How much power is enough?
Discussion
phazed said:
I am not sure what the answer to the question is at the moment.
My car has been sat in the garage for a month unused.
Too busy and rubbish weather has curtailed fun but I am keen for a run out tomorrow.
After the last 10 days wafting in an oil burner Vel Satis it will come as a shock I'm sure, bring it on!
I have never left the car for so long before but maybe that's a sign of the times, get older and work more.
Next year will be different, so I hope anyhow.
Hope I don't bin it
We feel your pain and empathize with your fears Peter, because we all experience the same from time to time!My car has been sat in the garage for a month unused.
Too busy and rubbish weather has curtailed fun but I am keen for a run out tomorrow.
After the last 10 days wafting in an oil burner Vel Satis it will come as a shock I'm sure, bring it on!
I have never left the car for so long before but maybe that's a sign of the times, get older and work more.
Next year will be different, so I hope anyhow.
Hope I don't bin it
I want to pilot 'Ol Gasbag' so bad, even if it's just one last time before leaving these shores for a while.
QBee said:
Drove mine yesterday.
Turned a few geriatric heads at Homebase's car park.
Much tutting.
Look Gerald, there's one of them boy racers. Turned a few geriatric heads at Homebase's car park.
Much tutting.
Yes dear, I'm sure the young man is just having some fun.
Well he needs to grow up driving around like a lunatic. And all that noise too.
Daphne, come on, its Thursday so I need to go and get the Peugeot filled up today.
Look at him. The car park's empty and he's parked right next to us. He better not damage our car.
Well, let's wait till he gets out.
That might take a while. What's an old man like him doing driving a noisy sports car like that. He just looks ridiculous. Tut tut.
Very good.......except it was a Focus, out to buy a Ficus (horticultural play on worms there), and I was the one who parked away from other cars for precisely that reason.
Gerald was sat in the car while Daphne was sent into the shop for the plant and several paving slabs. These northerners know the meaning of "woman's work".
I saw him staring and my inner 19 year old (I am over 60) was sooooo tempted to power slide my way out of the car park. It was just the risk of looking an utter James May if I got it wrong that stopped me.......
Pupp said:
Revs are not generally a problem to the Rover block (piston speeds and rod loadings etc are actually pretty low if you do the calcs), a decently balanced 4.6 with its better piston design especially will easily handle being buzzed from a mechanical point of view although the valve gear will definitely need bolstering (outriggers and roller rockers a good bet).
The difficulties actually come from running a cam with the right grind to enable high rpm breathing assuming the heads can support that (look at the torque drop off from 5krpm or less on most dyno traces you see posted to see where even 'sports' cammed cars typically live) - this needs loads of overlap, which will impact low speed running and manners (chronically with a single plenum). The charge robbing and cross-contamination that causes this will also make for a dirty engine internally, which can be dispiriting.
That apart, a screamer coming on cam with a bit of boost behind it is pretty addictive
get your point and youre right. problem are the follow up costs of a wilder cam. would be then stage 4 heads The difficulties actually come from running a cam with the right grind to enable high rpm breathing assuming the heads can support that (look at the torque drop off from 5krpm or less on most dyno traces you see posted to see where even 'sports' cammed cars typically live) - this needs loads of overlap, which will impact low speed running and manners (chronically with a single plenum). The charge robbing and cross-contamination that causes this will also make for a dirty engine internally, which can be dispiriting.
That apart, a screamer coming on cam with a bit of boost behind it is pretty addictive
with bigger valves, roller rockers and all sort of things to make it stable around 6K rpm. the gain i is maybe
another 30hp for serious cash spent so there is some sort of bang for the buck but going the blower route gains
are better but would be on borrowed time for the engine not built for it´s purpose. currently 47K miles on the actual
JE cam with unknown duration and lift and replacement will be needed in the future. Anybody has experience with
the following two cams ?
http://www.kentcams.com/product-details/208/Camsha...
http://www.kentcams.com/product-details/210/Camsha...
If you talk to regular grass routes drag racers the number 750 comes up regularly. In a road car with drag radials and a few suspension tweaks 750bhp can be utilized to run amazing times on the drag strip yet can still be used on the road. Having power above this would require serious chassis modifications.
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