I've seen a lot of crate 350s with dart heads on them making some nice HP numbers. Since I'm on a very tight budget not being able to afford some nice AFR 190s, I was wondering if Dart cast iron heads are much better than stock. If I can see a 40+ gain over stock I will be happy, since they are about 500 with valves and springs. They are Dart Iron Eagle 2.02/1.60 SBC heads and are not centerbolt.

 

Yes they will make much more power than stock.
They are available in different sized intake port volumes.
The trick is to select the right one for your purposes.
the 165 cc has small hi velocity ports which will have more power than stock and good throttle response at low rpms.
The 215cc heads is probabily the best for and ultimate street 350.
Lots of flow there. Good power with moderate to larger cams and induction systems. The 180 and 200cc heads sort of fall in between. The larger 220+port volume heads are best on larger 400+ ci combinations. They would have lazy port
velocity at lower rpms and not get going until very high rpm
on a 350.

www.dartheads.com

 

I think 215 cc would be great. My cams operating range is gonna be 2500-6000 rpm, so low end would be good, but not ideal. When I tune the prom would I need to take the heads into consideration too since I will be replacing them?

 

I've posted this before, but I'll do it again. There are better buys in cylinder heads than the Dart's. The Dart's are good heads, but the Pro Action Lightning iron heads flow much better OUT OF THE BOX than the Dart's. In fact, the Pro Action's flow within a few cfm of the AFR's.

Go to www.enginekits.com Then click on the Cylinder Head link. $675 complete, ready to go.

HTH

 

Will they bolt on to stock TPI manifold? and in the future, I plan on getting an LT1 intake, would it line up with that too. this is a big concern of mine for obvious reasons.

 

Do you have any flow #s? Seeing as they outflow dart then they would outflow the Sportsman IIs too... hmmm, I should be ordering my heads late this week.

 

GO HERE


Pick the intake runner size you want... ( 180, 200 etc ) and in the specs it list the as cast flow numbers.


HTH

 

One quick question, I see they don't come with steam holes, do I need them, or is it hard to do, I'm gettin them ported by a shop, so they could do that too I guess.

Oh, and I put the air flow #s into DD2000, WOW what a difference from Sportsman IIs and Darts.

 

IF were me, I wouldn't port 'em. You would need to have alot more serious bottom end to tax these heads as cast.

Steam holes? The only small block that needs steam holes is the 400 small block.



HTH

 

What about just porting them to smooth them out, not really enlarge? oh, and can you check my other post too?i'm not sure which flow #s i need to enter, one guy said something about them being at .7 for the ones listed.

 

I don't know what that guy is smokin.... the flow numbers are measured at .100 thru .700 lift and at 28" water.



As for port cleanup, depends on who's doing it and how much. Honestly, I'd sink that $ into something else......like a higher stall converter.


HTH

 

LT1 intake will not work with Dart heads (even after conversion)unless you weld up the intake some.

The coolant and EGR ports in the heads are too large for the intake to cover.

I haven't ran into a problem with any other intake.....yet.