Mainflow L/B stg3 manifold
Turbo Mini Forums

Fitted my new exhaust manifold today all was going good till it was time to fit the carb. I have the short 3 1/2 in inlet manifold, due to the middle exhaust pipe being longer the carb fowl's the exhaust

So this means you cant fit the new stg3 manifold with a 3in inlet (without moddin)

Ill be buying a 7in one and see if they can do me a deal, it'll fit my car as have bulkhead cut out. But if you have the bulkhead intact (3 1/2in inlet to fit inside std bulkhead) you might have some problem's.

Bugger!

I seriously doubt it!

I no Paul but that y-piece fixing worked a treat
Plus i think a longer inlet might have been the way to go anyway?

I think a longer inlet gives more power and shorter one more torque - correct me if I wrong

That is right

I seriously doubt it!

Nope Wrong Short inlets for HPat high Revs, Long inlets for Torque down low,
regards,
Paul.

No Paul you got it backwards

Edited by paul wiginton on 27th Feb, 2011.

I seriously doubt it!

Nope, read it again Dave!

I seriously doubt it!

Im sorry am I missing somthing,

Long inlet Maniflod = More Torque eirler on at the price of some top end IE.. Moving the power curve down the rev range.

Short Inlet = More HP higher up the rev range at the price of some torque.

Short Exhaust runners (to a Point) increce HP at a little expence of the Torque.

Long Exhaust runners creat more back pressure so more torque and a little less top end powe.

All this is heavely dependant on cam choise and engine setup but its the basic rule of Tumb.

Youre the only person Ive ever heard of to think that way Paul, not saying youre wrong but all Swifty's experience, Baldwins experience, my own experience and anyone else Ive ever spoken to about it find short inlet gives more torque with less power and a long inlet gives more power with less torque.
I think its an agree to disagree situation

Edited by paul wiginton on 27th Feb, 2011.

I seriously doubt it!

I don't like getting involved in this sort of arguement as I generaly end up upsetting somebody.

However, I will post this page from my book.



Shorter runners shift the torque peak up the rev range and vice versa.

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."

I think i might go for a 5" inlet. This might get a happy medium between hp and torque
Paul S is this book based on turbo units or is it for all engine?

It develops the theory of "Wave Action Methods" and the application to the design of engine manifolds for NA engines, then expands that with a large section on turbocharging.

It's an OEM type text book rather than a tuning manual.

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."

With Respect I will agree to Disagree,

From my point of view I have no hard evedence to back up what I am saying its simply my experence and understanding of the matter,

and It looks from this statment your in the same boat,

Next motor I bring to Dyno I will do as many back to back tests as I can afford and we will see what comes of it,

regards,
Paul.

Hold on, lots going on in my head atm with non-mini. Recalling my discussions with Swifty and Baldwin and double checking with Nick, I have my wires crossed with a whole different take on it but I did gain more power from the longer inlet

I seriously doubt it!