Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3068057
08/15/22 07:17 AM
08/15/22 07:17 AM
|
Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
|
Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
|
Just read about the aero of a Hyundai Ioniq 6 and the different tricks it uses to get the Cd down to 0.21 https://en.wikipedia.org/wiki/Hyundai_Ioniq_6I might be worth looking one over carefully for potential aero mods to a pickup. The replacement of “elephant ear’ outside mirrors with thin aero shape video cameras deserves some pondering
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3073618
09/02/22 04:13 PM
09/02/22 04:13 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
I always wonder what all those well scienced out aromatics mods would do to ICE cars? They really have to stretch their imagination to squeeze every last bit of range out of those but never really apply that tech to real cars and trucks.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3089917
10/28/22 01:53 PM
10/28/22 01:53 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
I stumbled across some really nice un-cracked magnum heads for this project so I will be porting them and milling them as much as possible... What do you guys think of sinking the valves in the magnum head a little so I can mill it more??? Would say .050 down hurt flow or anything? Seeing how the intake valve is the limiting factor for milling it more this would allow a little more milling to further reduce the chamber size and get some super size compression going in here. I could shim the springs or maybe run some LS chubby springs... what else am I missing with this idea?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: HotRodDave]
#3090112
10/29/22 06:32 AM
10/29/22 06:32 AM
|
Joined: Dec 2009
Posts: 20,640 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
|
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
|
I stumbled across some really nice un-cracked magnum heads for this project so I will be porting them and milling them as much as possible... What do you guys think of sinking the valves in the magnum head a little so I can mill it more??? Would say .050 down hurt flow or anything? Seeing how the intake valve is the limiting factor for milling it more this would allow a little more milling to further reduce the chamber size and get some super size compression going in here. I could shim the springs or maybe run some LS chubby springs... what else am I missing with this idea? I don't think I would sink the valve. I had small chamber W5 heads and they were the same with the valves very close to the deck. I had them shaved down to the seat so the intake valve actually set below the deck surface.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: Guitar Jones]
#3090201
10/29/22 01:58 PM
10/29/22 01:58 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
I stumbled across some really nice un-cracked magnum heads for this project so I will be porting them and milling them as much as possible... What do you guys think of sinking the valves in the magnum head a little so I can mill it more??? Would say .050 down hurt flow or anything? Seeing how the intake valve is the limiting factor for milling it more this would allow a little more milling to further reduce the chamber size and get some super size compression going in here. I could shim the springs or maybe run some LS chubby springs... what else am I missing with this idea? I don't think I would sink the valve. I had small chamber W5 heads and they were the same with the valves very close to the deck. I had them shaved down to the seat so the intake valve actually set below the deck surface. Thinking more on it this is probably what I will do then put a nick in the piston if I need it. Sinking the valves will in itself lower compression, going to be chasing very diminishing returns sinking valve and gaining a CC and then milling it to lower it 2 CC. I really wish I could find some drop in flat faced valves for these...
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3090238
10/29/22 03:49 PM
10/29/22 03:49 PM
|
Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
|
Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
|
sample quote Thermal Barrier Piston Coatings A Thermal Barrier Coating is a spray-on coating usually applied to the top surface of the piston. Its function is to reduce heat transfer into the top of the piston. The benefit of Thermal Barrier Coating is highly dependent on the application and its use. Thermal Barrier Coatings are more effective if other components of the engine such as the combustion chambers, valves, and exhaust system are also coated. Advantages: Thermal barrier coatings will reduce heat transfer from the combustion chamber to the piston crown. Disadvantages: There is some additional cost added to the price of the piston for adding a Thermal Barrier Coating. While the cost may be somewhat insignificant, there will be additional expenses in coating the other combustion components in order to yield the full benefits of Thermal Barrier Coating. Once the piston is coated, there cannot be any machining or modifications done to the piston crown. If any modifications are needed, the piston will need to be recoated. Mahle offers its Powerpak piston kits which come with the Grafal coated piston skirts and a phosphate coating. These two coatings are mostly utilized for street and racing applications and have been proven reliable for many years. They are applied during the production process, so it is very inexpensive and well worth the benefits when the cost equates to pennies on the dollar. The other coatings are beneficial but are structured mainly for more specialized applications where engines are under severe and extreme conditions. The benefits of piston coatings have been debated for many years, but if properly utilized in the right situations, they can be a great way to extend the internal part’s life expectancy and even the performance it delivers. If you think a particular coating might be better for your application or you are not sure which would yield the best results for your engine, give the folks at Mahle Motorsports a call and get the best recommendation from professionals. end quote https://www.chevyhardcore.com/tech-...s-when-you-should-and-shouldnt-use-them/
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3090239
10/29/22 03:51 PM
10/29/22 03:51 PM
|
Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
|
Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
|
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: 360view]
#3090248
10/29/22 04:24 PM
10/29/22 04:24 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
Coating the piston will not increase compression as it is already going to be as close as I dare to the head, with a film on it i will have to reduce piston to head distance the same amount. It would still have the thermal benifit but I would have to measure and make nachos in them before the coating, also if I get too close it will touch the head and possibly mess up the coating on the head and the piston...
Is there any good DIY kits that you know of?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: Ray S]
#3158000
07/08/23 11:23 AM
07/08/23 11:23 AM
|
Joined: Nov 2022
Posts: 209 Green Bay
Andyvh1959
enthusiast
|
enthusiast
Joined: Nov 2022
Posts: 209
Green Bay
|
This thread speaks directly to my desires for the engine I plan to use in my 56 Docge pickup daily driver. I'm mounting the 56 cab/box onto my 2001 2WD Dakota chassis, and ditching the 4.7/5-spd for a built 5.2 Magnum port EFI , as I like the idea of a classic Mopar engine in a vintage pickup. The drivetrain will be the 9.25" 3:55 ratio limited slip rear axle from my Dakota, overdrive trans of about .67 or .62 and stock tire diameter to get on highway revs at about 1800 at 75 mph. I know from many trips driving my 2001 Dakota if I can cruise at 60 mph in 5th gear (.72 ratio) it keeps the RPM just under 2000 and I have recorded fuel mileage over 21mpg. Based on that, with a built 5.2 EFI Magnum producing over 350 ft-lb of torque in the 1600 to 2000 rpm range, I feel its possible to achive consistent 20mpg at 75 mph, and still enjoy over 350 rwhp when I want to stomp on it.
Gene has a 318 in his vintage pickup on a Dakota chassis and said he's gotten 20mpg on occassion. Thanks to Gene's suggestions I ditched the plans for a 4.7HO and will go with the classic build plans for a 5.2 Magnum EFI, Keith Black flat top pistons, deck the block, 5.9 heads, block hugger headers/dual Magnaflo exhaust, Edlebrock Air Gap intake manifold, MSD ignition and whatever else I can plan to create a vintage daily driver that can produce good fuel mileage for highway cruising.
My 56 C3-B8 Dakota build
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: Andyvh1959]
#3158003
07/08/23 11:41 AM
07/08/23 11:41 AM
|
Joined: Mar 2010
Posts: 1,061 Atlanta, GA
mgoblue9798
super stock
|
super stock
Joined: Mar 2010
Posts: 1,061
Atlanta, GA
|
This thread speaks directly to my desires for the engine I plan to use in my 56 Docge pickup daily driver. I'm mounting the 56 cab/box onto my 2001 2WD Dakota chassis, and ditching the 4.7/5-spd for a built 5.2 Magnum port EFI , as I like the idea of a classic Mopar engine in a vintage pickup. The drivetrain will be the 9.25" 3:55 ratio limited slip rear axle from my Dakota, overdrive trans of about .67 or .62 and stock tire diameter to get on highway revs at about 1800 at 75 mph. I know from many trips driving my 2001 Dakota if I can cruise at 60 mph in 5th gear (.72 ratio) it keeps the RPM just under 2000 and I have recorded fuel mileage over 21mpg. Based on that, with a built 5.2 EFI Magnum producing over 350 ft-lb of torque in the 1600 to 2000 rpm range, I feel its possible to achive consistent 20mpg at 75 mph, and still enjoy over 350 rwhp when I want to stomp on it.
Gene has a 318 in his vintage pickup on a Dakota chassis and said he's gotten 20mpg on occassion. Thanks to Gene's suggestions I ditched the plans for a 4.7HO and will go with the classic build plans for a 5.2 Magnum EFI, Keith Black flat top pistons, deck the block, 5.9 heads, block hugger headers/dual Magnaflo exhaust, Edlebrock Air Gap intake manifold, MSD ignition and whatever else I can plan to create a vintage daily driver that can produce good fuel mileage for highway cruising. Couple points for consideration. 5.2 and 5.9 magnum heads are the same, no difference so use whatever good set you have or can find. If you are going to deck the block, you may not need to spend money for KB pistons as 5.2 pistons are closer to the deck than 5.9. If bores are good just deck the block to get the piston crown to zero deck or close. Magnum manifolds would be fine if they fit and there would be very little if any improvement with block hugger headers. A regular performer intake manifold with a thermoquad( or second choice quadrajet) will net you the best mileage if you are switching over to carb. Maybe be overkill, but if you are going all out on mileage an 8.25 rear would be worth a little over the 9.25. Tonneau cover and electric fan are also worth looking at.
|
|
|
Re: Super duper MPG 318 (part 2)
[Re: Andyvh1959]
#3158025
07/08/23 01:59 PM
07/08/23 01:59 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
I took the heads for this project to the machine shop yesterday to get a 3 angle valve job and milled and they said it would be over $500 or about double what I paid a year ago for a similar job on a customers heads and I had already hot tanked them and cleaned em up, I always used em because they were convenient their work was never great machine work anyhow so I brought em back home with me and am looking for a different machine shop.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
|
|