2.9 Promaxx Aftermarket Head Porting

[rusty ol ranger]

So let me see if i follow...

3.7pistons+2.9rods+4.0crank jammed in a 2.9L block =3.5L stroker?

Its that easy?

 

[bobbywalter]

Yes.

With a machine shop.

or good disciplined building ettiquette.

 

[8thTon]

Ok, but how is this better than building a 4.0?

 

[PetroleumJunkie412]

From what I've read, they didn't have the 4.0 over there.

Made due with what they had, and the cost of shipping a crank is far less than an entire engine.

Shipping is the sole reason I haven't brought a 24v cosworth in over here yet.







.........yet.

 

[rusty ol ranger]

Yes.

With a machine shop.

or good disciplined building ettiquette.

Hmmm.....

Ok, but how is this better than building a 4.0?

Because its a 2.9.

 

[PetroleumJunkie412]

So, as it turns out, it's also because the 3.5 stroker is much higher output than the 4.0...

RND Engineering - Ford V6 Cologne and Essex

This is a page from the RND Engineering website, which acts as a showcase for their work in development of the TVR Speed Six 6 cylinder engine fitted to the lates models of TVR sports cars made in Blackpool, England, UK

www.rndengineering.co.uk

We should have been building these things years ago....

 

[Uncle Gump]

PJ... your 4.0L crank is soaked in urine...

I told you that wasn't a nice thing to do.

 

[lil_Blue_Ford]

Well sheet... now my engine ideas are galloping all over the place...

 

[Stroker]

5.4 on 2.9 crank?

No on the 4.0 crank

 

[Stroker]

So let me see if i follow...

3.7pistons+2.9rods+4.0crank jammed in a 2.9L block =3.5L stroker?

Its that easy?

The 4.0 crank need a bit of work to fit. Diameter turned down approx 13mm. Then you have to work out if you are going to internally balance the engine which will require mollory metal slugs or externally balanced which requires counterweights fitted to the front pulley and flywheel.

 

[Stroker]

Ok, but how is this better than building a 4.0?

It's not. In the US with all the 4.0 engines around I don't know why you would want to build a 3.5.

 

[Snoranger]

It's not. In the US with all the 4.0 engines around I don't know why you would want to build a 3.5.

Because there are a few on here (NOT ME!) who believe the 2.9L is a better engine then the 4.0L?!?!? The fantasize that the 2.9l is the greatest engine ever made.

 

[alwaysFlOoReD]

Shhh....
You'll wake them up....

 

[Curious Hound]

It's not. In the US with all the 4.0 engines around I don't know why you would want to build a 3.5.

Oh no. You didn’t just say that. Did you?

 

[Uncle Gump]

It's not. In the US with all the 4.0 engines around I don't know why you would want to build a 3.5.

Oh boy...

So if you had a pile of 2.9L's and a pile of 4.0L's... which pile would you urinate on?