Sloane's Engine Build Up

[BOBBYr34]

The ports got a bit of a clean up, removing steps in the radius etc, and that was about it. I didn't remove the 'humps' in the exhaust ports, just my choice .

Just to prove I ain't ripping off web pics, my ugly mug lol. Putting grubscrews into crank, loctited in to be sure.

Crank getting fitted and measured up for bearing clearances 0.0015"-0.002" from memory, thrust 0.011". Girdle torqued up, and you can just see the 3 long studs that have been shortened to clear sump and driveshaft tube. 55FT-LB.

Pistons and rods getting some attention. Piston rings clocked as per service manual.

Fitting the piston and rod into the bore. Rod bolts, I tightened them using a bolt stretch gauge on the 3rd cycle. 0.0055" stretch.

Today piston to deck height will be measured and if all good it'll all be put together permanently.

Hey Sean,

Looking good , let me know what the deack height is and what head gasket you using ( i have a nismo 0.9mm gasket if interested). Why i ask is john has Set my motor to have 33thou squish, try and aim for that if you can.

[GTRsean]

Hi Bob,

Block had about 0.006" taken off the deck, I was told.

Deck height of pistons' quench measured up 0.016-0.017'' proud of the deck, 0.003-0.004" on the other side squish.

He is using a cosworth 1.1mm (0.0455") head gasket.

So squish will be 0.0285". So over 0.5mm, it should be enough clearance when engine is running in the higher RPM ranges.

I aim to have the cylinder head on and torqued up tomorrow.

[BOBBYr34]

Hi Bob,

Block had about 0.006" taken off the deck, I was told.

Deck height of pistons' quench measured up 0.016-0.017'' proud of the deck, 0.003-0.004" on the other side squish.

He is using a cosworth 1.1mm (0.0455") head gasket.

So squish will be 0.0285". So over 0.5mm, it should be enough clearance when engine is running in the higher RPM ranges.

I aim to have the cylinder head on and torqued up tomorrow.

Hey Sean,

That is a tight squish i think its way to tight lower limit is 33 thou any lower then this may be a problem. I would do a dummy build to check this measurement to make sure.

And can you confirm the piston flat surface ( Piston squish area ) extends out of the block at 0.016 - 0.017" ?

Just a note on tight squish, the car will have problems idling and if it does idle it will be rough

[GTRsean]

These were measurements I took yesterday with the pistons at TDC, bottom end dummy assembled.

0.0045" under your 33 thou. He'll love the idle more then haha, barp barrrp barp....along with the cams.

I'll dummy fit head and double check gap with clay.

So I fitted head and measured the clay after lunch. Squish measured up at 0.038" with the head torqued down.

[GTRsean]

After dummy fitting the cylinder head, it was removed, head gasket was hylomared, then head was fitted and torqued in steps to 110 FTLBs.

Then cam caps were fitted and torqued to 10FTLBs. Timing accessories were then fitted and a dial gauge used to check piston Top Dead Center etc.

Cam gears set to 0, 0 degrees, as HKS cams are being used, and they can be fiddled with on the dyno at a later stage.

Block painted in heatproof matt black to see leaks easily

Timing done! Nice colour.

Harmonic balancer still needs to be torqued up. Might make up a tool to hold the balancer at the front as I'm torquing up the crank bolt, instead of twisting the crank if I held it at the back of the crank....

[Piggaz]

What was the CR you ended up with Sean? Have you worked that out? I apologise if you have said it already

[GTRsean]

bore: 86.5mm

stroke: 73.7mm

head gasket thickness: 1.1mm

deck height: around -0.013in (one side of piston was .003", the other side was .016")

piston dome: -16.2cc

combustion chamber: 64.5cc

Hey Paul,

I calculated static CR at around 9.2:1, keeping in mind this engine is using non standard cams, so upping the comp a bit will help with off boost drivability and regain a little efficiency back at low to mid RPM due to the longer duration cams (264deg 8.8mm lift).

[Piggaz]

Sounds good. The 1.1 mm gasket, what brand was it?

[Sloane]

Hey Paul.

1.1mm gasket is a Cosworth

http://www.skylinesaustralia.com/forums/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=360910

[GTRsean]

It's nearly done. Just waiting on an engine coolant hose kit, then the ancillaries can be fitted up.

[SiR_RB]

looking good mate, and didnt take that long either !

will this be run on E85 or 98 octane?

[GTRsean]

Well it has been a few months, and he's been car-less!

He'll be sticking to 98 for now....

Just need a damn coolant hose kit!! in black.

[snozzle]

liking the pics guys, any reason as to why you used a cosworth hg instead of a nitto?

[Sloane]

liking the pics guys, any reason as to why you used a cosworth hg instead of a nitto?

Was available at the time

[Sloane]

Ordered coolant hoses earlier this week from performance-wise.

coming from Hong Kong I hope they would hurry up and get here

[Piggaz]

Some kid is probably kicking them down the street!

[Sloane]

Should be here Tuesday I am hoping.

[farch]

great now i'm going to have to put the 4.11 back just to keep up again........

but seriously looks good, keen to hear and see it go......hard! will have to go cruising when i get back buddy.

[Sloane]

great now i'm going to have to put the 4.11 back just to keep up again........

but seriously looks good, keen to hear and see it go......hard! will have to go cruising when i get back buddy.

Bloody Oath... but mind you you have the torque

Feels like ages without my car lol

[GTRsean]

Blah blah.......back on topic!! put the engine in today and fitted up the gearbox. Sucks doing it all by yourself..

This was after spending the morning sorting out all the minor crap before the engine could go in...

Pics will be up tomorrow.