440 source Stealth Heads or Trick Flow 270

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Rmoore

Rmoore

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Building a 512 cubic inch 440. Any luck with the fully ported Stealth Heads ?? By the time I spend the money on Stealth Heads fully ported and correct springs there is no money savings vs the 270 head... What's the preferred head
 
Rmoore said:
Building a 512 cubic inch 440. Any luck with the fully ported Stealth Heads ?? By the time I spend the money on Stealth Heads fully ported and correct springs there is no money savings vs the 270 head... What's the preferred head
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I have never had either, but if it was me, I`d do the trickflows in a heartbeat! U may not need the 270`s tho >240 supposed to darn good! Ask Andy F.
 
I’d pick the trick flows... we have Cnc stealth heads on a 440 and they are a better than factory head for sure but I think the trickflows are a better platform to start with
 
famous bob said:
I have never had either, but if it was me, I`d do the trickflows in a heartbeat! U may not need the 270`s tho >240 supposed to darn good! Ask Andy F.
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Thank you Sir !! I was just thinking the 270 would run as good as the 240 head. 270 would give me some growing room. Please let me know if my thinking is defective !!
 
Rmoore said:
Thank you Sir !! I was just thinking the 270 would run as good as the 240 head. 270 would give me some growing room. Please let me know if my thinking is defective !!
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The 270`s are max wedge size from what I understand , 240`s are cnc standard port.
 
famous bob said:
The 270`s are max wedge size from what I understand , 240`s are cnc standard port.
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Yes Sir they are Max Wedge intake ports.. And I'm running the Mopar Performance tunnel ram. I actually seen where they dynoed a 470 cubic inch low block 400 base motor that made right at the same horse power as the ported Wilson single four barrel intake. I think the intake was a Indy intake. The tunnel ram didn't have the max wide ports. But performed very well. With in a few little numbers of the ported Wilson. That's why I was thinking of the 270 jead. Cam pro profile is LSA 112 .674 lift with a 1.6 rocker and a 296 duration with a 5500 JW converter.
 
I run performer RPM ported heads. They flow 345.

If you are looking for room to grow I'd be buying the 270's.
 
You do know the 270 has a raised port? If you use an Edelbrock Performer RPM for example, the posts won't line up, top to bottom. You need a Max Wedge port intake as well. I'm going to go with the 270's when I install my Indy Cross Ram.
 
The 240 Trick flow can support 700Hp plus, and won't be limited on intake choices. You'd be looking at much higher compression ratios, higher lift cam and possibly more cubic inches to take advantage of the 270 vs the 240. IMO
 
I talk with Trick Flow today. They did recommend the 270 heads for my puzzle.. 512 cubic inch. So that is what I'm gonna do I guess...
 
Rmoore said:
I talk with Trick Flow today. They did recommend the 270 heads for my puzzle.. 512 cubic inch. So that is what I'm gonna do I guess...
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Now wait for eBay to offer 10-15% off or find a Summit coupon for 10% off and be ready to jump. I just gave one away last week
 
With 512 cubic inches and a 4-1/4 inch crank, you are knocking on the back door of what used to be original B-1 head territory. In fact, modern cylinder head even has a street ported version of B1 originals for engines in the 496 to low 500 inch range. 270 TFS is an excellent head and would be my choice. What kind of block do you have to withstand all the power this build is going to make? The research I have done shows this is a build for a 400 (preferably cold weather) block with BCR caps and girdle as a minimum starting point with preference being a cross bolted main block...
 
Garrett Ellison said:
With 512 cubic inches and a 4-1/4 inch crank, you are knocking on the back door of what used to be original B-1 head territory. In fact, modern cylinder head even has a street ported version of B1 originals for engines in the 496 to low 500 inch range. 270 TFS is an excellent head and would be my choice. What kind of block do you have to withstand all the power this build is going to make? The research I have done shows this is a build for a 400 (preferably cold weather) block with BCR caps and girdle as a minimum starting point with preference being a cross bolted main block...
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Thank Sir ! Unfortunately all I have is a stk block 440 and and stk block 400. I was going to build the 440
 
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