Yes, yes it would!

Could you get right on that for us?

Eddys and Stealths are the same head internally as the same CNC program is used on both, correct? It would be interesting to see CNC Stealth/Eddy vs. TF 240 as the flow numbers I've seen look very similar. Granted, flow is never the whole story..

Agreed that would be awesome, Dwayne...ahem

Are Indy EZs not even in this conversation?

Another vote for trick flow 240 for your combo.
Hoping to hit the 9's when air turns better so far best 10.04 with mine

If I did the test(which isn’t likely), the stealths and rpms would only get mildly ported.
The cnc stealths cost the same as the TF 240’s, so for that price which head to buy is a no brainer(to me).
To buy some rpms and have them cnc’d, it’s even more expensive than the TF heads..... so again, a no brainer.

Power wise, I think a prepped EZ would be in the hunt, but they would be even more expensive.

For me the question I’d be looking to have answered is...... for “x” amount of additional dollars spent over the cost of ootb Stealths or RPM’s, or even when updating the heads with some mild porting, vs the ootb TF240’s..... how much extra power do you get for your $$?

I’d have it where all the heads had the same chamber volume to eliminate that variable, and build the long block with the intention of making 600-625hp with the mildly reworked RPM heads, then see how the other heads compare at that power level.

Both sets of those heads had 84.0 CC so no other changes on that swap, it had 9.25 to 1 compression ratio
The next change I did was to swap the crankshaft from the 4.250 stroke to 4.300 stroke to raise the pistons up so I got 10.3 to 1 compression the next winter Every time I swapped parts on that motor the car got quicker and faster, lots of fun

Exactly the info I would love to see. I'll wait for your results before firing up the credit card!

It's fun making changes and seeing the improvements at the track!

If you’re going to wait for those results to come from me, your credit card is plenty safe.

I haven't done a back to back test with Stealth or RPM heads vs. the Trick Flow heads but I've built a few engines with each. The Trick Flow heads make more power that OOTB Edelbrock heads that is for sure. I'd say around 50 hp more with a street cam and up to 100 hp more with a race cam. Which makes sense when you look at the flow charts and use the old 2 hp per cfm rule.

My pump gas 470 makes 700 hp with the 240 heads. If I put OOTB Edelbrock heads on there I'm sure it would drop it down into the low 600 range. I've tested enough 600 hp Edelbrock engines to know about where they end up on the dyno.

For Tony's engine I'd predict about 50 hp increase with the TF heads with a modest performance cam. I like the Mopar .528 solid in an engine like that or something similar. Mild enough to drive on the street without beating you to death but has just enough area under the curve to pull hard to 6000 rpm and make 550 or 600 hp.

I would go mid level

Tex

yes that was a bummer
BUT
these heads were great for a number of years on 2 motors . They were the best bang for buck at the time . The TF now kills them , unless you want stock look

Tex

3 years, 4700 miles and zero issues with Stealths. Would probably purchase Trickflows today, though...

Flying under the radar is cool, though.

Thanks Andy. It seems like starting from scratch, the tf240's are the way to go, hands down. If you need rockers, pushrods and a head capable of 700+ hp. I'm sure it would not make great sense for me to shell out 3 grand to gain 50 hp. If my crane Gold rockers could work and then I sell the stealths, it makes a little more sense. And I'm not totally opposed to cam change for bigger gains.

The Crane golds will work on the TF heads but you will need a few longer head bolts, longer pushrods, and some longer rocker shaft hold down screws. Cam choice for a street car depends on driver preference. It all depends on how you like the cam you have now or if you can live with something a little bigger.

Assuming this is a heavy street car with a 3.55 gear and a wide ratio 4 speed, torque on the bottom half of each gear is going to be VERY important. That is the first thing that came to mind; which head will give you killer torque down low and still be respectable from say 5000 rpm on up. The second is, is that cam a good grind for bigger heads?

I am talking 5 years or so at 6-8000mls per year plus monthly bracket racing


Tex

I kept hearing you need special Harland sharps, its good to know that my golds can work. Pushrods and bolts are no biggie. Thanks Andy

What is the cars current performance, and where do you want it to be?
I think the 0.507"/0.510" lift cam is going to limit the heads flow.
I think if you clean-up the stealth ports and bowl area a bit and have a multi-angle valve job done it will help the port flow better in the lower lift areas below 0.500" lift, and should not cost too much if you can do some hand porting? I would gasket match the ports and intake manifold. Not sure what manifold your using? If the performance is ok, and just looking for a bit more, I don't see the value of spending thousands of dollars to change up the combination?

All very sound advice! It really makes no sense that I'm looking into new heads for a car I havnt even raced yet, and will most likely only race a handful of times. I guess I just like to have as much at my disposal as possible. That's where my judgement sometimes gets clouded!

Currently I have a torker 11 intake. That's going too! I like the cam because it has very nice street manners, and it actually makes pretty good power. It's not the first time I've put something together that only made sense to me

The Trick Flow heads need short rocker arms. The typical HS rocker arms are too long so they made shorter ones to fit the TF heads. But Crane rockers are short to start with so they fit.