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 Post subject: 408C, 208cc CHI 3V Heads
PostPosted: Mon Oct 29, 2012 10:22 am 
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Nice results from a "mild" 408C. And by mild, I mean pump gas, nothing wild with the cam, etc.

This engine was built for Brian Gilchrist of Wichita. It will be featured in next month's issue of "Modified Mustangs & Fords".

*351C block, align honed with ARP main studs, square decked, bored & honed with torque plates
*Scat 4340 forged crank
*Scat 4340 H-beam rods
*Mahle pistons/rings
*Comp Cams custom solid roller cam, 248/254 @ .050", .650/.660", 110 LSA, 108 ICL
*Comp Cams solid roller lifters
*Comp Cams valve springs, tool steel retainers, spring cups, locks, Viton valve seals, stud girdle
*MSD Pro Billet distributor
*CHI 208cc 3V heads, CHI 3V 4150 intake
*QFT Q-850 carb
*Edelbrock aluminum water pump
*Ford Racing valve covers

This engine made an easy 574hp @ 6600 on the dyno. It carried that 574hp all the way to 6800.

Image

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PostPosted: Mon Oct 29, 2012 12:04 pm 
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Joined: Mon Oct 29, 2012 9:44 am
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Location: Shasta Lake, Cal.
Brent,

Those are great numbers and the engine looks great.

Ron


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PostPosted: Wed Oct 31, 2012 1:27 pm 
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impressive numbers for a mild build !! ... roughly what does the CHI 208cc out of the box no porting but ready to run with valves and springs ect cost ?

that looks like it would make a nice little bracket/street warrior engine for my son


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PostPosted: Wed Oct 31, 2012 1:47 pm 
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They start at around $2600 for an assembled pair and go up from there. It's a good deal IMO.

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PostPosted: Thu Nov 01, 2012 6:44 am 
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Brent,
Do you like the 208cc better than the 225?
What is your experience with Solid rollers on the street?


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PostPosted: Thu Nov 01, 2012 7:06 am 
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It depends on what the application is. The 208 head will have better velocity and almost the same flow as far as low lift and mid lift numbers go. The 225 head, of course, will move more air at high lift (.600-.750").

I actually like solid rollers for street cars. However, you have to use the right lobes and the right lifters for them to last. The Comp Cams Xtreme Energy lobes are really nice for street cars. The lobe intensity isn't bad at all, so you can get away with moderate spring pressures (525-550 open).

For lifters, pressure fed oiling is a must.

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PostPosted: Thu Nov 01, 2012 7:11 am 
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So you haven't had experience with the lifters coming apart like a lot of BBC guys?


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PostPosted: Thu Nov 01, 2012 7:20 am 
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Knock on wood, no. But I don't run them for extended periods of time without inspection.

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PostPosted: Sat Nov 03, 2012 3:32 pm 
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Usual questions:
1. CR? (I guessed about 10.0 or so?)
2. Headers? 2" x 31" or so? Collectors?
3. open headers on dyno?


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PostPosted: Sat Nov 03, 2012 4:14 pm 
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Werb,

10.3:1 SCR. 1-7/8" headers, running through dyno mufflers (big industrial sized mufflers, not Dynomax, Magnaflow, etc.)

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