Back Into It.

[Simestime]

Hi guys,after a long 4 months of buying a new house and building a 5x8m shed,i am finally ready to get back into my resto.One thing that has been eating away at me (other than not being able to do anything on the zed)is which head to use when the time comes.I have done plenty of research on the heads i have and im torn in what to use,so im after advice from eveyone that has run different combos and knows the difference in performance.

I plan to run(and have) an l26 bottom with flattops,triple 45's, elec dizzy,2 into 1 extractors into 2 1/4'' exh,original 5 speed(1/75 model),and original r200.

Ok now i have three blocks 2xl26 and an f54 l28.Both l26's are pretty fresh rebuilt and the f54 has serious scoring from previous owner.(but id like to stay with l26 for original and less cost of rebuild).The heads i have are an efi e88 with c grind cam and external spray bar.The other is a n42 with tighe cam .490 lift and short duration like 248 or something and 112 lobe centres,and set up by a workshop that knows datsun heads.

Reseach has told me most peolpe have n42 heads on na engines.while race guru's recommend the efi e88.

Id like the cr to stay up around the 9.5 to 10:1 so a longer duation cam would loose that.its going to be a street driven car so low tourque is a must.

Apparently theres not alot of difference in the combustion chamber but isnt the e88 a closed chamber and the n42 an open?(i havent taken the e88 head off the running engine yet)

Anyway im open to options and opions so i can make my mind up and stop thinking about it constantly.

Thanks.

[theremm]

I have been told the e88 efi head is the best to use if it ha the smaller heart shaped combustion chambers.

 

If u aren't going to use that one I would be interested to purchase off you for my own applications

[gav240z]

It's all relative to how much power you're chasing and how much port work / head work you're willing to do. Standard the N42 will be better for a larger L28 motor as it will have the larger valves.

 

Any head can be made to perform it's just a case of how much coin you want to throw at it. For your mods I'd stick with N42.

[Simestime]

Well power wise im looking at around probably 200 hp at the crank but low and mid tourque on a street driven engine needs to be up mainly.Being a nissan datsun man all my life,i do like high revs too.I guess id like power between 2000 and 6000.So both the cams and heads are capable,but which will do it easier?The tighe cam has a nice high lift with springs and rocker assembly to match.That will probably be the better torque cam out of the two,but would it be better on the e88 head,with higher c/r ?

The n42 has had valve unshroulding at the shop and i have port matched to the inake and carbs.Slight shave and mill.I have always been led to believe that you shouldnt port the intake, only the exhaust for the street to keep the air moving.So ill just take at bit off the short turn and smooth out the ridges on the exh.

The efi e88 im not sure of work yet until i strip it down.I took the manifold off to see it had injector notches and took the rocker cover off to see the cam.

 

Ok so thats 1 for 1 on choice selection.Keep the advice coming.

[GongZ]

This may seem like an odd request, but could you add a few photos and some details about your shed please?

[PB260Z]

This may seem like an odd request, but could you add a few photos and some details about your shed please?

Ian, This thread may be of interest.

http://www.viczcar.com/forum/topic/11065-show-us-yourman-cave/

 

Cheers

[GongZ]

Thanks Peter - that was interesting

[Simestime]

The shed is 5x8 with a 3m roller door on the end and 2 bays of 3m and one at 2m.eave height of 2.4m and centre at 2.8m.I havent totally set it up yet but seems to be perfect for space around the car.I'll get some pics later today when its setup and organised a bit better.

Most quotes were around 6k for the kit and found this one for just over 5k.All bluescope steel with colourbond trimdeck,gliderol door and a bolted frame.12mmx 150mm dynabolts hold it all down.I put down a fairly hefty slab(25mpa,350mm trenches all round and 140mm on average in the middle.and 8mm ribmesh) that i poured and prepped, with concrete costing 2k.Once i hook up power it should be around 10k finished including council approval that was 1200.Im from the civil construction industry so done the lot myself but for someone else to do it, you can double that cost.I have painted the floor in heavy duty paving paint(smoke grey) and have a clear light whirlybird to go in yet above the work benches.Really happy with how it turned out but wouldnt use that company again just because of plans being inaccurate and very generic to all size sheds and not a specific plan.I picked them up on footing placement for the end walls and the sales dude couldnt tell me anything.The computer program placed them inncorrectly on engineering drawings so luckerly i questioned it.The top capping had to be cut and notched on every rib,that was a pain in the ass.Some hardware i run out and had to buy more and some had heaps of leftovers.I didnt build the shed in the 7 day window after delivery so couldnt claim the loss.

Every company i spoke to were really nice about a sale until i told them i was building myself then turned a bit cold and tried scare tackticks to get them to build it.

[GongZ]

Hi Simestime,

 

Thanks for that info - it's all very interesting, especially the issues you had.

 

Was it $2,000 just for the concrete - or did that include reo?

 

Did you put the frame up on your own, or did you have a helper or two?

Any idea how many man hours it took to put the kit together?

 

When you say "The top capping had to be cut and notched on every rib" - do you mean the ridge capping? That would be about 80 notches! 

 

I look forward to the photos. Thanks again.

Edited November 29, 2015 by GongZ

[Simestime]

Ok i'll try to download pics now and see how i go.

Yes every notch on the ridge capping.Pain in the ass.Also cutting the angle at top on the side walls.

The 2k for concrete was including other stuff.It took 7 cubic meters at around 220 per cube(about $1800 with saturday delivery).Reo i got from work at $180 for three sheets (cheap),formwork and other related tools were a bit more,but i had most of it.

Mainly it was me putting it together with a hand from the missus to hold things plumb as i screwed it off.(the shed not the missus!)

I poured the slab on the 29th sep.Waited 2 weeks before drilling dynabolts and done a few hours after work almost every day and most weekends.So if you put man hours on it id say 2 weeks if it were constant just for the shed.But planning building approval,groung excavation,formwork and drainage are the most time consuming.

Had to wait 7 days after painting the floor too.But now the shelves and work benches are in there i can sort out where to put everything.

[Simestime]

Some along the way pics.

But still have an approach slab,whirlybird and power to go on.

May do some other things like add a window or pa door down the track,but this is good enough for now as im itching to get back on the car work.

[GongZ]

Hi again Simestime,

 

Thank you very much for answering my queries so thoroughly. 

That is a really good summary of the process and the costs involved.

 

I have been planning my shed and this has been an excellent insight to the process.

Now I just need a missus to help me and it should be plain sailing.

 

Hopefully others will find this topic (or maybe it should be split off.copied into a new topic on "Shed Building"?) - there must be others on this forum who would also love to build a "Zed shed".

 

Afterthought:

- Did you include a sum for drainage works in your overall estimate of around $10K?

Edited November 29, 2015 by GongZ

[Mr Camouflage]

There's a couple of shed builds on ozdat too:  http://ozdat.com/forum/viewforum.php?f=84

[Simestime]

Thanks,thats great i can help.Any questions you have please dont hesitate to ask.

Drainage didnt cost much as i dug the trenches,tapped in to the drain for the verandah,re concreted the drain to add the shed route and put in just less than3x3m lengths of pvc and some joiners,bends and glue.Total maybe $50.All gutters and down pipes were part of the kit.

If you would like any more pics on certain parts or process of the shed,i have plenty more.As you might have seen i had to cut down some trees and fix the retaining wall before i could start too.

 

 

Any more thoughts on the head selection anybody?

[GongZ]

Thanks for the link Craig - some great info there!

There's a couple of shed builds on ozdat too:  http://ozdat.com/forum/viewforum.php?f=84

[hmd]

 

Any more thoughts on the head selection anybody?

 

for the sort of compression you want, you better of selling the E88 efi head to group S racers who are restricted by the rule in what they can use.

 

Use that money elsewhere in the build. That is how I got my E88 efi head from a bloke in Perth.

[Simestime]

I would have thought there would be heaps of the e88 efi heads around,didnt they come stock on the r30 skyline?As mine has been retro fitted with spraybar i might hang on to it for a while longer as it is well sought after.Not being greedy just keeping future options there.But everything is for sale at the right price and the right time as i could use the money towards a set of koni's in a while.

[hmd]

only on r30 skyline hatch of certain year.

[gav240z]

only on r30 skyline hatch of certain year.

 

And nobody thought to save those cars from the scrap yard, so not many are left. Haven't seen any on the road in years. Also nobody thought an E88 head on 1 of these was worth anything..

[PB260Z]

Hi

 

Slight Hi-Jack

 

Shame we don't have a website like this for Aus

https://www.howmanyleft.co.uk/vehicle/datsun_240z#!tax

 

shows how many of any car are actually registered and 240Z's have increased in the last couple of years - Imports

 

[gav240z]

All the cars they nicked off us no doubt

 

Question is where would you get this data from? I don't think our government would allow for any sort of API to query their databases.

 

I remember looking at this site because I was curious how many FD RX-7s were left in the UK when I was looking for 1.

 

https://www.howmanyleft.co.uk/vehicle/mazda_rx-7

 

That's what a financial crisis does..

 

Many were parted out.. I guess it's all cyclical. Cars increase in demand, then as values drop and quality of cars get worse they drop, then at some point they swing up again when more are restored etc..

[PB260Z]

All the cars they nicked off us no doubt

 

Question is where would you get this data from? I don't think our government would allow for any sort of API to query their databases.

 

A lot of the required, if not all of the, data would be held by Veda the company behind Carhistory.

They currently have

• data on service histories
• data on valid registrations
• data on encumbrances
• data on stolen
• data on write offs 
• data on major repairs >$3K or thereabouts

Edited December 9, 2015 by PB260Z

[GongZ]

Hi

 

Slight Hi-Jack

 

Shame we don't have a website like this for Aus

https://www.howmanyleft.co.uk/vehicle/datsun_240z#!tax

 

shows how many of any car are actually registered and 240Z's have increased in the last couple of years - Imports

 

I have already had one turn at hijacking this thread - so I have started a new topic to reply to Peter's post-

Australian Bureau Of Statistics - Motor Vehicle Census, Australia

http://www.viczcar.com/forum/topic/14300-australian-bureau-of-statistics-motor-vehicle-census-australia/?p=170249

[Simestime]

After all the rude hijacking of my thread... (i dont care really),i took off the efi e88 head yesterday and took some pics for everyone to look at.when i was looking for info i couldnt find much.if you want more pics for the l6 head thread im happy to take more in better light.

[Simestime]

The cam towers have 3 shims but the cc of the chamber is 41 which i thought was standard,so why put in shims?the height is approx 107mm.

anyway enjoy.

this head will be for sale but one member has first dibs.