Is that in 230mm or 240mm flavours?

 

What's it like to drive with it?
Tried an EVO with a twin plate before and i didn't really like it TBO.

 

Callum, it is quite small still, probably about 52 lb per minute, fairly similar to most of these "450 BHP" sized P20/Garrett hybrids. Probably nigh identical to what you had on your 7?

 

Sorry David, oil pump. Correct?

Don't ask me about oily bits, it will probably all blow up tomorrow at the grand old boost level of 18 PSI

 

at 7499rpm

 

Still on the 5speed so whatever size that equates to

It drives fine Had to get used to the pedal feel at first and had a problem with a sticking pedal but that has since been sorted Its really quite light, quite firm at the top but then the pedal just falls away. Bite is really progressive and the same sort of feel as a standard clutch. It will start to take up low to the floor then start to bite midway, Once fully engaged it clamps with some force, and no take up at all

Thats the best i can explain it into words

Scott

 

No, it hardly ever sees over 6500 RPM! I don't drive every day like you think I do, honest Otherwise I really would have got speeding tickets rather than just a few near misses. I really should collect a datalog of a typical drive, you can even throw a few motorbikes in the route to tempt me

 

John

What results did you get from running the turbo at 1.5 at the top??? Just asking because i'm running 1.5bar all the way and it seems fine!

Scott

 

only because your too busy watching your daily driver wide band , while looking at the fuel gauge thinking how much daily driver methanol to add at the next shell station while tying to plug the lap top into that worn out daily driver select port

 

Scott, I've never run 1.5 bar at the top, it won't do it on the slack actuator I have, I wouldn't want it to, the EGBP would be sky high and the EGTs would be totally silly rather than just slightly worrying. I did reach a point (at 360 WHP on Delta Dash with NF and methanol) where it didn't gain any more power from extra boost. IIRC this was at about 1.3 bar at 6000 RPM. Best without additives is about 330 WHP at similar boost.

 

LOL @ t-uk.

Yeah it is an oil pump.

David

 

T-uk you are taking the ****, I fill up on average about 1 1/2 times a week. Seems to be doing about 20mpg. I fill up, I sling in 5 litres methanol. If I fill up with anything from 40 to 55 litres it doesn't seem to mind. All I used to have for gauges was knocklink and boost gauge. I have the wideband because there is no point in keep taking it out but it is not in my eyeline whilst driving, the other gauges because everyone seemed horrified that I didn't have oil pres/temp. They never show anything exciting anyway. I suppose that is the idea. The first warning I will get will be when a piston picks up in the bore, or the something explodes most likely. There is no point in being paranoid, if it is going to explode there is nothing I'm going to be able to have done to stop it anyway so I may as well enjoy it whilst it lasts. It makes the day to day drudgery a little less, wouldn't spend so much money on it otherwise. There is enough to worry about without worrying about a car blowing up next week.

 

you forgot to add the bit about phoning to get the methanol after 10pm , panicking that you had "no good sheeit left" and the plugs would foul without a daily fix

 

RB5SCOTT

And to mine by the weekend only problem is I will have to wait a few weeks before I'm ready to try it Didn't realise it was available for the 5-speed as well. Thanks for the feedback on it's feel

AlanG

Don't know about the diameter but it is due today so I'll measure it and let you know. The RCMS lightened flywheel for the 6-speed, at 6.0kgs, has been further machined, to 5.2kgs, to allow the twin plate to fit. The clutch is also 1.7kgs lighter than the AP single plate for a total saving of 2.5kgs. Compared with OEM bits there may be a little more as the original flywheel is around 8.5kgs? Just need to figure out how to loose the next 200+ kgs

JB

Thanks, & yes the hybrid I have is rated at 50lbs/min by TD.

LOL at the banter with T-uk

 

Cheers Callum.

Scott.
Interesting findings on the clutch. The only twin plate type clutch i have tried was IMO as bad as a paddle for take up, in that you had to give a little rise in revs when biting then let the revs die down as you fully released the clutch to minimise the judder.
Once mastered it wasn't too bad though you always had to give a conscious effort in starting off from rest but give the car to anyone else and they make a hash of it cause they've no experience with that type of clutch.
The shock loadings going throught the drivetrain as well are far greater than a normal "full circle" clutch. Think AndyF has some logs showing the loadings on transmissions, though this was on paddle type clutches.

Alan

 

PMSL @ T-UK, surely your not implying its no longer a "daily driver"

Conrad

 

Scott?

PM if you prefer.

 

I've removed the racing plugs because they were intolerant of light loads and rich mixtures. Now I can happily run out of methanol and not have it misfire when it gets to high 10s:1 AFR.

So I'm trying to make it a nice daily driver, was it a complete waste of time trying the plugs? Wouldn't have been if they were friendly and worked better. If you don't try you don't find out.

I don't want to be a tester for aftermarket products that are supposed to be researched, I don't mind pushing Subaru stuff to its limits though.

BTW, fuel gauge is indicating half a tank and I have 150 miles since fill up (including the methanol).

I make that about 22mpg, so I can't be driving it like a tit all the time, it has probably had only a few minutes of WOT on this half tank if that which is about 1% of the time it is driven.

 

the cheaper racing 8s may be what you want (the ones that Bob used R7235-8)

I will compare the iridium 8s to the retracted top racing 8s and report findings.

Paul

 

Job is going to get 7113-8 and 7113-9 to try also. He is also checking prices, but the 7119-9 were only £4 each, he has the invoice. He is seeing if he can get more NGK racing plugs at this price

 

cool..

You said you get missfires with rich mixture and low loads? where the plugs fouling?

David

 

No they weren't fouling that I could tell. I stopped it after driving at low loads and pulled the plugs, clean as a whistle.

When the wideband indicated richer than 11:1 it started to bog down horribly so I didn't persist beyond one run through a gear, it did pull through it but it wasn't nice, felt like about 30% of the torque had disappeared. On 7Bs it will still pull very strongly down to at least as low as 10:1.

 

Alan

Also with the clutch you can pull away at idle with no throttle, so quite drivable i think and the flywheel is billet

Xtreme Scoobies have done all my engine work and if not carried out some bits of it,(porting etc) they have managed the project throughout!

First time they failed, Xtreme scoobies were given a verbal procedure from the supplier to do them up "so tight"!!!!!!!!! They failed

Next time, Xtreme Scoobies went out of there way to find ARP's procedure, worked to this! They failed!

3rd time lucky, Xtreme Scoobies advised to use standard head bolts (capable of 500bhp anyway) or up to 14mm for even more safety

Then! When a piston melted on the standard 2.5, Xtreme Scoobies re-built (again) the engine with the RCM rods and pistons

Scott

 

Cheers Scott

Interesting about the clutch. Would like to try it some time.

Erm.. you haven't had much luck with engines then!!


Hope all goes well for you from now on.
You got a target you're aiming for?, or is it a case of "well we'll see how it goes..."

 

Ok Alan

1st target is to get this turbo running at optinum so about 430bhp, then maybe do a bit more suspension/diff work, then bigger more effecient turbo and run it at about 480bhp reliabilty and deep pockets pending

Scott

 

Alan,

AP twin plate arrived this afternoon. Plates measure 214 / 215mm in diameter.

 

Interesting.

Cheers Scott/Callum.

 

Scott

The first step towards reliability and power should be to turn down the boost on that turbo
Have you measured the EGBP ? Do you have any idea where you are on the compressor map ? I guarantee you are waaay off it. Anything over 1.2 bar at +6000 rpm on a 2.5 is asking for big trouble.

If you are indeed holding to 1.5 bar past 6000 rpm on a 2.5 then it is no surprise to me that you are melting pistons, probes and lifting heads !! You will be building enormous internal pressures due to the build up of exhaust gas pressure pre turbo. These high internal pressures also partially explain why your WHP is so much lower than John Banks who is running a similar turbo to you but at lower boost.

Andy

 

Andy

I don't know ask Bob Its not fully mapped yet so will we see what its like when its completed

FYI, lifted heads on the running period,in fact! within the first 10miles and obviously no boost. Melted the piston because it was stupidly lean where it was'nt mapped from the 2.0 to 2.5!!!!!!!

Scott

 

iON turbo arrived end of last week but it is faulty so Andy Forrest will kindly try to fix it. The compessor wheel is grinding when rotated with any side force on it. Perhaps there is a high spot in the compressor housing.

Gruppe-S header-uppipe gasket blew again - this time it lasted 300 miles with rather expensive thermiculite and 3mm stainless steel insert. Trying a 60mm copper crush washer next, if that fails will get them welded up when the new turbo goes on.

The rear left CV joint went a bit dry and spoiled the ride. The ill fitting Revolution exhaust was banging off the gaiter and overheating it.

Don't think anything else is hanging off at the moment!

Still some rather naff aftermarket parts on my car I am afraid!!