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Is 300KW N/A at the fly possible? 

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 2:32 am 
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Thanks for the info.
I just started playing around with power to weight ratios and cost benefits over going to an OHC motor over the crossflow so was wondering what kind of power people were getting.
I have heard figures of 350-360HP quoted for the crossflow, (http://www.xfalcon.com/forum/showthread ... ssie+speed), so thought with a better head design & more modern motor a little extra 40 HP wouldnt be out of reach.
Thanks
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 4:24 pm 
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Blunny wrote:

I have heard figures of 350-360HP quoted for the crossflow, (http://www.xfalcon.com/forum/showthread ... ssie+speed), so thought with a better head design & more modern motor a little extra 40 HP wouldnt be out of reach.
Thanks


So we are talking horses not killerwasps, very different story then.

You may need a $10,000 crank though. (sorry thats not helpful)

even still, it would be a pretty stressed motor with a short life span.

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 4:28 pm 
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dc_todd wrote:

You may need a $10,000 crank though. (sorry thats not helpful)


Well thats a given!

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 6:44 pm 
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I am yet to see a crossflow make 350hp at the wheels N/A. So these are flywheel measurements I'm assuming.

For a start you are going to need some rather exotic head work in order for the engine to breathe the air required at those sorts of power levels.

posting.php?mode=reply&f=1&t=87422

I've started on this masterpiece of a thread but progress has been slow for the time being. I am looking at building a budget flowbench to get things happening again and approached the uni for some pointers and they don't want to hear about it. They believe that CFD (Computational Fluid Dynamics) software is the way of the future and Flowbenches are basically antique benches.
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 7:07 pm 
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I know a BF NA XR6 with 230rwkw.
Runs on E85. Pretty quick car but ofcourse $$$$ have been spent.

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 7:16 pm 
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I've seen a few hemi 6's with 327-350 rwhp that are still very streetable still..What's the average power (rwkw) out of the ohc engine...

phill
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 9:24 pm 
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taxi 5L wrote:
I've seen a few hemi 6's with 327-350 rwhp that are still very streetable still..What's the average power (rwkw) out of the ohc engine...

phill



most people are between 190 and 240RWHP but these people are running stock ecu's and are more streetable then a stock hemi ever was, let alone a 350rwhp one.


there are three things that IMO have been stopping people from making more.

1: this strange obsession with wanting to run the stock ECU.
2: the size of peoples wallets
3: lack of testicular fortitude.

the people that suffer from reason 2 don't suffer from reason 3.
the people that suffer from reason 3 also suffer from reason 1

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 11:35 pm 
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no it is not possible, thats around 400 flywheel hp.
i believe if you get a 4 barrel carby manifold from aussie speed and run a 650 you would get up to 250-260 bhp with the right cam and headwork, with a manual box.

Last edited by milo 302 on Thu Feb 04, 2010 11:59 pm, edited 2 times in total.

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Wed Feb 03, 2010 11:56 pm 
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There was a 265 hemi pacer that won the 6cyl N/A class at the nats for a few years in a row and it only made 250rwhp iirc.

Stock ECU stems from people being tight a***. Same as the hobbs pressure switch and extra injectors in the early days of the VL turbo. Its also a legal requirement nowdays as well but that still doesn't stop people from doing a good job of hiiding their aftermarket ecu's.

Testicular fortitude and money go hand in hand. the rich guys are always the ones with balls who either spend big, or spend a little less and aren't bothered by regular mechanical breakages.

From a purely mechanical perspective I still think our heads need some serious work (e.g. down drafting) to make that sort of power.
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 12:02 am 
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250 bhp = 185kw at the fly. Thats pretty achievable! It would only be around 150rwkw!

 

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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 6:37 pm 
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xcabbi wrote:
There was a 265 hemi pacer that won the 6cyl N/A class at the nats for a few years in a row and it only made 250rwhp iirc.


That would of been TNT-265 and would of been 17-18 nats.There was a green centura (xxx-265) that tony luci owns,it put down 350rwhp with 4spd and borgy then come back the year after and put down 351rwhp with powerglide and 9'' and i think it runs 11's down the strip...

phill
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 6:56 pm 
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krisisdog wrote:
250 bhp = 185kw at the fly. Thats pretty achievable! It would only be around 150rwkw!


250 bhp is at the tyres not the flywheel, brake horsepower isnt at ther motor only foreign people say that(top gear) it is equivalent to 186.5 kw at the tyres.
And yes the hemi 6 makes 350hp at the tyres(coz its a hemi :D )
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 6:57 pm 
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Power: 137 rwkw

milo 302 wrote:
no it is not possible, thats around 400 flywheel hp.


yep its possible and there got the numbers to prove it but the 350rwhp hemi is a 278 not 265 with alloy head,cain 4bbl,solid cam and 750dp demon on it :) ...

phill
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 7:06 pm 
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taxi 5L wrote:
milo 302 wrote:
no it is not possible, thats around 400 flywheel hp.


yep its possible and there got the numbers to prove it but the 350rwhp hemi is a 278 not 265 with alloy head,cain 4bbl,solid cam and 750dp demon on it :) ...

phill


It is not possible to make 400 flywheel hp on a 4.0 ford motor, n/a. race fuel or not :D
Who is "there" because id like to see those 400hp 4.0 numbers :shock: and so would everyone else.
Im not disputing the fact of making 400 +hp with a hemi 6 coz its not exactly rocket science.
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 Post subject: Re: Is 300KW N/A at the fly possible?
Posted: Thu Feb 04, 2010 7:20 pm 
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taxi 5L wrote:
yep its possible and there got the numbers to prove it but the 350rwhp hemi is a 278 not 265 with alloy head,cain 4bbl,solid cam and 750dp demon on it :) ...

phill


It is not possible to make 400 flywheel hp on a 4.0 ford motor, n/a. race fuel or not :D
Who is "there" because id like to see those 400hp 4.0 numbers :shock: and so would everyone else.
Im not disputing the fact of making 400 +hp with a hemi 6 coz its not exactly rocket science.[/quote]

where in my reply did i mention na 4.0 ford motor ??? i thought you said 400 fly wheel isnt possible from hemi...

phill
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