Just Blew My Engine :(

[phantom xr6t]

a safe power level for a BA Block is don't go over 300kw or they are a ticking time bomb.

[xr6turboman]

I really want to lol got back a week ago and am already sick of the power level haha

[discostig]

You should see Tocchi's BA block in his drag Capri It's like 450rwkw or so. How long it lasts...no one can say!

[riptide]

I'm getting a bit of a miss on boost so taking it fairly easy until I sort it. I think that may have been what killed my last engine because it did the same thing. I'm wondering if it's a fuel pump issue (intank walbro) getting some air bubbles in the line or losing pressure or maybe a couple of injectors playing up. It seemed to be more noticeable in the morning when it was cooler on the old motor.

When I stripped the dead engine to have a look I noticed #1 and #5, which broke the rods, looked lighter in colour around the valve area under the head and #5 had aluminium spatter stuck to it.

Any help would be much appreciated

[xr6turboman]

Wouldn't be coils would it??? I had alot of trouble with coils at first to ....but also had a couple of walbros die on me to ended upgrading to a freaken herrod one was like 600 .... Went to tuner yesterday to talk about next round of mods to go to around 450 said a forged engine was 8k ish but he was also wanting to do a cam upgrade...never heard ofthat before

[riptide]

Would coils cause detonation? and the lighter colour in the combustion chamber?

I would be cautious about doing cams too because I've read a lot of stuff in the forums here and don't recall coming across that either.

I would have thought a good intake, exhaust, intercooler, pump, injectors, valve springs and fuel supply with your built engine would be the go. A bigger turbo might also help and I read about dropping the compression ratio to allow increased boost. Not sure what level that might be required though.

Maybe do the cam on a NA motor but not a turbo?

I will happily be corrected if I'm wrong, I'm just repeating stuff I read

[Wenier]

If your coils are failing then you wont get your spark under load properly. How old in km are the coils. As for the cams I also have read on the forum that no-one generally does the cams to get to 450kw. What has been stated above is a pretty good go.

[riptide]

I have made a surge tank and will be installing it next week. Should be pretty easy now that the hard part is done. If that doesn't fix the engine miss I will have to test my coils and plugs and maybe test the injectors on my mates flow machine.

[xr6turboman]

Looks good.. are you sure 1lt surge tank is big enough?? I always throught you had to go 2 or 3 lt..

[Ralph Wiggum]

+1, 1 litre is borderline. I personally wouldnt go any lower than 1.5ltr. 044's flow 305 litres and hour @ 3 bar. Do the maths on how long that takes too empty a 1 litre tanks (aprox 12 seconds) That doesnt leave a great safety margin if your intake pump was to fail.

Also, you have the return from the rail under the supply too the surge tank and return from the surge tank. This is going to give you a great deal of swirl in the tank, your also returning the hottest fuel closed to the pump inlet

I'd suggest instead of

Main Tank return

Main Tank supply

Fuel Rail return

run it-->

Fuel Rail return

Main Tank Return

Main Tanks supply

Attached is a pic of my tank before it went it. Top is fuel reg and return from reg followed by return too main tank and under that is supply from main tank.