500 maximum engine revs
Discussion
I’ve had my 500 for around a year and have always changed gear at 5000rpm maximum, i thought I’d read somewhere there’s a rev limiter at around 5500 rpm.
I’ve only just looked in the manual to see max power is at 5600rpm! With an engine with decent torque and a long stroke is there much more to be had by taking it to 5600?
I’ve only just looked in the manual to see max power is at 5600rpm! With an engine with decent torque and a long stroke is there much more to be had by taking it to 5600?
I’m looking at doing an ECU upgrade and thought I would need to change the camshaft first, as the cars on 86k miles. Have spoken to power and V8 Dev to consider which cam. Then spoke to Joolz at Kits and Classics about the ECU change. His advice was to see if it still pulled when up towards 6k RPM, if so leave cam well alone.
So I took it to see and I don’t think I need to change my cam.
So I took it to see and I don’t think I need to change my cam.
spikep said:
I m looking at doing an ECU upgrade and thought I would need to change the camshaft first, as the cars on 86k miles. Have spoken to power and V8 Dev to consider which cam. Then spoke to Joolz at Kits and Classics about the ECU change. His advice was to see if it still pulled when up towards 6k RPM, if so leave cam well alone.
So I took it to see and I don t think I need to change my cam.
That’s interesting, mine has the 885 cam which I believe is the same if not very close to the standard 500 cam. So I took it to see and I don t think I need to change my cam.
Do you mind me asking what ECU you’re looking at? Mine has the standard 14CUX which I’m thinking about upgrading.
Overall, changing as suggested and supported by the power graph above which shows a levelling off of power coupled with the added engine vibrations that occur at high revs as it’s an old engine design etc overall changing no higher than about 5600 revs gains a load of torque as the engine starts to pull in the higher gear which actually pushes you through the air faster than just holding it until rev limiter which is usually round 5800 so if you to do timed 1/4 mile Drag runs I found on my rebuilt 450 Powers built and added MBE engine management system with a set rev limiter which of 5800 I was better changing up a gear around 5400-5500 revs and the recorded fastest time was when I changed at those slightly lower revs. When I revved it to the limiter the times where slower my almost 1/2 second
I eventually recorded a time of 12.60 as my fastest time.
That equates to 0-112 mph from a standing start to a 1/4 of a mile.
Really pretty quick for one of these. All rolling roaded and mapped and tuned at powers.
If I had ported heads, biggest valves and all matched to the ported inlet system more similar to 5.0 spec I’m sure it would get closer to 12 seconds dead.
Many of the old boys brigade who regularly tracked or just had fun on circuits and drag strips with these cars 10 odd years ago many recorded around 12 seconds or less depending on tuning but all really quick over a 1/4 mile.
Standed cars are likely to be around 14 seconds or maybe a bit less but it does show what a fresh engine and new Ecu can do for them.
If you have what is a well kept and mechanically sound example with a solid chassis so able to do the miles no problem a new Ecu can transform the cars daily ability into something akin to a modern car.
If you have a keeper that you hope to use extensively over say 5-10 years an Ecu and wiring upgrade will truly make the deal a realistic aim. Mine was bullet proof for over 10 years and the Ecu was largely the reason why. That and the very impressive water tight nature of Powers wiring harness.
I started it in -10 once just to see and it fired first kick lol.
Brilliant.
I eventually recorded a time of 12.60 as my fastest time.
That equates to 0-112 mph from a standing start to a 1/4 of a mile.
Really pretty quick for one of these. All rolling roaded and mapped and tuned at powers.
If I had ported heads, biggest valves and all matched to the ported inlet system more similar to 5.0 spec I’m sure it would get closer to 12 seconds dead.
Many of the old boys brigade who regularly tracked or just had fun on circuits and drag strips with these cars 10 odd years ago many recorded around 12 seconds or less depending on tuning but all really quick over a 1/4 mile.
Standed cars are likely to be around 14 seconds or maybe a bit less but it does show what a fresh engine and new Ecu can do for them.
If you have what is a well kept and mechanically sound example with a solid chassis so able to do the miles no problem a new Ecu can transform the cars daily ability into something akin to a modern car.
If you have a keeper that you hope to use extensively over say 5-10 years an Ecu and wiring upgrade will truly make the deal a realistic aim. Mine was bullet proof for over 10 years and the Ecu was largely the reason why. That and the very impressive water tight nature of Powers wiring harness.
I started it in -10 once just to see and it fired first kick lol.
Brilliant.
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