Dyno run AFR & detonation
Discussion
Adding an additional earth and cleaning remaining contacts has got me down to a 2v fuel pump volt drop
Time to run a 30amp +ve cable, so unless advised otherwise, I'll run it from the inertia switch.
Before I start, how do I remove the glove box to access the inertia switch, and also any advise of cable routing? I'd like to avoid ripping out the interior if possible
Time to run a 30amp +ve cable, so unless advised otherwise, I'll run it from the inertia switch.
Before I start, how do I remove the glove box to access the inertia switch, and also any advise of cable routing? I'd like to avoid ripping out the interior if possible
As an outcome to this topic:-
Fuel pressure increased by 3.5psi to 36psi
Fuel pump rewired to maintain pressure at WOT
timing corrected to 28Deg BTDC
Throttle pedal stop adjusted so pot at 96% rather than 75%
AFR corrected and detonation cured by extra fuelling and power/torque significantly improved, both by numbers and shape.
Thank you for the inputs.
Fuel pressure increased by 3.5psi to 36psi
Fuel pump rewired to maintain pressure at WOT
timing corrected to 28Deg BTDC
Throttle pedal stop adjusted so pot at 96% rather than 75%
AFR corrected and detonation cured by extra fuelling and power/torque significantly improved, both by numbers and shape.
Thank you for the inputs.
500’s run std 3.9 rover injectors, there’s much debate - but there’s essentially no headroom at wot and run pretty much 100% duty cycle.
I know this from megasquirting a 500 on the oem injectors with dual widebands.
If you paid a pro a pro for a fuel injection setup in the aftermarket they wouldn’t let it leave premises with anything over 80% duty cycle.
So whilst you have your horses back thankfully, like all 500s that left the factory - it’s a ‘that will do’ approach rather than doing what needed to be done, which was bigger injectors. (and proper trumpets rather than some 45mm offcut mild steel tubes but that’s another story)
I know this from megasquirting a 500 on the oem injectors with dual widebands.
If you paid a pro a pro for a fuel injection setup in the aftermarket they wouldn’t let it leave premises with anything over 80% duty cycle.
So whilst you have your horses back thankfully, like all 500s that left the factory - it’s a ‘that will do’ approach rather than doing what needed to be done, which was bigger injectors. (and proper trumpets rather than some 45mm offcut mild steel tubes but that’s another story)
eliot said:
500’s run std 3.9 rover injectors, there’s much debate - but there’s essentially no headroom at wot and run pretty much 100% duty cycle.
I know this from megasquirting a 500 on the oem injectors with dual widebands.
If you paid a pro a pro for a fuel injection setup in the aftermarket they wouldn’t let it leave premises with anything over 80% duty cycle.
So whilst you have your horses back thankfully, like all 500s that left the factory - it’s a ‘that will do’ approach rather than doing what needed to be done, which was bigger injectors. (and proper trumpets rather than some 45mm offcut mild steel tubes but that’s another story)
I haven't just wound up fuel pressure to meet the required AFR, I've returned it to hold the correct 36psi (2.5bar) Rover standard, it was running 3.5psi low. With everything set back to the correct standard, duty cycle never exceeds 80% and AFRs in the mid 12's.I know this from megasquirting a 500 on the oem injectors with dual widebands.
If you paid a pro a pro for a fuel injection setup in the aftermarket they wouldn’t let it leave premises with anything over 80% duty cycle.
So whilst you have your horses back thankfully, like all 500s that left the factory - it’s a ‘that will do’ approach rather than doing what needed to be done, which was bigger injectors. (and proper trumpets rather than some 45mm offcut mild steel tubes but that’s another story)
Yes, considering the plenum & trumpet mod.
Edited by Kev Bamber on Saturday 25th August 10:00
Classic Chim said:
I calculated based on a well known TVR specialist own flywheel then at the wheels figures of there own development RV8 engined car that adding around 17% road train loss which seems a bit extreme but that would make this 5.0 around 315 hp which is spot on i’d have thought.
Running the oem 65mm afm and injectors ?Classic Chim said:
I calculated based on a well known TVR specialist own flywheel then at the wheels figures of there own development RV8 engined car that adding around 17% road train loss which seems a bit extreme but that would make this 5.0 around 315 hp which is spot on i’d have thought.
It’s power is 269 at the flywheel (top right on the pic).Edited by griffdude on Sunday 26th August 12:01
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