What do you guys think of this?

This must be a rebuild of a stock block... New original T25 stock turbos as well.

 

Surely an old zed wouldn't take this?

 

 

Here is the link:

 

http://specialtyz.com/blog/?p=441

What's not to believe? Always take us figures with a pinch of salt, but the power comes from letting it breath and race fuel

 

I've been running 700hp through a stock bottom end without issue. Can't vouch for how long it will last but has done 3 events with no drop in compression

I don't disbelieve it bud.

I think it's cool... But surely you need a newish lump/tubs to start with?

 

Nice info.

It's good to see where Nissan let her down and where we can pick up :)

Do you need newish ones to start with - no, will it break if they're already on the way out, then yes :)

 

There's plenty of original lumps out there with decent compression that will take the abuse, same for stock turbos with no play in the shaft and not smoking

Edited January 15, 201411 yr by jaffa

what do people consider good compression to be on a stock engine? that would allow it to be modded up

It's good to see where Nissan let her down and where we can pick up :)

 

Why do you think Nissan let her down? At the time all Japanese manufacturers adhered to the "gentleman's agreement"

of not going above 280bhp domestic and around 300bhp export.

What do you guys think of this?

This must be a rebuild of a stock block... New original T25 stock turbos as well.

 

Surely an old zed wouldn't take this?

 

 

Here is the link:

 

http://specialtyz.com/blog/?p=441

 

 

im already there on stock turbos at 22psi so yes it can be done

My auto turbos have had 15000 miles at 16 psi 430 engine 370rwhp. They are not showing any signs of death.

What's not to believe? Always take us figures with a pinch of salt, but the power comes from letting it breath and race fuel

 

Well James knows a lot more than me but have to disagree a little with this one :) power comes from boost the race fuel will just let you boost more safely. For example if you can achieve max boost on pump fuel then race fuel will not give more power but will increase the safety factor for detonation. My old TD05 setup maximum/optimum boost was around 1 bar and this could be achieved on pump fuel but was borderline for detonation so we used water injection to increase the safety factor. In my case no amount of race fuel would have increased power or if it did would be minimal however the safety factor would be greater and therefore less chance of blowing the engine. However with the bigger turbos such as those that James uses detonation will occur well before maximum boost and race fuel will enable more boost hence more power :) that's my take on it in simple terms but I don't get more technical than that anyway

Well James knows a lot more than me but have to disagree a little with this one :) power comes from boost the race fuel will just let you boost more safely. For example if you can achieve max boost on pump fuel then race fuel will not give more power but will increase the safety factor for detonation. My old TD05 setup maximum/optimum boost was around 1 bar and this could be achieved on pump fuel but was borderline for detonation so we used water injection to increase the safety factor. In my case no amount of race fuel would have increased power or if it did would be minimal however the safety factor would be greater and therefore less chance of blowing the engine. However with the bigger turbos such as those that James uses detonation will occur well before maximum boost and race fuel will enable more boost hence more power :) that's my take on it in simple terms but I don't get more technical than that anyway

 

disagree, we have good fuel here so we can pretty much boost up to 2 bar on pump fuel, and race fuel let's us boost higher as it resits knock better. The other advantage of knock resistance being you can chuck more timing at it, which will give more power again at same boost level and faster spool

disagree, we have good fuel here so we can pretty much boost up to 2 bar on pump fuel, and race fuel let's us boost higher as it resits knock better. The other advantage of knock resistance being you can chuck more timing at it, which will give more power again at same boost level and faster spool

several degrees more on v power i find

I would be more than happy with 400bhp :) Nice to see they have potential

disagree, we have good fuel here so we can pretty much boost up to 2 bar on pump fuel, and race fuel let's us boost higher as it resits knock better. The other advantage of knock resistance being you can chuck more timing at it, which will give more power again at same boost level and faster spool

 

Like I said :confused1:

 

I've used race fuel. Put race fuel in it's makes no difference however it enables you to make changes and it's those changes that make more power. Add more degrees of timing and you'll get more power on any fuel but you'll also get detonation the higher octane simply prevents detonation.

Actually I'm gonna retract a little bit. Used race fuel years ago on an RG500 and saw good gains as a result of cooling (I think) and some increase in the energy value of the fuel. So 2 stroke saw an improvement but didn't see squat in 4 stroke other than knock resistance. That's my experience anyway :)

It's because it's American BHP lol

Not really Lee. They just know how to tune their cars. Noel has now unlocked the potential that has starved the gains these cars can make on stock management as most people, including myself have been running around on generic chips with basic mapping. Most generic chips in their most basic of forms have been around for YEARS and only minor tweaks were ever made to increase fuel and adjust basic safety seconds. Noel works with more parameters and as has been seen, tuning to the individual cars is where the best gains are made. It's all about having a good condition block and turbos and more importantly, the correct mapping. I am quite pally with Charles Park who owns Powertrix in San Diego and when I was last his he showed me his stock-block Z. His high HP figures are backed up by very good 1/4 mile times.

 

Unfortunately a lot of Z32s have been poorly maintained and poorly modified which is generally why a build is suggested and I generally would say that's what you want to do if you don't know the history of the car. A stock block and heads are actually highly underrated and can take quite an increase in power given the correct fuelling and breathing mods.

Edited January 15, 201411 yr by Funkysi

Fuel can make a massive difference, a lot of the yanks are now using e85(im sure simon is better informed than myself on it) the far higher octane means they can run so much more boost SAFELY.

As si said noel has made massive headway for us lot, he even had his own car virtually stock, stock block and tubs and injectors to 430hp, so it really shouldn't be a surprise. I believe the stock bottom end record is now about 900hp, obviously no bolt ons are stock though.

By bottom end you guys are saying from the pistons down, correct? If so where did the 500 bhp piston meltdown figure come from?

OK I'll rephrase that.

Nissan didn't let her down in a way. But it would of been nice to of seen a Nissan Supercar spec if this is the case of these simple mods... Even if it be just a few tweaks.

 

I still don't believe in spending thousands on a car just to have the Supercar name and at least Nissan could of shown that back then.

 

I still think the 300zx is a very understated car.

I mean it does annoy me that everybody talks about Skylines, Supras, Ferraris and Lambos.

 

The 300zx is as good and on par, but why not the recognition.?

I still get asked "wow, what a beautiful car, what is it?"

 

Maybe a bit more power would of done it?

 

 

:-/

 

 

 

Why do you think Nissan let her down? At the time all Japanese manufacturers adhered to the "gentleman's agreement"

of not going above 280bhp domestic and around 300bhp export.

Nissan were the first to have to apply the 280 limit, the 300 was the first car to have it apply, they soon realised they could be liberal with roughly 280 with cars throwing out more than 300 or so. It went out the window fairly quickly I think.

The z32 could have had an ecu that was better mapped, or run at more respectable 12psi. It would have broken 280 though, he'll there's even two restrictor rings in the mid pipes to reduce HP a few. It's not that it fell short, it was deliberately strangled.

By bottom end you guys are saying from the pistons down, correct? If so where did the 500 bhp piston meltdown figure come from?

 

Yeah, that figure is the guesstimate for reliability. Based upon age and wear. Plenty of people in the US of A are running over 600 on a stock bottom end, Jaffa is running good numbers under track conditions.

The issue is how long does will it last, the answer is the more power the shorter time.

However if your bottom end is already damaged, most don't even know. At that point well it won't last long, the resultant failure could render your shiney new turbos a write off too. Net result false economy.

By bottom end you guys are saying from the pistons down, correct? If so where did the 500 bhp piston meltdown figure come from?

 

A bit of an old wives' tale that came about by the restrictions of tuning. Ideally you do want to fit forged pistons at that stage as your engine would be coming out for new turbos for getting that sort of power and it makes sense and it does give you added piece of mind and added reliability as there are times were pump fuel isn't up to par, but the stock block can take quite a bit providing you have the supporting modifications, so that's breathing and fuelling. Melted pistons in most cases come from the fuelling, or lack of, which lead to detonation. A forged engine will melt if the fuelling is all to cock. It can take a little more as the pistons are more dense and can absorb heat better than cast material, but the principles are essentually the same.

 

The reasons we do see 'melted pistons' are because of inadequate tuning/maintenance in almost all cases. The stock turbos have a limit, but you can wind those up to about 17/18 PSi with no problems. Fit larger injectors, a good and well set up boost controller, fully mapped chip and all the breathing modifications and it'll be reliable providing you started off with a good lump before hand. A worn lump, the wear will accelerate. A good lump that's well maintained and it'll be fine.

 

The real restrictions are not really the block but the breathing and fuelling peripherals that Nissan used at manufacture, so that's intake size, injectors and intercoolers. The turbos, block and heads are all pretty good and rather strong.

 

Avoiding detonation is key and this is done from creating the lowest charge temperature you can coupled with the optimum fuelling/timing.

Edited January 16, 201411 yr by Funkysi

There is lots of discussion on here on how to get more power from turbo'ed engines but are there any simple methods of getting a few more BHP from NA engined Z32??

Yes paul same principals apply breathing more in more out after usual headers exhaust airfilter its time to look at cams then headwork throttle bodies x6 higher compression higher rpm and so on

 

Sent from my GT-I9505 using Tapatalk

There is lots of discussion on here on how to get more power from turbo'ed engines but are there any simple methods of getting a few more BHP from NA engined Z32??

 

As silver line says tuning an na is a fairly similar principal. It needs to breath, although with na's more attention needs to be put into how it breathes as it can alter the driving characteristics.

Tbh with you though it's a waste. Tuning any na engine is often not very effective. To gain a 50% hike in power is going to mean a lot of hardwork and money. It is far cheaper to in plummet sone kind of forced induction.

Cheers, yes I know what you mean, the NSX was strangled using a cast iron manifold, I have changed that for headers and it also has an ARC airfilter system fitted.Really not sure what the gains are, except to lose a bit of weight and it also sounds very nice.