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Old 09-18-2008, 09:48 AM   #1351
IllNastyImpreza
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Originally Posted by reddevil View Post
Yeah, replaced the MAF once again....

And come friday, I will be attempting the highest boost possible on a combination of E85, 800cc injectors and my modified MAF.....

I am thinking 400 whp again.... but that will be pushing it. It will be done on a DynoDynamics(?) @ PRE in Gresham Oregon.
if your "GT30" is really comparable you should have no problem with 400whp
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Old 09-18-2008, 11:57 AM   #1352
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Yeah, but remember I only have 800 cc combined with the E85, which requires you to run 30% more fuel....
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Old 09-18-2008, 09:08 PM   #1353
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you thought of meth injection and pump gass ? ... or even just race fuel for the dyno pull ?
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Old 09-19-2008, 08:20 PM   #1354
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Well I found out how much 800cc injectors and E85 makes***8230;.

Not much.

The motor made a max of 288 whp/330ish torque @ 21 psi and ran out of injector @ 6000 rpm.

Turning the boost down to 19 psi was 265 whp with a moderately safe tune. But the MAF was hitting 5 volts with the piggyback adding in voltage up top***8230;.

This was done @ PRE on a DynoDynamics dyno. Sorry, neglected to get a dyno sheet. The torqe and power curves were good up until 5000-5500 rpm when I would start to degrade a bit. I was having some missing issues (we were pretty sure it wasnt det), and this could have been old sparkplugs. The AFR line was pretty damn ugly. "Safe" but ugly. The Walbro 255 just wasnt able to pump enough down low 4000-5000 rpm, then the fuel pressure would ramp up some due to the boost level, then the MAF would run out.

Since it may be awhile before I find (if ever) 1200cc sidefeeds, I am switching back to gas, as I have made 100+ more hp with the same setup.

Ah well, I just wanted to see what the injectors and E85 was good for, and now I know.
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Old 09-19-2008, 08:34 PM   #1355
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1200CC injectors, scary. Crazy!

Glad to hear you're switching back to regular old E10.
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Old 09-20-2008, 12:19 PM   #1356
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1200CC injectors, scary. Crazy!

Glad to hear you're switching back to regular old E10.
good ol E10 heh heh. What ever happened to using Leaded gass...damn emission laws
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Old 09-20-2008, 01:16 PM   #1357
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good ol E10 heh heh. What ever happened to using Leaded gass...damn emission laws
I think it had somethign to do with lead being a carconigin...
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Old 09-20-2008, 07:07 PM   #1358
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I think it had somethign to do with lead being a carconigin...
a fair amount of airplanes still use leaded. spend some late nights at the airports perhaps?
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Old 09-20-2008, 08:10 PM   #1359
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Decided to attempt the dual walbro setup today....

And I found that my fuel pump filter sock was INCREDIBLY clogged. So I replaced it and my fuel filter.

Bound to make a difference. The flipping sock barely let light through. When I took it off, the gas stayed IN it.
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Old 09-20-2008, 08:35 PM   #1360
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Originally Posted by reddevil View Post
Decided to attempt the dual walbro setup today....

And I found that my fuel pump filter sock was INCREDIBLY clogged. So I replaced it and my fuel filter.

Bound to make a difference. The flipping sock barely let light through. When I took it off, the gas stayed IN it.
HOLY CRAP. That's crazy! Interesting, wonder how that happened...

Good idea replacing the filter too. Intersted to see if that makes a difference in your AFRs.
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Old 09-21-2008, 03:21 AM   #1361
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****TY night @ PIR. Although any night I make it home without breaking anything is a good night.

I had the weirdest miss/hesitation/lurch. Could "kinda" tune around it, but then it would come back. Only would happen once full boost was going, and only below 5500 rpm....

So I suspect the plugs. I have regapped them to .026 from .036....

Did get two 13.2 @ 106 runs with lurching @ mishifts...

As well as a bunch of 14.xx @ 101...
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Old 09-25-2008, 01:36 AM   #1362
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Pulled the plugs and regapped them to .028 from the stock .034.

And.....

No issues. Yeah!!!!! Stooopid me and stock plugs....

However, I also suspect the knock sensor as I have a very "iffy" connection. Need to make it 100%.

The next step is to weld in a 5th injector.
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Old 09-25-2008, 03:09 AM   #1363
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i was playing with a JDM wrx RA last week and it had the stock 5th injector in it. super cool car.

so instead of getting bigger injectors you're just going to run a 5th? same size as the ones you are running now or a different size?
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Old 10-18-2008, 04:02 AM   #1364
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Yeah baby!

Popped the wall @ about 8:30 tonight. First thought I just cracked a ringland as usual. Then outside PIR I pulled over and realized it was STEAM coming out EVERYWHERE, not burning oil...

Thought I had finally popped a headgasket for the first time in my career, so I attempted to drive home. Nope. Made it a few miles and then the TEMP started to climb. So I made it to a bar I helped build the other day and pulled in there. A beer later, I took water out to the wagon and filled it back up, thinking I would be able to limp it home.

NO. I turned the motor over and water squirted about 2 feet out of the radiator! I realized at that point I had suffered a MASSIVE head gasket failure, or split cylinder, that water was just filling a cylinder and being pumped out when I turned the motor over!

So I called my favorite $80 per tow @ night guy and towed it back to the shop. two hours later I see what you see, one Hell of a split cylinder.

My suppositions on what happened?

Big boost, with issues. This motor NEVER felt right up top. It would get up and go, then fall flat. But EVERYTHING minus the header (which is better flowing now), and the bottom end, are the same as the POS crazy motor I ran 40whp with... So who flipping knows.

Next motor? Either a stroked 2.0, or an STI block.
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Old 10-18-2008, 11:15 AM   #1365
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holy crap that is one heck of a crack.
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Old 10-18-2008, 12:31 PM   #1366
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This is one of my favorite threads of all time - some of the most entertaining backyard engineering I've ever stumbled across.

Reddevil, maybe you've run headlong into the limits of your EM? Are you still shooting for 400 whp off the piggyback, or is it time to upgrade?
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Old 10-18-2008, 01:46 PM   #1367
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JB weld, and try again?
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Old 10-18-2008, 02:09 PM   #1368
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where you even possibly running lean at ALL when this happened ?? or is it just pure component strees failure ?
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Old 10-18-2008, 02:35 PM   #1369
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Yeah completely possibble. But I forgot to mention, I was running 50% C16 and 50% premium,

And like I said, this engine just never felt "right". Low boost, medium boost, high boost, it would feel like it would fall flat up top.
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Old 10-18-2008, 05:08 PM   #1370
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Quote:
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pics pics pics pics PICS!!!!
pics pics pics pics what more you want to see him taking a piss next to the car theres plenty of what he's done so far ..nice build so far bro I'm going with the swap cancelled my AVO kit kit instal I got a deal on a wrx with tranny and ecu and harness for 4300 plus send them my 2.5i harness the'y splice everything in for 900 bucks and all I'll have to do is plug it in and run the car no questions asked..simple as that....but like the diferent route your taking it.
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Old 10-19-2008, 02:10 AM   #1371
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pics pics pics pics what more you want to see him taking a piss next to the car theres plenty of what he's done so far ..nice build so far bro I'm going with the swap cancelled my AVO kit kit instal I got a deal on a wrx with tranny and ecu and harness for 4300 plus send them my 2.5i harness the'y splice everything in for 900 bucks and all I'll have to do is plug it in and run the car no questions asked..simple as that....but like the diferent route your taking it.
wat?
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Old 10-19-2008, 03:19 AM   #1372
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Thank goodness for this "blog". I forgot that I had actually some decent 12.xx runs @ 112 mph on this motor. So something MUST have been bad/off/damaged while running the last week or so.

I spent tonight tearing the motor completely down tonight to get the crank/rods/pistons out. Bearings were in great shape (except for #4, the bad cylinder, and even that would still be "passible" if the cylinder wasn't cracked.

However, had some serious issues getting the block torn down to say the least. NONE of the wrist pins wanted to leave home. Not one. I ended up splitting the block and cranking the crank around and unbolting the rods from the crank to separate the block. Then I had to drive the wrist pins out of the pistons with a pin and hammer. The rods spun perfect on the wrist pin. But damn the wrist pins were stuck in the pistons. There was a tiny ring of piston on each face of the wrist pin when driven out. As if the piston mushroomed outside the wristpin end, and when driven out, was forced through and out of this high spot.

The rings were in fine shape. The only piston damaged was the #4 piston which was the cylinder that failed. And the damage to that piston was that the bottom of the piston (the top of the cylinder was what cracked) was scuffed. Easy polish off.

However, and a possible BIG future issue, is that it appears to be NEW valve contact to the pistons. Did I jump timing a tad? Do the twin turbo heads not work with aftermarket pistons? What happened? Uhhhhg.

So I have to check the heads for bent valves and consider whether or not I can reuse the pistons in any motor using 2.0 heads.

And DAMN! it takes ALOT of boxes to contain all the parts of a motor in one place!
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Old 10-23-2008, 12:16 AM   #1373
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OK, the new motor plan.....

One of the STI blocks, the STI crank, and the H-beam rods and the JE pistons I was running (no damage to them, rings are "like new". There is a LITTLE scuff on the bottom of the #4 piston, opposite where the cylinder blew out.

The trick is the heads.....

I CANNOT (pretty sure) use the heads I was using with the JE pistons. Why? The heads I was using are early twin turbo heads. ie, 2.0 heads. I had used these heads VERY successfully on the ealier 2.5 motor, but I had been using either stock STI pistons, or the Mahles which are identical dish and valve cutout..... SO valve issues. However, on the JE pistons, when inspected, there was evidence of valves touching the pistons. Not horrible, but it was there, and that is BAD. So out go those heads as an option.

But then what heads to use?

Why the heads I had killed only 20 miles into break in a few months ago. The 1997 EJ20R heads. Which happen to be identical to 1997 USDM 2.5 heads, other than oil and water of course, and cam profile. But they have the same CC and so forth. And do no hit the damn pistons....

These heads are up @ Delta Camshaft being rebuilt....

So thats the basic plan...
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Old 10-23-2008, 01:02 AM   #1374
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wow, ive followed this thread alot, but is that an open deck motor that u cracked the sleeve in? I want to boost 7 psi on an open deck but not sure if it will hold if i have good internals. great job tho, love too read this thread.
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Old 10-23-2008, 01:10 AM   #1375
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a fair amount of airplanes still use leaded. spend some late nights at the airports perhaps?
At my local small field i can get 100 low lead but i dunno what that would do to my motor

Otherwise the best we get up here is 90
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