440 budget build

[Gobie]

i got a 72 440 low comp motor with 346 heads an want to wake it up a little I was asking for help on other heads to put on it without having to rebuild the lower any thoughts??

 

[1967coronet440]

i got a 72 440 low comp motor with 346 heads an want to wake it up a little I was asking for help on other heads to put on it without having to rebuild the lower any thoughts??

Trickflow 240

 

[65-440]

440 source stealth heads, he did say budget ! I'm running them on my 383, no issues at all.

 

[Jeff_383]

Hughes whiplash cam for low comp engines. And a timing set. Put it in and just go have fun. Then save money for a good rebuild&heads in the future.

 

[Gobie]

440 source stealth heads, he did say budget ! I'm running them on my 383, no issues at all.

How do you like source heads

 

[Gobie]

How do you like source heads

You notice a different with the whiplash cam??

 

[Matt DeCicco]

I have promaxx heads and they are great!

 

[Mike67]

Get the thinest head gasket you can and any after market head should be a significant improvement.
Do a search on IQ52 's " Low Compression" build...

 

[1967coronet440]

440 source stealth heads, he did say budget ! I'm running them on my 383, no issues at all.

Ya I guess tf aren't really budget heads huh

 

[65-440]

For me the decision came down to spend $600 to rework my iron heads or for an extra 400 I get better flowing, lighter aluminum heads with new springs and valves. I chose the latter ! I have no regrets so far, didn't run into any snags. I verified stem height, disassembled them, lapped all valves and gave a good cleaning.

 

[HT413]

another vote for 440 source heads. Then add an RPM intake and the cam of your choice...

 

[threewood]

How do you like source heads

I will comment on mine. They work well and were in nice shape out of the box. I took mine down to clean up the pockets a bit. No issues with valve seats in mine and installed heights were all pretty close although I swapped in new springs to match my cam and set height with them.

Moreso, they have blind exhaust bolt holes so no chance of a leak. Closed chambers so it will bump up your c.r. a bit too.

 

[Gobie]

Thanks for the info so if I go with a whiplash cam an source heads do I need to change out the springs? What about rockers use stock ones?

 

[65-440]

Go on their website, they will say how big a lift cam the springs can handle. The ones they came with worked for me, and yes the factory rockers and shafts work just fine.

 

[Gobie]

Thanks a lot for the info

 

[Gobie]

This is what source heads told me with the whiplash cam
You would need to upgrade springs retainers and keepers as well as valve
seals to match that cam.
Sound about right?

 

[dieseldazzle]

75cc Eddie e streets (1046)

 

[moper]

This is what source heads told me with the whiplash cam
You would need to upgrade springs retainers and keepers as well as valve
seals to match that cam.
Sound about right?

That sounds right. Hughes uses higher spring pressures, and the Source heads come with crappy springs, retainers, and locks. So if you put real springs on them you have to change the other parts too. Personally I'd use anyone but Hughes. Keep the cam under 220* at .050 and it will be fine.

 

[451Mopar]

The 440 source stealth heads are on sale $499/each, so pretty good price.
The castings I got were nice, but out-of-the box they flow closer to 260 cfm.
Did some port and bowl clean up and multi-angle valve job, and they flowed about 290cfm.
The valve springs are only good for a mild (under 230 duration @ 0.050", 0.510" max lift) flat tappet hydraulic cam.
I don't care for the whiplash cams, they are more about the "sound" than performance.
If you want the car to have a really rough idle, than the whiplash cam may be for you.
Your likely to get just as good performance and better idle with the SEH2226BL cam?

You can get the CNC ported stealth heads, but they are actually slightly more expensive than the Trick Flow heads.
These ported heads are likely overkill if you are going to just run a mild 0.500" or less camshaft, and the Trick Flow heads require offset rocker arms where the Stealth will work with stock rocker arms. I would not trust the stock pushrods to be the correct length with any of these heads/cam combinations, so measure pushrod length.

 

[65-440]

My vote is to change your cam choice