https://www.yellowbullet.com/threads.../post-73403853

Carry some of these thoughts over too a Ls...it's just a Air Pump

 

You talking about Nathan's setup ?

 

Correct.

 

Been a bit....
Collecting some parts and finding some time to get back to re-assembling it.
New cam is here, added a Aviaid external pump to handle the RPM this will run at. Taller valves, PAC 1228's, different rocker stands for the added stem height. NEW billet gas carb to run C12, E85 is bad nasty ****. The rust that was on the seats and exhaust valves was terrible bad for just 8 pulls on the engine dyno...

 

What pan / windage tray combo you going to use with the external pump? I have an Aviaid single stage on mine also.
Question, .100 difference in installed height between the left and right heads?
What venturi / bore carb you go with?

Nice pieces!

 

Big Hell Yeah....Helicoil..

I've also heard Horror stories of Corn fuel and water on the subject of the Rusty seats...

 

Just fog the engine after it runs and will sit for more than a few days problem solved takes 2 minutes.

 

Not my experience. I have seen many sets of heads come through for refresh that show similar.
'Just fog' after running - EASY - lol, easier said than done TO BE EFFECTIVE....what a PITA. I used VP X85 from a NEW sealed 5 gallon container when I ran this on ethanol.

There is a reason OE's use stainless steel for fuel system components along with durable seat/valve materials (aluminum-copper-bronze-silicon-manganese-chromium-vanadium alloys mixed in the powdered metal) for DRY fuels in production vehicles that need to live outside of warranty periods - and beyond.

Here are the heads (before freshening) after just 8 pulls from NEW and just two weeks sitting sealed up with exhaust port covers and a carb cap in my climate controlled shop after returning from the dyno.

Had 4 cylinders leaking out the exhaust valves ranging between 30%-55%. Have several videos of leak down test being ran. No secret as to why. Frankenstein wanted to see the heads back to verify concentricity so I paid up and had them check them out and touch off the seats (that was a packing! LOL). The valves are all new because of the increased stem lengths for the solid roller springs so that didn't matter, but paying to freshen a set of heads with 8 dynp pullls when I do this kind of work was hard to swallow.

I did check the valves here and they were round (concentric). Did not verify the seats myself before sending them because that would have required removing the rust. I never heard back from my contact at FED as to whether the seats were or weren't concentric - I assume they were, but will never know. They were brand new heads. I do believe it was the rust from the E85 causing the sealing issue.

 

Good Lard 😢 that's Horrible...on just 8 pulls, damn!

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Definitely the E. Ethanol is a hygroscopic material and attracts water and moisture. As stated, the OEM’s are combatting this by using blended valve seats and stainless blend valves. Heated metals such as valves and seats only magnify the corrosion process after shut down. I’m not a fan of Ethanol in any capacity because it’s harsh and the EPA has determined that it’s done absolutely ZERO for helping our atmosphere and air quality. Go back to a good race gas and don’t look back.

 

"Not my experience. I have seen many sets of heads come through for refresh that show similar.
'Just fog' after running - EASY - lol, easier said than done TO BE EFFECTIVE....what a PITA. I used VP X85 from a NEW sealed 5 gallon container when I ran this on ethanol."

I've been running E85 for 6 yrs. Raced in a class. I fog after every race. Never see what you see after disassembly. Was that motor in the pictures fogged before dis-assembly? Why is it not "EASY"?? Spray the fogging oil on a vacuum port or line while engine is running till smokes blue, shut off engine, done.....

 

Getting closer to having this back together.
I have the external oil pump mocked up and fitted into the right position to fit the chassis of the car. I modified an aluminum Moroso oil pan I've had for years laying around the shop to incorporate the needed siphon tube for the external oil pump.
I worked the CID manifold some more from the last time increasing the throat dimension in the runners to more match the FED 710 ports.
Modified the lifter for better oiling to the rockers/pushrods. Got the heads set up and re-assembled with the NEW solid roller springs.
Still need to break the short block down, plug an oil port and change out the cams, fit the NEW oil pan and re-assemble for good.
Shooting to be on the dyno right after Thanksgiving. Hoping for some improvement!

 

That intake work looks great! What fel pro gasket is that? My cid 5.0 intake came with gaskets but they are larger then the head ports so I can’t use them for port matching the intake. Looks like there needs to be a decent amount of work done on mine for the ports to match. It looks like I may even have to mill the intake flanges to get to roof of the port to line up with the head.

 

Same oil pan I used. But my pickup is positioned in the front of the sump, 16AN. Couldn't put the fitting on the side without header issues

 

Thanks, it was not complete in the pic on the table, still had a couple ports to shape and the finish cartridge rolling.
Felpro 1208-2 (.45") thick
They also make a .060" thick which is 1208-3

I did a LS3 headed 408 recently with AFR heads and a 4.0 CID - that manifold needed to be milled .080" on the intake flanges, same situation.

 

Mine has the room for a side feed

 

I guess not..

 

This engine was ran on gas after the E85.
1st dyno day = 6 pulls on E85
2nd (consecutive) dyno day = 2 pulls on C16

No 'fogging'. IMO, E85 is crap without using the right materials in the engine. Many production LS2 and LS3 heads have the right valve seats to tolerate E85. The base Frankenstein F710's do not as evident from my pictures, proceed with caution...Just my $.02.

 

Basically what I was told when I had the idea of corn. The entire system needs to made for usage: Fuel tank, lines, Valves, valve seats, injectors.

thought it was a bit to much just for a few hp. Water contamination check before purchasing from the pump also.

 

93 octane for life!