Knock knock here comes a new block

turbo50 · Apr 15, 2016

After discovering a rod knock I'm stuck deciding if I wanna do a rod and piston build or a 5.2 build. What is everyone doing for their motor builds in the 800-1000whp range?

Killswitch16GT · Apr 15, 2016

what happened? How much power were you at?

bklynpanman · Apr 15, 2016

at the moment building a sleeved 5.0,

turbo50 · Apr 15, 2016

660 at 11lbs and 730 on 110

Killswitch16GT · Apr 15, 2016

ugh. I thought that level would be safe on stock bottom. This scares me

desant89 · Apr 15, 2016

yeah, I am not liking that either. What was the car running as far a fuel when it blew?

Do different types of fuel make anything more likely to happen even if making similar power to lower octane fuels?

turbo50 · Apr 15, 2016

I was in pump gas tune driving to work and when I pulled up to a car beside me I heard a tapping echo off his car and when I pulled into work that's when I noticed the knock. Not bummed because I know it was going to happen eventually. Oil pressure and temp was also normal and I was running amsoi full syn. With mmr opg

desant89 · Apr 15, 2016

Damn, that stinks. Sorry to hear that. I will be in the same boat i'm sure just waiting for something to happen. I am going into this expecting to do a build at some point so will be following what you end up doing. Good luck!

turbo50 · Apr 15, 2016

If I was to build a 5.2 with the flat plane crank. Will the factory ecu fire in that order or will I need a standalone

Gibbo205 · Apr 15, 2016

turbo50 said:
I was in pump gas tune driving to work and when I pulled up to a car beside me I heard a tapping echo off his car and when I pulled into work that's when I noticed the knock. Not bummed because I know it was going to happen eventually. Oil pressure and temp was also normal and I was running amsoi full syn. With mmr opg

What was your RPM limiter set at and how high/hard have your revved the car?

I ask because rod knock like you have is normally due to excessive RPM and not enough oil to lubricate the crank resulting in a rod bearing being stripped.

I think you are actually lucky and have not yet spun a rod bearing otherwise you'd be getting low oil pressure warning and even louder rod knock. In short you could simply get away with a set of new shells and bolts if no crank damage is evident and be good to go.

TwinTurboMustang.net · Apr 15, 2016

sorry to hear about your engine. Not sure what caused the failure, but at that amount of boost you should be very safe. I gues now you can build a bullet proof set up. Good luck.

turbo50 · Apr 15, 2016

GigaHz · Apr 15, 2016

Did you ever get the surging figured out?

Glenn G · Apr 15, 2016

You would need to rewire your injectors and coils to fire in the right order with the stock ecu, you will also need gt350 cams but i imagine you already know that.

Looks like you only need to rewire every other cylinder
1-5-4-8-3-7-2-6 GT350
1-5-4-8-6-3-7-2 Coyote

Crowderb · Apr 15, 2016

My heart sinks every time I see these post, what setup are you running. Am I driving a ticking time bomb

Knock knock here comes a new block

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