BUTLER

ooopse my bad, 750bhp lol!

Getting mixed up with a 900bhp skyline on the rollers! Crazy shit!

puddy

I remember wayne saying around 850 on the bdte,but how much did that

cost?

julian godfrey has just done jt's yb on race fuel and hit a"brick wall"

@858bhp,changed manifolds and all sorts to no avail.I think it was still

using rs 500 plenum and 8X greys set up,in to 800 bhp territory!

puddy

Anonymous

easily possible, just a case of wether or not anyone would bother due to how much it would cost and how it would drive, only way i would want it personally would be if it was nitrous and a medium sized turbo (ie GT40 or less + gas) so that you didnt suffer too much with lag and needing too many rpm.

I suspect it will happen soonish though, wether there is a point to it or not, just cause people like chasing numbers.

Anh

If that's the case, all 5 litre, 6 litre, 7.7 litre V engines from high performance luxury cars should be scraped in favour of 2 litre turbos.

"Jives, why aren't we moving?"

"Sorry, Sir, this new Mercedes doesn't let me drop to 1st gear to get on the boost."

cossiemen

thinking about it isn't the problem...

it's just how to make it happen ?

Anonymous

he means in terms of peak bhp capicity isnt an issue, but the more bhp/litre you want the laggier it gets

Stavros

TO PEAK POWER YOU FOOKIN THICK TWAT

richm

fook!! why can't they make the standard road ecotecs any good then??

GARETH T

i also think it would be easy,,,

you just gotta look at how hp is made up

i doute it would make much torque,, but that isnt the question

Anonymous

not make much torque?

even at 10Krpm you would need 525lbft of torque to make 1000bhp!

GARETH T

chip-3door,
good point

chiz

wat year were the YB and skyline engines developed??

Anonymous

What date do you want for the YB, the first released one to the public (85 IIRC) or when the block first started getting used as a pinto?

Either way, its a reasonable amount before the first skyline motors which were early 90s i think

Anh

Lower your voice, you need to learn a thing or two still...

Turbo chargers need to run at higher pressures to supply the same air flow as a larger capacity turbocharged engine, that equals either larger inlet air flow designs allied with lag, or higher compressor shaft speeds and inlet air acceleration. Not so simple to design and build.

Smaller engines deal with higher BMEPs per cylinder, raising chances of auto-ignition. So less ignition advance and lower compression ratios are needed, lowering efficiency.

So with the topic of power bands to the side, capacity is still an issue.

Stavros

Chip- RB**DE engines was first released to the public in a car in 1985 too, same as YBs

Anh- Feck off, point is, we are talking purely 100% power, nothing else in the slightest, and capacity has very very little effect on the maximum available power of an engine, if all other aspects are free
Your just nit-picking to look like a clever twat, you dont contribute fuck all to this site so I dont know why your here...

Anh

Uh, capacity does when consider you are running far high BMEPs per cylinder with small engines. Then there is flame speed vs revs and raft of other problems. You can't simply dismiss it just to make your statement appear truthfull.

You're not getting out of this one, you shot yourself on the foot with sweeping generalisations and condecending cod sh1t. If you can't accept educated scrutiny then you should keep schtum on things that are beyond your scope.

I'll happly discuss engines and cars politely with anyone, but I'll equally be happy to put the end to some bullcrap that is arrogantly whored out on this board or any board for that matter.

Ginge !

steve dont sit on the fence mate, tell him what ya really feeling

GARETH T

i think keith duckworth summed it up,, but i cant remember his exact quote

"theres only two things that restrict power of a turbo engine, heat and mechanical strength, volume has very little to do with it"

something like that anyway

Anh

Cosworth also said there was no future with electronic engine management...



The less capacity you have, the more problems you will face to get top end power. Duckworth's comment pretty much a contradiction if you look into it.

GARETH T

this is for me then

Stavros

rofl@condecending pot-kettle-black at the most unhelpful person on here

i elaborated to say "very very little effect if ALL other aspects barring capacity are free" which is bloody true, but still decides to argue
what you say above is true, hence why i elaborated before you even posted that, but i mean FFS we only talking about getting 1000bhp out of a YB here for gawds sake

Nit-Picking Step–by–Step
http://ohioline.osu.edu/b893/b893_13.html

Anonymous

As this thread is about YB engines i assume the capacity comments are too, ie a 2.0 compared to a 2.2

Peak power and amount of boost used will be much of a muchness in both engines, but the 2.2 will be a slightly higher CR

The amount of boost needed isnt so much a factor of the bottom end, more of the flow potential of the head, as the vaxuum produced by 2 or 2.2 litres isnt enough of a difference to make much odds when there is 50lbs of boost forcing its way in.

It will have an effect, but not much to peak power, far more to where the turbo spools etc

Anh

blah blah blah blah blah

it's all useless rambling from someone who talks more than listen

DazC

iTrader: (1)

Anh

Relate fuel & air mass required to make the torque @ the RPMs to make 1000 bhp. The capacity will dictate cylinder dimensions, and will imply higher levels of energy confined in those limited dimensions. Correlate higher pressures with higher levels of heat, then there is all that heat transfering to the walls, which then raises combustion chamber temps of the next cycle.

It's a scary chain of events to think about, that's why alot needs to be considered when making huge power from limited capacity.

Stavros

ooooh, defensive/childish as theres no reply as you know what im/we saying is bloody right.

You NOT wrong, what you are doing is pathetic nit picking which dont even have a real point as id reply'd with that slightly more elaborate explanation before you posted what you did...

Chips saying it, gareths said it, ive said it, and gawd knows how many millions of people have said it in the past, your NOT wrong about it having an effect, but for all intents and purposes it has no substantial effect to someone building a 1000bhp YB or any remotley similar engine.

Of all the trade-offs, capacity has the least effect to overall power a turbocharged car makes.

Infact lowering the capacity by shortening the stroke may even be an advantage as then you might have more revs to play with to produce the power.

Anonymous

Anh, you have missed the point really mate, those pressure are dictated by unswept volumes not swept.

If you have 10 litres of mixture after combustion in a cylinder, its only the timing and the amount of space above the piston crown that matters. not the amount below it.

Thats the whole point of lowering CR

a 7:1 2000cc motor can handle the same amount of pressure as an 8:1 2300cc motor (roughly)

cossiecrew

i think a cossie could deffo reach 1000bhp just a case of money

Ian M500COS

Mine already did it........ but it only lasted for 17 seconds!!!

Alps Pacino

So what power did you achieveIan@Racetek,

Anonymous

and what broke first Ian?

Ian M500COS

Alps Pacino

Probably about 1050bhp........... then leading onto Chips question...... the H-section rod went walkbout!!! Very interesting topic lads!!

GARETH T

his bank balance

Ian M500COS

LOL!!!!

Anonymous

Ouch, but that was messy then!

Im guessing they were pretty exotic rods too?

Thats the advatnage in stregth that an RB has, not the extra 600cc the extra 2 rods and pistons.

cossiecrew

was it ever put on rollers im not saying your not telling the truth but have you got proof as so many people say theres had this and that bhp

Ian M500COS

Cossie crew

Nah, Im just joking, it made 576bhp on the rollers but an issue meant the boost ran wild (datalogged at 52psi on a GT35) and blew it up. It felt like 1000bhp though!!

GARETH T

i think ian is taking the piss mate,,,,, he had some boost control problems,,,, like he never had any

GARETH T

doh im just too slow today

Ian M500COS

I think the only way to get over 850bhp is to weld the head to the block and have titanium conrods!

Anyway, isnt 858bhp enough? Or 600bhp for that matter?