Maniflow downpipe and large bore systems.
Turbo Mini Forums

I have a maniflow 2" OD turbo downpipe to fit to my t3 elbow.

From reading on here its best to perhaps have a larger bore system than this as 2" can be restrictive.

I've been looking at the playmini 3" systems, as these are the only systems I can find which are bigger than the 2" maniflow turbo system.

Trouble is, if I got a 3" playmini system what downpipe should I be using as the 2"maniflow one is obviously too small!

What size/make/model systems are people using with the 2" maniflow turbo downpipes?

Id rather not have to make my own custom system.

Cheers

First, are you sure the 3" doesn't just refer to the size of the tailpipe ???

If they do actually make 3" piping, how does it get down the tunnel, especially past the gear selector thingy ??? I'm having trouble with the 2" stuff !!!

Also, the downpipe would have to be oval to get past the pot joint as again, 2" only just fits.

And, you would still have a restriction at the elbow itself - you certainly couldn't open that to 3", getting close to 2" is a struggle. So, at the very minimum, you would need a custom made elbow.

Last thought - is anything bigger than 2" really necissary with the engine capacity and the T3's A/R ???

Sorry, not trying to be negative but that was my thought process when I started buying/fabricating mine.

Schrödinger's cat - so which one am I ???

Not at all Rod thats what I wanted to hear!

On another thread Steve/Benross was saying how he was getting 6ft swirl out the back of a 2" system, showing perhaps a restriction caused by bore size.

3" does seem massive so it must be the tailpipe size, not the front pipe.

As per your thread a while back, about making your own stainless downpipe, I've also been looknig at the fletcher 2" systems.

But I am wondering if these 2" flether systems will work along with the 2" maniflow dowpipe without alterations being made, i.e the fletcher system being "un-flared" at the manifold end, as most y-pieces are flared to fit over the front pipe. However the 2" OD maniflow downpipe isnt flared to fit over a 2" front pipe like a LCB's Y-piece!

So this will just mean the two pipes but up against each other, which i'll have to find a way round!

So i'm guessing the front pipe in 2" mild steel maniflow turbo system, is flared at the manifold end to fit over their 2" turbo downpipe.

Such a pain if you want to have something other than maniflow from the downpipe back!

But there must be ways round it, as people use playmini systems, meant for a y-piece on their cars, but I guess they must have a custom downpipe?

Schrödinger's cat - so which one am I ???

Spent a lot of time and money on this myself and ill say this 2.5" straight through on a single box beats all other systems I have fitted. Designed this back in 94 spent months fitting systems to my car and this set up won by a mile! had to source the pipe and get it bent to my design though.

Ended up giving the RC40 systems away, I got tourque all through the rev range and she was ultra quiet town driving until you stamped on the loud pedal then she boomed.
Good hunting!

Own the day

Edited by Rod S on 30th Oct, 2008.

Schrödinger's cat - so which one am I ???

Think I'll just opt for the maniflow 2" system, will save me hassle!

Own the day

The Playmini Big bore exhaust is a 2" system with a 3" tailpipe. Well its not actualy a 3" tailpipe, but a 2.5" tail pipe with a rolled end that has a major diameter of 3"

Playmini do a 2.5" system, check the 16vminishop, but they are not cheap!

Hi,
2" is the biggest bore you'll fit without major mods. I think Benross was referring to the silencer being restrictive rather than the bore of the system?
I've got a 2" Play Mini system so I hope that'll do the job!
Going to fit it up tomorrow when I get the turbo back, I've just collected a flexy joint to join it to the downpipe :)
Cheers,
Gavin :)

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Cool thanks for that guys, think I'll order the maniflow turbo system and see how it goes, perhaps change the silencer later on!!

i wasnt sure what happened with steve's maniflow back box, but i can see right through mine, so def no restrictions in there...?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

rich, use the maniflow 2" down pipe system buddy and the pipe right up to the back box.. this is good for powe outputs around 225 bhp with out ristriction.

use a play mini 2" back box, this will more than get the job done.

wrap the whole system from the clamp to the back box in wrap and leave the back box with out wrap!

the problems i had was using a maniflow back box which strangled the motor big time

Oki doki thanks for the info Steve!

Do the playmini back boxes fit straight over the maniflow front pipe? Or is it the same story as per the downpipe/front pipe connection?

The Playmini 2" link pipe is 2", its not swaged. I thought the turbo downpipe was 2" Swaged? so the link pipe would slip into the down pipe?

correct sprocket

I was thinking of getting the maniflow front pipe. which obviously is swaged to go over their downpipe.

Then use a playmini back box, which from looking at pics is swaged to fit over an un-swaged front pipe at the back box end? Unless the maniflow front pipe is swaged at both ends?

Starting to confuse myself i think.

All ive done is use the standard t3 downpipe with the elbow jobby on, then put an enlarger on to increase the size from 2" to 2 3/4" used stainless pipe all way to the back and welded a rc40 tail pipe on the end to make it look nice.

So i have no back box at all. Howver for Mot purpose i have slid an old back box over the pipe and welded it in position.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

u blatenly wnt a 4" syst on it! thts wot the scooby chavs use init!!

A pair of Dust bins perhaps

Dust bins are all plastic around our way now.... Surely they would melt ????

Schrödinger's cat - so which one am I ???

Hi,
Following an angle grinder incident this evening, my Play Mini system now looks like this..



Cheers,
Gavin :)

Edited by Bat on 1st Nov, 2008.

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

gav, red cross galore here mate

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

same here...

why would you turn your exhaust system into a red cross??