Does anyone have experience with this turbo?

Im planning to buy a GT3071
- TO4e
- 60ar/.63hot

Now i'm still running on a stock b16a, stock head, etc.
I'm planning to do some engine work but i'm not shure what setup to run to get fully use of the turbo.

money isnt really a problem for this is a project and im not planning to have the car finished by next week.

does someone have similair turbo /w setup and what HP numbers. any info on the spool time of this turbo..

im completely new in the turbo scene so any help would be appiciated !

 

I was looking for a good ball bearing turbo for my b16 a while ago, and was recommended to use the 3076r not the 3071. Now I didn't get any reasoning for this, but that is what I was told.

 

Junkie's right. Go with the 3076r. Reason is you can get way more power from a 3076 and spool is almost the same. If you want exact specs and reasoning PM TheShodan

 

i have a 3076... havnt installed it yet but it just looks cooler than the others!

 

Be a man and get the 35r )

 

Get the 3076r. The 71 hotside is the same hotside that comes on the 2871. If u wanted a gt28 series turbo, then id say get the 71. The 71 is just another option for those wanting a little quicker spool out of a gt30 series turbo. I dont even think the difference is noticable. A 30r is gonna hit hard as ****, you dont need it to spool any faster then the 3076r would. Its gonna blow the tires off on a stock motor at even just 8psi.

 

x2 .. Hahaha

 

yeah well the thing is i can get a great deal on a gt3071r its used but its in very good shape! so thats the reason why i'm thinking to BEGIN with the gt3071.
i will start off running this turbo on my b16 (low boost) as i save money to buy parts to build my block.

I wanna start at around 300 ish hp and end up in the 4's by the end of the year/or beginning of next year.. do you guys have any tips etc to help me ?? what kind of headwork, CR, valvetrain, etc anything is welcome..


+ i never had any experience with turbo before so the gt30 will be my "intro model" to turbo and evt i will upgrade my setup.


btw a friend of mine is helping me building my car, he had the fastest fwd car in europe for a while ( still owns the car) crx running low 10's..
but he's so busy moving now so he has little time to help me with my setup.. thus why im asking it here..
here's a link from him racing think you will enjoy that :
http://www.youtube.com/watch?v=rxF4YNoJ02g

anyway im not completely nub when it comes to engines ive been working on honda's for years but never really got into turbo's so every bit of info/help would really be appriciated..
( i'm searching for turbo forums, google links myself to learn more but i noticed there are alot of experienced ppl here to so HELP ME! lol)

thnx in advance guys!!

 

Go with the gt3076R. Don't waste your time with the 71.

 

oke its clear the everyone favors the 76 over the 71 but please when you say go with the 76 tell me what the reason is behind your opinion. i know now the 76 has more hp potential but is the 71 such a bad turbo to start with??

and what other types of turbo equals the 3076 in performance.. ?

 

If you can get a deal on the 71 then do it. Sure, if they're the same price go with the 76 but you can't argue with a cheap turbo. There is nothing wrong with the 71, it's a great turbo just not as good as the 76

 

yeah well the turbo goes for 450 usd.. wont get a 76 for that money..

 

For sure Id buy the 71 if I could get it for that price.

 

you're good with a GT3071R. Not everyone needs just horsepower. I know its an American thing, but the GT3071R is extremely responsive and I think you'll like it

 

yeah thats what i love, when i hit the pedal i want to be thrown back in my seat and not wait for it to kick in..
but what can i expect of this turbo.. spool? hp? powerband? remember its gonna run on a stock b16 for a while..

im not planning to pull it in the 8+ k's rev everytime on a stock block with lotssss of miles on it.. its just to get used to it till i get the rest of my engine together.. but i wanna know what i can expect from this turbo.. i saw that you can get 400 out of it on pump gas.. so that would seem like a nice mark..

 

Well, generally speaking, the response characteristics of the GT3071R are going to be a bit better than the GT3076R (simply as a comparison). Though both turbochargers were originally designed to work as twins, the 3071R was designed to run at a bit higher pressure on average to make good power while creating a broad powerband and higher torqueband starting a little earlier in the rpm range than the 3076R. This is due to the smaller compressor wheel and the exhaust wheel shared with the 2871R. what I like about it is the fact that it is one of the more fun turbos that are used on Hondas in circuit racing. for engines that are staying within the 300-380whp, and have over 9.5:1 static compression, its almost like a supercharger, with a bit more top-end kick.

Being in the US, I would have used the GT3076R. Not for the power aspect, but because with our larger roads in general, we can use the midrange torque a little higher in the powerband to take advantage of the higher rpms. For smaller roads like in Europe, that is not as much of a necessity. Your goal is a bit more lower end torque, something the B16 lacks. This is why I feel this is a better choice; it gives the B16 that normally has a disadvantage, a new one.

 

well i couldnt have said it better.. thats exactly what i had in my head but couldnt put it into words.. the roads here are narrow, alot of turns and twists, you have some straights but thats only highways to big cities.. since my car is gonna be a daily its gonna see the city alot more then the highway.. so quick spooling and fast response really would be nice!!

but 9.5:1 is a cr you would advise me to use with this turbo? and will this work with "for example" a gt3076 IF/when i decide to upgrade.. i see alot of ppl using 9:1 CR with the 76 so i wonder if 9.5:1 would be to much

Wouldn't want to tear the whole block down to replace the pistons so would be nice if it would work with both the 71 and 76

and what cams would you suggest, maybe you know of cams that work well on the 71 to put it to full use..

 

Hell. keep 10.0:1 if possible. the higher compression helps with off boost acceleration, provided that tuning is good with good RON rated fuel. Otherwise 9.5:1 is fine. Stop thinking like the Vauxhall and Evolution guys. Its ok to have some good static compression to get that engine moving. (I'm at 10.2:1 myself, and wouldn't trade it for the world.)

For cams, VTi-Rs (GS-R) or ITRs would be just fine. No need to go to Skunk2 or Brian Crower (*cringe*)

 

yeah i was thinking ITR there's one for sale here and they look very nice but for now its either that or the turbo.. im thinking to get the ITR IM too, i hear they do a great job but there very rare to find.. is a GSR IM good too? in comparison with the ITR IM?
i have a b16a2 btw (gonna run this setup in a del sol)

and i spoke with that friend of mine and i asked him where i could best do some headwork, his answer was that i DONT have to do anything with the head cuz i'll only **** the head up.. He said headwork is not necessary when going turbo but you can do MINOR changes..
Now i dont wanna doubt what he said cuz this guy has waaaaay more experience then me AND owns a monster.. but i still wonder WHY he told me that

Would you have an idea of why he tells me NOT to do headwork.. and with minor headwork he meant changing valves springs etc..
wich valves/springs would you suggest for this turbo? see alot of ppl using ti(titanium?) retainers *correct me if i'm wrong*

i also read ppl oversize their valve ports of sum (0,5mm / 1mm) i guess thats to allow more air to flow into the combustion chamber?
well i dont know if i red that part wrong so please do correct me if im wrong.. but this WOULD mean headwork..

I spoke to the guy selling the turbo again.. well the turbo was in good condition that i forgot to ask how many miles he did with it, i asked him yesterday and he told me he had 40k miles on the turbo already.. now i'm just guessing but ist that ALOT for a turbo? i'm gonna get it checked before using it but i was wondering how long a turbo will last.. it has veryy little shaft play, only to the sides and it isnt moving more than 1mm NOT touching the housing at all.. what do you think? go with it or search another one..

i found a precision 5031 too i dont really know the specs of that turbo but something tells me that the gt30 would do a way better job.. even though i know precision uses garrett parts.

sorry for assking so much but i dont wanna make the wrong choises, better be safe then sorry

 

I come also from europe (Germany) and my personal impression of the 3076 is not as good as the 3071.
As Shodan said, there really seems to be a difference in thinking between the USA and Europe.
In our area we got a lot of streets with short straights and a lot of corners. So I would decide for the smaller turbo.

We buildt a lot of setups for customers in the past and to be true the setup that made the most fun on public street, tight corners, little uphill, little downhill, sometimes circuit racing was a GT28RS on the B16. Car made "just" 320hp but was really fun to ride.

If you need help feel free to contact us.

 

Well i've talked to my friend.. and he advised me to use either a gt35 // sc61/62

His reason for saying that is the following:
My car is gonna be a daily and buying a small turbo is gonna put my car under boost pressure most of the times when im driving.. even if im not racing but its gonna do its job by boosting my engine anyway..
That would result in high gas mealage, shorter engine life / more maintenance.

Buying a bigger turbo is going to let me drive without stressing my engine in lower rpms but when i hit the pedal the power is there.. honda engines are rev happy so they will hit the 5/6k rpms quickly allowing the turbo to take over from there..
So driving around will costs me less gas and less maintenance overall..

Build cost will be higher but i can easily upgrade to more HP with the sc61 / gt35 when i want to.

discussed the pricing of the parts im gonna need.. almost gave me an heart attack when i heard the price of the header, that only is gonna costs me 750 euro's = 945dollar

He said american headers wont work!! peakboost etc etc are all trash over here cuz they all break, he was peakboost dealer and he stopt cuz he had alot of customers complaining.. He told me it has to do with the weather over here it varies so much everyday and driving around in a turbo car here really needs a little extra.. (yesterday it was sunny and nice, now its cold and alot of fog w/ rain)

So that would mean for me:
Buying a sc61 / gt35 and drive n/a till i have the parts to rebuild my engine..

sounds like a project to me..

Gonna start thinking what parts im gonna buy..


ANY recommandations, what to would be a + to buy and a - to dont..

anyways going for the standard:

Turbo/engine:
-sc61 / gt35
-81,5 bore
-eagle rods
-Wiseco pistons (CR 9.5:1 / 9:1??)
-custom header
-tial WG
-3" DP straight all the way to the back

Head:
-ITR IM + TB (or another if i cant find one)
-ITR Cams
-Titanium retainers
-Springs ??

Fuel:
-Injectors (gonna deside that with the tuner)
-Walbro 255
-Lines / Fittings
-Stock fuel rail w/ FPR

Trans/Parts:
-ACT XTREME Clutch kit
-Flywheel (??)
-B16 Gear box

Tuning/Electronics
Hondata s300
Aem wideband

 

I couldn't disagree more. There's no point in getting a LARGE turbo just so you can think that running only a low boost pressure will mean less maintanence overall. If the turbo is out of its efficiency range, your response in Holland will be awful, and the car's characteristics will be like a "light switch"... No power from 2300-4600rpms, then BAM!! all the power comes in at once. That type of logic really can't work in Europe with the smaller roads, and tighter corners that you have there.

Also, less boost from a BIG turbo (i.e. 8psi) doesn't mean there's any less maintanence from a smaller turbocharger running 10-15psi. "low boost" is relative. The maintanence to the turbo and engine will be the same. You'll just be less happy with the bigger turbocharger in an environment such as Holland or northwest Europe. By the time you catch up the other cars, you'll be out of road, in many circumstances

Correct, the power will be there, but will be a bit uncontrollable because it will be there all at once. Gas savings and cost is going to be from your tune, your ability to control your driving, and the power you plan to make. A stock engine with only 280-300whp in a smaller turbo will keep the engine in the right powerband, keep torque more flat, and actually use the engine's rpm band MUCH better than a big SC61 turbo on a smaller road. Don't use American thinking in Europe. it doesn't work.

That turbo is good to over 600whp. Are you being realistic in planning a build to make that much power there? Is that the real goal of your car? PLan your turbo choice over the USE of the car and not just "more power later". You may be satisfied with only 350whp-400whp, not 600whp.. if that's the goal, then the car needs to be prepped for drag racing only.

Now that's just ridiculous. the materials used for the exhaust manifolds from Peakboost are very quality using Sch. 40 steel. you don't have weather that's all that different from the U.S., and we haven't had anything crack from the last 6 years. NOW... if your friend tends to tune the car in which EGTs are extremely high and running a bit richer than even most, ANY manifold can suffer from some issues over time. At the MOST, perhaps it was one of Ken's first manifolds from years ago when the better materials weren't available to anyone. But I wouldn't hesitate to use a Peakboost manifold in any weather climate. I'm sure Ken can chime in and state his materials and what he goes through to ensure that the manifold doesn't crack. With his warranty policy, there shouldn't be a problem.

Stop talking to this friend.. He's not thinking of your needs.just what he would do with your money in the states for drag racing.

 

gt3071r is a nice unit, i ran one on my pulsar gti-r (sr20det) at 1.6bar it made 418bhp at the flywheel on hks 264 cams.

im fron europe aswell (london) and im running a trusty t3/t4 57trim and i find it just right for street use, its pretty responsive and certainly packs a mighty punch when it hits boost

although i must admit i have been thinking of upgrading to roller bearing turbo soon but im not sure which one yet.

but yeah, gt3071r is a great turbo, if you can get it cheap then go for it.

 

BTW your friend sounds like a complete dick..

 

hmm wel oke thats clear! what he said did seem logical at the time and knowing he's a respected good tuner and one of the best on the strip there is here in europe i dont doubt what he says..

but with that all apart im gonna build the engine anyway.. dont want it throwing rods if i plan to max out the turbo, i know myself to good and im gonna get bored with 300hp just because i know i can get more power out of it. already had a block that threw a rod at me in the past..

but with all that being said.. i havent heard no one talk about the precision sc5031.. ive only compared the 2 turbo's by spec and it seems like its almost equal to the gt30

the sc5031 is almost brand new and the gt30 has 40k miles on it so i dont know if its reliable for another "xx"k miles..

both are capable to up to 4xx hp and precision uses garrett parts but i wanna hear if you guys know anything about this turbo or ppl running a setup with the precision on it..