97_ek_coupe

Hey dudes, ive been browsing for a few months trying to study up and choose a properly sized turbo for my build. I have a d16y8 aiming for 300-350whp, supporting mods will be 75.5 vitaras, custom rods for 8.5.1 comp., ram horn mani, 3inch dp, arp head studs, sk2 im, and possibly a bisi 2.4 turbo cam, not sure if I can get the cam in budget.

I want to spend no more than 600 for a good turbo, looking for spool hopefully around 3.5-4k that would meet my goals. Saw a precision unit for 600 (5431e) that I was gonna run with .48ar, how would that meet my goals? Or would the cheaper 4854b for $540 meet my goal better? If you guys have any other suggestion throw it my way, I just wsnt to get to my power goal with a quick spool. Thanks

97_coupe

http://www.go-autoworks-store.com/gocudy.html

lots of T3/T4 dynos at 300+WHP, slightly more than what you wanted to spend($689)

You can always contact go-autoworks as they will always help you out

and the same goes with TheShodan on HT. Both very knowledgeable

boosted_D

iTrader: (1)

In my humble opinion:

4854 is not big enough, it wont make the power your looking for
5431 is big enough, maybe a touch too big for your goals

In precision, a 3254 with .48 hotside would meet your goals, and have very good spool up

In Garret a 50 trim t3/t4 with .48 hotside would also meet your goals well with good spool up

Both turbos would be similar in power and spool characteristics

IF it were my build, I would opt for the Garrett unit.

The garrett is $689 and the precision $619 price is very close, I have used both Garrett and precision turbo's with good luck, just seems that overall quality/craftsmanship/reliability of the Garrett units is better, well worth the extra $70 IMO.

Timmay

Got a z6 with same motor setup minus stock cam/im and we are using a hoselt hx35 with 12cm exhaust housing. its a beast but wont get full boost under 5k with stock cam/im/head. prob would spool better with your bisi cam

we had a just basic emusa turbo kit on it before and itwould make 26lbs by 4400rpm, but IMO it was way to violent of a power band just would spin and smack the limiter to easy. The hx35 has more of a gradual powerband and actually feels faster as its able to put some of the power to the ground now. Into this turbo maybe 400 bucks after rebuild and a brand new housing

Balor_Gr

It seems that a 50 trim .63 a/r would be best.There is a stage ii turbine wheel that would be nice for the sohc.Check the link i posted at the other "extreme compression" turbosth thread.
im typing from a dam cell phone.Also it seems that bisi 2.4 is bit too much for 300 whp?Maybe its just me

97_ek_coupe

Yeah I hsd seen the gaw page, but im knowledgeable enough on different models to know the similarities in specs, I wondered if anyone was running a similar build.

Boosted d, good info. Would the 5431e still be too big if I ran .48 hot side? Let me do a little hw on those two units, good spool up us a bit more important to me than top end power.

Timmay, surprised to hear an emusa was too violent haha I figured that kit would blow just by looking at it. If that turbo came in a bit earlier I would really be interested

And balor gt the bisi cam I actually havent purchased yet, itll be one of the last things I get for that same reason lol I just dont want to have the turbo doing all the work. Im also on a phone at work, ill take a peek at that link as soon as I get home

Timmay

the emusa kit actually kicked ***, we ran 26-27lbs on it no issues, car was strong but boost came on to fast and had alot of spin. 1st gear would easly get 20+ and other gears had 26-27 by about 4200-4400.

with the hx 35 its more in the 5k range but its alot smoother and car actually feels faster, i think with a cam/im it would spool a touch faster. Holsets are kick *** turbos

97_ek_coupe

Thats amazing spool...wheres a good place t look into that holset? Ill so some hw

scottdh20

my hx spools pretty damn fast...i would say its barely slower than my old t28 setup....but i have a divided manifold....holsets are the **** when coupled with a twin scroll manifold. i would not want a faster spooling turbo than my hx with the power im at. just saying.

also skip the bisi cam....far better options available that are known to NOT break in two pieces and chew up your valvetrain. i love my delta 272-2

boosted_D

iTrader: (1)

Its not that the 5431 is entirely too big, its that you sacrifice spool time when you use a turbo thats bigger than it needs to be.

If you want the best spool up response possible, you use the smallest turbo possible to achieve your power goal.

Any of the 3 turbos

5431E
3254E
Garrett t3/t4 50 trim

will get you to low to mid 300 whp range. I will say that on a sohc, that cam will make a hell of a difference compared to a stock cam, it would be worth doing.

Most people will say .63 a/r on the turbine because it is capable of producing more power, but those turbos with a .48 turbine cover are capable of low 300's, and if your looking for good spool, thats what you want.

A .63 hotside will take quite a few more rpm to really get cranking.

Depending on what cam you use (bisi vs stock) you could expect power t come on full blast about 600+ rpm sooner with the .48

I personally still vote Garrett t3/t4E 50 trim with .48 A/R

Timmay

i look on diesel forums. for a sohc we are running the 8 blade with 12cm non gated housing. You can buy the housing brand new for about 220$, find turbo for 100-200 used, and a rebuild kit from holset for 55$

if you are really interested i could source you one and rebuild for you if you wanted. ill be running a 7blade on my s2k aswell

boosted_D

iTrader: (1)

Just out of curiosity....

How are you properly spin balancing these rebuilt turbos to 200,000 + rpm to ensure longevity and that they dont self destruct?

Timmay

no need Holset does individual balancing on their turbos, thats why you can change wheels and housings on them and have no issues


personally i think the 50 trim with .48ar is to small, i usally do the 57 with .63 and still can manage full boost before 4500 rpm

stoptheh8

Turbonetics t3 super60, .43

Timmay

that turbo will be maxed out pretty quick on a built D, plus they choke up above 6k from what ive seen

boosted_D

iTrader: (1)

A 57 trim actually doesnt make much more peak power than a 50 trim, very little difference.

The 50 trim has better linear power than a 57 trim though.

As to the .48 vs .63 A/R I agree a .63 will make better peak power, but at the sacrifice of spool time.

He is looking to be happy with roughly 320-330 whp. And honestly, once you get above those numbers you start running into reliability issues if its a daily driven car.

A .48 may be at the peak of its ability at low to mid 300 whp territory, but it will do it, its a single cam, so he wont be revving it to the moon like its a B, so it wont run out of breath.

The .63 will take all of 5000 rpm to make 20+ psi, whereas a .48 will do it in the lower 4,000's it is a substantial difference in spool time.

Timmay

i was talking about a t3 super 60 not a 50 trim or 57 trim when saying running out of breath

as far as 57 trim taking over 5k to get full boost, my logs show full boost 26-27 by 4400 rpms, even in 1st gear we were seeing over 20 on slicks
this was a vitara long rod, z6 with stock head, cast manifold 57 trim .63 ar. IMO it spooled to damn fast and would cause a ton of wheels spin, even 2nd gear was worthless on 225/50 BFG's, 3rd gear would spin when trying to do logs on street tires, had to use the bfg's to even get a good log

now withe the current ram manifold and hx35, car hooks in 3rd gear on street tires as the boost comes on around 5000-5200 but its more linear. The car actually feels faster, i gotta get some logs and look at time from speed to speed to verify

Schister66

T3/T04e 50trim .63 ar or possibly an 18g...check the link below

https://honda-tech.com/forums/forced-induction-16/dyno-results-3132243/

mitsuman

iTrader: (1)

td05 out of an evo 8 + divided manifold = super fast spool and wont run out of breath at 300whp. this is the set up i am using. and i am aiming for the same power goals, maybe a bit more traction permited. pictures of my set up... manifold/downpipe fabbed up by luserkid.

turbo = $140 shipped
manifold + DP = $650.

less then 800 for a nice set up. and if you have to replace the turbo, theres plenty on ebay for under $200. these turbos are also very upgradable if you want to make more power in the future.

Timmay

are you keeping the internal gate? id block it and go external myself, those are known for boost creep and also not being able to hold boost solid

mitsuman

iTrader: (1)

keeping the internal gate for now, i wanted the cleanest, most uninterupted amount of air flow possible, although i am not against a external WG set up if need be. We shall see.

Balor_Gr

I like how easier is to make a divided manifold with the mithubishi flange...

mitsuman

iTrader: (1)

Also, I want to make note that I used a smaller inner diameter piping to further help with spool.

I used 1.25 as opposed to 1.5.

boosted_D

iTrader: (1)

OP just know that a .48 turbine cover will make low 300's whp, and will spool faster than a .63 thats all there is too it.

As far as a stock evo 8 turbo goes, its a great turbo, will make good power and have good spool up, however, I dont know how easy it will be to make 330 whp with one, certainly not as easy as a 50 trim will.

There are evo 8's out there making 350+ whp on them, but that is about as much power as they will give, and on those evo's thats a 2.0 liter DOHC motor, not a little SOHC 1.6, and all those evo 8's making that kind of power on a stock turbo are cammed to **** and on E85

Timmay

ive seen stock evo 8 turbo make 420awhp on a 03 evo, bolt ons, cams and e85. If you ran it up higher boost on race gas/e85 i dont see a problem with one making 350 ish on a built sohc