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Upping Compression ratio -440 - Printable Version

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Upping Compression ratio -440 - Racer Brown - 03-20-13

Piper Wrote:Well I think I lucked out, we did the DIY cc'ing of the heads, and they came to a couple drips over 73cc for the chambers that were spot checked


should put me around a 8.5:1 with a .020 head gasket


at least it will favor the crappier gas!
Good job, Kev, I look back and I should have done that!

Upping Compression ratio -440 - Piper - 03-25-13

Question for the group, hardened seats are they only needed on the exhaust or both?

Upping Compression ratio -440 - ws27 - 03-25-13

Both. You're in there, might as well do both. Intake wear at roughly 1/2 the rate of exhaust.

Upping Compression ratio -440 - Piper - 03-25-13

the machinist quoted me $40 per seat...I don't know if that sounds right

Upping Compression ratio -440 - 67440Dodge - 03-25-13

yea.. it's about right. Last time I checked at getting it done on a set of 906's, it was $800 just to clean em and put hardened seats in. That didn't count any guide work needed...

Upping Compression ratio -440 - Piper - 03-25-13

He quoted 250 for the valve job which is good

the seats though...ouch!

Upping Compression ratio -440 - 67440Dodge - 03-25-13

Now you know why lot of people go stealth heads..

then.. there is this..

http://www.ebay.com/itm/Mopar-Chrysler-Dodge-Plymouth-383-440-Closed-Chamber-Cylinder-Heads-915s-/300879765146#vi-content

Upping Compression ratio -440 - 67r/t4speeder - 03-25-13

67440Dodge Wrote:Now you know why lot of people go stealth heads..

then.. there is this..

http://www.ebay.com/itm/Mopar-Chrysler-Dodge-Plymouth-383-440-Closed-Chamber-Cylinder-Heads-915s-/300879765146#vi-content

Hey that's not too far from me. If you didn't have a set to work with these would be a decent deal.

Upping Compression ratio -440 - 67r/t4speeder - 03-26-13

[Image: 487895_10151307032021722_881235735_n.jpg]I take it this guy owes you some cylinder head money?

Upping Compression ratio -440 - ws27 - 03-26-13

dRofl