Just got back from the Dyno!

[67topless]

Man, that is a lot of fun; I can see how this could get addictive! Anyway, in preparation for this morning, I did the following (check out my signature for current setup):

• New lighter springs in the distributor... when I took the old ones out, I could hardly pull them apart they were so old

• New accelerator return spring (my old setup was rubbing on the intake manifold, it is silky smooth now)

• Bought new secondary springs, but did not install them (wanted to see what it looked like with the stock first)

• Verified that my timing was at 39 degrees total (this got adjusted down to 37 during the dyno)

• Changed the fuel filter and spliced the fuel line (I had a crimp in the hard line under the chasiss... you may have seen a posting I had asking questions on that topic)

Anyway, here is the graph with the four runs I had:

The first run was a baseline with no changes and used 4th gear. The second run wasn't much different than the first... and again used 4th gear.

The third run had the timing adjusted to 37 degrees and used 3rd gear. The fourth run we added the lightest spring possible for the secondaries so they would open sooner and again used 3rd gear.

As you can imagine, my best potential for power improvement would be to get rid of the 2.79:1 rear and my 4sp toploader. Maybe a T5z with 3.55:1 or something... but that is a discussion for another day (and covered a million times I am sure on this forum).

With all that said, wow! My adrenaline is still kickin...

 

[66ford289]

Thats awesome. Pretty flat looking torque curve. You have just inspired me to go work on the mustang today.

 

[67topless]

Just noticed the graph I posted had a baseline of MPH... I think the RPM's are a better baseline. Check this out:

 

[66ford289]

That helps alot, would you be willing to tell cam specs?

 

[67topless]

Xtreme Engergy hydraulic flat tappet camshaft (comp cams part #31-238-3)

RPM range 1300 - 5600
Duration in 262 - ex 270

Here is a link to all the specifications.

http://competitioncams.carshopinc.com/product_info.php/products_id/14356/31-238-3

Scott

 

[coolblue65]

I bet if you add a good set of aftermarket heads you will gain 50+ RWHP.

 

[66ford289]

I bet if you add a good set of aftermarket heads you will gain 50+ RWHP.

Speaking from experience?

 

[Stangboy67]

Quote:
Originally Posted by coolblue65
I bet if you add a good set of aftermarket heads you will gain 50+ RWHP.


Speaking from experience?

His (coolblue65) combination (289 w/ TF heads) would support that with his 275 RWHP. That would definately up the fun factor a notch!

 

[67topless]

I bet if you add a good set of aftermarket heads you will gain 50+ RWHP.

I bet you are right... the amount of money I spent getting those heads ported - polished and tapped for the roller rockers, I would have been well on my way to a set of nice heads.

 

[coolblue65]

Speaking from experience?

Yeah I am, when I first rebuilt my motor good heads weren't in the budget, so I had some minor work done on the stock ones. After 2 years, I was able to get the Trickflows, and they added just about 50 RWHP and about 40 RWTQ.....with a healthy loss of compression because of the TF's 61cc chambers.