whats the best turbo for achieving 400 bhp or should i just go hybrid

I'll see if I can find where I read about it but apparently it looks better on paper than in reality. I have a non standard compressor wheel anyway:whistle2:
 
JonnyDerv said:
I'm at 420bhp 390lbs ft on a gtx2867r that's with cams and vernier pulley. I managed 404bhp 390lbs ft without cams and at a slightly lower boost.

From what I've heard, there's not really much difference in the gen1 and gen2, the compressor maps are very similar apparently.
Click to expand...
what dyno and what boost levels?
 
Dynocom awd5000 1.7 bar.

On a different map, without cams, stock pistons it made 397bhp at 1.8 bar on a mustang dyno.
 
Who mapped both times
Did you have your head built
Was that with water meth and what size injectors?
 
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CC tuning mapped first one at 397bhp. Sadly the oil pump **** itself. Chris there has done a few 1.8t gtx2867r maps, 407bhp on a 1900, 400 on his own before.

JBS auto designs rebuilt the engine to my spec, and mapped it, 420 bhp. Head is standard, only engine internals are Pistons, rods, cams and vernier pulley. Cams made quite a difference 6000 rpm upwards.

I've got the dyno graph if you want to see it :).
 
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:whistle2:This thread has amusing undertones, thinly veiled ones!
 
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Who? Me?

I'm fully aware of dyno lottery, hence why I'd take a dyno run on yours with a pinch of salt too ;) lol.

All depends on the dyno, and the day (my cc tuning runs were done on a 27C day, 397 was the best) but mine has always been around 400 mark so I haven't got any reason to suggest its an optimistic figure.

What's the best you've had from one on your rollers Bill?

Speaking of gtx2867r, didn't surperkarl have one/still have one on his s3? Internal gate if I remember correctly, T25 flange, 380bhp wasn't it? Who mapped that?
 
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JonnyDerv said:
Who? Me?

I'm fully aware of dyno lottery, hence why I'd take a dyno run on yours with a pinch of salt too ;) lol.

All depends on the dyno, and the day (my cc tuning runs were done on a 27C day, 397 was the best) but mine has always been around 400 mark so I haven't got any reason to suggest its an optimistic figure.

What's the best you've had from one on your rollers Bill?

Speaking of gtx2867r, didn't surperkarl have one/still have one on his s3? Internal gate if I remember correctly, T25 flange, 380bhp wasn't it? Who mapped that?
Click to expand...
Rick mapped mine.
 
audi upgrades
Thought it was, what did you end up with 380bhp? Internal gate t25 wasn't it?
 
JonnyDerv said:
Thought it was, what did you end up with 380bhp? Internal gate t25 wasn't it?
Click to expand...
Yeh .64 T25.
379.9hp 360lbs.
Mine spikes at 1.9 bar but falls dramatically to about 1.5 at redline (no cams, inlet to go in at some point).

I would expect +20hp in going external gate t be honest. Better flow, less temperature, more reliable boost. I think your figures are pretty bob on.
 
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Good figure, mines 1.8 bar, it did drop to 1.5 at redline on stock map sensor but I run a 3 bar now and hold 1.8 to redline.

On my graph the black plot is pre cams/boost increase, red line is cams and boost increase. I'm running stock inlet so it will be interesting to see what it adds on your set up :)
 
JonnyDerv said:
Who? Me?

I'm fully aware of dyno lottery, hence why I'd take a dyno run on yours with a pinch of salt too ;) lol.

All depends on the dyno, and the day (my cc tuning runs were done on a 27C day, 397 was the best) but mine has always been around 400 mark so I haven't got any reason to suggest its an optimistic figure.

What's the best you've had from one on your rollers Bill?

Speaking of gtx2867r, didn't surperkarl have one/still have one on his s3? Internal gate if I remember correctly, T25 flange, 380bhp wasn't it? Who mapped that?
Click to expand...

my dyno's accurate - which I cant say for many others.. or other makes of dynos
you have opportunity of free dyno to compare... No axe to grind or being pissy about it, just interested.
if you're not up for comparison thats fine..

415bhp on one which came in. but it was working very hard.
folks who ask me for 400bhp builds get told gt3071..... no worse spool (GTX all spool slower than thei GT cousins) but a lot less effort required to get 400+bhp from. A happier place to be. GT3071/0.63 423bhp from 1.4 bar, ideal for track users to bash away all day long instressed. (track car example )
 
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badger5 said:
my dyno's accurate - which I cant say for many others.. or other makes of dynos
you have opportunity of free dyno to compare... No axe to grind or being pissy about it, just interested.
if you're not up for comparison thats fine..

415bhp on one which came in. but it was working very hard.
folks who ask me for 400bhp builds get told gt3071..... no worse spool (GTX all spool slower than thei GT cousins) but a lot less effort required to get 400+bhp from. A happier place to be. GT3071/0.63 423bhp from 1.4 bar, ideal for track users to bash away all day long instressed. (track car example )
Click to expand...

Didn't think you was being pissy or anything Bill, I'd drop by if you were closer for sure. Be interesting to see what your dyno says. If we all liked/had the same things it would be pretty boring hey ;).

Gtx do spool slower, however it's not bad in mine, starts boosting at 3k, strong at 3.5k and full boost at 3.8k ish. Suits me well. We know the answer to lag is drop a gear ;).
 
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I am a little confused
I thought the whole point behind a gtx v gt turbo is that you get the same spool characteristics but better flow numbers up top
I have a eliminator gt28rs kit from atp my plan is to get the gtx2867r for 400hp target
This will have external wastegate on atp cast manifold
Am I going about this the wrong way ?
 
superkarl said:
Read the post directly above yours!
Click to expand...
I did but it said the gt3071 for better spool and the gt3071/0.63. So was just wondering which would be best on a daily driver cauae didnt think the one that said bout bashing it round all day long track car. Could it not be used on a daily aawell. If so then which would be best.
 
hydro s3 said:
I did but it said the gt3071 for better spool and the gt3071/0.63. So was just wondering which would be best on a daily driver cauae didnt think the one that said bout bashing it round all day long track car. Could it not be used on a daily aawell. If so then which would be best.
Click to expand...
The track reference, he is referring to it being better in terms of being underworked = much more reliable vs overworked high pressure smaller turbo. If it is good enough for a track setup, it will be more than good enough for a road car
 
RaulQTS said:
I am a little confused
I thought the whole point behind a gtx v gt turbo is that you get the same spool characteristics but better flow numbers up top
I have a eliminator gt28rs kit from atp my plan is to get the gtx2867r for 400hp target
This will have external wastegate on atp cast manifold
Am I going about this the wrong way ?
Click to expand...
This is the idea, but a lot of reading reveals mixed results, some fair better than others, but no engines are equal, nor are setups on similar engines.
The 2867 has a massively capable compressor wheel, but it's mated to a crappy turbine wheel and therefore doesn't always shine so well, although some people's experiences say otherwise.
The Gtx vs Gt comparison is better on the larger frames (30, 35), similar spool, better top end figures.
I think an EWG 2867 should do 400
 
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I doubt the gt3071 will fit my manifold which is designed for t25 inlet
(I don't really want to change manifold)
 
GT3071R on T25 is how it used to done before v-band won with its simpler/stronger design
 
snowy said:
GT3071R on T25 is how it used to done before v-band won with its simpler/stronger design
Click to expand...
No. Full size 3071 was always a T3.
A T25 variant was produced that used a smaller turbine wheel for the smaller exhaust housing, these were modelled gt3071-wg, which is what tuffty used on his first build. They're a compromise and in no way comparable to a proper 3071. The turbine wheels are really a step up and flow a hell of a lot more. That's evident in 3076 models making 500+hp.
 
Still a 3071
still available: Owen - ATP

not a good choice imho, but more chance of 400hp on a T25 mani/internal w/g than a 2871

ATP do kit to nobble GTX30XX's on T25 manis too
 
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RaulQTS said:
I am a little confused
I thought the whole point behind a gtx v gt turbo is that you get the same spool characteristics but better flow numbers up top
I have a eliminator gt28rs kit from atp my plan is to get the gtx2867r for 400hp target
This will have external wastegate on atp cast manifold
Am I going about this the wrong way ?
Click to expand...
except you dont get "better" spool on 11 blade wheels...
never seen it on many I have seen.
GTX Gen2 9 blade also slower to get going over lesser bladed versions, (IF) you are fixated on spool

eliminator as in k04 style?
good luck with that and 400bhp
 
hydro s3 said:
I did but it said the gt3071 for better spool and the gt3071/0.63. So was just wondering which would be best on a daily driver cauae didnt think the one that said bout bashing it round all day long track car. Could it not be used on a daily aawell. If so then which would be best.
Click to expand...
You are confused
GT3071 IS GT3071/0.63 in what I said... Not different units, the same.
and of course you can use one as a daily...
 
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