unequal length runner exh mani

[Noddie]

you,re just shifting 2 cylinders aint you ed, so that they enter the collector with a delay, so that the 4 powerstrokes are close together (then a silent gap)
here,s a longer pipe test (which suits me because the current pipe is too small for the finished mani)

But the pipe length difference has to be huge no?

 

[frank]

But the pipe length difference has to be huge no?

needs to be the same volume as 1 cylinder i guess ed ?

 

[frank]

mk2 burble mani is sounding pretty damn good

 

[Enuo]

mk2 burble mani is sounding pretty damn good

View attachment 25923

That's just excessive
What about a moped style pulse resonator on one pair of cylinders?

 

[Noddie]

mk2 burble mani is sounding pretty damn good

Awesome...
Video please!!

 

[tomwest]

think you need to make them relative to eachother Frank! have Ex1 the same capacity as C1, then Ex3 is 2C1, Ex4 is 4C1 and Ex2 is 8C1. in theory the bangs will resonate with eachother on their joint tones (at 2, 4 and 8 revolutions), hopefully giving lots of nice "BURBLE"!

 

[frank]

nah, i,m just copying the scooby setup basically sounds a bit like a v8 when revved

 

[h701micra]

Not enough rev

Sounds like mine did when me and @enuo attacked it with a 6mm allen key in search of noise at JAE
We drew alot of attention and got told off for being too loud... after the fireworks at JAE of all places

 

[frank]

project burble definitely under way now

 

[h701micra]

What turbo is that Frank?

 

[frank]

What turbo is that Frank?

TD04 andy no work tomorrow, so should make some progress

 

[h701micra]

TD04 andy no work tomorrow, so should make some progress

Has a different flange to mine so I had to ask follow up qu... is the mounting hole distance 76mm? (Centre to centre)

We look forward to it

 

[frank]

65, 65, 55 mate (not an equal triangle) mitsubishi GTO,different to the scooby flange eh

 

[h701micra]

That be why I aint seen it. Say td04 think subaru
That's a fairly odd design

If you could mate the ga16 manifold to the cg manifold. You could use its 76mm triangle to mount a ford galaxy diesel tubby. They're 75mm iirc... easy turbo mount

 

[frank]

the flanges will be discarded mate, welding is far easier than bolting flanges together innit (more compact setup too)

 

[h701micra]

Fair point frank
Suppose manifolds are cheap enough to source

 

[frank]

Fair point frank
Suppose manifolds are cheap enough to source

aye, its gonna be the same as the current one, you only get wear in the core of the turbo eh (and thats still changeable ) similar to the VXR,s

 

[McMicra]

This project is full of win :L

 

[frank]

the flanges will be discarded mate

and this is what you end up with

 

[McMicra]

Need to get a drive by video of that previous video frank

 

[h701micra]

and this is what you end up with

View attachment 25975View attachment 25976

Each to their own eh frank

I like the bolt idea but that'd be the super fast service area part changes I'm used to

 

[frank]

progress report

 

[h701micra]

Audios not very clear
Makes my speakers sound funny

Sounds good from what I can hear though Frank

 

[frank]

sounds ok through my headphones andy

 

[h701micra]

sounds ok through my headphones andy

Oooo.... good idea

 

[pork]

Sounds like amplified thunder!!

 

[solarice]

I know the pipes are uneven on mine and there's a noticeable noise difference...dunno if its anywhere near what you're trying to achieve mind. Not that i know the difference in length and i'm pretty sure i don't even have any audio either.

 

[solarice]

In fact having viewed the vids im pretty sure its nowhere near what you're looking for lol.

 

[1275]

In fact having viewed the vids im pretty sure its nowhere near what you're looking for lol.

ooh I'm not so sure, there's an off-beat note there.

 

[Noddie]

progress report

very interesting definitely a bit of V8 in there !

 

[frank]

very interesting definitely a bit of V8 in there !

weird aint it ed i,ve been listening to various radials on youtube, to try and pinpoint the sound
neighbor friendly enclosed wastegate this time

 

[Noddie]

weird aint it ed i,ve been listening to various radials on youtube, to try and pinpoint the sound
neighbor friendly enclosed wastegate this time

Very posh!

 

[mrcheese]

Mmm lumpy.

A bit off topic but have you made or tested any 4-1 n/a manifolds, nowt came up in a search, ive got a honda one I was thinkin of reflanging.

Andy

 

[frank]

Mmm lumpy.

A bit off topic but have you made or tested any 4-1 n/a manifolds, nowt came up in a search, ive got a honda one I was thinkin of reflanging.

Andy

i,ve not tried andy, the flange tends to be the stumbling block

 

[frank]

oil feeds and w/g actuator fitted, and here,s how it sounds with this silencer tacked on

 

[karlj]

Sounds like diesel Frank

 

[skymera]

Sounds like diesel Frank

A diesel scoob?

I can't listen at work

 

[skymera]

Sounds like diesel Frank

A diesel scoob?

I can't listen at work

 

[frank]

Sounds like diesel Frank

thats just the bellhousing rattling against the engine karl (2 fingertight bolts only) here,s another with a bit less rattle

 

[frank]

110% happy with the end result if a little quiet, i,ll post an onroad vid when the tailpipe changes are done

 

[frank]

we,ve removed the tail silencer and fitted a straight alloy pipe, but its still pretty quiet !

 

[Stani1029]

Sounds bloody awesome!

 

[McMicra]

I want one, how much


Sounds amazing!

 

[McMicra]

Cant stop replaying it :L

 

[JoeK11]

Production run? Frankspeed burble special edition?

 

[frank]

Production run? Frankspeed burble special edition?

i will probably try a shorter/fatter dwell-pipe ( same volume) on an N/A one joe

 

[JoeK11]

I look forward to hearing it

 

[karlj]

Can't wait to hear it in the metal, sounds awesome

 

[h701micra]

Joe kindly showed me this video
Congrats Frank
Job well done. I was skeptical but had faith in Dr Frank

 

[blanes]

Frank, that is bloody genius.