping out exhaust to spool them not 1.5 like you will have, so spool up times for you will be slower.

 

[Tallen]

14b or small 16G should make life enjoyable.

 

[13secGST]

I would say 14b/16g/big 16g...any of those would be great. The 18g isn't really used that much because its not that effiecent and isn't really much better than a big16g(I personally don't think it is better than b16g).

And for you with twins...any of those three I first mentioned will be fun. 14b will spool quick, but doesn't have much airflow to support topend. 16g has a lot more air flow...and spool up is still very quick. and lastly big16g has the most air flow...and spool up is slightly slower.

I would actually think its more of about 100rpm difference between the three 14b-15psi(2700) 16g-15psi(2800) b16g-15psi(2900). I can build 20psi with my clipped/ported big16g by 3200...going up hill...third gear pull on flat highway, its more around 3600. But the numbers I MADE UP would be for non-clipped non-ported turbos.

But think don't think of psi as psi. Each of those turbos are flowing different amounts of air at the same psi. So even though spool up time is slower...you are still making the same power because you are still flowing the same amount of air.

I would pick Big16g...I did pick Big16g.

 

[danthman3]

bigger turbo's don't flow more volume at the same psi (turbines being equal)
this had been discussed to death on both dsm and 3si boards
they can flow a bit more mass-wise because of more efficient compressor housings resulting in lower temps
to increase power at same psi - cool intake air, increase VE (cam timing, port, efficient exhaustion of spent gasses), nitrous

 

[TugVR4]

thanks. I have 2 rebuilt 14b's Ill be installing first (I had allready bought them) so I was thinking B16 or 18g but sounds like B16 will be next. I kind of thought the 18g might be a little unefficient and you guys answered that for me. Like I mentioned earlier I have tdo4 dr650's(awsome turbo's) which let me trap at 123mph at 22 psi. That in our cars isnt enough to run high 10's(my next goal) I want to trap somewhere around 128-130mph. What is the freinkenstien series is this a 7cm2 housing with a different comp wheel?

 

[TugVR4]

Originally posted by danthman3
bigger turbo's don't flow more volume at the same psi (turbines being equal)
this had been discussed to death on both dsm and 3si boards
they can flow a bit more mass-wise because of more efficient compressor housings resulting in lower temps
to increase power at same psi - cool intake air, increase VE (cam timing, port, efficient exhaustion of spent gasses), nitrous

yep I knew that. The reason I m going with tdo5's is because the bigger turbine housing( the biggest restriction in the whole exhaust system) So Ill gain power and efficiency.

 

[danthman3]

i'll take those dr650's off ur hands for you
i think for 10's u may want to go with 16g's or even td05 20g's
good luck
keep all of us at 3si posted

yea i know why to go with td05's
i was responding to 13secgst

 

[Mo-Bo0st]

Originally posted by danthman3
bigger turbo's don't flow more volume at the same psi (turbines being equal)

But the 14b doesnt have the same turbine as the 16g turbos.

 

[danthman3]

im just stating that bigger turbos don't flow more air at the same rpm
unless they increase VE somehow