tutuur

The fact the americans want low pressure actuator is probably because of the Honda boys running low boost with them. Geoff mentions this to everyone buying an EFR too so trust Mark!

turbotrev

Any news on yours yet crazycage??

Cheers Paul

crazycage

Yes I had it back on the dyno last Friday , the rear cank oil seal let go and killed the paddle plate . Turbo is Awsome tho all the torque was in before 4k .it's all sorted now and going back on tomorrow night

smiley

will be good to hear your views once youve had time to drive the car mate post back?

3doorcozmess

I've bought a 7064 and manifold but I'm going external wastegate I can't wait to get these fitted to my 2wd. after seeing Caddyshack graphs of this turbo on a standard engine I definitely think it's the way to go.

3doorcozmess

Any news crazy

crazycage

Destroyed a second clutch ,time for a twin plate

Mark Shead

Lol that means it's got some grunt

Mark

3doorcozmess

Doh, did you get to power run the car

crazycage

Yes but it means nothing ,clutch wouldn't take anymore than 300ftlb

Romain 83

hi,

i permit to show my last test 2 weeks ago with efr7670

it made 572hp and 500lb/ft peak 31psi and hold 28psi

SHaDoWLanDZ

I posted just the same Romain

So edit my post.

Hope on 98ron it will be about 540hp also. But first need to solve the idle map problem.
Cheers

turbotrev

Nice power!
So that's 572hp on race fuel not pump fuel?
What internal engine mods does that have? ie cams, headwork, pistons, etc?

Cheers Paul

SHaDoWLanDZ

If the car runs perfect this week i'll make a new topic with some details

572 is on 102ron, it is also pumpfuel as we can fill up here on the dutch/german border with 102ron.

Right now i'm running on 98ron but have small problems with overfueling on idle, Romain needs to fix it and then i go on dyno again

Cheers

nixon_2wd

1. They are expensive
2. Tuners don't know them / keep up with time / spend time developing so they rather fit ancient "well-known" turbos.
3. Engine regulations prevent turbos like this from being used in motorsport due to restrictors. Why would you want a turbo designed for use with a restrictor on your non-restricted engine?
Although, I am curious to why we (atleast I haven't) haven't seen titanium turbine wheels in motorsport yet.

The EFR is designed to be as quick as possible without restrictions->what you want.

Also, you need to compare apples with apples.

I think dynoing should be standardized, meaning that an engine should be held steady at 2000rpm (or something similar), then do a clean pull up to the rev limiter. Today, people are getting more aware of the meaning of torque, so tuners "adapt" by increasing the "hold" on their dynapacks to 2500 or even close to 3000rpm, "magically" producing SERIOUSLY amounts of torque as the turbo spools to nearly full boost before the pull is even started, just to get their customers happy (400hp @ 4000rpm). - then when the customer goes to drive it, he will never see that "response".

There are just too many variations going on with dynoing nowadays.

stevieturbo

Is there a boost trace for that ? It also looks as if it's achieving boost quite high in the rpm ?

turbotrev

I thought that too mate but didn't wanna say anything incase I got shot down....
Peak power at 5500 revs??

Cheers Paul

turnover

It's probably on a honda Stevie so vtec kicks in around 5k then they take off

Mark Shead

Peak power on his is over 7500rpm.

Mark

smiley

Great thread this

The Enigma

When is peak power on a YB running like the 7064 or 7670?

When would expect a 6258 to be at peak power?

Mark Shead

My spec engines tend to make peak power at 6.5k and on a stock engine with a 6258 I would expec it at 6k

Mark

The Enigma

Thanks for the reply Mark. I've currently got a T34.63 in my Saph and comparing the graph I have to the ones you posted on page 2 just show what an awesome range the EFR is. My T34 is peaking earlier than the EFR's at about 5.5k but is only making 200 at 4k and 120 at 3.5k!

Cheers Rich

SHaDoWLanDZ

Indeed 572.9 @ 7650rpm
and about 500lbft @ 5460rpm

turbotrev

Sorry my bad, I meant full boost at 5500 revs, isn't that late for an efr?
I know of gt30's and t34's making full boost earlier than that??

Cheers Paul

turbotrev

Has yours been rolling roaded on the 98 Ron fuel mate?

Cheers Paul

SHaDoWLanDZ

That is not the fastest spool indeed. I must say in the car it feels more alive or not laggy at all.

Paul, no net yet, having some issues with spark plugs at the moment..

When solved going on dyno with the 98ron fuel asap!

turbotrev

Sounds interesting buddy, best of luck and am looking forward to the results!

Cheers Paul

SHaDoWLanDZ

Will keep update on this forum

CHeers!

3doorcozmess

Crazy, shadow any news

Si

crazycage

I ran the car last week at pvs did a pb 11.7@123mph got my new twin plate clutch to fit then back to the dyno to finish mapping .

SHaDoWLanDZ

Not yet, Oppliger needs to come down for a little tweak in te map, having some probs here.. When solved, going for dyno/performance numbers!

(don't know if anybody on here tested 100kmh-200kmh (60-130?)

With some issues i'm doing low 8seconds.
Should be low 7 when everything is OK

3doorcozmess

How does the car feel on the efr? Sorry can't remember what turbo you was running to lazy to read back lol.

Si

crazycage

I've got the 7064 ,feels really good pulls hard and from low down .its spoiling better than my old gt2871 and doing more power with a lot more still in it

3doorcozmess

Crazy pull your finger out what's happening

Si

crazycage

Cars in bits , building roll cage and new dash

SierraCos2wd

This is what my new engine did with gt3582r t4 1.06ar 2bar boost 750nm 665hk @wheels

1300gt

iTrader: (2)

Can you fit a efr internal gate type to a standard 2wd manifold with no clearance issues for the cylinder head etc

The Enigma

Which EFR turbo are you referring to when you say "An EFR will deliver the same amount of air by around 3500rpm"? As surely a twin scroll 7064 and a twin scroll 9180 are going to spool at very different times, aren't they?

Stu @ M Developments

iTrader: (12)

Indeed they will... but you may note I quantified that statement as it being against a "Comparable T series" IE: You wouldnt try to directly compare a T34 to a GT35 for example.