thanks all nice solid motor
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Junior User
Joined: Mar 2005
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From: up north
thanks all nice solid motor
Well the dyno sayz 355 hp @ 4700
421 lbs torq @3200
here is the build 67 390 block, stock rods arp bolts 10 10 grind
high vol pump with oil mods(45lbs @ idle 68@4800)
preformer intake,750 holley vacume 2eds,stock dizzy with 27 max advance @2700rpm mech advance.10.5 to 1 comp
trw pistions.
crane 941 cam and springs.hooker headers
stock heads coae 1960 78cc mild porting
cj valves with hard seats.
37 max advance,on dyno
WOW nothing like watching the oil burn off the heads @ 5000 rpms
14 to 1 gas to air best
94% cyl fill
What a tork brute AH AH AH AH
Thanks for the help guys
421 lbs torq @3200
here is the build 67 390 block, stock rods arp bolts 10 10 grind
high vol pump with oil mods(45lbs @ idle 68@4800)
preformer intake,750 holley vacume 2eds,stock dizzy with 27 max advance @2700rpm mech advance.10.5 to 1 comp
trw pistions.
crane 941 cam and springs.hooker headers
stock heads coae 1960 78cc mild porting
cj valves with hard seats.
37 max advance,on dyno
WOW nothing like watching the oil burn off the heads @ 5000 rpms
14 to 1 gas to air best
94% cyl fill
What a tork brute AH AH AH AH
Thanks for the help guys
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Might pick up a little more HP by richening it up a bit. IIRC at WOT you want about 13:1.
I think the intake manifold is your restriction. I would have used a Performer RPM. I do think there's more in it with a better intake. That should be close to a 400hp motor.
Glad you like it though!
Oh and I'm curious, how did you come up with 10.5:1?
I think the intake manifold is your restriction. I would have used a Performer RPM. I do think there's more in it with a better intake. That should be close to a 400hp motor.
Glad you like it though!
Oh and I'm curious, how did you come up with 10.5:1?
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Junior User
Joined: Mar 2005
Posts: 96
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From: up north
ya been thinking about it all day. The hp is not quite what i thought i would get. but the torq is great and in a 60 t-bird we will not be flying around very fast. The torq will get me there faster than stock so lets hope the boys in blue leave me alone.
With a auto trans the shifting will be in the low 4500 range on the wood. and this motor should scare me just fine. thanks guys wouldent do it without your help.
With a auto trans the shifting will be in the low 4500 range on the wood. and this motor should scare me just fine. thanks guys wouldent do it without your help.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
I think there's a governor in that auto trans you can change for higher shifting. That and a Performer RPM.... Something to think about for down the road.
Oh, was that on an engine dyno, or rear wheel? I would suspect an engine dyno, but I have to ask.
Oh, was that on an engine dyno, or rear wheel? I would suspect an engine dyno, but I have to ask.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I'd have also gone with a high rise intake over a Performer. Your hp/torque is pretty close to stock figures for a GT390. The comp ratio is closer to 9 to 1 though with those heads, pistons and .040 thick gaskets.
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Junior User
Joined: Mar 2005
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From: up north
Oh, was that on an engine dyno, or rear wheel? I would suspect an engine dyno, but I have to ask.
engine and wow what fun!!!!
engine and wow what fun!!!!
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Originally Posted by mmuenchow
The hp is not quite what i thought i would get. but the torq is great and in a 60 t-bird we will not be flying around very fast.
I think with the Performer RPM intake, you'd lose some of the real low bottom-end torque. Guys?
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