20 replies to this topic

[lazarazou]

[Ali_G]

BHP = Brake Horse power.

A measure of the engines power out put.

Measured when the engine is going at peak Revolutions Per minute.

About 870 BHP.

Niall

[Arneal]

To clarify what Naill's said, typically the listed horsepower is the peak horsepower rather than the horsepower at peak RPM.

[Ali_G]

Most people acctually believe that Asia Tech have teh least powerful engine. Even with Minardi's old lump Asiatech's engine is supposed to be woeful.

Niall

[slipstream]

From what I have read in a number of Magazines the BMW has about 850 BHP and the Ferrari and the Ilmor-Mercedes has 830 to 840 BHP. I would like know the difference in BHP between the qualifying and race Engines ? Some people say that the BMW may have up 900 BHP for qualifying but I doubt that.

[nzkarit]

The engines in qual will have more power becasue they are tweak a lot more and only have to last 12 laps. Race engines are detuned so they will last the 300km. I doubt that they would be able to get an extra 50hp though.

[AdamLarnachJr]

I dont see any problem with getting an extra 50hp out of a qualifying engine. You can use lighter valves, retainers, locks, springs, rods with releifs, crankshafts with more drilled holes, hollowed camshafts, I see about 6.5kg of weight right there, less mass for the engine to rotate as well, heck you could even CNC material out from underneath the piston, shave off material from the head and block castings, there are so many endless things you can do to lighten the load, and create more power.

[nzkarit]

Shaving weight off static parts of the engine would decease weight allow more balast to be carried and hence a better COG.

Shaving weight off rotating parts of the engine would allow the engine to speed up and slow down faster becasue of less rotational interia. Plus the balast thing agian.

[AdamLarnachJr]

Yes but lighter engine components = less friction and mass the engine must rotate to cycle, meaning more useable power, this is the reasoning behind mag valves because its less components and mass for the engine to rotate, however engine weight is a different story with those godzilla solenoids.

[Melbourne Park]

You could have lower friction bearings on all the moving parts as well. Possably less cooling or even less oil for the engine G/Box. You could have a less durable gearbox as well. And higher revs as well. Less durable clutch. The list must go on; don't know to what extent they go though ...

Also higher fuel consumption has no penalties in the pole runs.

[jazzzz]

Originally posted by Ali_G
BHP = Brake Horse power.

A measure of the engines power out put.

Measured when the engine is going at peak Revolutions Per minute.

About 870 BHP.

Niall

It should be peak power (= peak torque X rpm).

[jazzzz]

Originally posted by jazzzz


It should be peak power (= peak torque X rpm).

Oops... correction

Power = Torque X rpm

Depending on the torque curve, but most engines develop their peak power at high rpm.

[Top Fuel F1]

HP is calculated, BHP is measured on the Dyno. See some info on them:
http://www.hyperdyno.com/what.htm
Rgds;

[leegle]

Just how much more material can they take from the pistons do you think Adam Larnach Jr? I would think that it is necessary to retain it all to contain the extreme pressure of compression and combustion. I can see lighter rods being a useful short life item as well as valves and so on but not the piston crowns.;)

[AdamLarnachJr]

Underneath, right where the wrist pins/shims and bearings go, there is generally a good amount of material in that area to keep the piston really secured to the connecting rod. You can reduce the amount of material, but still keep some reliabilty in there, also machining the skirts down to really thin, or just machine most of the material off and use a pre seated bore.

Excuse me, not to keep it connected, but to keep the part where the bearing goes connected, also areas to look for are the crankshaft counterweights, of course it would require a complete "re-balance" of the rotating assembly, you could further reduce the weight on the throws, possibly even machining holes in the connecting rods, sure its not going to last for a full race, but if you can find the right areas with the least amount of stress, you could make the engines last for about 20 laps. Carrillo and Oliver are really good at making things like that for race engines, though I doubt anybody in F1 uses them.

[Melbourne Park]

A position on the next row is worth heaps in F1. There's a great deal of difference in the pole engines from the top engines IMO.

[baddog]

given the difficulty of balancing an f1 car, I would think the qual engine would be as heavy as the race one to the nearest gram.. just tuned to higher max revs etc. this is speculative however

Shaun

[Melbourne Park]

Originally posted by baddog
given the difficulty of balancing an f1 car, I would think the qual engine would be as heavy as the race one to the nearest gram.. just tuned to higher max revs etc. this is speculative however

Shaun

good point, but then if the engine was lighter they could use some balast, which is better placed than the engine. There must be other areas they would trim some weight as well which would also effect balance.

I think lower friction bearings in the whole engine would increase power and still survive the few laps, bearing life should be a known.

Another obvious weight benefit would be the brakes which should be lighter and thinner for instance, it doesn't take much effort to put in a set of thin pads etc. Besides unsprung weight is a usefull saving.

All balanced by ballast IMO. Crazy not to concidering the stakes and the amount of resources they have ... further it often happens that a car's pole performance does not match race performance, which may substantiate what you are saying Shaun ...

[Alien]

I heard a guy from asiatech on PSN network say that their engine had 798 bhp, during the austrian GP....

[AD]

I was at an opening of a new shopping centre today in which the EJ-10 was displayed. The guy with the car works in their commercial department so I don't know if he'd be told the true bhp figures. However he said that the Honda was pumping out "very close to 800" bhp. He said that Jordan reckon BMW has 850 horses, while Ferrari would be pretty close to BMW as well.

[Ali_G]

AD: A little hard to believe that the Honda engine would be so much down on the BMW engine.

i supose he is only guessing aswell. he probabley wouldn't be left near any of that sort of info.

Niall