twin turbo rb25

[jrsink]

anyone ever seen or done one?

[S14240RB]

if you had money to spend on building a twin turbo RB25, you might as well just get the RB26

[Nameless EJ6]

Research the benefits of twin turbo.. it'll help you make your decision.

It's stupid to do it IMO.

[TheOne]

there is a company that sells a twin turbo manifold for the RB25, am pretty sure i've seen it but don't know the namy/site, try searching.(i HAVE seen a picture of it in this forum)

[Yellow4g63]

anyone ever seen or done one?

You can twin turbo the 20 or the 25. I forget which company that was selling the conversion plate that lets you bolt up the stock RB26 twin turbo's to the 20 or 25. The 26 flange is a diffrent bolt pattern than the 20 or 25.

[jrsink]

not nessesarily, i think. if i had the (on average) $1,000 more to buy a rb26 instead of rb25 (~$3,000 vs. ~$4,000), then i would still have to go back and get/scower for an rb25 transmission (~$500-$800), and whatever else that is different for the rb26 into s13 swap. Im not sure of the specifics for that one.anyway, my cream aint long enough to cover $5,000 plus for a swap right now.2nd best thing: rb25

[RMiller]

not nessesarily, i think. if i had the (on average) $1,000 more to buy a rb26 instead of rb25 (~$3,000 vs. ~$4,000), then i would still have to go back and get/scower for an rb25 transmission (~$500-$800), and whatever else that is different for the rb26 into s13 swap. Im not sure of the specifics for that one.anyway, my cream aint long enough to cover $5,000 plus for a swap right now.2nd best thing: rb25

If you don't have $5000 don't start a 25 swap. I think there's a good chance you won't be able to finish it.

[Andrew85cm]

Shoot my RB20 swap was almost 5 grand and I didn't need a drive shaft or anything. I would consider waiting til you got a little more flow before you dove into this one.~ANDREW~

[JonPowell]

My bargain basement RB25 swap was over $6K....inc car but no mount kit.

[gawdzilla]

dont get confused and think a parallel twin turbo setup (rb26) is superior to a single. stick with the single- less piping losses, less hardware that can fail, and SAME if not better performance of parallel twins.

[RMiller]

dont get confused and think a parallel twin turbo setup (rb26) is superior to a single. stick with the single- less piping losses, less hardware that can fail, and SAME if not better performance of parallel twins.

I don't know about that, literature I have says that twins are better. Who's the author, Bell(?). Auto manufacturers must use a non-sequential twin setup for reasons other than for marketing. I think my book is right, although it says it only applies to engines of a certain size and larger, which I think is in the 2.5 liter range, but not sure. Something like that.

Anyway, it's not worth overhauling the stock setup, that's for sure. I say if you start twin stay twin, if you start single stay single.

[JonPowell]

Smaller twins will give you quicker spool but lower CFM.

Larger single will USUALLY give you more CFM but more lag.

Depends on what you want.

Car manufacturers use parallel setup to make the car more streetable and sequential to make it have quick spool & big boost. One turbo smaller than the other...whent he small one drops out of effenciency the larger takes over.

Funny, this is almost the EXACT SAME TITLE!zerothread?id=79096
Modified by JonPowell at 10:06 AM 4/3/2005

[s13rb25det]

it seems like to much work! why not just go with a rb26? I have seen kits though for the 25 that make it a twin I have also seen a few ka-tt!! those are super weird!