GA High Comp Build

[edk]

Strip out everything but leave the passo seat, remove that once your there

This.

-phone-

 

[CoV]

Thought it's about time i did a more in depth write up of the build.

This is how the SUMMER build started:

Comparison of standard GA16 pistons and the Honda D16 pistons in the block:

Quick graph showing the improvements Dales porting made on the cylinder head:

rusty block:

Shiny powder coated brackets etc:

Parts back from Chesmans, lightened, balanced, honed, skimmed:

standard GA crank:

Genuine Nissan pump/cover, 115 quid from gspec, 475 quid nissan UK - jokes

cleaning block:

Block painting prep:

Enamel time to stop the engine looking hideous:

 

[CoV]

Engine assembly, graphogen assembly lube on bearings:

rocking the FSM:

Ghetto crank stopper for torquing flywheel and crank pulley bolts:

http://s29.beta.photobucket.com/use...2B-8D5F74B1FD40-339-0000008FE39D83D4.mp4.html
http://s29.beta.photobucket.com/use...75-9F6A426B1234-339-0000008FFCACB380.mp4.html

 

[Sam]

Yes!

Your catback was made with the stock manifold/downpipe in place wasn't it? That will explain the Mister aligned Exhaust with the new manifold

 

[CoV]

I'm not following you Sam. Surely it should go back into its normal hanging position?

I think it's the QG downpipe, not only does it push it backwards, the downpipe is quite a bit to the side. So much that the ARB was impossible to fit.

Off to see custom Phil on 24th November so I can get it sorted and get a proper look from underneath of what the problem is.

 

[Raceworx]

how much did all the work chesmans cost dude?

 

[Sam]

phone didnt allow me to describe it very well, the downpipe of the new manifold wont be sat in the same place as the stock one was.

Had the same issue when I fitted the ASP it pulled the centre section over to the side, I had a decat made to rectify the misalignment.

 

[CoV]

Hopefully the visit to Phil can provide a simple solution.

Chesman bill was around £500

 

[rowdy-GTi]

Loving the gazebo workshop! On a par with Dales green house.

 

[CoV]

Certainly came in handy, had to put that up when we had that period when it rained every single week. And when car was complete the wind proceeded to destroy the gazebo. As if it knew it wouldn't be needed again

 

[Raceworx]

what bore are those pistons?

 

[CoV]

76mm, +1mm oversize from STD D16 pistons

 

[Raceworx]

looks like there is plenty of meat left to go for a bigger bore i wonder if with bigger pistons you could get to 82 or 84mm that would take it to 1859/1951cc

how much material was left between the bores? i love the build you get my juices flowing mr cov..

 

[CoV]

The very early plan was to use my CA16DE 78mm pistons which would take it to around 1.7l, press fit and 1mm larger gudgeon pin meant machining the con rod ends. That was doable but then I would have needed a custom head gasket. Which would have been a big worry as we already know through dales turbo how strong a stock GA head gasket is and with my 280psi compression tests I'm glad I went with stock bore genuine Nissan gasket.

There was talk of using QG18 80mm pistons but head gaskets aren't compatible.

It's also deceiving unfortunately on how thick the cylinder walls are as iirc at top it's around 10mm between cylinders but tapers quite a bit thinner down the water jacket .

I'm already thinking when next year to bolt the turbo on

 

[RAJackson]

looks like there is plenty of meat left to go for a bigger bore i wonder if with bigger pistons you could get to 82 or 84mm that would take it to 1859/1951cc

how much material was left between the bores? i love the build you get my juices flowing mr cov..

QG18 pistons would be possible if you bored to 80mm. Some claims to have done it in the netherlands, but as cov says its also been theorised that the water jacket widens lower down, thinning the cylinder walls considerably.

But. That information was taken from a usdm ga16de block, which is also known to be considerably different to the uk delivered ga16d(n)e engine.

So yeah. If you can bore out to 80mm, your qg18 pistons are a direct fit to ga16 con rods in every way taking you up to 1800ish cc.

 

[CoV]

I had a good look down the water jacket when it was apart and it definatly narrows like the USDM block which is a massive shame as it could be a beast.

I may skip the ITB and go straight to boost, have got all the parts ready.

 

[Raceworx]

there is a company near me than specialises in makeing custom linners.. i like to dream sometimes..

 

[CoV]

Honestly if I won the lottery I would still have a GA and make it mega and sleeve it etc but this engine owes me way too much already so time to go bang for buck value, boost. Well maybe next year.

Beyond that a simple sr20ve with 16 cams, relatively trouble free would be nice

 

[Raceworx]

you gone drop 7psi on her as she is at the moment? that would kick ass a T25 from an S13 CA18

 

[CoV]

No chance with the compression it's running. If it wasn't my daily I might have tried it.

YCP vitara pistons iirc gives 8:1 then boost the shit out of it. Got dales old turbo but from what I read it maxes out at 250bhp so want bigger plus it's got a little shaft play