Building a 500/400 F.F.E. with Mega-Squirt

[Chryco Psycho]

that si why i always port match
 if you are going with headers there are bigger gaskets available & you can open the port up more as well

[airfueleddie]

Thanks for the advice Chryco. I flowed the 440source heads the other day. here's what numbers I found. .100 lift=80CFM  .200 Lift= 151 CFM  .300 Lift=211 CFM  .400 Lft=252 CFM .500 Lift=273 CFM .600 Lift=276 CFM  that at 28" pressure with a 4.220 adaptor plate on the SF Bench Pro. I could have picked up a few more CFM with a larger adaptor plate, but I worked with what I have at my disposal. I did contact the SuperFlow Engineers and requested an price list on their adaptors@ 739.00 for a 4.375 'sleeve' and another at 4.560 bore for the other Large Bore engine we have in our shop,(540 BBC) so hopefully we can get the correct bore size adaptor. I also used a 1" radius around the intake port. The Exhaust flowed .100=57 CFM  .200=113 CFM  .300=146 CFM  .400=168 CFM .500=182 CFM .600=191 CFM this was conducted without a fixed flow tube for the exhaust.

[airfueleddie]

Next up is some slight bowl mods and gasket match. Of course I'll test after each mod and post the results here. I'm not going to 'hog' out the heads. Mostly mods for velocity and efficiency, but I will enlarge the port volume slightly. BTW, I CC'd the intake and exhaust ports. And they mirrored the specifications sheet provided by 440 source. Intakes at approx. 212 CC's and exhausts at 78 CC's using a Burette. 

[airfueleddie]

I have a special 'project' going on and I WILL continue to develop this engine package. However, parts/posts will become far and few in between until my other project is completed. It's gonna be a wild ride before this is all over,,,,,Eddie

[airfueleddie]

Workin the ports

[airfueleddie]

After some minor port wrk and backcutting the valves, I measured up to 294 Intake and 194 exhaust at .600 with 28" and 4.220 bore adaptor. I think with a 4.375/4.500 adaptor it would break 300 CFM easily. I do know the backcut on the valves were the largest gain for time&money spent. (Dig the psychedelic clay man)

[airfueleddie]

I backcut both Intakes and exhaust valves on a Sioux Valve stem and face grinding machine. I 'sharpied' the seat angle and placed a white piece of paper under the wheel. It helped highlight the angle I wanted to radius. I cant see close up like I used to, this helped quite a bit. I didnt touch the seat angle at all and the flow bench showed no leakage. I will use a Goodsons vacum tester after all the work is done. Another thing. I ordered my Scott Brown custom hydraulic roller a few days ago. It will have around .600 lift, I'll post the complete specs when I get it here.

[airfueleddie]

Scott Brown 'Juice Stick'

[airfueleddie]

another

[airfueleddie]

Sorry, I forgot to post the specs which are as follows: .365 lobe lift X 1.6=.584 304 Intake duration,(252@.050), 316 Exhaust duration total, the cam is installed on a 108 centerline and is ground with a 112 LSA,(Lobe seperation Angle). It's a Hydraulic Roller and was 359.00 delivered CAM only. The lifters are around 600.00, I thought about the 440 source hyd. rollers at 299.00 but I hate to say this, I simply dont trust them even though they appear identical to the Comp and Crane retro-fit hyd. rollers, which are of course a couple of hundred bucks higher. That would be a costly mistake if they didnt possess the same quality so I think I'll save up for the Name brand Comp or Crane units. Anyone use the 'sources' hyd. rollers? Thanks,,,Eddie

[airfueleddie]

Well, I'm basically done with the Heads and  Victor 383 Intake Manifold. After my trip to Goldfield, Nev. this Sept. I am gonna order the rest of the parts from Scotty Brown and fire this Plant up!!

[airfueleddie]

I ordered Lunati Roller Lifters, Cam button, RollMaster Timing Set, Bronze I.S.  here is our new facility at school. As soon as I get set up and start assembling the valve train I'll post more pics.

[airfueleddie]

Checking the CL and TDC

[airfueleddie]

I checked the Centerline of the Crank/Cam. 108 installed,(Intake) with 4 degrees advanced,,perfect

[airfueleddie]

I had to TIG weld a thrust retention plate for the roller cam behind the stock sheetmetal timing cover then file the thrust bushing to get the required .008 clearance for the camshaft. There is a high dollar cover that allows shims to be used but I cant afford it.