Twin Turboing an SR20DET

[drifter_for_life06]

Ive been wondering a lot lately if its possible to twin turbo a SR. If anyone knows if it is please share whatever info you have. Like what kind of mods and rebuilding will i need? Has it ever been done before, and how much would it cost? And my final question, would it be able to work with the TODA SR22DET stroker kit

Thanks in advance for any information you may supply

[BB Turbo]

Yes, it has been done b4, many times. I forget who, but I think blitz makes a kit for that. Just check around. Quite a few companies makes kits for it, i dont know if its actually logical or makes sense to TT an SR, anyways, happy huntin.

[drifter_for_life06]

thanks ill look into blitz

[SeVa-S13]

I don't think a stroking kit could affect a TT setup at all, can't see how it would.... Well, the extra 2/10 of a liter would help you spool slightly quicker but the general consensus remains that it's still not practical. Cool, but not practical.

[drifter_for_life06]

why isnt it all that practical?

[MainEvent212]

twin turbos are best for high displacement engines...that's why even on an RB26/2JZGTE single turbo conversions are popular ways to get more power....technology will let these large *** single turbos spool fast as hell...which pretty much nullifies any plusses from a twin setup...that and a single turbo is just much more manageable asthetically...1 set of pipes...etc.

this is from the top of my head. so i may be off...i dont know

[SeVa-S13]

Small displacement trying to spool 2 turbos just isn't nearly as efficient as a single, larger turbo. Nor is it as cost-effective.

Edit: Just search, many a-noob has inquired about this before you, and many will do so after.

[Onizuka]

Most twin turbo SR's are for show. I dont think there are any real kits out there, its all custom.

[SilviaLuvr]

LOL, I have that pic.

[drifter_for_life06]

ok thanks guys, thanks Seva even tho im not a noob

[APEXi240]

Everyone's a noob...I think I still am, cause I haven't learned ****...I may have actually forgoten information since joining this site.

[SeVa-S13]

/me aer newb.

[D1SR240]

even though it may not be efficient it sure does look awesome

[yeswepromise]

the picture posted is of GP sports show car (i'm not sure if it is the s14 or the s15, but it is one of them.)another tuner who has made a sr20dett is Garage Thrash. it was a black s14 zenki made for tokyo auto salon. actually, i think it was a sr22det to be exact.

[drifter_for_life06]

thats what i plan to do SR22DETT, but thanks, i think it would be a good setup, lag would be a ****n issue but i have a solution(a theory i have come up with) to fix it hopefully

[D1SR240]

what's your theory?

[drifter_for_life06]

its a theory i modified, i heard its basis over on club4ag.com...here it is

[drifter_for_life06]

if you get a twin turbo, no doubt you are going to have MAJOR turbo lag and you will spool up rediculously slow. So to fix that my solution would be as follows: You have two turbos, one is smaller than the other(for example a T25/T28 bad example but you get the idea) with this setup the smaller turbo will spool quicker giving more power at lower rpm's eliminating the LARGE turbo lag, and as this turbo begins to reach its maximum output of power, the secondary or the larger turbo, is spooling up, putting out its maximum power. So (i thought) in theory you would still get loads of power, AND eliminate the lag. Now indeed you would have to maybe fabricate a few things and get the exact turbos to spool right, so that not all your power is mid range RPMS

So that is my theory, what do ya think? Yes/No/Maybe

[D1SR240]

maybe, i don't see how it wouldn't work, besides maybe lack of space

[drifter_for_life06]

thats what i was thinking, but the twin turbo alone will have lack of space

[MikeMurphy]

if you get a twin turbo, no doubt you are going to have MAJOR turbo lag and you will spool up rediculously slow. So to fix that my solution would be as follows: You have two turbos, one is smaller than the other(for example a T25/T28 bad example but you get the idea) with this setup the smaller turbo will spool quicker giving more power at lower rpm's eliminating the LARGE turbo lag, and as this turbo begins to reach its maximum output of power, the secondary or the larger turbo, is spooling up, putting out its maximum power. So (i thought) in theory you would still get loads of power, AND eliminate the lag. Now indeed you would have to maybe fabricate a few things and get the exact turbos to spool right, so that not all your power is mid range RPMS

So that is my theory, what do ya think? Yes/No/Maybe

welcome to 20 years ago . Thats been done and has been in a few cars in the 90s. Bro, unless your going for novelty (and have the knowledge and cash to back it up!) the TT setup just isnt practical. Your sequential idea makes sense but is not applicable. Two T25s would spool up just fine on a 2L engine. There wouldnt be "major" lag. The only time I would consider 2 turbos is with a V block, not an i4 or i6.

Also you should consider that one properly sized turbo is always more efficient than two smaller turbos. Im refering to specifically to the compressor housing clearance between it and the blades, and the number of pulses. Even if you can get T25s for $50 its not worth it.

[drifter_for_life06]

i know there is a lot to consider, and that theory of mine has some refurbishing to be had, and i was contemlpating the TT setup but im still not sure if i would even go for it, thats why i posted

[nissanrcer240]

You must have a big disposable income to be planning something like that, I mean the stroker kits are like $4-5000 right there

[dima]

If you are concern with turbo lug, you better get a supercharger.

[BuudWeizErr]

I like YOUR sequential turbo theory. Seeing as how the FD RX7 and MKIV 2JZ-GTE Supras both use sequential turbos from the factory.

And every twin turbo SR20 I have seen so far was ALL right hand drive. There is a lot of stuff in the way to do it on a LHD car.

This is one of those ideas that should have never gotten onto the drawing board.

[JJ240]

Dont those sequential systems have alot of vacuum controls to regulate the sequential system? If not why wouldnt the exhaust flow to the path of least resistance which would be the smaller turbo...not sure if it works like that, but seems to make sense in my head. By the time the larger turbo got into its mid-peak boost the lower turbo would be way past its effective range and just be pumping out heat. Anyone able to confirm if thats accurate or not?

[cyris3d]

the fastest Skylines in Austraila are still TT.. and those guys are running 2.. TD06-25Gs(t-67)

look at http://www.exvitermini.com/pr33b.htm this is a 8sec TT car.. its only 2.7 liter..Twin Turbo is a very efficent setup if you know what you are doing..

Lag.. HAHA.. thats whats NOS is for.. LOL

[240Kuminachu]

Just get the disco potato and call it good!

[Supafly]

decide what you want to make power wise. then decide if a twin setup will work for you.

but it's still a pretty crappy idea on an inline 4. the logistics of getting it setup, plumbed in, and working correctly seem to be far beyond your reach. i mean come on, you're calling sequential turbocharging "your" theory...

get a topmount and call it a day.

[Redline240]

If i'm not mistaken the two 6sec street glow soloras run a 2jz with twin turbos, and i know the Venom tundra does...but the 8sec supra's on street tires titan/msp run huge single turbo...i guess the thinking would be that the street cars with the added weight and street tires can't get the traction(thus using the lag to they're advantage) where as the C/F bodied, tubed chasis cars running slicks take the power off the line....all this on a 3L I6...

So if your truly goin for all out power and got the know how then a SR22DETT might be your answer, but your not gonna get traction unless you go with an all out drag car...and even then a big BB single turbo might still work better...

And unless your building a drag car or if you have the money to be different then go for it, but don't be suprised to spend 10g's plus on top of the engine costs and traction issues...

Redline