Hi guys, need some help with choosing the right turbo! I am looking to achieve the 450bhp mark with a quick spool up on my Sti blobeye! I am currently running a afp 20g, I have all the supporting mods already! Which of the 2 chosen turbos would be best for my car? or would anyone else have any better ideas? Thanks!

 

Yes Billet AFP20G fella,use a splash of meth and you will hit around 420-430 with rapid spool and have an amazing road car

 

Just do your research pal compaire graphs prices etc etc as see which one makes sence to you .....

 

personally id go for the sc42 over the md321t.a friend of mine has a sc42 thats running over 500bhp on 20% meth on a 2.0.plus you have the clinics customer service with the sc42 so a no brainer for me

 

will you not need the sc46 to achieve circa 450bhp?

 

Well check out the June issue of 'Banzai' magazine and JGM's mad green impreza, he is using two SC42 turbos , enough said me thinks....

 

Billet T for me


Jura

 

Sc42 is that not a 420bhp turbo on pump fuel, you will need the 321t for your power choice although on a 2.0 it will be laggy as far as I know its better suited for the 2.5. I wouldnt worry to much about 459 as a 2.0 with a sc42 will be one hell of a road car with good spool characteristics, I don't think you would miss the 20/30 bhp or if you do map it with a splash of meths.

 

New Billet T is suited like 2.0 or 2.1,we are running 490bhp on 2.1L

Older T is laggy on 2.0L,but new spools nicely as said on 2.0L or 2.1L


Jura

 

Quite a few different opinions on the two then... I guess the overall has chosen the sc42 over the md321t! Hope I won't notice the 20-30bhp loss then! Cheers for help peeps!

 

deffs a sc42 i run the sc36 at 390bhp and 380ftlb with a splash of meth, as said above my friend runs the sc42 at 500 + with splash of meth's.

 

super, learn something new everyday i didn't realize that the new billet wheels made that much difference

cheers jura

 

you'll find its folks being very partisan for which ever they have or prefer.

best bet have a nosey at the graphs for both and go from there. Also have a chat with both companies and see if they are the best turbos to suit your requirements, might turn out another option is better.


Personaly prefer the SC series myself,,, hahahaha

 

I was in a similar boat! choices were SC46 or 321T for a 440 target .... was a close call but ended up opting for the SC46.

Spool of an SC46 on a 2.5 is fantastic, and apparently the 42 is similar on a 2.0. So if your internals can take it, a 42 with meths should be the best of both worlds.

 

Sorry Stevie but you are wrong the SC42 will make 420 on pump fuel hence the name, the number on our Turbo units equates to the power it can achieve on V-power but even more power can be achieved with better fuels, Hope this helps.

Ads

 

Very true
MDX321T for me
Standard 2.0 early Blob UK STI Engine - Standard ECU - 1 bar @ 2700rpm
465 BHP with 20% meth at only 1.55bar boost.

Back to back testing needed

 

I have an SC42 twinscoll with IHI housing and it's bonkers!! When I had it all done my car only had 1500 miles on it so barely run in and it made 405bhp/383ltb however my car is feels much quicker now o need to get her on the dyno.

 

I had a 321t on my old classic, 447hp on v power albeit didn't really get going until 4500rpm. When it kicked in you knew it though!

TX.

 

It certainly does



2.1 with no AVCS so I reckon you'd see there or there abouts the same result on an AVCS equipped 2 litre engine.

 

Hehe, not sure it ever will be back to backed but would be interesting.

Pretty sure they have both had revisions done to improve them.

 

I went for the sc46 by the way on standard sti engine perfick and future mod proof
Remember the 2.1 etc are forged built engines so will produce different (better) figures than a standard factory engine.
Also some of the 2 litre cars are forged built too.
Don't get too hung on figures mate .
Good luck

 

A lot of interesting comments from everyone.. My cars only on standard forged internals but have heard n read a lot about these engines being able to handle over 500bhp! I guess i will be happy getting towards the 430bhp mark! Less stress on the engine!

 

Ads read the first 10 words in my orginal post ;-)

The OP was asking about a 450+ turbo hence why I said the 321t would suit his needs as the sc42 won't make that power on pump fuel as its a 420bhp turbo ;-) also stated that a non billet turbo would take some time to get going on a standard 2.0 as TX said 4500rpm and that to forget about the bhp target and your sc42 would have better spool and be better suited for his needs.

 

Id also say spool and drivability is SOOOOOOOOOOOOOOOO much more important than pub numbers! In the real world a 400bhp car thats drivable is quicker than a spikey 600.

Definately dont get hung up on numbers! But you mentioned spool in your opening post in the same breath as bhp, so im guessing youve got your head screwed on straight!

Good luck with the choice! either one is a quality blower! You wont regret leaving the TD world behind and entering the 21st century! haha :-)

 

I have a sc42 on my bug sti. Not sure on exact figures but Duncan said it was easily on the happy side of 400. He had never mapped a 42 before, but said it felt great with fantastic spool and no more laggy than the standard vf35 turbo, and i have to agree with him

 

Looks like the sc42 is a safer bet! Thanks martynj for the power graph!

 

One think we really need is the same car with the same setup testing both turbos.

If some one buys my SC42 I may just get an LM420 or 450 and put this issue to bed.
The only thing is, I am very very happy with the performance so don't feel the need to change.

However a 450 does sound nice, but means going front mount

 

Jura 2.1 is for sale somebody buy that and fit a sc42 / 46

 

That would only compare the twin scroll turbos though, don't forget we are talking about single scroll bolt ons here.

 

My sc46 is mental on the standard 2.0 l block. So fid knows what it will be like on a 2.1.