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O M F G ! ! ! ! !

 
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topcatcustom
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PostPosted: Sat Jun 12, 2010 10:55 am    Post subject: O M F G ! ! ! ! ! Reply with quote

Car went on the rollers today, the guy couldn't find anything else to change that I hadn't already done, mixture and timing were pretty much spot on Cool

Made 368BHP at the crank and 330BHP at the wheels!!! - oh, at 7k Shocked Laughing Torque was 276ftlb

So I was amazed! I was genuinely expecting 100bhp less, the graph shows NO curve whatsoever, power is just a straight line all they way up! Best torque is between approx 4&6k so I'll never have to use all the revs, just as well as it is a stock bottom end so wont see that high rpm when I'm driving it!

Here's the chart:

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mgbv8
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1975 MG MGB GT V8

PostPosted: Sat Jun 12, 2010 2:38 pm    Post subject: Reply with quote

Thats bloody brilliant Tom Cool Cool
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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kiwicar
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PostPosted: Sat Jun 12, 2010 6:55 pm    Post subject: Reply with quote

That is one serious power curve (or as you point out straight line) to get it that straight you have built a very well balanced and matched set of parts and they produce very good power. What boost are you running? 8psi? if so then the base build without the blower must be worth over 235 ish which is a hell of allot for a rover in road spec. Well done!
Best regards
Mike
PS now let us see what you can do with a big block Very Happy
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Ian Anderson
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PostPosted: Sat Jun 12, 2010 9:18 pm    Post subject: Reply with quote

What capacity Rover is under the blower?


Very nice figures

Ian
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topcatcustom
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PostPosted: Sun Jun 13, 2010 2:41 pm    Post subject: Reply with quote

It is a 4l Ian, and Mike it is running about 7psi boost- tbh I dont really look at the boost gauge when pedal is to the metal- too busy looking ahead!
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JJMclure
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1989 Vauxhall Carlton

PostPosted: Mon Jun 14, 2010 12:56 pm    Post subject: Reply with quote

Cool! Must be a good feeling to get more than you expected, Congrats!
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bigaldart
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PostPosted: Tue Jun 15, 2010 9:22 pm    Post subject: Reply with quote

hmmm, have to seriously consider going big bore in the dragster now, just that could get us to 500hp with the same boost we run now. Great job Tom the 11's are waiting.

Alan
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Rossco
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2016 Jaguar F Type

PostPosted: Tue Apr 26, 2011 4:22 pm    Post subject: Reply with quote

Dont want to spoil anything here but that curve is too straight.

According to that curve your engine was still continuing to make power at 7k when reason would have it that a Rover with all it's limitations should be well past it.

With a blower motor I'd be expecting to see a much flatter torque curve.

Also at 7psi you could expect a max of 45% more power than a N/A engine therefore you'd need to be pulling 253bhp in N/A form to hit the figures shown above.

I'd be asking a few questions of the people who did the power run before being quite so happy with the result

......of course I'm usually wrong Very Happy
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