MarK4

Just wondered how much boost you can get away with on the above spec providing that it is live mapped (probably Stu or Ahmed). I was hoping to run 2 bar held with a .63 and water injection.

1. Is is possible or will the standard compression limit the amount of boost I could run?
2. How much boost from the T34 (.63) roughly will it take to max out the greys?

Thanks in advance

Mark

alan rainbow

no problem karl will map grays 2.2 bar on standard comp

MarK4

2.2 bar Don't suppose you know what the lag would be like?

Is that 2.2 bar held or spike? I take it the greys are fine at that boost pressure.

Disabled Account

Mark, I would not want to use more than 26 PSI (held) boost on a standard T34........Maybe a T34 with 360° bearing could cope with more boost, say 28 PSI (held)........Either wat you would be working the turbo very hard.

MarK4

Thanks for the reply, it will be at least have a 360 thrust if I can afford it it will be roller bearing. Would it be ok to use standard cams and head?

What head gasket should I use WRC?

TIFF

I run a T34 .63 and Greys on standard comp, Been fully mapped by Karl and it spikes 30psi and holds 28psi and it is awsome

It reaches Full boost at 3300rpm so not as laggy as what you would think IMHO

Stu @ M Developments

iTrader: (12)

Heres an example:
https://passionford.com/forum/viewtopic.php?t=55787

TIFF

I run a WRC Mountune 4 Layer Head Gasket

Milko Pete

I used to run standard turbo, GpA gasket, 28psi held, did 380bhp and 398lbft, felt like a missile!

MarK4

I didn't think a gpA would be sufficient? Think I will go wrc multi layer..
Full boostby 3300rpm is exceptional

Cheers for the example stu will check it out now

Rs Craig

ALL I WILL SAY IS THAT I DROVE GUS'S CAR WHEN DONE IN THIS SPEC WITH STU AND IT USED TO GO LIKE F*CK now it has a bit more top end but back then it killed a M3 evo no probs gus runs a cometic head gasket as so do i and that aint been a prob yet its the best grey's conversion I've been in and ive been in quite a few

Anonymous

how much boost you peak at isnt going to effect lag really, as you can still wind lots of timing on with the map at the bottom end of the boost spectrum.

higher cr like this will be far less laggy than if you dropped the cr too.

MarK4

Well I think I have decided what spec to go for put it tha way

Do you mean the new shape M3?

TIFF

I have raced both old and new shape M3 in mine and put it this why, they werent to pleased

Deano

Tiff does you car seriously make 30 PSI by 3300rpm ?

TIFF

Yes Deano, Full boost at 3300rpm

Deano

When does it start tailing off mate ? and what boost is it when you change gear

TIFF

It peaks at 30psi at 3300 them will hold to about 4000 where it then drops to 27-28psi and will hold through the range

Deano

Can I have a go

TIFF

Yes mate, pop round

Deano

Ill hold you to that

And what you mean pop round , you aint local you know

TIFF

I cant wait to see this guy walking up my drive

Deano

YOU FOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOKIN COOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOONT BASTID

TIFF

Paul Eggleton

I'm in a dilema wether to go for this next or save for the proper 400+ conversion

RANJ

why have 400 wen u can have 500

TIFF

Paul
Why not get it done now until the engine needs a rebuild, then get 500 ponies

CraigN

i agree paul

t34 and greys goes like fook

i dont see the point in bothering with any more in my opinon of course

i cant use what i have on the road these top speed stuff doesnt interest me and car is great (will be when i sort handling and tyres) on track

good enough for me

Paul Eggleton

I know what your saying fella, coz the transmission is going to need to be upgraded just the same at 400 as if I was running 500. I don't drive like a girl so i would break std tranmission with 400 .

Tiff, if it's coming apart for a h/g I'd go for the full monty and rip the lot out and rebuild, just to save on expense in the long run. Don't want to re-use the wrc head gasket

Rs Craig

yes new m3 shape

TIFF

I TOTALLY agree with you there Craig

chunny

But do you guys use your cossies everyday and through winter??

TIFF

I use mine when it is dry and a nice day

ImaRacing 700

...if your going 400 then why not go 500 but then saying that why not go 600 or better still 700 oh fuck it go 800 but hang on while your there go 900 or better still the magical 1000

peteh

iTrader: (3)

So yours is a standard build with the expensive head gasket, T34, greys, cooler filter and pipe tiff?

do you know a fiqure what it produces?

TIFF

Yes Pete, that is what i have

As for Figures i havent had it on a RR or anything yet as i am not too bothered. I will get it on when there is a shoot-out of some sort

But i would say it is around the 360-370bhp mark

peteh

iTrader: (3)

And it's not that laggy? wana driveable fast car, i.e not laggy, and if it sees off new M3's i'll be happy!

umm got me thinking, is karl not mapping at all now?

do you have any pics of your engine bay? pm if you like, also when do we send our money?

TIFF

My car makes full boost by 3300rpm so not that laggy really

I have still got to get some pics of the engine bay

ImaRacing 700

Its fooking laggy compared to N/A or supercharged!

TIFF

Tell a lie Pete, here is a shit quality pic i have