Time for an engine rebuild?

[Gonzo12c]

A first step upgrade in the turbos would be the JWT 500s

http://www.conceptzperformance.com/...2&Car_Type=300&UID=201403242349532.24.125.176

Cost about £1500 maybe to get them to your door

 

[shadowman]

A first step upgrade in the turbos would be the JWT 500s

http://www.conceptzperformance.com/...2&Car_Type=300&UID=201403242349532.24.125.176

Cost about £1500 maybe to get them to your door

Very nice. This looks like it would be ideal. If I did go for this upgrade over rebuilding the stock turbos, given the extra power these would provide...I would need to strengthen the gearbox/transmission? And I never really understood the idea with this detail about sending in your original cores and paying extra for the core amount? Showing my ignorance here but what does all that mean? I just can't buy new turbos...I send them the cash...they give me my new turbos?...oh yeah and send in your cores?? Eh? Pay extra??

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[Gonzo12c]

The trans would handle that power easy enough but clutch/flywheel could do with an upgrade to cope with the power.

Turbo wise the core charge would mean you send in your old turbos after you got the new ones but again ball bearing type like these again would be further improvement.

http://www.conceptzperformance.com/...3&Car_Type=300&UID=201403242349532.24.125.176

The extra you pay for the others is due to the fact that they use the housings and machine them bigger hence the low price.

Bigger turbos won't get you the full potential unless you have the rest to compliment it hence you start getting into the 4k mark plus paying someone to build it on top of that.

 

[shadowman]

Ok that makes sense. If I did go for turbos like these I'm not looking to squeeze out their full potential anyway but it would be nice to know that the tutbos are there in case I should change my mind. So if I simply rebuilt the engine with these bolt on tutbos plus fly wheel upgrade, new intercoolers, boost controller and decent ECU remap and considering I have a performance exhaust fitted already... what kind of power would I be looking at?

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[Gonzo12c]

On top of that injectors would require an upgrade as although it has been done to get 430bhp iirc from standard injectors it will then become the part under strain if you try to push on standard ones. So as long as the intake is running on a dual intake and the rest of the parts were of good quality then 450 would be an easy target to reach with more left in the tuning or on alternative boost controller settings for when required.

Another hot argument along this line is quality if parts as well as I'm sure there is some out there that think their 200 quid eBay intercooler is as good as a 2k Greddy unit and then are disappointed when their dyno run doesn't reach the target they thought it would.

The engine needs to breathe most efficiently to be able to produce the power. If though a full rebuild is being done then it makes sense to use Wiesco pistons and Eagle rods as these are relatively inexpensive. Always look to go above and beyond to build a strong and reliable engine as the last thing you want is to spend several thousands and the engine last 5 minutes as corners were cut there is certain people that have done that and paid the price. My plan on my build is to use uprated wrist pins on my pistons that are rated to 1200bhp! It's not that I'm looking to reach that figure it's just that I'm building in a comfort factor as I'll be using nitrous.

 

[shadowman]

Nitrous eh? I have no need for that It must be great fun though but that's one way to go to burn up an engine that's not been configured and strengthened for it Saying that the VG30DETT is built like a tank so it can withstand some abuse. But good on you for piping in a nitrous kit as well. Very nice. Not sure I'd be comfortable with an ebay intercooler for that kind of price. I don't want to get into Greddy territory either but somewhere in the middle would be fine as long as its a durable part that can cope with the uogrades. I'm not looking for precise dyno figures. I just want a little more power available over when I want it.

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[Gonzo12c]

Intercooler wise a lot of people are against front mounts firstly as it is not to their taste and secondly an illusion that it creates cooling issues as it sits in front of the radiator. You will get arguments for and against all day long which hold no evidential first hand proof.

Side mount wise it would be ideal to create more room for airflow from the front, with a different bumper, or the rear by removing and relocating the parts that are restricting in that area. I saw a set of Stillen side mounts up for sale in the US the other day. Ashspec are another good make of side mounts IMO. Then you get into the territory of US company own brand ones such as Z1, CZP or AMS etc. There is a HKS front mount on eBay at the moment. I myself have a Greddy 2 row front mount on mine as it creates maximum airflow through it along with my wings west bumper.

A lot is personal preference I can just give my engineering view and others will have their own view as I said and swear that their eBay front mount is a good as a Greddy one. It all gets quite comical

 

[shadowman]

Intercooler wise a lot of people are against front mounts firstly as it is not to their taste and secondly an illusion that it creates cooling issues as it sits in front of the radiator. You will get arguments for and against all day long which hold no evidential first hand proof.

Side mount wise it would be ideal to create more room for airflow from the front, with a different bumper, or the rear by removing and relocating the parts that are restricting in that area. I saw a set of Stillen side mounts up for sale in the US the other day. Ashspec are another good make of side mounts IMO. Then you get into the territory of US company own brand ones such as Z1, CZP or AMS etc. There is a HKS front mount on eBay at the moment. I myself have a Greddy 2 row front mount on mine as it creates maximum airflow through it along with my wings west bumper.

A lot is personal preference I can just give my engineering view and others will have their own view as I said and swear that their eBay front mount is a good as a Greddy one. It all gets quite comical

Actually instead of going for the single central front mount I would just replace the stock side mounted coolers with some aftermarket ones of similar design. So yeah the stillen model you mentioned might be ones to look at. I abhor making changes to the body as the styling is already beautiful. Some kits are very cool but a lot of them are horrendous and just ruins the car. My only change was an aftermarket 99 spec spoiler...that's it and that's only because the stock rubber one was heavy because of the water it was letting in. Minimal changes...less is more

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[sayers]

Mr Shadow man, if you want a reference for Mike , then give me a call , the engine he refers to is mine, I would mention there is one thing wrong with his statement , my car does not put out 430 BHP, Its nearer 470 with meth, and once the boost pressure is sorted its expected to make circa 530, anyway enough of ponies , my number is 07929 159828. Sayers

 

[shadowman]

Mr Shadow man, if you want a reference for Mike , then give me a call , the engine he refers to is mine, I would mention there is one thing wrong with his statement , my car does not put out 430 BHP, Its nearer 470 with meth, and once the boost pressure is sorted its expected to make circa 530, anyway enough of ponies , my number is 07929 159828. Sayers

Thanks very much mate.

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[Gonzo12c]

The only issue I have with the standard bumper is with aftermarket intercoolers I think it restricts the airflow somewhat which is the reason I would change it. Either way everyone is entitled to do their own thing and if all our Zeds looked the same we would be like the Honda's I see at the shows ha.

Should give you some idea of which way to go with the rebuild and such now

 

[shadowman]

The only issue I have with the standard bumper is with aftermarket intercoolers I think it restricts the airflow somewhat which is the reason I would change it. Either way everyone is entitled to do their own thing and if all our Zeds looked the same we would be like the Honda's I see at the shows ha.

Should give you some idea of which way to go with the rebuild and such now

Thanks man. Appreciate all the info

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[Mikey Bean]

thanks neil and sorry for getting your power wrong haha

 

[Mr HollowPoint]

Just a slight correction on what Marty was saying with injectors, mine is currently running roughly the same as Neils, except I'm not running any Meth and I'm on standard injectors. I reckon based on my last dyno run which was at 14 psi and produced 406bhp (I had a couple of issues at the time I wasn't aware of and have since sorted out, so should probably have hit around 430 like Neils did pre-meth) and my ECU is mapped for 18psi, I'd say the 'safe' limit for standard injectors is probably around 500.

I can vouch for Mike as well, although I built most of my engine myself, I did call on Mike a few times for advice/assistance where needed. He's the only person I trust to work on my Z other than me and knowing the guy personally, he's very honest and trustworthy.

 

[Mikey Bean]

awwww you guys, im going to cry

 

[Gonzo12c]

http://bit.ly/1l22LuE

Stillen

 

[shadowman]

awwww you guys, im going to cry

Hehehe. You guys are cool It's good you guys can all vouch for one another. I know there are an awful lot of cowboys out there.
I was at work today reading through all the replies. I mentioned my intention to rebuild my engine to a colleague at work and he asked me why I don't just do the work myself? I told him I could give him many reasons why no...no space, no garage, no tools, no expertise (my first rebuild). So he said well there's always a first time and said I should maybe look at renting out a unit so I can my car in and do the work there....unlikely to find such a unit.

Anyway the idea played on my mind. Could I attempt such a huge task on my own even if I had the tools? I guess I could. But I would dread making a mistake. So I spoke to my neighbour who is an expert stripping down V8's and rebuilding them. I explained what was happening with my car and asked for his help. He offered to let me use his garage space, his drive way, his tools and power and his expertise when he wasn't workinh of course. He said he would even get a key cut so I could let myself into the garage to work on the engine whenever I want. This was only about an hour ago. I was completely blown away. He gave me the link to download the car's manual as well. He doesn't want to take any money either but I will definitely pay him. I can't not do that. I'm just still shocked at him and his wife's generosity They are both bike owners and he said he is ok to give up half his garage for this work. He did say I could have picked an easier car to work on but if I take my time then I will achieve what I want and I can always call on him for help. I haven't decided I'm going down this route yet but I do love the idea of working on my car myself. My dad would like it as well. The learning curve won't be a curve but more like a vertical line but if I can rebuild that engine and get it back in the car, the experience gained would be so invaluable. I hope I can call on you guys for help if I do choose to do this. I am sure there will be many questions

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[Gonzo12c]

So many people have started out this way and it's the way to go there is plenty of help on here for when you get stuck on something. I have my Zeds parked up in a workshop I rent and it is just ideal.

Good luck with it and get a build thread started up so we can all follow the progress

Marty

 

[candy red]

Good luck shadow man ,doing it your self can be really satisfying just take you time and ask for help when not sure many of the guys on here are very knowledgeable about engines and mod as for your neighbour he sound great will his wife cook you tea :lol:

Derrick

 

[shadowman]

So many people have started out this way and it's the way to go there is plenty of help on here for when you get stuck on something. I have my Zeds parked up in a workshop I rent and it is just ideal.

Good luck with it and get a build thread started up so we can all follow the progress

Marty

Oh man thanks for your support. I will definitely keep you posted if I do follow the DIY path. Thank you for the encouragement
Will see if I can keep a video journal of progress too. I am sure his wife will make the teas if I ask really nicely hehe

Good luck shadow man ,doing it your self can be really satisfying just take you time and ask for help when not sure many of the guys on here are very knowledgeable about engines and mod as for your neighbour he sound great will his wife cook you tea :lol:

Derrick

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