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Bit of a result ......

 
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seight
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Joined: 20 Nov 2006
Posts: 391
Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Sat Mar 28, 2015 2:08 pm    Post subject: Bit of a result ...... Reply with quote

..... it's been a long time coming but I'm one step closer to getting on the road - I trailered my Westfield to a rolling road yesterday.

314.8 BHP @6100rpm
320 FT/LB @4500rpm

from my RV8 4.2ltr (+.020), MC1 cam, 10.2:1 CR, Stage III heads, ported hotwire manifolds, ACT carbon plenum, 4.6 throttle body, MegaSquirt 2.

Needless to say I am well chuffed from an engine I built with limited knowledge. So a big thanks to everyone who answered any of my dumb questions.

Only pain was my lambda sensor gave up Sad so it's been mapped without it.

IVA test next ! IT's a '92 block so I with 90ppm HC and 1 ish %CO it should be fine Smile

Mike SmileSmileSmile


Last edited by seight on Sat Mar 28, 2015 6:34 pm; edited 1 time in total
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JJMclure
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Joined: 21 Jul 2008
Posts: 264
Location: wotford 'earts

1989 Vauxhall Carlton

PostPosted: Sat Mar 28, 2015 5:17 pm    Post subject: Reply with quote

Yep your emissions should be good - good luck!
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Coops
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Joined: 17 Nov 2006
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Location: Newbury, Berks

1986 Ford Capri

PostPosted: Sat Mar 28, 2015 10:01 pm    Post subject: Reply with quote

where did you go mate?
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MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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seight
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Joined: 20 Nov 2006
Posts: 391
Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Sun Mar 29, 2015 9:30 am    Post subject: Reply with quote

Hi Coops,
I took it to http://www.dyno-tech.co.uk which isn't too far from me.
I'll get the map and plots uploaded later if anyone's interested.
Mike Smile
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Blown v8
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Location: Kent


PostPosted: Sun Mar 29, 2015 2:12 pm    Post subject: Reply with quote

Yep,post them up Very Happy
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seight
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Joined: 20 Nov 2006
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Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Sun Mar 29, 2015 3:47 pm    Post subject: Reply with quote





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Cobratone
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Joined: 08 Jan 2009
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Location: East Mids


PostPosted: Tue Mar 31, 2015 3:27 pm    Post subject: Reply with quote

Quick question, why do your fuel and ignition load percentages not start at zero?
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r2d2hp
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Joined: 17 Nov 2006
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Location: Gt Missenden


PostPosted: Tue Mar 31, 2015 5:09 pm    Post subject: Reply with quote

I have a question as well. Why did they use 3rd gear as I am led to believe that would have a positive effect on the results according to Dave Walker.

He has always done my runs in 4th eg 1-1
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seight
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Joined: 20 Nov 2006
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Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Tue Mar 31, 2015 7:10 pm    Post subject: Reply with quote

r2d2hp wrote:
I have a question as well. Why did they use 3rd gear as I am led to believe that would have a positive effect on the results according to Dave Walker.

He has always done my runs in 4th eg 1-1


That's interesting. Someone would have to explain the physics to me! 1:1 in the gearbox then you still have the diff ratio and tyre size determining your road speed.

A quick bit of googling seems to suggest there's all sorts of opinions. One guy on pistonheads seemed to get better figures in 4th.

Confused

Mike
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r2d2hp
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PostPosted: Tue Mar 31, 2015 7:26 pm    Post subject: Reply with quote

Dave Walkers site is quite informative and based on his experience over the past 30 years http://www.emeraldm3d.com/rolling-road.

Section "BHP at your wheels" discusses why BHP goes up when a lower gear is used
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seight
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Joined: 20 Nov 2006
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Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Tue Mar 31, 2015 7:26 pm    Post subject: Reply with quote

Cobratone wrote:
Quick question, why do your fuel and ignition load percentages not start at zero?


I have no idea Embarassed

I'm using speed density for both fuel and ignition if that helps. Confused

Mike
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Cobratone
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Joined: 08 Jan 2009
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Location: East Mids


PostPosted: Tue Mar 31, 2015 7:35 pm    Post subject: Reply with quote

seight wrote:
Cobratone wrote:
Quick question, why do your fuel and ignition load percentages not start at zero?


I have no idea Embarassed

I'm using speed density for both fuel and ignition if that helps. Confused

Mike


I use speed density too and my tables start at zero which is where the car idles at as there is no load on the engine. All my cruise and the majority of my driving is done with a load less than 15% so not sure why yours would start there, unless I have it wrong??? Anyone else got an opinion??

*addition* I'm actually running AlphaN, not speed density which explains why I was confused. Sorry Embarassed
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Last edited by Cobratone on Tue Mar 31, 2015 7:56 pm; edited 1 time in total
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seight
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Joined: 20 Nov 2006
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Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Tue Mar 31, 2015 7:51 pm    Post subject: Reply with quote

I dunno Tone.
My understanding was that speed density is about manifold air pressure etc and even at idle you'll have something. If you use TPS position then you would have a zero. But I may be talking carp.
Mike
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Cobratone
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PostPosted: Tue Mar 31, 2015 7:54 pm    Post subject: Reply with quote

seight wrote:
I dunno Tone.
My understanding was that speed density is about manifold air pressure etc and even at idle you'll have something. If you use TPS position then you would have a zero. But I may be talking carp.
Mike


That explains everything Mike, I'm talking out my arse Embarassed I run AlphaN (TPS) not speed density! My mistake, sorry for the confusion Wink
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seight
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Joined: 20 Nov 2006
Posts: 391
Location: Ashbourne, Derbyshire

2007 Westfield Seight

PostPosted: Tue Mar 31, 2015 8:28 pm    Post subject: Reply with quote

r2d2hp wrote:
Dave Walkers site is quite informative and based on his experience over the past 30 years http://www.emeraldm3d.com/rolling-road.

Section "BHP at your wheels" discusses why BHP goes up when a lower gear is used


Interesting read but it also suggests losses are greater at higher speeds so although you get a lower wheel bhp you add on more for transmission losses in order to guesstimate flywheel bhp.

If you do the run in a lower gear and lower speed you add less on.

I'm going to spend hours reading this stuff now you've started Laughing Laughing

Mike
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