Hi

i need an advice, i'm not happy with my boost curve and i want a smaller turbo i know the problem is the turbo exhaust housing on the Holset hx40 that i'm running now, i have a Holset hx40 with a 60mm compressor wheel i'm not shure what the exhaust wheel is but the housing is 16cm2 which is way to big, so i need you advice on what i should do, i'm in iceland so i'm looking for a turbo that is not more then a 850$ with shipping

my setup is a build b16a2
Block
CP Pistons 9.0:1
Manley H-Beam rods
ACL Race Bearings
ARP Headstuds
Cometic 0.30 Headgasket
Stock crank
Supertech blockguard

Head
GSC T1 cams
GSC Dual Valve springs with TI Retainers
Stock Valves
Edelbrock Victor X intake

Fuel
RC 1200cc Injectors
AEM Fuel Rail
Stock Lines
Walbro 450/460 e85 version

Turbo
Holset hx40 60mm compressor wheel - 16cm2 exhaust housing

I'm running it on a chipped p28 with a boost solenoid boosting 29.2psi on pump gas but it's laggy as hell full boost is 6500rpm or something

 

Buy a smaller turbine housing... problem solved.

 

The problem is not just the turbo. It's the fact that you have a b16. This is why if your going to spend the money to build a turbo b seres block you might as well start with a b18 block.

If I would you I would buy a Garrett gtx3071r swap turbos and retune and call it a day.

 

i think there are like 9 b18 blocks around i iceland and they are all in cars or with broken or damaged sleeves so i didn't have a alot to chose from when i started

but i kind of think that the gtx3071r is to small

 

9:1 comp 1.6 liter engine is the problem...

 

i think there are like 9 b18 blocks around i iceland and they are all in cars or with broken or damaged sleeves so i didn't have a alot to chose from when i started

but i kind of think that the gtx3071r is to small for my setup

 

If you like the Holset but need quicker spool try to find an HY35 with the 9cm exhaust housing. That is what I will be running but on a b18.

 

PTE 5858, or could even go with something like a borg warner s200sx or mabey a s360.

 

How much power do you want to make? With only a 1.6l engine any turbo bigger than a gtx3071r is going to be just annoyingly laggy. But of course this is just my personal opinion. Some people might be ok with not spooling the turbo until 6,000rpm.

A gtx3071r will make over 500whp with e85/race gas.

Best thing you can do with out rebuilding and upping the displacement would be to run a gtx3071r or gtx3076r with a 1.06ar twin scroll hosing and a twin scroll manifold.

 

A Holset hx40 is going to be laggy on a 1.6 period.

a guy in the USA machines Garrett t31 turbine housings to fit Holset turbine wheels. he offers .63 and .82 versions for under 200usd. I'm pretty sure if you asked he could do a .48 but it would limit high rpm power due to the pre-turbine backpressure increase and lower flow choke point.

For the kind of power you want out of a 1.6 the required turbo size is going to be fairly laggy, that's just the nature of the beast.

the 3071 will be fairly close to it's practical efficiency limit to produce 500whp, regardless of the compressor flow/map as the turbine wheel size will limit power potential.

 

Yes. That is the limit on the GT3071R. The GTX3071R is a different story. That's a bit over 540whp. with better overall efficiency.

 

If he buys a GTX3071r he'd get a divided housing, not a twin scroll. Garrett just released true twin scroll housings last year but they aren't standard options on their turbos yet and you're looking at another 570 plus shipping for a t3 twin scroll housing for the gt30 turbine wheel, 3 different size options .64, .82, 1.01.

 

Pretty much. Plus availability on those bad boys is difficult, despite what's shown online. In this particular case and goals it wouldn't be worth the investment. Just even the standard T3 .63A/R or .82A/R GTX3071R would do fine.

 

Yup.

I've been doing this too long :/

 

Or even a TR3030R. But his budget was $850, so this is all a moot point, I guess.

 

yea 850 won't get him anywhere really... unless he buys some entry level precision unit

 

i found a 6262 bb with .63 a/r i'm gonna take that i guess

 

And the tale of lagginess continues.
:-(.

Basically a stock kia will now out accelerate you. You were better off with the mid level precision, than THAT choice.

 

for 500 a 6262 is totally useless... that's an almost 800hp turbo. the ball bearing CHRA won't help with lag times like you think it will, it will really only help with recovery times between shifts, especially on a 1.6

You won't have any power till 6,000-7,000. Making it a dog on the street and only good for highway pulls and drag racing

my stock automatic accord could accelerate faster than you lol

 

then i have a question there should be less lag with the 6262 then the hx40 that i have now going from a 16cm housing that is 1.10 a/r or more to a 0.63 on the 6262 or am i wrong?

 

i think the exducer wheel is 86mm

 

I would stay with the Holset. they are super strong turbos and work well on our motors.

the Holset turbos are all designed for diesel motors so the engineers had to design a turbine wheel that worked with slow, cold exhaust gasses. as such the wheel really is a work of art, it's highly aerodynamic to begin with and when it's used on gas motors with faster, hotter exhaust gasses it really shines.

I already told you I can point you to a new t3 Garrett t31 turbine housing machines for the hx40 wheel.. .63 or .82 for under 200 shipped

also if you decide you want more out of the turbo in the future then I can supply you with a direct replacement (fits stock compressor housing, no machine work needed) billet extended tip compressor wheel. It will allow you to squeeze a little more power out at the same turbine flow level, so even if the turbine wheel is at it's flow limit you can easy gain 15% output.

typically at the same pressure level as the cast wheel, the billet wheel with proper tuning sees a 15% increase with a slight response gain (billet is slightly lighter than cast). the main benefit is much higher pressure levels. the wheels can withstand 70psi but you'll never get the turbine wheel to spin that fast... 40psi isn't totally out of reach either.

if your setup can take it, at higher pressures with tuning the billet wheel has seen 30% gains.

I don't sell them yet but I can point you to an affordable supplier if you ever decide to go billet.

As far as the 6272, it's just a horrible mismatch for your setup.

Regardless of what size t3 turbine housing you use (never go t4 anything on a 1.6 with a turbine wheel that large) with the 6262 you're looking at massive amounts of lag, keep in mind that turbo has made almost 800whp on big Honda motors.

but with your 1.6 and a 500hp goal your motor won't break the 200hp mark till at least 6,000-6,500. then within 1,000-1,500rpm you'll have a violent power and torque increase to 500hp+ causing severe traction issues. I'm assuming for reliability and longevity you aren't shifting much past 9,500rpm.

so really you'll have about 2,500-3,000rpm of useable powerband AT MOST. Then in between shifts, depending on gearing, tire size, ignition timing, boost pressure, and other tthings, you're looking at roughly 500rpm for the turbo to reach full boost.

if you havea short runner manifold, ceramic coated/wrapped manifold and turbine housing then it will respond and recover a couple hundred rpm quicker, which would help with recovery time between shifts but not much for initial response.

 

Thanks for all that great info, i knew i would get a good response from you :D

if you could send me the info on the garret housing ;D

my tuner said that the 6262 bc it is a ballbearing and has a 0.63 a/r would be great for me it has 3000 miles on it and the oil seal whent bad so it was sent to pte and they fixed it i can get that for 875$ and it's here in iceland but i wasn't sure about that so i asked, i have found the wheel i need for the 14cm housing but i can't find the housing for the holset for a fair price

but about my manifold i have a sucky drag cast manifold, i still need to buy a good manifold but i just wanted to have more fun then this the summer and do that next winter

 

Your tuner is just trying to off something on you that doesn't fit your application, bottom line, even if it is for $875. Just because it is ball-bearing, doesn't mean its going to spool any faster for what you're trying to do for just 300whp on of ALL items a drag cast manifold. At this rate you might as well get a good Evolution 16G6 and Make use of that with the money.

You're wasting your time. I understand what you use is, but you won't enough road to even use this turbo..