|
Re: Stock360 bottom end build
[Re: mechanic190]
#1713902
12/22/14 11:57 AM
12/22/14 11:57 AM
|
Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
|
master
Joined: Oct 2003
Posts: 7,506
Az
|
About .030" is all you can cut those heads before you start running in to manifold fit problems ( even then you might have to shave some off the intake to get the bolts to go in ). If your truck has a 9 1/4" diff in it I have a 3.90 gear set for it if you are interested.
Fastest 300
|
|
|
Re: Stock360 bottom end build
[Re: Crizila]
#1713903
12/22/14 12:26 PM
12/22/14 12:26 PM
|
Joined: Apr 2012
Posts: 119 Wyoming
mechanic190
OP
member
|
OP
member
Joined: Apr 2012
Posts: 119
Wyoming
|
Well I'll admit I haven't done all my research yet been too busy and haven't had a decent amount of time off. I'm planning on milling the heads and figured that went hand in hand with milling the intake down too. I have the mopar engines book and know there is a chart in there for how much to take off the intake for the amount taken from the heads. Haven't actually read it in about two years though. What's the max I can mill the heads and intake down and how do I figure compression ratio out at home? Not too worried about running pump gas not a requirement anyway. Other than milling heads and changing bottom end there is no other way to bump compression correct? How fast can I spin a stock bottom?
Last edited by mechanic190; 12/22/14 12:27 PM.
|
|
|
Re: Stock360 bottom end build
[Re: mechanic190]
#1713906
12/22/14 08:16 PM
12/22/14 08:16 PM
|
Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Ok so .060 off the face where would that put me at compression wise? Just curious on how much it'll bump it. Also planning on running shim head gaskets
6000 rpm is a realistic rpm on the soft side.. for the compression the big variable is the true CC of the heads... they did tend to be all over the place so you might want to measure what you have... if you can find some .024 head gaskets that will help you
|
|
|
Re: Stock360 bottom end build
[Re: mechanic190]
#1713908
12/22/14 08:46 PM
12/22/14 08:46 PM
|
Joined: Mar 2008
Posts: 883 Affton MO
qwkmopardan
super stock
|
super stock
Joined: Mar 2008
Posts: 883
Affton MO
|
Quote:
Ok so .060 off the face where would that put me at compression wise? Just curious on how much it'll bump it. Also planning on running shim head gaskets
Cutting .06 off heads will reduce comb. chamber by aprox 10cc. The comp. Ratio would go from 7.8/1 CR to 8.5/1 CR. Not worth the expense. Pistons .01 in the hole would get you 9.6/1 CR without carving on the heads.
|
|
|
Re: Stock360 bottom end build
[Re: mechanic190]
#1713909
12/22/14 09:04 PM
12/22/14 09:04 PM
|
Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
|
master
Joined: Oct 2003
Posts: 7,506
Az
|
You will be able to spin it an easy 6K. Assume they are open chamber heads, which will put them at 68 -72 cc"s. To reduce the combustion chamber volume by 1 cc. cut .0048 off the heads and for every 10cc's you mill the heads, remove .0063 off the intake gasket sides. If you don't want to CC the heads ( and you should ), go with 70 cc's.
Fastest 300
|
|
|
Re: Stock360 bottom end build
[Re: qwkmopardan]
#1713910
12/22/14 09:18 PM
12/22/14 09:18 PM
|
Joined: Mar 2006
Posts: 9,835 MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,835
MI, usa
|
Quote:
Quote:
Ok so .060 off the face where would that put me at compression wise? Just curious on how much it'll bump it. Also planning on running shim head gaskets
Cutting .06 off heads will reduce comb. chamber by aprox 10cc. The comp. Ratio would go from 7.8/1 CR to 8.5/1 CR. Not worth the expense. Pistons .01 in the hole would get you 9.6/1 CR without carving on the heads.
A very valid point. Either put pistons in it or run as is. Just make a correct cam choice to match the compression. Doug
|
|
|
|
|
|