400 HP Engine Build - Input Needed
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,095
Likes: 4,705
From: Henderson, NV
If someody spots me the money for a 5-axis CNC, tooling and raw material, I will mill some some heads out of billet. We shall convert to common rail injection and add two valves per cylinder while we are at it. Maybe reverse the flow and put exhaust ports in the valley?
Super Moderator
Joined: Dec 2011
Posts: 13,283
Likes: 6,046
For comparison's sake:
Ford LN-700/7000 (1984 equivalent to today's F-750)
60,000 GCWR
27,500 GVWR
Engine options:
8.2L Detroit Diesel 145 HP
10.4L Caterpillar 3208 165 HP
The foregoing helps me put the 7.3L with 235 HP and only a 9,500 to 19,500 GVWR into some perspective.
Ford LN-700/7000 (1984 equivalent to today's F-750)
60,000 GCWR
27,500 GVWR
Engine options:
8.2L Detroit Diesel 145 HP
10.4L Caterpillar 3208 165 HP
The foregoing helps me put the 7.3L with 235 HP and only a 9,500 to 19,500 GVWR into some perspective.
Thread Starter
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Laughing Gas
Joined: Mar 2021
Posts: 1,118
Likes: 425
Plus I'll be using an EGT gauge.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
If someody spots me the money for a 5-axis CNC, tooling and raw material, I will mill some some heads out of billet. We shall convert to common rail injection and add two valves per cylinder while we are at it. Maybe reverse the flow and put exhaust ports in the valley?
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
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Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
I'd guess core heads.
- KDD's award winning cylinder heads- 100% new USA made valves and springs go into every single head, after being pressure tested, heads are CNC machined/resurfaced on our RMC V30 CNC machine, new valve guides and seats, upgraded stainless steel injector cups come standard. Our proprietary multi-angle valve seat profile is machined on our Serdi 100 seat and guide machine - the industry standard for cylinder head machining.
- KDD performs all machine work in house on state of the art equipment. These heads receive all new hardened press in valve seats (on the stage 2 and 3) and iron matrix valve guides, as well as all new USA made valves and springs. We also install Stainless Steel injector cups.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
Thread Starter
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Laughing Gas
Joined: Mar 2021
Posts: 1,118
Likes: 425
Reading this made me dig up this graph from @Peixinho I've saved away
The green line is pretty similar in many respects to this build in terms of injector size and turbo. Peak torque exceeds 1000ft-lb and does so at ~2060 RPM. I think billet rods are probably a cheap insurance given this high torque at low RPM situation, especially if I want this build to endure for like 5-10 years. Anyone have input on this?
CNCFAB
Joined: Apr 2020
Posts: 4,874
Likes: 2,006
There is nothing cheap about billet rods.
Nor are they easy to get ahold of right now.
They would be WAY overkill for your build. Unless you plan to always tow heavy in an all out tune like that that graph shows.
Nor are they easy to get ahold of right now.
They would be WAY overkill for your build. Unless you plan to always tow heavy in an all out tune like that that graph shows.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
I had almost scheduled a dyno before my front cover "accident"..
Should be around 450hp/1000ft lb.
+500k engine has loosened nicely to handle the power?
(heard this from very reputable tranny builder in Finland,not making it up!
)
Should be around 450hp/1000ft lb.
+500k engine has loosened nicely to handle the power?
(heard this from very reputable tranny builder in Finland,not making it up!
)
