project 31 8k 5 port
Turbo Mini Forums

Now that Roberts using this, everyone will be buying up giant turbos.

In the 13's at last!.. Just

Is the small turbo off a d4ft motor?

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

That's a GT1752 Paul.

What boost are you planning on running Robert?

In the 13's at last!.. Just

28psi i think ,bt it depends on how it all works gary .a voyag of discovery trying new things ...as usual ..

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

This excites me!

In the 13's at last!.. Just

EDIT: Shot too soon.

Edited by John on 16th Feb, 2012.

If something is worth doing, it's worth doing half of.

nonononono 28psi is not enough! 40psi FTW!

If something is worth doing, it's worth doing half of.

Just hook up an industrial compressor on the rear bench and run 11bar. Why not eh!?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Is that your moggy traveler Rob?

dedicated topic on your flrow bench please ?

I was wondering how to build one myself ...
My idea was to use my vacuum cleaner and measure vacuum as it is noticeably forcing to breath trough an inlet port on a 998 head even without the valve on !

Rusty by nature

flowbench build link

http://www.flowbenchtech.com/forum/viewtopic.php?f=8&t=519

Edited by robert on 8th Mar, 2012.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

There really is a forum for everything! Robert us non members can't see it, well i can't anyway.

damn , i didnt realise that .

pics in a new thread then ..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=468318

Edited by robert on 9th Mar, 2012.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

stock meastro head with 33mm inlet ,gives me a baseline and my first test on the new flowbench :).



inlet valve is green , exhaust blue ,and the wonky wiggly blue line is the percentage the ex is of inlet .

Edited by robert on 20th May, 2012.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Nice going Robert. I really must get my bench finished. :)

WWW.TURBO-MINI.COM

Excellent, thank you for sharing.

Pedro Silva

http://miniciados.blogspot.pt/

Great stuff.

Do you have a target performance that you are heading for? or will you just do a good job and use the flow bench to check they are all the same.

I've found that actual flow figures for modified 1275 heads are actually a little scarce when you start looking. You think that the yellow bible is full of them until you look in detail.

What depression are you using?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

28" paul ,um , if i can exceed the 124 cfm figure i would be fairly happy ,but i think i will just experiment and see where i end up ,velocity is important .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

I'll have to get you to chuck my head on there at some point,

also if your interested I can probably borrow std 8 & 16v k bimmer heads if you want to see how your figs stack up against others.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

finally managed to get around to testing my old mk1 spud head done in '98...35.7mm. inlet 29mm ex ported for economy and torque ,rather than top end high rpm .

here it is overlayed on the meastro head ...

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Thst's interesting. The port becomes the restriction, rather than the valve at over 8mm of lift.

So before, 1,5 rockers would probably be of use, but now they'd make no differance (lots of assumptions in this statement).

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

1,5 rockers would still allow for faster opening even if the cam lobe is made so that the valve does not go higher than 8mm.

But usually we lift the valves a quarter of its diameter to get a surface identical to the throat so 8mm would mean 32 mm valve which it is not (or maybe we need to take into account the stem ?)
(more assumptions)

Rusty by nature

I'm battling my way through Blairs Four stroke engine book ( 817 pages.. a way too may formulas for light reading but boy it is thorough) and now I'm ever more convinced that it is all a huuuuge can of worms :).

if you put in 1.5 ratio rockers you will get several things

1: faster acceleration/decceleration of the seat
2: longer seat duration (well depending on what check height you define this, as it should not really but in reality it will)
3: Higher lift.
4: Increased lift on overlap

While the extra lift will not do much if you lift beyond where it will flow more, it will open the valve quicker and thus increase lower lift flow. i sort if makes the cam be the next sportier version up.. it could work but does not allways. you have to take into account a lot of variables.. if you have a cam that allready very fast in acceleration you could push the valve train a bit beyond that it likes and cause all kinds of neat valve motion issues especially if you have stupidly heavy springs. as the pushrods can start to do a polevaulters impression.


The valve area is sort of equal to the port area at about 0.25xID lift.

The amount of lift is routinely a quite a bit more that 0.25 of the ID (0.35 to 0.4) reason is that the effective area through the valve seat is is reduced by fluid mechanic flow losses, colloqiually refered to discharge coeffecient (well not by me, but by Prof Blair .. that will be chapter 3 and i have so far reached the start of chapter 2..


once I get my valve lift thingy figured out and i found some new 35,7 valves (wtf did i put them..) i will do a proper test.

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/