Mark Shead

I have mapped a S200 on a Escort and a Evo with very good results and both where T4 twin scroll.

Mark

stevieturbo

Surely on that GTX3071 there must be something else contributing to the very late power delivery ?

turbotrev

I thought that looked very late too!

Cheers Paul

Mark Shead

There is a graph on here of a Cossie sold on syveccs with a sim turbo do a search and compare that one.

Mark

stevieturbo

Here's an old thread making reference to normal GT30's for most part, non billet

https://passionford.com/forum/genera...076-laggy.html

Even they seem to be saying they're making lots of boost from 3-4k.

That GTX graph almost looks like it isnt making full boost until near 5k ?

I've only ever used some GT30's on 2.0 and 2.5 Subarus, and even on the 2.0 it's well on song by 4000rpm, 2 bar a little over 4000rpm
2.5 will easily do it below 4k, in a high gear usually by 3500rpm

Even post #45 from yourself Mark, the regular GT3076 looks to outperform the GTX ?

turbotrev

I'll try and have a look for that.
What's the difference with the gtx over the gt? The billet compressor wheel? Shrouded comp housing?

Cheers Paul

Jay,

iTrader: (4)

Im sold lol

crazycage

Im fitting a efr7064 to my drag fiesta at weekend and looking forward to laying the graph over the one from last week on a gt2871

3doorcozmess

So no mods just a turbo change and remap

crazycage

No mods just manifold and turbo

3doorcozmess

That will be interesting

R4N SS

iTrader: (6)

Mark, how much is a EFR 7670?

are there any mods required to fit. My exhaust downpipe is already modded to fit a gt30 series turbo

scoooby slayer

iTrader: (4)

that's exactly what I thought, im effectively running a gt30 with billet wheel on a 1.9 3 cylinder if you cut my engine in half, 420 hp 1.6 bar on pump fuel full boost by 3500 rpm, in 5th and 6th gear boosting well by 2500 rpm.




cossierich graph was quite impressive from what I remember aswell, ive checked but its gone from his thread.

Mark Shead

Here it is another one
http://bbs.rsownersclub.co.uk/showthread.php?t=560009

Mark

Jay,

iTrader: (4)

That looks extremely laggy

stevieturbo

I glanced through the thread and camshafts are mentioned, but it does look very laggy indeed.

It must be something other than the turbo, as surely they cant be that bad ?

jontysafe

Aaaagh marketing..... Without 'trading'! Must sell latest turbo!

My GT30 set up was far better than these graphs but I'm still changing as the efr turbos are pretty cheap now.

Mark Shead

Those who know me know I couldnt care less about selling the latest thing,
I did not start the thread either.

Mark

jontysafe

Don't get me wrong Mark business is business. No one understands that more than me. It's good for the cosworth tuning scene in the UK to have people like you constantly pushing boundaries and being an early adopter of advancing technology.
If it wasn't for you I doubt the EFR range would be getting as much of a look in as it is. It's testament though to how good the GT series " can be " that i managed to sell my GT30 for a bloomin good price. With the Euro as it has been I picked up the new EFR7163 in Germany for a great price.
Competition is a great thing and there are very many engine builders who don't frequent these forums or any others that are also pushing boundaries. We all end up using who we are comfortable with both relationship wise and price wise

turnover

On my old ybt engine it ran a gt35r with a 1.06 ex on standard 2wd manifold and at 2.3 bar was on full boost at 4800 rpm but did rev to 8800 rpm,so I'm unsure why the smaller gt30x version which I presume was on a 0.82ex is not as responsive,perhaps you could shed some light Mark or were these comparisons both on stock engines ie standard,but I do no people who have used the efr range really rate them

Mark Shead

You need to compare them on the RR as they can look laggy compared to others but its on the road where it is for the EFR,
The only GTX that I find any good is the 35 both versions on the GTX3071/76 in my testing is they are crap and the GT version is better.


Mark

turbotrev

That car on the RSOC site does look like its very laggy as well, but it is also still holding 550hp all the way up too 7500 revs.
Could it just be down to the mapping?

Cheers Paul

Mark Shead

The 7670 will do 600hp and only be about 200rpm later than the 7064.

Mark

turnover

Fare comment Mark ,and as you've tried them both your more qualified to comment on there performance,especially on the ybt,I no when the gtx series came out the difference shown on the overlap on Garrett site it looked impressive considering they are the same core size but obviously on the yb they're not but have you seen the same results on a high specked engine ie head work cams ,compression the usual,or have you not bothered and just used the bw

Mark Shead

I have done a few on the Evo set up also and again its on the 35 that worked well.

Mark

CossieRich

iTrader: (1)

My graphs are still on my thread. Will put them up on here

CossieRich

iTrader: (1)

Wheels





Flywheel

Rod-Tarry

'Can be' compared to what. Some Tuners still recommend a T4 & people still buy them. Im sure Mark don't give a monkeys dick if anyone believes what he is saying, he has more work than he can cope with. Judging by the EVO results im on for a 1000rpm better spool changing from a GT to a EFR Turbo. Its always hard to bring in new ideas, people get stuck in a rut & don't or cant except change.

jontysafe

Of course some people still choose GT series as we all have different budgets! Not perhaps always because they can`t accept change.


Changing to BW EFR means a few thousand quid as well, just for turbo, manifold and possibly external gate. Then if you want to benefit from Mark`s mapping experience on EFRs then that means changing ECU, loom.........
No doubt they are fantastic turbos but they absolutely won`t be for everyone.

lee2cossies

iTrader: (2)

Surprisingly there's not to much difference in cost from buying a new gt30 external wastegate set up and going down the Borg Warner route. It does cost a Ł1000 for the manifold but with a gt30 it costs Ł300 for the modified trouser section of standard manifold, spacer is Ł50 on top of that, plus u have to buy all different water fittings iv done both and there's not a lot more for the Borg Warner for the difference u gain.

Jay,

iTrader: (4)

Its right plus the way the EFR delivers the power plus the front end is better so the surge becomes lees of a issue

turbotrev

I do agree with Jontysafe on that matter of cost.
Mark wants to map it on aftermarket management as he won't touch Webber which means at least another few thousand pounds easy....

Cheers Paul

turbotrev

Anyone got an efr mapped on Webber??

Cheers Paul

lee2cossies

iTrader: (2)

Mines an s200 and that's going to be mapped on Webber for now. Harvey Gibbs has done some on Webber and they give very good results, the faster spool is plain to see on engine dump graph from a s200 he's mapped il try and find the graph. Probably not as good as going to modern management but the benefits are still gained.

turbotrev

Nice mate.
If it's mapped that good does the management actually make it worth the extra cost and using...??
What's the difference between that s200 turbo and the efr ones?
Still a BW right?

Cheers Paul

stevieturbo

S200 is a regular oil journal turbo, and may also have a cast impeller and different turbine wheel.

In otherwords, nothing much like an EFR lol

However, some of the FMW range of BW's do use the same billet impellers as the EFR range, but again non ball bearing, and with regular style turbine wheels

SierraCos2wd

this it with gt3582r @wheels 2.3bar

Caddyshack

What is 741 nM in torque? About 540 lbft?

SierraCos2wd

yes 546lbft

Rod-Tarry

Do it right do it once. I would wait to save the difference but im older & I except with youth comes 'I must have it now' .