Is it still The Beast for East, or has someone else taken over?

Any pictures and specifications would be great.

so have we found out yet????

 

 

It is still unclear who has the most powerful ZX in the UK.

 

Someone with clear answers?:confused:

It is still unclear who has the most powerful ZX in the UK.

 

Someone with clear answers?:confused:

You will not get a staraight answer to this one atm mate, as there are certain high powered Zeds in this country that are still ongoing projects and are untested atm.

You will not get a staraight answer to this one atm mate, as there are certain high powered Zeds in this country that are still ongoing projects and are untested atm.

 

One of them mine :D

mine is :)

I have this on Video somewhere. I remember Adam, herman and someone else (may have been cybernet I can't recall) sitting in the boot of his car because his tyres were made by some elastic band company and he couldn't keep traction past 4k rpm :)

I think that was PaulC with his plastic tyres ;) I started a caption comp for that pic but I can't find the original :(

 

...another RR day was sorted where Alex had his done and I think it was Cybernets car that gained around 70bhp from changing the RR.:rofl:

And I was still disappointed ;) :D

 

Steve :)

It is still unclear who has the most powerful ZX in the UK.

 

Someone with clear answers?:confused:

 

I was refering to why Cj's motors new owner had to have it redone:confused:

It is still unclear who has the most powerful ZX in the UK.

 

Someone with clear answers?:confused:

 

Hi Jorgen!

I suppose we should take a trip over to the island to find it out!?

And bring our cars of course! :dance:

Hi Jorgen!

I suppose we should take a trip over to the island to find it out!?

And bring our cars of course! :dance:

 

Hi buddy;

 

Yeah, it is a very good idea. Bringing also CV 1515 would make 3 of us.

We could take the ferry from Esbjerg in Denmark. A nice trip.

 

Do you know which arrangement in UK that could be the best for us? :slap:

I am more that aware of the difference but they still give off generous numbers.

I watched ChrisC's car hit 500bhp on on Thors dyno pack running T28s and 555s

 

I think it was AdamR that had the same spec and did not make any where near that on the SE RR day but it did have problems and was running very poor.

 

Hi Mac;

 

Do you use original conrod bearings? If not, what type do you use? :hyper:

Hi Mac;

 

Do you use original conrod bearings? If not, what type do you use? :hyper:

 

Someone who has heard anything from MAC lately?

looks as tho jaffa has taken the spot over macca 609bhp..... it all depends whether maccas is rear wheel power or flywheel.

 

http://www.300zx.co.uk/forums/showpost.php?p=1278551&postcount=52

Mac's is RWHP

Mac's is RWHP

 

ah well thats another level then :D

Mac's is RWHP

 

Hi;

 

There are many assumtions about the difference between flywheel and rear wheels. 10%? 15%?

 

What do you think?

on a manual its about 15% i would imagine

on a manual its about 15% i would imagine

 

Many say 10%. That is obviously too low?

Percentage figures are often quoted for Flywheel to Wheel power as a very rough estimate, but its not really fair to use them, since you have both static and proportional power losses.

 

Static losses are a fixed loss that is not affected by vehicle power and proportional losses are those that increase dependent on the load (power) put on them.

 

A 200hp car that loses 40hp (20%) would not lose 80hp (20%) if its power was increased to 400hp, but then neither would it lose just 40hp still. A more accurate figure would be somewhere inbetween, closer to the static loss than the percentage loss !

 

You have friction and hydrodynamic losses in the drivetrain, which is for the most part is a static loss (ie a fixed amount, not power related) , but you also have some losses which are Power related from the side loads on helical gear teeth and bearings. You also have Rolling resistance from tyres which is increased with speed, not with power.

 

So its not really possible to give either a fixed or percentage power loss.

 

Some Dyno's use a simple stab-in-the-dark percentage loss calculation, and some attempt to measure the losses in deceleration as the car is coasted to a stop on the dyno. Which again is not accurate because the drivetrain is not under load in this situation and friction is increased with load. The Flywheel figure represented on a Dynosheet is a vaguely calculated guesstimate.

 

You also have to take into account that losses on a dyno differ between cars depending on factors such as Drivetrain component condition, oil condition and viscosity, tyre pressures and drivetrain modifications.

Edited August 15, 200916 yr by Yowser

Percentage figures are often quoted for Flywheel to Wheel power as a very rough estimate, but its not really fair to use them, since you have both static and proportional power losses.

 

Static losses are a fixed loss that is not affected by vehicle power and proportional losses are those that increase dependent on the load (power) put on them.

 

A 200hp car that loses 40hp (20%) would not lose 80hp (20%) if its power was increased to 400hp, but then neither would it lose just 40hp still. A more accurate figure would be somewhere inbetween.

 

You have friction and hydrodynamic losses in the drivetrain, which is for the most part is a static loss (ie a fixed amount, not power related) , but you also have some losses which are Power related from the side loads on helical gear teeth and bearings. You also have Rolling resistance from tyres which is increased with speed, not with power.

 

So its not really possible to give either a fixed or percentage power loss.

 

Some Dyno's use a simple stab-in-the-dark percentage loss calculation, and some attempt to measure the losses in deceleration as the car is coasted to a stop on the dyno. Which again is not accurate because the drivetrain is not under load in this situation and friction is increased with load. The Flywheel figure represented on a Dynosheet is a vaguely calculated guesstimate.

 

You also have to take into account that losses on a dyno differ between cars depending on factors such as Drivetrain component condition, oil condition and viscosity, tyre pressures and drivetrain modifications.

 

I follow you and the arguments, there is no fasit on this.

If an 300ZX engine with 283 original BHP looses say 15% = 42 BHP, a 800 BHP would not loose 15% = 120 BHP, but perhaps 10% = 80 BHP.

 

Does that seem reasonable, you think, or is 10% perhaps too high?

(assume that all parameters like tyres etc are the same)

I follow you and the arguments, there is no fasit on this.

If an 300ZX engine with 283 original BHP looses say 15% = 42 BHP, a 800 BHP would not loose 15% = 120 BHP, but perhaps 10% = 80 BHP.

 

Does that seem reasonable, you think, or is 10% perhaps too high?

(assume that all parameters like tyres etc are the same)

 

yes, as Power increases the percentage loss decreases. It cant really be calculated as the Friction, Inertia viscous losses are not linear.

 

As a guess, 10% does not seem unreasonable with increased power.

 

But then again, at some point (ie. power level) the proportional losses could start having a bigger affect than the static losses - While a theoritical percentage decrease may apply when increasing from say 300 to 500hp, when instead Power is increased as high as something like 800hp, losses from Friction and subsequently viscous (heat) may have a bigger affect than they would at lower power increases. This is why its not possible to use any set fixed or percentage loss.

Edited August 15, 200916 yr by Yowser

Hope I am not speaking out of turn for Jaffa but the car isn't finished yet, a few more tweaks and then he will be able to turn the boost up.

Hope I am not speaking out of turn for Jaffa but the car isn't finished yet, a few more tweaks and then he will be able to turn the boost up.

 

Since you have started out for Jaffa, could you go a little further about his project, what has been done, power, etc.........:dance:

Since you have started out for Jaffa, could you go a little further about his project, what has been done, power, etc.........:dance:

 

http://www.300zx.co.uk/forums/showthread.php?t=126994&page=2

http://www.300zx.co.uk/forums/showthread.php?t=126994&page=2

 

You need to come up with some numbers too...............:hyper:

You need to come up with some numbers too...............:hyper:

 

They are there on the dyno sheet :)

The transmission losses are rpm related and like others said not linear. They rise rapidly with rpm rotational inertia etc so an engine that makes its power at lower rpm would see less transmission losses on the RR than a car with the same transmission but peak power coming 2000rpm higher.

 

I was amazed at the transmission losses of some 4 wheel drive cars like Evo's and Subarus. Im sure some big power ones were measuring 100bhp of transmission losses according to the RR on the deceleration measuring phase.