Minaj
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Posts posted by Minaj
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What do the plugs look like? They will tell you straight away if it's lean or not.
And of course the engine builder is going to say that, he's probably up for $15k+ liability if it was his fault that it failed.
So where are you going with this? It sounds like what you need is an independent engineering report from someone that will determine the likeliest cause of failure.
If the whole thing is angling towards a civil action (court) then remember that it only has to be "on the balance of probabilities" so if the crap valves were probably the cause of failure then you're set.
Spark Plugs were fine, no signs of running lean.
Yes, couldn't agree with you more on that one.
I've got a few done, I don't want to disclose everything online for other reasons.
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Cheap valves...thats a good place to start
Mind you i hope the replaced valves in my heads werent "cheap"
Yeah that's the place where I would start too, but the person who overlooked the motor keeps on telling me high combustion chamber temps which resulted in burnt valves and seats. I find it so hard to believe to start off with, E85 is a much cooler fuel. Arghhh this whole situation is frustrating.
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It's just so weird, with E85 the combustion chamber will much cooler, so I find it so hard to believe it burnt due to the fact of high temps.
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Were the valves just terrible?
It depends on a bunch of factors... cams would play into it a little bit as well as the valves are only really cooling when they're seated, more duration on the cam = less cooling.
So what's the question.... do you have burnt valves WITH scored bore or just burnt valves?
Yup valves were cheap ones from STA. Burnt valves and seats, and bores are perfect and pistons.
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Isn't just odd if the valves fail before a piston ? Being Alloy if running lean it would have melted the piston or picked up on the side of the bore, which in my scenario I haven't. Don't think Glen Suckling is a potato tuner..
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How lean are we talking ? if it was running lean are we also going to be looking at piston to bore contact ?
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Just after some in depth information,
Just wondering what causes a burnt valves and burnt valve seats, as well as what are the consequences of high combustion temperatures. ?
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Yup, EGT really important especially when running E85. I've heard for Subaru you have to tune individual cylinders while monitoring each cylinders egt if you really want to make some good power. I'm getting some egt bungs for my new manifold once I've sorted my car out.
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I think US tuners are much more knowledgeable compared to our tuners we have here.
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Wow a shopping list lmao.
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11.7 at drag wars, will upload time slip when I get home.
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I swear a smaller ex housing would make it more fun and quicker car for similar top end esp on e85. So keen to see it break 400wkw tho
Yeah bro, I agree with you. I'm really into my top end power, I use to race other high powered cars with .82 and they just keep pulling top end. So i thought might as well go .89
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EJ207 at 17 psi on a GT3582R E85
Once all the miss firing issues are fixed it will be good to see what power it pushes on high boost, I'm hoping to run atleast 30 psi.
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Cylinder valves not sealing, happened to mine rough as idle and shakes heaps.
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Have my car finally tuned on E85 in two weeks time, just before Nats.
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Hi all,
It's almost coming to Nationals and my pockets are becoming pretty empty. Just wondering if there is anyone out there who is using 16X8 TE37 which I could borrow for one day at the drags at 4NROTA. I would happily pay a lending fee if required or swap wheels just for the day.
Cheers
Minhaaj
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Motor almost ready to drop in.
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I bought mine from scarles for $250, was a waste of mine it collapsed under boost.
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Even though this is a waste of time as it's never updated, thought I would put them up here for a little bit.
my sheet: 328kw @ 22psi and 353 kw at 25 psi. Dyno sheet below, both on one dyno, pretty happy with shape of the curve and how early it comes on considering its a gtx3071r.
Are you a 2.5L ? or stroker ?
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Could be faulty item ? maybe return it?
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Return the fuel pump, get a Walbro. I personally think there's something up with the PUMP.
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What causes burnt valve/valve seats and high combustion chamber temperature.
in Engine Related
Posted
I have also forgot to mention, some of the pistons also has showed signs of some of the valves kissing the piston. Engine builder reason was it was due to valves getting to hot which deformed. I was told there was 4mm clearance piston to valve clearance at TDC.
Could it be the case where the cheap valves have stretched ???