Discussion
Hi John,
Unfortunately not. Time started to even away through work and a house move.
It is however fairly straightforward and Syvecs is a great price of kit. Especially from a fault diagnosis point of view.
When you the car won’t start and you think “do I have a spark”. You can just go to the lap top a trigger a spark on a certain plug !! Very cool.
The most work is in making the throttle bodies breathe
Unfortunately not. Time started to even away through work and a house move.
It is however fairly straightforward and Syvecs is a great price of kit. Especially from a fault diagnosis point of view.
When you the car won’t start and you think “do I have a spark”. You can just go to the lap top a trigger a spark on a certain plug !! Very cool.
The most work is in making the throttle bodies breathe
If you want idle control, you'll be switching to manifold pressure sensing rather than mapping by throttle position. Thereafter you'd better be damn sure your throttles are all bob-on. Getting the bushes right is only half the battle and crucially you won't know when either side has drifted. Personally I would avoid any system that relies on MAP and one lambda sensor assuming the other bank is acting the same.
If you're going to the expense of fitting an aftermarket ecu, and you want idle control, then why not go drive by wire ? By the time you've modified your throttle bodies to take pipes for an air valve you might as well fabricate some bracketry for an actuator, and cable operated pedal sensor setup.
Believe it or not it's roughly the same issue that I came up to you with, about 5 years ago? Although after mapping it did run a hell of a lot better for a while 
Poor pick up from very low revs resulting in either embarrassing bunny hops or having to declutch when trying to roll on from about 1k rpm. It used to be easy to commute into London but it's too much hard work now. Pulling away used to be just a whif of throttle or just use the torque and clutch to get going. Now sometimes it refuses to take a small throttle opening and bogs down.
Poor pick up from very low revs resulting in either embarrassing bunny hops or having to declutch when trying to roll on from about 1k rpm. It used to be easy to commute into London but it's too much hard work now. Pulling away used to be just a whif of throttle or just use the torque and clutch to get going. Now sometimes it refuses to take a small throttle opening and bogs down.
s6boy said:
Believe it or not it's roughly the same issue that I came up to you with, about 5 years ago? Although after mapping it did run a hell of a lot better for a while
Poor pick up from very low revs resulting in either embarrassing bunny hops or having to declutch when trying to roll on from about 1k rpm. It used to be easy to commute into London but it's too much hard work now. Pulling away used to be just a whif of throttle or just use the torque and clutch to get going. Now sometimes it refuses to take a small throttle opening and bogs down.
Ah found the graphs .. only did a partial remap and the power wasn't sparkling so that engine has possibly been slightly poorer than usual from the get-go ? interestingly i cant find any mention of idling issues .. the invoice just says partial remap, and the emails from 2016 don't mention idling issues either, unless ive lost some and i normally keep absolutely every email for reference purposes.Poor pick up from very low revs resulting in either embarrassing bunny hops or having to declutch when trying to roll on from about 1k rpm. It used to be easy to commute into London but it's too much hard work now. Pulling away used to be just a whif of throttle or just use the torque and clutch to get going. Now sometimes it refuses to take a small throttle opening and bogs down.
any road up, once its rebuilt and back to a better-than-new standard of build it should be as good as any other / better than others
issues with drivability just off idle though sounds more a throttle body wear issue than anything else ? I can recommend Andy Hoile for refurbishing those. I think his PH name is mr2turbo or mr2sc or something similar.The Andys roller bearing mod was the first thing I had changed.
You're right it was booked in for low speed running behaviour but I mentioned the idle as after you'd done the tune it seemed to be running better all round. Could have been halo effect
Glad you mentioned the graphs. I dug yours out too and compared them to a run done at Emerald last year. The profiles are dead on - nice and smooth still
but the thing that stands out is the power is near enough identical up to 4K rpm. Then they goes to 348bhp while yours was 320. I know they're different but I'd have expected a difference across the whole range?
You're right it was booked in for low speed running behaviour but I mentioned the idle as after you'd done the tune it seemed to be running better all round. Could have been halo effect
Glad you mentioned the graphs. I dug yours out too and compared them to a run done at Emerald last year. The profiles are dead on - nice and smooth still
but the thing that stands out is the power is near enough identical up to 4K rpm. Then they goes to 348bhp while yours was 320. I know they're different but I'd have expected a difference across the whole range?Gassing Station | Speed Six Engine | Top of Page | What's New | My Stuff