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Author Topic: 360 308 heads  (Read 6278 times)

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80 Lebaron Coupe

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Re: 360 308 heads
« Reply #15 on: April 18, 2014, 19:32:09 »

And have the 30 over pistons pressed to the 360 rods.
The block is already bored with new cam bearings.
« Last Edit: April 18, 2014, 20:32:53 by 80 Lebaron Coupe »
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80 Lebaron Coupe

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Re: 360 308 heads
« Reply #16 on: April 18, 2014, 20:37:45 »

Love it when a power plant comes starts to come together.
Me Tooooo :biggrin:
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Re: 360 308 heads
« Reply #17 on: April 30, 2014, 12:45:11 »

No Nothing special.
I talked to the machinest about 202 valves ect,
and he said if you dont have a substantial cam to go with it
your just wasting your money.
The 308s from what I have read are good breathing heads just like they are.
Back in the day I would have one or 2 bad valves replaced or shim the springs.
Now I just do it all with new parts and forget about it.
Yeah, unless your peak's going to be 5500 and you're really going to care about the extra 10 or so closer to it and not mind the slight tq loss, 2.02s aren't worthwhile.

Cool, what did those come on?
The TBI 360s were '89-'92 and had the 308s, open chamber swirl ports.

While the 318s got the swirl port small closed chamber heads back in '85, 360s didn't get swirl ports until getting TBI in '89- same with roller cams. 318s got the provisions for rollers in '85, 360s didn't until '89 when they got rollers with the TBI.
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80 Lebaron Coupe

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Re: 360 308 heads
« Reply #18 on: April 30, 2014, 14:43:26 »

Yeah, unless your peak's going to be 5500 and you're really going to care about the extra 10 or so closer to it and not mind the slight tq loss, 2.02s aren't worthwhile.
The TBI 360s were '89-'92 and had the 308s, open chamber swirl ports.

While the 318s got the swirl port small closed chamber heads back in '85, 360s didn't get swirl ports until getting TBI in '89- same with roller cams. 318s got the provisions for rollers in '85, 360s didn't until '89 when they got rollers with the TBI.
X2 Well Said. :thumb:
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80 Lebaron Coupe

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Re: 360 308 heads
« Reply #19 on: April 30, 2014, 14:50:32 »

Yeah, unless your peak's going to be 5500 and you're really going to care about the extra 10 or so closer to it and not mind the slight tq loss, 2.02s aren't worthwhile.
The TBI 360s were '89-'92 and had the 308s, open chamber swirl ports.

While the 318s got the swirl port small closed chamber heads back in '85, 360s didn't get swirl ports until getting TBI in '89- same with roller cams. 318s got the provisions for rollers in '85, 360s didn't until '89 when they got rollers with the TBI.

I know what you mean about the 85 318 Blocks with roller provisons,
I see the long lifter shafts and tap holes in the center valley for the roller lifter hold down shield,
but still had the flat tappet lifters.
 
My question is, Did they start the 302 heads in 85 or did they start that when the 318 went to FI in 88?
« Last Edit: April 30, 2014, 14:52:23 by 80 Lebaron Coupe »
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Re: 360 308 heads
« Reply #20 on: April 30, 2014, 15:12:18 »

I know what you mean about the 85 318 Blocks with roller provisons,
I see the long lifter shafts and tap holes in the center valley for the roller lifter hold down shield,
but still had the flat tappet lifters.
 
My question is, Did they start the 302 heads in 85 or did they start that when the 318 went to FI in 88?
I have a November or December '84 1985 long block with 302 heads and roller lifter provisions- was a truck block with flat tappet cam/lifters though. The 302 heads are connected with the roller lifter provisions, not the FI. The FI doesn't require a roller cam, but a roller cam does require 302 or 308 heads to use the factory roller lifter geometry.
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80 Lebaron Coupe

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Re: 360 308 heads
« Reply #21 on: April 30, 2014, 15:15:46 »

I have a November or December '84 1985 long block with 302 heads and roller lifter provisions- was a truck block with flat tappet cam/lifters though. The 302 heads are connected with the roller lifter provisions, not the FI. The FI doesn't require a roller cam, but a roller cam does require 302 or 308 heads to use the factory roller lifter geometry.
Got Cha, Thanks.
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Re: 360 308 heads
« Reply #22 on: May 01, 2014, 22:39:26 »

Come on man, put that thing together already!
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79dodge4ever

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Re: 360 308 heads
« Reply #23 on: May 05, 2014, 20:33:01 »

Never mind then, my brain just went straight to headers.  If you had headers on the car each one of those holes would be an exhaust leak.

truck headers are made to cover the air ports below the manifold ports
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Re: 360 308 heads
« Reply #24 on: May 06, 2014, 06:30:54 »

They had to go to a roller cam in, I think 84, definitely by 85, because the zinc levels in the oil got decreased dramatically to protect the cats.  They found that a high mileage engine that starts to eat a little oil throws that out the exhaust to the cat and poisons it.  The roller cam has less actual psi on the lobe and needs less zinc.
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Re: 360 308 heads
« Reply #25 on: May 06, 2014, 21:34:32 »



They had to go to a roller cam in, I think 84, definitely by 85, because the zinc levels in the oil got decreased dramatically to protect the cats.  They found that a high mileage engine that starts to eat a little oil throws that out the exhaust to the cat and poisons it.  The roller cam has less actual psi on the lobe and needs less zinc.
Technically the '85s, but they did make '85s in late '84. 318s got a slight bump in compression then as well with different pistons.

truck headers are made to cover the air ports below the manifold ports
Some are, but not all.
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