compounding with a t-25?

[jwahl16]

I'm just wondering if it is possible to compound a t-25 and a big turbo that puts out around 550-600+ hp. I'm not planning on doing this anytime soon but i don't see why it wouldn't be possible. I'm just thinking I would need a huge wastegate for the t-25 to keep it from over spooling. The possibility of having instant spool combined with high hp would be amazing. Let me know what you think!

 

[tazndrew04]

the t25 is too small for any setup IMHO,id look at the smallest at least being a 16g and nothing smaller or even a 14b as the 14b is a better turbo over the t25 just my opinion

 

[my dreamt dsm]

Not much of a turbo wizard but could a 14b hotside be mated to a t small. A 14b/16g combo is doable. Just a thought!

 

[JusMX141]

I'm just thinking I would need a huge wastegate for the t-25 to keep it from over spooling.

You'd want a huge wastegate on the T25 to transfer the airflow that wouldn't be going through the T25's turbine housing to the larger turbo in a quick and restriction-free manner. You wouldn't want your larger turbo to be limited to what that turbine that is the size of a 50-cent piece could flow, would you?

 

[DashLaflash]

How about a T25 and a 16g for the ultimate street set up? Would this give you the power of a 16g and the spool of a T25? I know some might think its not worth it but if you're satisfied with the power of a 16g but want faster spool this could be an option.

 

[talontsi18]

Even a Evo III 16g is considered a very quick spooling turbo. If your really worried abpout spool have a 2.3 or 2.4 motor and a Evo III 16g. Compounding with such small turbos would really not be worth the time to fab it all up. My 2.0 liter 8.5 compression motor spools my 16g really fast, I can't imagaine having a 2.3 or a 2.4 motor.

 

[jwahl16]

jusmx, that is exacttly what ii was saying. would need to make sure my wastegae is big enough to divert all of the extra exhaust gasses away froom the t-25. so theoretically im going to say this is possible unless they dontt make a big enough wastegate....

and to the people that said to mate a t-25 with a 16g i dont think that would be worth the effort, you could just as easily mate it to a 20g or a hx40 or some turbo that spools around 4000 ish.

 

[DashLaflash]

Even a Evo III 16g is considered a very quick spooling turbo. If your really worried abpout spool have a 2.3 or 2.4 motor and a Evo III 16g. Compounding with such small turbos would really not be worth the time to fab it all up. My 2.0 liter 8.5 compression motor spools my 16g really fast, I can't imagaine having a 2.3 or a 2.4 motor.

I don't know it might be worth it if you have a lot of free time and can weld. Actual materials would not cost all that much as I've seen a guy build a top mount manifold for only $300. Paul Volk has already done the research and development for the basic design, it would just have to be adapted with different turbos. He also hasn't gotten any solid power numbers and spool times yet with the compound set up so we really don't know if it would be worth it or not. If the result was a 16g that spools at 2500rpm at the cost of like $400 and some of my free time I think it would be worth it.

 

[Bluefire16]

^^ Yes he has, he has dynoed it. Cant remember what he last pulled, but he has. And second, his compound setup is FOR SALE. He is building a new and better one.

Pauls another MI boy like me.....