Gtx3071 vs precision 55/5857 on sr20det feedback

[silviaNC]

Alrite guys sorry if there is threads about this but my search option on my phone doesnt work so had to make a thread about it. Long story short bought a gt3071 bb from a member and got fked up cuse shaft and bearings were fked up. So know gotta get a new one. Was looking into gtx3071 or precision 55/5857 turbos. Would lke to get feedback/dyno sheets ect. Looking for as close of 500 as possible with not much of a lag 4k rpm is ok. Need tp get a turbo in the next 2 days

Setup
Built/ported head 272 hks
Built block 8:5:1
Q45 tb custom im
740cc nismo
Haltech ps1000
Walbro255
Other standard mods

[idahotuner]

get a gt3076 twin scroll
i get boost by 4000, 3500 in 4th gear

[silviaNC]

Originally Posted by idahotuner

get a gt3076 twin scroll
i get boost by 4000, 3500 in 4th gear

Whats your setup?
T3/2 exh ar?
Havent really seen the 3076 spooling that fast. However i read gtx3071 can spool that fast and specs say up to 600hp. Would really apreciate feedback on this turbos. Not familiar with the precision turbos(personaly dont know anybody running them or trusting them)

[idahotuner]

well my set up is a little special, i have a full race twin scroll single waste gate manifold, the front part of my turbo is a gt3076 and the rear is a .82 twin scroll t3 housing, i bought from atp turbo, its off a gt32, but ben bored to fit a gt30r 264 cams and greedy intake manifold, i am also over bored which gains me some spool up time, 90 mm bore making it a 2.2 liter and twin scroll, so full host comes on quick

[idahotuner]

the only upgrade i would do from this turbo is 270 pom cams and gtx35

[silviaNC]

Originally Posted by idahotuner

well my set up is a little special, i have a full race twin scroll single waste gate manifold, the front part of my turbo is a gt3076 and the rear is a .82 twin scroll t3 housing, i bought from atp turbo, its off a gt32, but ben bored to fit a gt30r 264 cams and greedy intake manifold, i am also over bored which gains me some spool up time, 90 mm bore making it a 2.2 liter and twin scroll, so full host comes on quick

Im pretty close from stock bore 86.5. Will be hard to spool the 76r at 4k tho. Really considering the gtx 3071 but price is double of the precision.

[idahotuner]

4200 is normal for a stock bore, but there is no way you will get 600 out of a gtx3071

[silviaNC]

Originally Posted by idahotuner

4200 is normal for a stock bore, but there is no way you will get 600 out of a gtx3071

I agree on that. Im not expecting 600hp at all. Butt would like to be close to 475 ish.
Any info in the 5558?

Also looking to get the t3 .64 ar turbine side

[rbs14kouki]

^ it took everithing for a gtx3576r to hit 580whp mustang dyno on our sr24vet .

[rbs14kouki]

My friend is runing a 5830 from precision on is 2.0vet ! And they manage to do 430whp (mustang dyno) a around 20psi pump gaz 94octane !

Im personnaly going 5858 bb on my car !


Here are the guys at powertune australia
http://youtu.be/Rmywmp03woY

[Jybfan04]

Originally Posted by rbs14kouki

My friend is runing a 5830 from precision on is 2.0vet ! And they manage to do 430whp (mustang dyno) a around 20psi pump gaz 94octane !

Im personnaly going 5858 bb on my car !


Here are the guys at powertune australia
Powertune Red Dragon vs Precision 5557S - YouTube

What cames is your friend using in his VE setup?

[ForeignMuscle]

5858 CEA all damn day. No version of the gt30 comes close. My 5858 starts boosting at 3k. 20psi around 4.5k and good for 40psi and over 600whp. I just ordered my new 6266 yesterday. Im factory bore/stroke as well.

A twinscroll 30r is mostly a waste. You can make very similar power with a factory mani and a 2871..

[ForeignMuscle]

Doublepostin'...

[sr20detconv]

I have a 5557. 264 cams, greddy intake
Made 373whp @ 18psi on a mustang dyno. personnaly I think it's too laggy for street use. Maybe I'll put a smaller turbo someday. Crazy pull to 8000rpm tho.

[K_style]

I purchased GT3071r in last November and before I did, I spoke to Garrett and ATP turbo both to consult whether I should get GTX over GT series.

Their answer was, if I am not looking to get over 500whp then it is not worth paying $300~400 extra to get GTX. Also spooling time is very minimal to notice.

with my 3071r .63 I get full boost @ 3500rpm. I don't feel much lag at all.


Just FYI...

[Jybfan04]

Originally Posted by sr20detconv

I have a 5557. 264 cams, greddy intake
Made 373whp @ 18psi on a mustang dyno. personnaly I think it's too laggy for street use. Maybe I'll put a smaller turbo someday. Crazy pull to 8000rpm tho.

On the 18psi when do you hit full boost?

[idahotuner]

Originally Posted by ForeignMuscle

A twinscroll 30r is mostly a waste. You can make very similar power with a factory mani and a 2871..

not true, a stock mani and gt2871 max out at 400 maybe 420 is at close to 22-24 psi, i know from personal experience.

gt3076 will max out right about 550 ish at 30-33 pounds of boost, but should make around 450 at 20

where a gt2871 will make 350 at around 17-20 depending on set up, but not trying to distract with gt2871 talk,

i would look into a BW turbo if i wasn't running a garret

[ForeignMuscle]

Originally Posted by idahotuner

not true, a stock mani and gt2871 max out at 400 maybe 420 is at close to 22-24 psi, i know from personal experience.

gt3076 will max out right about 550 ish at 30-33 pounds of boost, but should make around 450 at 20

where a gt2871 will make 350 at around 17-20 depending on set up, but not trying to distract with gt2871 talk,

i would look into a BW turbo if i wasn't running a garret

Ok first off, you cant use pump gas #s for the 2871 and then say 30psi and 500hp for the 30r. 30r is not efficient over 25psi. Obviously those #s were 'made up' using race gas. A 30r will only makea few more hp over the 2871 with both running pump fuel. Remember the compressors are identical...

Op, if you dont plan on cranking the wick and running 30psi+ then dont waste time with PTE or BW. They both are built for big boost. Garrett's gtx series as well shines with big boost.

I also cant believe someone mentioned lag. Compared to what a t28? My 5858 is more street friendly than my 2871 was. If you want torque get a v8.

[bc.]

Originally Posted by K_style

I purchased GT3071r in last November and before I did, I spoke to Garrett and ATP turbo both to consult whether I should get GTX over GT series.

Their answer was, if I am not looking to get over 500whp then it is not worth paying $300~400 extra to get GTX. Also spooling time is very minimal to notice.

with my 3071r .63 I get full boost @ 3500rpm. I don't feel much lag at all.


Just FYI...

More specs on your motor? Bore? c/r? exhaust manifold? t2 or t3 turbo?

I am just about done with my S14sr20 build and I was wondering about where my boost will hit. I have a gt3071r which uses the stock sized t2 manifold, so for now I am keeping that, but I also have it bored to 90mm and a 9.0 c/r.

Sorry for the thread-jack

[idahotuner]

Originally Posted by ForeignMuscle

Ok first off, you cant use pump gas #s for the 2871 and then say 30psi and 500hp for the 30r. 30r is not efficient over 25psi. Obviously those #s were 'made up' using race gas. A 30r will only makea few more hp over the 2871 with both running pump fuel. Remember the compressors are identical...

Op, if you dont plan on cranking the wick and running 30psi+ then dont waste time with PTE or BW. They both are built for big boost. Garrett's gtx series as well shines with big boost.

I also cant believe someone mentioned lag. Compared to what a t28? My 5858 is more street friendly than my 2871 was. If you want torque get a v8.

ok........ your a little confused a gt2871 isn't efficient over 24-25 psi, gt30r doesn't really start to shine until 20 psi so saying it only has 5 psi of efficiency is close minded

[idahotuner]

[ForeignMuscle]

Originally Posted by idahotuner

ok........ your a little confused a gt2871 isn't efficient over 24-25 psi, gt30r doesn't really start to shine until 20 psi so saying it only has 5 psi of efficiency is close minded

Im not confused at all. A 30r does not shine past 20psi..

And nice maps but were talking 71mm compressor wheels and actual numbers produced on an sr.

Correct me if im wrong idaho but did you ever even finish your build?

Precision turbos outflow, spool fasterand make more power sizefor size versus garrett.

This comes from someone who has used several garrett and PTE turbos. Experience doesn't come from reading that compressor map..

[silviaNC]

Really nice info guys. Shop is giving me 2 good options the pt5558 and the gtx3071 pricewise the 5558 is right under 1k and gtx is 1.7k just dont want regret getting the 5558 if i dont like the response. Car will be tune at 20-24 psi and 12 -15 for dd if i have to. On 93 pump gas. Ive been searching tday and look gtx will spool 300rpm earlier than the regular gt but both are prety much identical after that.
When choosing turbine housing wich one will u guys recommend t3 twin scroll .78 or single scroll .64? Like i said want to hit around 475hp with good response

[idahotuner]

Originally Posted by ForeignMuscle

Im not confused at all. A 30r does not shine past 20psi..

And nice maps but were talking 71mm compressor wheels and actual numbers produced on an sr.

Correct me if im wrong idaho but did you ever even finish your build?

Precision turbos outflow, spool fasterand make more power sizefor size versus garrett.

This comes from someone who has used several garrett and PTE turbos. Experience doesn't come from reading that compressor map..

Yeah my build has been done. I just swapped wiring harnesses.

[K_style]

Originally Posted by silviaNC

Really nice info guys. Shop is giving me 2 good options the pt5558 and the gtx3071 pricewise the 5558 is right under 1k and gtx is 1.7k

5558 is under $1k if you get Journal bearing. price gets pretty close if you choose Ball bearing.

[silviaNC]

Originally Posted by K_style

5558 is under $1k if you get Journal bearing. price gets pretty close if you choose Ball bearing.

Just hung up with the shop and thats exactly what they say. Just ordered the gtx3071

[K_style]

Originally Posted by silviaNC

Just hung up with the shop and thats exactly what they say. Just ordered the gtx3071

What's the power goal are you trying to achieve ?

If it is under 500whp GTX is quite overkill...

[silviaNC]

No less than 475hp. Will have to upgrade injectors later. Rather have room to grow than a maxed out turbo. 525-550 will be the most i might want from it

[silviaNC]

Originally Posted by K_style

What's the power goal are you trying to achieve ?

If it is under 500whp GTX is quite overkill...

I can always tune e85 later on. But as stated above thats pump gas goals

[K_style]

Originally Posted by silviaNC

No less than 475hp. Will have to upgrade injectors later. Rather have room to grow than a maxed out turbo. 525-550 will be the most i might want from it

Originally Posted by silviaNC

I can always tune e85 later on. But as stated above thats pump gas goals

Fair enough.

Enjoy your new turbo!!!