318i M40 turbo 190bhp@8psi *Breaking*

[GeoffBob]

I'm confused by the fact that my last turbo wasn't much smaller but it had full boost at 2000rpms, and this one is 4000rpms

Which is why it is best to evaluate the compatibility of a turbocharger to an engine (and your intended driving application) using the compressor and turbine flow maps. Simply quoting the compressor and turbine dimensions tells you nothing about their aerodynamic properties and is insufficient information to say whether a particular turbo is well suited to your engine and application.

Also the intake temps are higher with the holset for some reason?

This is because your new/different compressor is operating at a point on its flow map that corresponds to a lower efficiency than where your last compressor operated. The compressor is thus putting more heat into the air that is being pumped through the compressor. Also, the higher you boost your inlet pressure the hotter your inducted air as a result of adiabatic heating.

[Gunni]

Log manifold is not helping the situation.

inducer and exducer information will give you a 90% right ball park info on the turbo.

[Ant]

what size is the hotside housing on the H1D ?

[chu346]

email them to me.
I think you´d benefit from a visit

Wanna get afew things done first like plumb the wastegate into the exhaust.

I'm confused by the fact that my last turbo wasn't much smaller but it had full boost at 2000rpms, and this one is 4000rpms

Which is why it is best to evaluate the compatibility of a turbocharger to an engine (and your intended driving application) using the compressor and turbine flow maps. Simply quoting the compressor and turbine dimensions tells you nothing about their aerodynamic properties and is insufficient information to say whether a particular turbo is well suited to your engine and application.

Problem is I couldn't find any info on it.

Also the intake temps are higher with the holset for some reason?

This is because your new/different compressor is operating at a point on its flow map that corresponds to a lower efficiency than where your last compressor operated. The compressor is thus putting more heat into the air that is being pumped through the compressor. Also, the higher you boost your inlet pressure the hotter your inducted air as a result of adiabatic heating.

Considering that this is a bigger turbo I hope that raising the pressure will put it in to a more effiicient area of the map

Log manifold is not helping the situation.

Not disputing this but can someone explain why?

what size is the hotside housing on the H1D ?

8cm.

[Gunni]

The turbo size you have requires a very efficient exhaust manifold,
a log manifold usually is not, as pulses coming out of the ports into the log may be hitting other pulses, this results in lost energy , something that could and would have helped spool the turbo.

My friends 325i turbo with a not to big not to small turbo can see full boost of 1bar at 3k while in higher gears, that turbo will do 450hp and probably is doing about 400hp now. He has a split pulse manifold wich is helping out immensely.

This is a similar thing your faced with. A turbo that requires very good flowing characteristics of the engine and assembly to not be so inefficient.

Your turbo sizing is almost spot on the same as a GT2555 from Garret and a 8cm housing is similar to a 0.57 A/R .

If you are getting higher air temps then your either running it on the left hand side of the efficiency islands, near the surge line, or there is a boost leak.

[chu346]

Not sure if you know this, but this turbo isn't twin scroll. I understand what your say though, but I want to keep this a budget build and my fabrication skills are not very good. So won't be making anything spectacular.

I think the best I could do would be the same manifold with cyls 1+4 how the are now and 2+3 in a seperate pipe going into the T3 flange. Would this be good enough?

[Gunni]

Ideally you always want to have "split pulse" , meaning that the pulses only merge right at the colletctor in a smooth action. But whenever two cylinders meet you need to enlarge the pipe just a tad.

Well at least you made the manifold. That´s pretty good and more then most can do.
When you start raising the boost the power will come on very nicely.

[chu346]

Car for sale or breaking now. Don't have time for it and could do with a cheap diesel instead.

Any offers PM me.

[appletree]

Wow didnt see that coming, was looking like you was starting to get it togeather...

Why the sudden change of heart.

[chu346]

Don't have time for it, it's a major distraction whilst i'm training to be a driving instructor. Right now I could do with a cheap diesel run about (on chip fat ) that I won't be spending anytime or money on. Once I get setup as a driving instructor and I can afford to run a second car I will get another E30 (that will be my 6th) and I'll be able to run a bigger engine, turbo'd of course and not worry about petrol prices.

[ImysE30]

Roughly how much money/work is required to finish it off?

[chu346]

Roughly how much money/work is required to finish it off?

Nothing much.

Install a washer bottle.

The bodywork is the let down of the car. The guy who fitted the bodykit did a bad job, and the paint is coming off quite badly.

[cypriot_boy_2k7]

u have pm

[ImysE30]

Roughly how much money/work is required to finish it off?

Nothing much.

Install a washer bottle.

The bodywork is the let down of the car. The guy who fitted the bodykit did a bad job, and the paint is coming off quite badly.

I saw it at the Tamworth meet

If i didn't have the cab, i'd be very interested. PM me what sort of price you are looking for

[chu346]

Not sure on price yet, loking to see what offers I get, but I won't let it go for peanuts cause I don't need to sell it.

[ImysE30]

I've been told i need to sell my cab before i can buy another

I'll keep an eyeout

[chu346]

I've been told i need to sell my cab before i can buy another

Don't worry about that!

What are ya? Man or mouse?

[ImysE30]

I've been told i need to sell my cab before i can buy another

Don't worry about that!

What are ya? Man or mouse?

Mouse when it's ya Dad

Had any offers yet?

[chu346]

Definately breaking now.

Someone make me a good offer

Other things that will be forsale:
Genuine tech 2 body kit
H+R antiroll bars
Z3 2.8 shifter
E46 steering rack
Cloth sport seats
Tech 1 steering wheel

[chu346]

I took the car to the dyno on thursday,



It was doing 8.5 psi average but had a spike of 12ish when the boost kicked in.

Standard M40 1.8=190bhp@8psi

[Ant]

I like the boost spike dude !

what a shame, you got bigger plans for the next one ???

[chu346]

If I don't sell the turbo kit I will save it and turbo an M42 in the future. The car had loads of little faults and quite a bit of rust and bad paint work so it's no great loss. But if I do get a good price for the kit, the next project will be a brilliant red M5x or M30 turbo with a 450-500bhp goal.

The two problems I had with this car was the fact it was my daily driver and that I was too tight/didn't have time to fit arp studs. I was running 14psi for a while and maxing the 32lb injectors, so must of been doing 230bhp+ I will miss that.

charlE30 came down yesterday, and considering that he has an M30 in his car I was quite surpised that he was impressed by the litte 4pot.

[cypriot_boy_2k7]

Chu can you remember what size the external wastegate was? Think the springs gone

[chu346]

Sorry I can't remember possibly 38mm.

[cypriot_boy_2k7]

Sorry I can't remember possibly 38mm.

No probs mate, Thanks