rearwheel to flywheel hp Options

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hq ss		#1 Posted : Monday, 19 March 2007 8:43:46 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		Can anyone comfirm or deny a formula I have for converting Flywheel HP to Rearwheel HP x.81 and Rearwheel HP to Flywheel HP x1.23.I have been told this is correct by some people and that it can not be worked out correctly because there are to many variables by others. Edited by user Monday, 19 March 2007 9:03:33 AM(UTC)  | Reason: Not specified
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Guest		#2 Posted : Monday, 19 March 2007 8:52:35 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		If I remember correctly as an estimate on a manual transmission you are looking at around 15% loss and on an automatic transmission you are looking at 20% loss. i.e: Manual - Flywheel HP to Rearwheel HP x.85 Automatic - Flywheel HP to Rearwhe

hq ss		#3 Posted : Monday, 19 March 2007 9:09:01 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		Thanks ReaperHR. On the net I have found a few differant views on this so I was curious to see how accurate it realy was.
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Guest		#4 Posted : Monday, 19 March 2007 9:40:22 AM(UTC)
Rank: Guest Groups: Guests Joined: 2/09/2015(UTC) Posts: 43,977 Was thanked: 5 time(s) in 5 post(s)		Yeah your calc looks fine to me, if it's a manual your dealing with then you're going on the side of caution. Knowing cars that's always a good idea.

peter_flane		#5 Posted : Tuesday, 20 March 2007 7:58:21 AM(UTC)
Rank: Veteran Reputation: Groups: Registered, Veteran Joined: 22/05/2005(UTC) Posts: 1,384		I can tell you for a fact that a 135hp rated engine came up with 101hp at the rear wheels through a manual on one car. I wouldn't bother with flywheel estimates. They don't mean anything at all. You can't use flywheel ratings for anything at all. Whee
		If it is old or rare - Cut it! http://www.ehlimo.com.au/
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hq ss		#6 Posted : Tuesday, 20 March 2007 10:14:22 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		Peter as I said before I was just curious on the conversions.The time slips told the story but I was always interested to see how much each extra 50 hp of N2O was actually giving us at the engine.100 hp of N20 gave us 118.26 mph in a 2700 lb Lc 4dr. 150
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peter_flane		#7 Posted : Wednesday, 21 March 2007 4:11:37 AM(UTC)
Rank: Veteran Reputation: Groups: Registered, Veteran Joined: 22/05/2005(UTC) Posts: 1,384		Ahh I see. That is some serious wheel power to fry those slicks. Well done
		If it is old or rare - Cut it! http://www.ehlimo.com.au/
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hq ss		#8 Posted : Wednesday, 21 March 2007 10:23:39 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		It was all just a bit of fun. A high spec 308 race motor went bang and I had a 308 that came out of another mates crashed vh sdn. The engine snapped both engine mounts of in the crash and bashed its way around the engine bay before the car stopped. So we
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shouldntastarted		#9 Posted : Wednesday, 21 March 2007 10:11:16 PM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 24/02/2007(UTC) Posts: 36		Nice stuff. I have always been wanting to do a similar thing with the old 253. As they are cheap and relatively disposable. I know it was in a race car but what tranny set-up didyou use(ie manual or auto) The mind is like a parachute! It works far bett
		The mind is like a parachute! It works far better when open!
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hq ss		#10 Posted : Thursday, 22 March 2007 8:07:30 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		The LC was in full street trim down to the lap sash belts.Trans was a rebuilt and high stalled trimatic and it ran a 9 inch diff.Early on at One street meet it ran a flat 13 sec pass on its road 185x13 tyres. With out the gas by the way. We never tried i
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shouldntastarted		#11 Posted : Thursday, 22 March 2007 11:14:35 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 24/02/2007(UTC) Posts: 36		Good work. Nothing short of stock looking and volitile too. :) The mind is like a parachute! It works far better when open!
		The mind is like a parachute! It works far better when open!
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hq ss		#12 Posted : Friday, 23 March 2007 9:31:18 AM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 26/08/2006(UTC) Posts: 671 Thanks: 1 times Was thanked: 1 time(s) in 1 post(s)		Thanks. Less yellow stickers when you dont stand out. A mat black LJ 4dr that a mate and I both owned copped 27 yellow stickers and three reds in a year and a half between us.You tend to get sick of the process after a while.
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