97 replies to this topic

[Anthony30]

You'll find it hard to stick with low boost! It's addictive

The reason I want to make the bottom end strong/reliable. I will take it easy at first, because It's a new engine, then pile on the boost over time. And a dump valve, because it has to be done, even if it's classed as 'chavy'. 

[jt19]

Dump valves are important to save the turbo from stalling. Which can supposedly break the turbines.

[Anthony30]

Playmini 2 inch.

 

[Steve220]

Playmini 2 inch.
 

Out of curiosity, is it 2 internal diameter piping or just the tailpipe and is it stainless?

[Anthony30]

 

Playmini 2 inch.
 

Out of curiosity, is it 2 internal diameter piping or just the tailpipe and is it stainless?

 

I assume It's ID. It's 2'' all the way to the backbox, and the tail pipe is 2.5''. The downpipe is 3'' at the elbow, then 2'', I believe. It's made to fit a 2'' exhaust.

[Steve220]

Im worried itll be too restrictive for the power Im after.

[Anthony30]

Im worried itll be too restrictive for the power Im after.

What spec/power you after? I'm told it's the exhaust to go for, and will have no restriction. The main point is you can't get much bigger on the downpipe. 3 inch would probably not fit between the tunnel and the gear linkage anyhoo, even if you could somehow fit a 3 inch downpipe. I'm planning on fitting a Fusion Fabs manifold kit. 

[Steve220]

From the calcs, 2" (1.75" ID) will be restrictive for the flow at 12psi (150bhp). I'm after a 2.25" OD mandrel bent system.

[Anthony30]

From the calcs, 2" (1.75" ID) will be restrictive for the flow at 12psi (150bhp). I'm after a 2.25" OD mandrel bent system.

Give it a go and see what happens.   Just make sure the downpipe will fit.

[Turbo Phil]

Plenty of folk make decent power on a 2" downpipe, but if you can fit bigger in go for it. You want the least possible restriction after the turbine & unlike a NA engine you can't really go to big on a turbo motor.

 

Phil.

[mini13]

Ive just done myself a 2.25" bore mandrel system, I was considering doing another to sell, I could look at doing one for you if you want, I have Tig stuff for stainless, and can stretch pipes to do slip joints.I did make the backbox for mine with a carbon can, but it was a PITA, next time I would just get a stainless box off the shelf, then its just a matter of geting a couple of 30 deg bends and sone cutting welding etc,

i dont have any good pics of mine, but managed to find these, it was extra tight being a remote box, rod change would be easier.  DSC_1511JPG.jpg   40.18K   5 downloads  DSC_1513JPG.jpg   46.75K   4 downloads  DSC_1512JPG.jpg   35.49K   2 downloads

 

 

 

 

[Steve220]

Ive just done myself a 2.25" bore mandrel system, I was considering doing another to sell, I could look at doing one for you if you want, I have Tig stuff for stainless, and can stretch pipes to do slip joints.I did make the backbox for mine with a carbon can, but it was a PITA, next time I would just get a stainless box off the shelf, then its just a matter of geting a couple of 30 deg bends and sone cutting welding etc,
i dont have any good pics of mine, but managed to find these, it was extra tight being a remote box, rod change would be easier.DSC_1511JPG.jpgDSC_1513JPG.jpgDSC_1512JPG.jpg

Wow! That's an awesome offer, Joe!

Edited by Steve220, 19 March 2018 - 08:36 AM.

[Turbo Phil]

What do you use to stretch the pipes for slip joints Joe ?

Phil.

[mini13]

essentially this setup,

 

https://www.ebay.co....4UAAOSwKXdabVuh

[miniallsort]

interesting read following the progress