big, Big, BIG NUMBERS!
03-01-2005, 02:27 PM
#46
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2.4 Liter Ford RS 200.. 4, yes, FOUR Cylinder.... 1000+ Hp turbocharged, intercooled.. Going to Pikes Peak..
It's about tuning, not only engine displacement..
Some supercharged big blocks churn out 2,500 + hp and are driven on the street..
I think BMW had a 2.0 liter 4 cylinder with 1,500 hp...
Then there is that 968 Turbo with 520 RWHP or 612 CHP on 100 Octane at 1.5 Bar.. Now being that a 968 is 50% of a 928, why can't a properly prepped 928 make 1200+ hp...?
Hmmmmmmm, $.02
It's about tuning, not only engine displacement..
Some supercharged big blocks churn out 2,500 + hp and are driven on the street..
I think BMW had a 2.0 liter 4 cylinder with 1,500 hp...
Then there is that 968 Turbo with 520 RWHP or 612 CHP on 100 Octane at 1.5 Bar.. Now being that a 968 is 50% of a 928, why can't a properly prepped 928 make 1200+ hp...?
Hmmmmmmm, $.02
03-01-2005, 03:03 PM
#47
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If you build the block and the internals on any motor *very* strong, you can boost the hell out of it, and get some insane numbers... If your crank, rods, pistons, and block, can take the strain, you can run boost, avgas, nitrous, etc, etc...
If you want big numbers, just turn up the boost.
The question is what parts in the 928 engine will fail under extreme pressures.
If you go that high, you may need an o-ring head gasket, or heads welded to the block.
Regardless, if you build something with that kind of power,
it will not last for a long time... Even racecars get rebuilds
quite often.
If you want big numbers, just turn up the boost.
The question is what parts in the 928 engine will fail under extreme pressures.
If you go that high, you may need an o-ring head gasket, or heads welded to the block.
Regardless, if you build something with that kind of power,
it will not last for a long time... Even racecars get rebuilds
quite often.
03-01-2005, 05:56 PM
#48
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Bob Norwood let me see his 968 rwhp dyno sheets for some of his engines, as well as the engines ...many over 1100 rwhp!
Keep in mind, that is for a 3l engine!
Marc
Keep in mind, that is for a 3l engine!
Marc
03-01-2005, 06:03 PM
#49
The Lady's Man
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Bob Norwood...thats a name I havent heard in a while. Bob is one of those builders that can squeeze the horsepower out of any motor but you can bet it isnt going to last. I cant recall how many times he showed up to an event and broke down immediately or couldnt get the car to run. One hell of a funny guy though. He does some crazy sh--!
03-02-2005, 05:15 PM
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yiikes! 170 on a public road? holy cow! hate to be the boogie man, but if chp ever saw anyone planning to do a run like that, it'd be conspirasy - a felony! add that to getting caught in the act, and you'd be in a cell next to charlie manson - not bad compared to avoiding gang rape in the showers!
don't mean to preach (ironic, given my colorful driving record), but why not just pull a permit w/chp and do an event for a couple of hrs? get the whole road to yourself, and let'er rip!! was thinking about doing that for a "welcome home" party for my shark when done, or a track day at willow... gotta be cheaper than the legal fees and mess if you rear end a soccer mom in a mini van full of kids when she changes lanes in front of you at warp speed... just a thought, hate to see you guys on the news...
that said, theres a great stretch east of mojave on 395 just before jawbone cyn - big lanes, divided hwy, no exits, not much traffic... occasional smokies, so radar gear is useful if you "accidently" find yourself going "a little" faster than you should....
don't mean to preach (ironic, given my colorful driving record), but why not just pull a permit w/chp and do an event for a couple of hrs? get the whole road to yourself, and let'er rip!! was thinking about doing that for a "welcome home" party for my shark when done, or a track day at willow... gotta be cheaper than the legal fees and mess if you rear end a soccer mom in a mini van full of kids when she changes lanes in front of you at warp speed... just a thought, hate to see you guys on the news...
that said, theres a great stretch east of mojave on 395 just before jawbone cyn - big lanes, divided hwy, no exits, not much traffic... occasional smokies, so radar gear is useful if you "accidently" find yourself going "a little" faster than you should....
03-02-2005, 05:24 PM
#51
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I wish people would not be so vocal about 395. No need to draw attention to a good thing. Naw, you don't want to go there. Cops everywhere. Don't tell anyone about it. No fun. Stay home and read. Save gas. I'll go there and check it out for you instead....about every day if I could.
03-02-2005, 07:57 PM
#54
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What I meant was to not publicize it; like sea birds, bears love to find a fertile feeding ground. No good telling everyone. I have been known to travel 395 in Eastern California but would never tell anyone about it. Now Eastern Oregon is also a "stimulating" trip, and 395 sounds "appetizing" to me. I have been on 84 but was only sightseeing as I always do minding my own business poking along about 120 or so. Nice roads. Snored alot.
03-02-2005, 09:07 PM
#55
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But officer, I coudn't help myself. The car just kept saying Steve Steve Steve, go faster, faster, faster, faster!!!!!!!!!!!!!! It was like I was on some kind of drug and I coudn't control myself. I know, I'll use the Twinky defense. That's it, it possessed me, it just took over, I wasn't in control anymore. There ought to be a law about cars like this!! People could get hurt, and there's not even a woman involved. That's it, I'm calling my state representative. You haven't heard the last of me!
Steve
Steve
03-02-2005, 11:01 PM
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Folks seem to forget that this is not your "average" car. Not only can it reach speeds beyond the "average" car, It STOPS rather quickly...much better than the "average" car. I think that is what it was designed to do, with all things considered...
I also don't think anyone here is going to be tipping these speeds on a regular basis, not even in light traffic. I would suspect that most folks here who have hit good speeds, did it when NO ONE (as far as they knew) was around. Things like this are usually done on remote highways, not on inner city highways between exits.
Thats MY story and I'm st t t t ickin to it!
I also don't think anyone here is going to be tipping these speeds on a regular basis, not even in light traffic. I would suspect that most folks here who have hit good speeds, did it when NO ONE (as far as they knew) was around. Things like this are usually done on remote highways, not on inner city highways between exits.
Thats MY story and I'm st t t t ickin to it!
03-02-2005, 11:30 PM
#58
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Originally Posted by Ron_H
I wish people would not be so vocal about 395. No need to draw attention to a good thing. Naw, you don't want to go there. Cops everywhere. Don't tell anyone about it. No fun. Stay home and read. Save gas. I'll go there and check it out for you instead....about every day if I could.
03-03-2005, 02:11 AM
#59
I asked an engineer friend of mine to work out the following problem for me, he is a member/user of this forum. Here was the answer.
Greg Gray wrote:
> Hi Glen please find attached the docs we discussed,
> also could you work out the power required at the .34
> cd to achieve 320 kph and 350 kph?
>
> Cheers Greg
Greg,
For a Cd of 0.34, frontal area of 1.98m2, 15 degrees C and atmospheric
pressure of 1013.25mb (the "standard" atmospheric conditions at sea
level), you would require 290kW at 320 km/h and 379kW at 350km/h to
overcome aerodynamic drag only.
A dyno measures the excess power at the rear wheels, so the measures
power is nett of the transmission losses and the rolling resistance of
the rear tyres. You, however, need to add an estimate for the rolling
resistance of the front tyres to determine what rear wheel power you
need to mesure on the dyno to achieve your desired speed.
The front tyres would absorb approximately 14kW at 320km/h and 15kW at
350km/h, so you would need to see 304kW and 394kW respectively on the
dyno to reach these speeds (obviously at the rpm the car will be doing
when it gets there!).
The dyno will be corrected to a given temperature and pressure. The
pressure almost certainly will be 1013.25mb, but the corrected
temperature may be 20 degrees C. The drag at 20C will about 1.7% less
than that at 15C because the air is less dense.
Cheers,
Glenn
Greg Gray wrote:
> Hi Glen please find attached the docs we discussed,
> also could you work out the power required at the .34
> cd to achieve 320 kph and 350 kph?
>
> Cheers Greg
Greg,
For a Cd of 0.34, frontal area of 1.98m2, 15 degrees C and atmospheric
pressure of 1013.25mb (the "standard" atmospheric conditions at sea
level), you would require 290kW at 320 km/h and 379kW at 350km/h to
overcome aerodynamic drag only.
A dyno measures the excess power at the rear wheels, so the measures
power is nett of the transmission losses and the rolling resistance of
the rear tyres. You, however, need to add an estimate for the rolling
resistance of the front tyres to determine what rear wheel power you
need to mesure on the dyno to achieve your desired speed.
The front tyres would absorb approximately 14kW at 320km/h and 15kW at
350km/h, so you would need to see 304kW and 394kW respectively on the
dyno to reach these speeds (obviously at the rpm the car will be doing
when it gets there!).
The dyno will be corrected to a given temperature and pressure. The
pressure almost certainly will be 1013.25mb, but the corrected
temperature may be 20 degrees C. The drag at 20C will about 1.7% less
than that at 15C because the air is less dense.
Cheers,
Glenn