I'll be there regardless but really hoping to take this I'll probably be sleeping in it lol

 

There's a bit of a trade-off to be made with pipe sizes:

- Bigger diameter = slower velocity and large volume so will see you more lag, but lower pressure drop
- Smaller diameter = higher velocity and lower volume gives less lag, but higher pressure drop

The other side to it is of course that ultimately you will not be able to push anymore air down a narrow pipe due to pressure-drop/resistance increasing with velocity/volume, so you'd have a response like a wrc car with decreasing torque and slowed/flat power curve beyond whatever the critical rpm/boost point worked out to be.........and resulting in compressor stall quite possibly.

Chris

 

I have a 2" and a 1" run from the turbo to the engine, the plan was to only use the 2" for now and open up the 1" if I needed when the boost gets turned up, would it make sense to use both pipes from the start so I can deliver low pressure high volume (relatively speaking) from the 2" and high pressure low volume from the 1" at the same time? Both pipes go into a collector with a 3ft run of 2.5" pipe to the engine so it'll have time to normalise

 

I tried my best to get it to FITP, it was nearly back together but needed a few more hours so we took my mate's Ka

This weekend was spent sorting out an issue with some captive nuts in the chassis, we had to cut them out and weld a new plate back in, this is how it looks now also sporting the new oil cooler, it'll all be back together for the weekend so I can crack on with the turbo again

 

Bring it to the performance vauxhall show weekend after next at santa pod, I can probably even find you a decent stand space for it!

 

Are you there all weekend? If the weather is good I'll be up early doors Sunday I really want to put it on the strip whether it's turbo'd or not

 

Fantastic read and project. Well done. Look forward to reading the updates

 

Yes mate im there all weekend

 

Top progress.How is the turbo coming along.

 

Cool, I'll come find you

 

Not done much TBH, been busy putting the 3 litre in but I'll be ordering all the silicon tomorrow so I can crack on

 

I thought you'd died in it!

 

Just like you thought you died in the bull run, moooo! lol

I might be up your way next weekend, I'll give you a shout butt!

 

Hi mate,

It wouldn't work like that - pressure-drop / backpressure would be probably reduced by using the two pipes as you are offering additional cross sectional area compared to using the one, although pressure drop for a 2" and 1" pipe would be more than for a single pipe of equivalent area. The pressure drop / backpressure would also depend on the design of your collector.

I would suggest the best thing to do is work out the air consumption of your engine for the power you are looking to produce and the pressure you need to see at the manifold.

You can then calculate for the pipe sizes you have, what pressure drop would be seen across the length of pipe @ the flow rate calculated previously.

Adding the pressure drop of the pipe to the pressure at the manifold would tell you what the pressure at the turbo needs to be, and you also have your consumption/flow rate. Using this info you can look at your compressor map and see whether the turbo will work without surging or stalling/struggling.

Obviously you could look at the figures with pressure drops calculated for different sizes of pipe and pick the best to suit your turbo...

These calculations won't tell you much about lag, but in general, you'd have least lag with a compressor wheel/housing combo that can provide your air flow/pressure requirements through the smallest pipe (due to their being less un-compressed volume in the pipe)....BUT that might not necessarily be a turbo that gives you the power band you're after so there might be some compromise required!

Plenty of sources on the web (and probably online calculators) for the equations you need to work this stuff out

P.S. looking good - can't wait to see it finished!

Chris

 

madness utter utter madness ,love it

 

I've found an online calculator for air pressure drop but of course it needs the CFM so I'll try to find the specs/compressor map on garret's website then work from there Cheers for the steer, I'll have fun working it out Im sure lol

 

I've not done much recently on the turbo side so I decided to pull my finger out

Boost pipes, collectors and some exhaust stuff




Poked a hole through


Mocking up the pipework


I'm doing a little rewiring in the bay while the engine is out, fingers crossed I'll get the 3 litre back in this coming week and get some miles on it without the turbo so I know the engine is sound then finish plumbing the bad boy in!

 

you sir are a true mentalist... I salute you

 

Hey great project you got there just a little question though with the air filter being that close to the turbo is there not going to be heatsoak problem with the filter sucking hot air?

Anyway keep up the good work.

 

coming along nicely
we gonna see this at ford fair???????

 

given that it'll be exposed to air passing by the car i'd have though not?

 

news?

 

I thought I'd be at FITP but couldn't finish it, I don't want to jinx saying it'll be at Ford Fair lol

The head gasket is completely fucked on this 3 litre so it's coming apart early next week and these bad boys going in, CR will be 8.4 to 1 if everything is as it should be:


Progress has been really slow but as soon as the HG is done I'll be taking a week off and probably cane a credit card lol

Fair play to Ferriday engineering, I phone them Monday and they turned up today even though he's broken his arm!

 

Another little update..

Boost pipes mocked up retaining the MAF as it'll be on the standard ECU until I can put some cash together to fit some aftermarket management I already have


Pipe goes behind the master cylinder..


... through the bulkhead

 

its just mad how it all fits in a tiny little KA!

 

it doesnt.... lol.... thats why its a remote turbo lol

 

Brilliant mate, a proper 1 off

 

Heads skimmed ready for a clean and refit, I'm getting excited now

 

you maniac, love this project

 

coming along great keep up the good work

 

Little update

Totally knackered (literaly in bits) head gasket


Looks like it's been knackered for a while, there was a lot of pitting


Had the head skimmed then pressure washed


Ive not ventured into the world of timing so I got my mate to fit the spacer plates, new head gasket and do the timing


As the heads have now moved slighty we had to modify the inside cam cover to be able to bolt it up and also peel back the tops allowing clearance for the cambelt

 

I've fitted an oil cooler, radiator for the coolant and the water pump, I'll hopefully get it the oil and water plumbed in Monday












I've put a ball valve in the 1" pipe so I can play around with the air supply characteristics

 

I didnt think it would more get more ghetto than it was already, but fuck me its getting worse

 

Awesome project

 

I'm reaching new levels of ghetto by the day!

Have you got a spare recirc dump valve?

 

I've finished the boost pipe to the intercooler and put the engine back together, I'll find out if it runs tomorrow night

 

crazy project.love it.hope it runs for you mate

 

I had a bit of help from my Nephew too...

http://www.youtube.com/watch?v=J0UDXSMt-yM

 

Lol @ the 5 year old welding.

Coming along nicely though mate

 

updates?