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Typhoon43
 
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Looking great man. Will the stock Throttlebodies handle that extra air? Back when I had my Phoon, my buddy had a 91 TT and from a roll it was just SICK. He's absolutely destroy me at cruising speed pulls. 3rd gear in those cars is such a fricking rush, even at stock boost levels. Keep up the good work.
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Old 05-13-2009, 05:41 AM Typhoon43 is offline  
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Lurker
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^ The 2560 isnt much bigger then the factory one. He has a long ways to go before throttle body becomes a problem.
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Old 05-13-2009, 06:47 AM Lurker is offline  
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Typhoon43
 
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Maybe it's the angle Lurger. That exhaust housing looks A LOT bigger to me for some reason. Just thought he might do something for the flow. Any plans to port the intake while you have it off? Not sure what helps on the NiSMOs.
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Old 05-13-2009, 07:57 AM Typhoon43 is offline  
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Jehannum
 
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Originally Posted by typhoon43 View Post
Maybe it's the angle Lurger. That exhaust housing looks A LOT bigger to me for some reason. Just thought he might do something for the flow. Any plans to port the intake while you have it off? Not sure what helps on the NiSMOs.

The intake is just fine - I could make an additional 15HP at great expense, if I went with 2.5" piping from the turbo to the throttlebodies, which would require new intercoolers, new piping, new throttlebodies, and then hogging out the plenum.

I should make my power goals easily with the setup I have now, though, and not have to worry about fabricating the spaghetti-plate of pipes through my engine bay.

The exhaust turbines are about the same size - both are T25 housings, it's just the compressor side that's bigger.

Putting attention there is polishing something that's already pretty damned good - the Z32 has a dual throttlebody setup, and where you see significant improvements across the whole powerband is when you go dual air intakes up front (which is in the plans).
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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 05-13-2009, 09:27 AM Jehannum is offline  
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#19  

Jehannum
 
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Dropped the block off at machine shop jail today.

Plans are: forged pistons (likely CP), new bearings, new rings, ARP hardware, cometic MLS head gaskets, and whatever various machine work is required.

I'm not anticipating much on that front, as the decks on the block are straight (checked with a straight-edge), and the heads are flat as well.

I'm having them test the heads for pressure and hot tank the whole thing, but other than that, I'm pretty sure it's good to go.

I'm undecided as yet with regard to piston coatings.
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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 05-19-2009, 08:27 PM Jehannum is offline  
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#20  

[H]ard|On
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What would the coatings cost? I remember reading about it seems worthwhile to keep detonation down.

Why does your old turbo compressor outlet look so much bigger than the "new" one's?
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Old 05-19-2009, 11:51 PM [H]ard|On is offline  
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Jehannum
 
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What would the coatings cost? I remember reading about it seems worthwhile to keep detonation down.

Why does your old turbo compressor outlet look so much bigger than the "new" one's?

1) there's a local shop that does ceramic coatings that would do my pistons for $200.

2) I dunno; they're exactly the same size. They've both got that triangular three bolt output flange to bolt the hot-side pipes to.
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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 05-20-2009, 05:04 AM Jehannum is offline  
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#22  

Jehannum
 
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The block is all torn down at the machine shop, fresh out of the hot tank. Oddly enough, all the pistons (even the one that was down compression) were looking just great.





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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 05-28-2009, 04:53 PM Jehannum is offline  
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Jehannum
 
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Got the pistons for the 300ZX today. Took them two weeks(!) to get here, guess they had to mine the bauxite or something. Nothing too special - Wiseco 87.5mm forged pistons with ring sets and full floating wrist pins.







I was going to drop them off today to have the tops ceramic coated and the skirts dry-film lubed, but the coating shop closes at 3PM on Fridays. Guess I'll drop them off Monday.
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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 06-20-2009, 01:37 PM Jehannum is offline  
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#24  

[H]ard|On
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Ah nice, the coatings will probably pay off.
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Old 06-20-2009, 03:17 PM [H]ard|On is offline  
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#25  

rich4rdee
 
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holy shit! a badass project and the infiniti?

ballllinnnn
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Old 06-21-2009, 01:34 AM rich4rdee is offline  
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#26  

BigWorm85
 
Quote:
Originally Posted by Jehannum View Post
Got the pistons for the 300ZX today. Took them two weeks(!) to get here, guess they had to mine the bauxite or something. Nothing too special - Wiseco 87.5mm forged pistons with ring sets and full floating wrist pins.







I was going to drop them off today to have the tops ceramic coated and the skirts dry-film lubed, but the coating shop closes at 3PM on Fridays. Guess I'll drop them off Monday.

ooo ahh wiseco... Have you considered upgrading to the heavy duty wrist pins they offer? I've taken some turbo honda engines apart that used the stock tapered style wrist pin...They had to be forced out.

Coating the combustion chambers in ceramic might not be a bad idea either.
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Old 06-21-2009, 01:52 AM BigWorm85 is offline  
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Jehannum
 
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ooo ahh wiseco... Have you considered upgrading to the heavy duty wrist pins they offer? I've taken some turbo honda engines apart that used the stock tapered style wrist pin...They had to be forced out.

Coating the combustion chambers in ceramic might not be a bad idea either.

I'm pretty sure the pins they came with aren't tapered, so I hope I've already got the heavy duty stuffs.

The original plan was to do a dry film lube on the main and rod bearings, wrist pins, camshafts, and valve stems, as well as ceramic coat the pistons, the combustion chamber, and the valve faces.

My machine shop says that the point of diminishing returns for the money spent is such that it's not worth it to do all that coating.

Quote:
Originally Posted by rich4rdee View Post
holy shit! a badass project and the infiniti?

ballllinnnn

Did you miss the part where insurance is paying to have my 240Z rebuilt, too?
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Your powers are useless! I'm wearing my tin foil underwear!

1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.

Last edited by Jehannum; 06-21-2009 at 06:03 AM..
Old 06-21-2009, 05:56 AM Jehannum is offline  
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#28  

Mayo07J
 
Oh boy. I'm up for the same thing on my Z. I had really low compression on a couple cylinders. Within the next week I will be doing the same, minus the pistons unless they are needed. Too bad you live so far away.
Old 06-21-2009, 05:14 PM Mayo07J is offline  
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#29  

Jehannum
 
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Picked up the pistons from the coater shop today.







Also ordered just about every replacement hose for reassembly (all in 4-ply silicone), a new clutch, a new radiator, and metal hardpipes for the boost hoses. Goodbye, $1500. Still need to pick up new exhaust manifold gaskets, oil pan gasket, intake manifold gasket, plenum gasket, and valve cover gaskets. Ugh.
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1992 300ZX: Not stock, 433 RWHP
1971 240Z: Toyota front brakes, 123 RWHP
1967 Pontiac GTO: not stock.
Old 06-24-2009, 04:35 PM Jehannum is offline  
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