JS Manifold cracked

[ryan_s3]

It's the theoretical power of the compressor wheel that the yanks seem to quote.I'm currrently making 425bhp out of a 16g6 because the rest of the turbo is correctly spec'd.
You won't be holding 1.9bar at high rev's though steve i bet it's more like 1.5bar at redline.

 

[phil_m]

What would be a safe boost limit to run the TD05H 18G on and what is the peak they are normaly mapped to?

 

[ryan_s3]

running it hard i'd go 1.8bar peak tailing to 1.5/1.6 at redline.

 

[HTC]

HTC i think your getting confused,the FP comes with the smaller compressor cover not the larger td06 one on the blouch turbo.

You are probably right I'm learning some new terms here. I was under the impression that td05/06 refered to the turbine size. 16/18g ect refered to the compressor. I'm pretty much decided on this one, unless I can get a hybrid garrett to fit

Thanks for letting me know Phil. I had a look at the turbokits products.

 

[HTC]

It's the theoretical power of the compressor wheel that the yanks seem to quote.I'm currrently making 425bhp out of a 16g6 because the rest of the turbo is correctly spec'd.
You won't be holding 1.9bar at high rev's though steve i bet it's more like 1.5bar at redline.

You have a larger capacity engine also....correct?

 

[ryan_s3]

2 litre evo engine but they don't make any more on a 2.3 stroker engine, they just make the power quicker then the turbo runs out of puff/boost as the turbo can't push the air at higher revs.
td05h=exhaust turbine 8cm=exhaust housing size 18g=compressor wheel.
The size of the cover is not really denoted in it's name but as the stock td06 20g had the larger cover people tend to call them td06 covers.A 18g wheel in theory should make 10% more than a 16g6 wheel.

A mate has a hybrid version of my turbo with a 20g comp wheel,larger exhaust wheel in the same housing and it makes 30hp more than mine,so chucking in large wheels doesn't always mean loads more power in the same frame turbo.Also another evo made 550bhp out of a GT3076R and someone with a GT2876R made 405bhp flat,same comp wheel!! The smaller exhaust housing/turbine in the gt28 just strangled the turbo!

 

[Wilko]

18g is happy at 2 bar, It won't hold more than 1.8 past 6500, and wont hold 1.5 to by 7500 on standard capacity and big port head.
It'll make 30-40 more than a vf34, so about 360hp. I've repeatedly measured 39-40lb/min through the maf and it makes 360-370hp. The compressor is flat out.
The turbine may be strangleing it a bit, but not that much.
I've seen lots of 350hp 911's do a lot more with their 350 than 400hp (proved on rr's) evos have done with their power, yet they weigh the same. Odd that.

I'm fitting a gt30 internals to mine at the mo with 52lb comp wheel. If it makes more than 460 flat out, I'll be stunned. I'm sure I could get a 500hp dyno from one though.

 

[ryan_s3]

Running the turbo that hard will raise egt's immensely,the 18g is a good all-round turbo for a 1.8t.
the td05h turbine is not struggling at 350bhp i can assure you.
what 350bhp porsche are you talking about?Glens c4s which is around that power was certainly not that impressive on the 1/4 at inters.Lets not fall into a willy waving comp but 1/4 of 12.2 @ 112mph in my evo at 335atw on a dyno dynamics rollers .

 

[caney]

Running the turbo that hard will raise egt's immensely,the 18g is a good all-round turbo for a 1.8t.
the td05h turbine is not struggling at 350bhp i can assure you.
what 350bhp porsche are you talking about?Glens c4s which is around that power was certainly not that impressive on the 1/4 at inters.Lets not fall into a willy waving comp but 1/4 of 12.2 @ 112mph in my evo at 335atw on a dyno dynamics rollers .

ryan how come you claim to know so much about turbos?is it your line of business or something? .oh and 112mph terminal aint that impressive for 425bhp is it really. i managed 116mph with 375bhp before i fitted a bigger hotside.

 

[Wilko]

Ryan
112mph terminal in an evo is high 300's flywheel. It's fast. But 350hp 997's trap similar speeds with similar weight. Forget inters, it's 1/2 to 1 second slower than the pod.
Not willy waiving, but a true 430hp 1500kg car should trap 115-118mph.

 

[HTC]

So would an 18g with a td05 turbine spool similar to a VF34? td06 would probably be a little laggy on a 1.8 I assume.

Would love to know what power Hooch is putting down. He was trapping in the 12x mph zone I heard......impressive!

 

[Wilko]

18g (td05h) is slightly (100-200rpm) more lag than a brand new vf34. A few hundred miles later when the vf34 exhaust housing is cracked, and you loose 500rpm of spool, the 18g has less lag. It makes 1 bar by 3400 in high gears, and 2 bar around 3900.

I took my 18g off after 2 years, and the exhaust housing, other than the brown v power deposit, looks like new. No cracks, distortion or anything.

 

[ryan_s3]

Lots of ryan bashing i see!! Not really trying to impress anyone that is what the car does.
I'm just relaying my findings from working with a proper tuner.
tdo5h exhaust housing nearly always crack after time but it seems to affect top end power rather than spool.
I don't think you can compare 2wd to 4wd terminals or cars running nos.
For instance if i'm running high 300 bhp and your mid 300 then our cars are running similar power at the wheels so similar terminals,so what are your terminals at pod?

 

[ibizacupra]

back in 2003, 320bhp JS IHI's ibiza (mine) was 112mph terminal on 1/4, with a 13.4s 1/4 (lots of wheelspin off the line)

Hooches 126mph terminal is impressive for a car not running properly.

 

[ryan_s3]

right had a look at my slips and the highest terminal i have is 114mph when it bogged down a bit.
i think this is roughly right for a evo,weighing approx 1.4t on road tyres.
300atw ~ 110mph approx 390fwhp
320atw ~ 112mph approx 410fwhp
350atw ~ 116mph approx 450fwhp
380atw ~ 120mph approx 490fwhp

my guesstimates for a ibiza ,weighing approx 1.2t on road tyres.

275atw ~ 110mph approx 325fwhp
300atw ~ 114mph approx 350fwhp
320atw ~ 116mph approx 380fwhp
350atw ~ 120mph approx 410fwhp
380atw ~ 124mph approx 440fwhp

 

[ryan_s3]

steve if you did a 116mph terminal without nos you car is 400bhp+ at that point.

 

[caney]

steve if you did a 116mph terminal without nos you car is 400bhp+ at that point.

actually i lied,iwas running a 50shot at the time so bhp was circa 420bhp.not bashing you btw you just seem to know alot more just lately than when you had the s3

 

[ryan_s3]

Yep since working on evo's i've learnt alot more about turbo's and loads of other stuff.Also got involved in time attack and sprinting.

 

[Wilko]

Ryan
You need to look at flywheel. Ignore power at wheels (measured on a chasis dyno) No car looses more than a few hp through the drive train in reality. Your gearbox, differentials and driveshafts would melt if they did.
Dynos just compare the inertia of the wheels and drive shafts to that of the known (drum or brake ) inertia of the dyno. Mines been on 3 makes of dyno with the 18g on it and had 260-345whp yet fly wheel power has been 360-370hp every time.

Compare cars with the same fly wheel power to weight, and you'll see nigh on identical terminal speeds. I'm talking about known power production cars here, not tuned cars that have been on a chasis dyno lottery.

With 425hp in a 1400kg car (4wd) you should be hitting a ton in the 8 second region, which means by 12 seconds you should be near 120mph.

Now your evo is without doubt quick, but the 16g6 is 39lb compresser? so unless you are using non standard fuels, ar the evo engine is the most efficient known to man, it's not making much over mid to hih 300's

Mines not been to the pod with the 18g, but trapped 110 with the vf34 an 30-40hp less than the 18g, so it would have been 112-114. The car weighs 1455kg with me in it and 1/4 tank of gas. I'll never know now though, as the turbos off to be modified.

Not bashing at all ryan. It's great to compare other tuned cars. As steve said he trapped 116 (116.8 from memory) with 425hp in a 1450kg car (1540 with him)

 

[ryan_s3]

Thats cool then mate,we have put full set-up's on engine dyno's then dyno dynamics and whatever way you want to look at losses that is the difference i've quoted.I can't comment on other dyno's as maha whp figures are weird but they seem to get the right figures for flywheel .
what are the 3 makes of dyno and whp figures?i know the 345 was on dynojet.