miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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In the last week I ran the 1/4 mile and put my car on the rollers at a local RR day.
Best quarter time was 14.065 @ 101.92mph
Made 199.4 bhp @ fly, 147.9 @ wheels, with 142 lb ft of torque! I cant believe I lost over 50bhp through the transmittion but thats what I was told!
This is from my 1.6 16v on tb's....
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vibrio
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if your peak power is high up the rev range then yes you'll lose alot compared to a car that peaks at 5500rpm. you got a graph of your power run?
do you have the same sort of mods as Andy H?
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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He has much more aggressive cams and a solid top end, also steel rods and high comp pistons. Which I dont....
I have a 8k rev limit and peak power was made at 7339. Got a pic of the graph at home, its basically a 45 degree line right up to 7339 when it tails off. I wont lose 25% through transmission. I'd say its really about 180 @ fly.
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vibrio
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you'd be suprised. how much are you losing around 5500rpm. maybe 25hp.
also depends on the rollers as well.
[Edited on 27-10-2003 by vibrio]
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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The graph only shows @ fly figures.
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vibrio
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Registered: 28th Feb 01
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shame. what happens to power deliver after peak. does it sharply fall or is it a gradual loss
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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Its goes down as fast as it came up, then tails off completely when soft cut is hit.
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Ditch
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Registered: 29th Nov 02
Location: St Albans Drives: JDM Celica GT4 WRC
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bet thats fcukin hours of fun in a nova fella!
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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Its a laugh yeah, i never seem to think its as quick as it is, but im used to it I guess...
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ffls
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Registered: 29th May 02
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I think you're right Miles. I also loose 35 bhp with transmission losses at 7200rpm. So you should have 175 to 180 bhp, which is an excellent result
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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I'm more than happy with 175-180bhp, I'd be more than happy with whatever it put out to be honest, after getting a 14.0 I know it goes well enough
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Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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Miles - sounds about right - around 180bhp flywheel. I had exactly 180bhp when I had gentler cams in, 8k limit and normal compression ratio (before engine rebuild). Made a peak torque figure of around 135lb/ft. 180bhp in a Nova sounds like lots of fun
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Tom
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Registered: 3rd Apr 02
Location: Wirral, Merseyside
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U got any pics of your nova miles? 14's is
Andy yours feeling quick with the new box mate? U haven't really mentioned it?
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vibrio
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quote: Originally posted by ffls
I think you're right Miles. I also loose 35 bhp with transmission losses at 7200rpm. So you should have 175 to 180 bhp, which is an excellent result
on the same rollers?
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ffls
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Registered: 29th May 02
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No my RR is Portugal, whereas Miles is in England
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vibrio
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Registered: 28th Feb 01
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then how can you compare
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Daimo B
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Registered: 20th Mar 00
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Good figures, good time, coming on to be a cracking motor WHats the full engine spec on it now?
PS, rad covers
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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Copied from what I put on another forum the other day.
Spec is:
Rebuilt in shed by ChrisB with monkey jobs done by me!
Standard F15 without lsd etc
C16XE
ChrisB ported head
Std pocketed pistons
ChrisB deseemed rods
balanced bottom end
lightened flywheel
standard valves, springs etc
verniers
piper 285 fast road cams
ARP rod bolts
ChrisB matched inlet manifold
Cream injectors
DTA management
Jenvey 40mm parallel tb's
90mm trumpets
motorsport fuel pump
black top fpr
8k rev limit
I've had a cover made, will have pics of it fitted soon.
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Daimo B
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Registered: 20th Mar 00
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U2U me a price also
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Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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quote: Originally posted by Tom D
Andy yours feeling quick with the new box mate? U haven't really mentioned it?
One word really - mental
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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