Twin turbo UZ ST185

[Toranamat69]

How come I never see any of the cars from this forum in Canberra driving around? There are plenty of good projects on the go/finished in canberra and I drive my red Torana Hatch around all the time and have been to a couple of shows but have only met 1 person from this forum. I would love to catchup with some blokes and see their projects in the flesh. If you see a red Torana hatch with 17" dragways on it, wave me down and say g'day.

[1UZ-MX83]

Originally Posted by Toranamat69

How come I never see any of the cars from this forum in Canberra driving around? There are plenty of good projects on the go/finished in canberra and I drive my red Torana Hatch around all the time and have been to a couple of shows but have only met 1 person from this forum. I would love to catchup with some blokes and see their projects in the flesh. If you see a red Torana hatch with 17" dragways on it, wave me down and say g'day.

Well, my Cressida for one "swans" around Canberra quite regularly. Mind you, it IS a Cressida and, apart from mags and lower ride height, doesn't exactly scream "look at me" (which is just the way we want it).

Next time you see a silver MX83 Cressida with mags, have a look at the front - it's the only one with a "V8 Quad Cam 32" badge on it. Oh, and it doesn't sound quite stock either...

[JustenGT8]

cheers guys. I figure if they are getting paid good coin for the work the least they can do is show me they have done besides, it was the engine builder for our National Rally champ who just happens to have won his 1st titles in my model Celica A bit of a perfectionist.

This i actually Ed's old engine with custom SPS pistons and the deck height is fairly extreme...i haven't measured it yet but pistons are very clearly proud of the block deck. HG selection and cam lift will be critical

[JustenGT8]

Built engine is on hold as can't fund the VVTi head rebuild and a new garage and roof my large rear deck...damn drought killed my money tree

So, i sourced a stocky to slot back in for fun times in the interim. Looks like it had swallowed some water though and a few valves were seized. freed them up but worried about the valve seat seal given the amount of rust?

I did a leak down test today on the suss engine....results were pretty good but i'm not convinced. The good cyls 1 & 3 came in around 95% with the suspect 5 & 7 92% and 95% respectively.

You could hear and feel the air leaking past the inlets in 3, 5 and 7 though so far from a great seal? I am quite surprised that the results came back so good actually but the % leak was consistent across a range of pressures. In fact, once up over 70psi the engine would turn over so had to keep one hand on the shifter to stop the crank turning. No1 had the best seal and would try and turn over from 50psi.

This is inconclusive for me and i'm still at a loss of whether to try and fire this engine up or start sourcing another?

Thoughts

[cribbj]

Justen, since slotting it in your car is a major PITA, why don't you try test running it on the engine stand? Not long enough for it to overheat or anything, but just to get the oil circulating, and perhaps work those valves a bit and get them freed up?

Additionally, if you've got a 1/2" drill motor, or a hefty air tool, you could roll the engine over that way, using the front dampner bolt. That would be a good exercise before you actually ran it.

I'd probably try to get some light oil down around the lifters to free up the valves before I ran it. Probably ought to do the same for the cylinder bores.

This ought to give you an idea whether it's going to be a keeper or an anchor....

[JustenGT8]

Hey John,,
The engine has been consuming a regular diet of light oil and WD40 for the last coupla weeks 4 inlet valves were seized from the rust on the stem but got them all freed up and engine spins nice. Makes good whooshing noises so there's at least some compression in all cyls.

Just a bit weird the leak down result is so high, but with what seems to be quite a decent leak past the valve seats?

Good idea on the air tool though, i'll give the thing a good spin.

[JustenGT8]

So here's the start of the new SC setup

[cribbj]

About time! (like I have room to talk )

OK, so what's up your sleeve with that top adapter assembly? The front port I get, and the rear port sorta looks like it's for the bypass, but do you think it's big enough? Jeez, you could nearly fall in!

Are you putting a W2A core in that adapter, or in the manifold?

Methinks maybe this will be another twincharge setup? That's the reason for the, ahem, whopper of a bypass port?

Put your thinking cap on and help us all come up with a good way of distributing the boost better on these forward discharge SC's. Our front cylinders really do run leaner & meaner than the rest.

[JustenGT8]

Originally Posted by cribbj

About time! (like I have room to talk )

OK, so what's up your sleeve with that top adapter assembly? The front port I get, and the rear port sorta looks like it's for the bypass, but do you think it's big enough? Jeez, you could nearly fall in!

Are you putting a W2A core in that adapter, or in the manifold?

Methinks maybe this will be another twincharge setup? That's the reason for the, ahem, whopper of a bypass port?

Put your thinking cap on and help us all come up with a good way of distributing the boost better on these forward discharge SC's. Our front cylinders really do run leaner & meaner than the rest.

LOL nothing so well thought out in the flange i'm afraid John. My CNC dude basically stuffed up, but does me such a good price i didn't have the heart to make him do it again. The bypass port basically follows the mounting face of the SC (M122 off a GT500).

The reason for the 'plenum' is twofold. 1) A easy mounting solution for me and saved stuffing around sourcing another snout; and 2) raising the SC discharge port and bringing it forward should help with the cyl distribution. By how much only time will tell but as it's more like a front mount TB i figure it can only help and unlikely to hurt?

I'll mount a WI injector in that front angled face of the plenum and one pre SC as well to cover all bases

Needs to be running by 12th Aug for a track day...actually needs to be running well before that for tune and shakedown so the pressure is on.

[Zuffen]

I now have good distribution (all plugs look the same) due to the intercooler system.

If you could lift the supercharger up and put a flat plate under the discharge to force the air to to turn 90degrees then flow down into the manifold it would improve things a lot.