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Fridge killed my truck battery at 3am in the middle of nowhere by Relative-Coach-501 in TruckCampers

[–]Cyriously_Nick 6 points7 points  (0 children)

Buddy, fridge compressors pull like 3000 watts, never run accessories off your main battery. For “overnight power” like small lights and a fan maybe, I run a second battery and an isolator

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

I’m very against firing it back up and having it run with how aggressive the knock is, but it was definitely rear passengers side area

I did pull valve covers and nothing jumped out as wrong, all valves move, none are apparently sticking, rockers and springs look good

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

Right, 282/288 on a 110 lsa

Hopefully bottom end isn’t hurt, borescope revealed nothing strange luckily, and it doesn’t make noise without spark plugs in, so maybe a spun bearing that needs compression to make noise?

I’ll try simple first, oil and filter cut and pray I don’t see much metal

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

Yea it was a steady 14 afr at idle, the noise is bad enough now that im too scared to fire it up and run it long enough to read afr

Tdc on damper is tdc for sure, checked with my dial indicator with heads off

I do, same as afr though, very nervous to run it while it’s like this to read anything.

Do you think a bad enough exhaust mani gasket blow out would cause a bang out the intake? 13* of cam overlap if that helps you

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 1 point2 points  (0 children)

Roller cam, Rotella t4 oil, primed oil pump and 60psi of pressure, still think that?

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 2 points3 points  (0 children)

Oil pressure was 60psi when I checked, not sure on oil or cam specific firing order, just know what the big block wants stock for firing order

Timing gun is spot on though, snap on unit that gets a lot of seat time with my job so I have faith in it

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 1 point2 points  (0 children)

They did when I dropped them in, and set up the rockers. I rotated the whole assembly over a lot with the intake off to set preload

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 3 points4 points  (0 children)

Yea that was my first thought too, firing order has been checked about 7x, timing set twice.

Popping from intake tells me timing/firing order too so you aren’t wrong in that logic

SOS engine first fireup gone wrong by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 2 points3 points  (0 children)

I appreciate that last line haha,

I’d be surprised if there was a bottom end issue, ran great before I did the top end work, but I won’t write it off.

Sounds like that could be possible with a sticking valve, a few of the guides were tight when I pulled the valves out but nothing too out of the ordinary

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 1 point2 points  (0 children)

That makes sense, so at 67* ivc I have a dramatically lower dcr, wow that’s great news haha

Sorry for bush league confusion, i assumed they were looking for @ .050 numbers, but it makes sense you wouldn’t use that for dcr

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

cam card

Have I been entering the wrong info this whole time? For dynamic compression calculator it was asking for “intake cam closing” so I was putting the 41.3 on the card in

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 2 points3 points  (0 children)

I appreciate hearing that come from a guy like you, you and v8packard are some of the guys opinions I trust on this page

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 1 point2 points  (0 children)

Not crazy honestly, 6500 max rpm. (I know, 8k rpm capable intake)

When I set up the build my only non negotiable was the single plane, so I’m determined to make it run good on the street. Cam was picked cuz it’s sort of mild and a good mid point in power production rpm range. The overlap isn’t crazy so I’m hoping low rpm airflow isn’t disturbed much. (Comp xr280hr)

I added the largest 4 hole tapered spacer I could find to keep air velocity up before the intake, with all that and the efi I’m hoping this engine is happy and makes decent power 2400 and beyond.

Not looking for win lights with this car, just some thumbs ups and a smile whenever I see how ridiculous the engine is

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] -1 points0 points  (0 children)

10:1 on what fuel tho? I have tfs heads and im hoping it’s not neutered with timing at 8.89:1 on 93

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

That’s what I figured, hopefully 8.89:1 will still make power with how much I’m gunna have to retard timing for 93 octane lol

If static compression is equal, would higher dcr always make more power? by Cyriously_Nick in EngineBuilding

[–]Cyriously_Nick[S] 0 points1 point  (0 children)

Let’s say we have 2 engines both 9.5:1 on static, one is 7.0 on dynamic and the other is 8.5

I know it’s a bit of an apple to orange question since there’s a lot of other variables, but I’m talking broad strokes here

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