dans28
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- Feb 26, 2012
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Hi All
I have a VP SS which has been recently rebuilt using a spare VS Stato V8 which was rebuilt with Flattop pistons we added a 4001 Crow Cam which is advertised as [email protected] or real [email protected] LCA 112
This has been a bit of a project and not many parts were in working condition so I would say all the common things have been replaced with new or checked.
New: TPS, IAC, Fuel pump, Map Sensor, Bosh fuel pressure regulator, ignition module, coil dizzy etc etc.
We even brought a direct replacement for the metal bosh injectors when using these injectors the problem is substantially worse.
So at the moment the car is using the old factory injectors and using a tuned copy of someone’s 5.0 conversion dyno with a stock or near stock engine, if we try to use a stock memcal in the same ECU it’s also substantially worse...
Now with the slightly tuned chip and the old factory injectors it idles the best of all options however the hunting/surging idle is less obvious but still there.... and every now and then it has what I call rough spot(rough idle) where it kicks... then comes good then returns to a slight surging/hunting
No codes on this setup
When driving with the old injectors the mid range to high range power feels like it’s lacking a little compared to the other injectors which feel very responsive and feels fantastic above idle (plenty of go) and sounds smooth etc, but as I said using the new injectors increases the surging/hunting at idle and has also caused the engine light to come on occasionally and indicates the car is running to rich.... the engine light does go out after a while and other times it doesn’t even come on..
Having said that the old injectors still give good power the new ones just seem to give a more responsive feel...
Hopefully the information isn’t to confusing too what’s happening however I just wanted to make sure it’s right before paying for a day on the Dyno only to discover there’s an issue
I would’ve thought with the small cam and minimal engine/head work the car should’ve ran perfectly well on a stock memcal....
Cheers in advance.
I have a VP SS which has been recently rebuilt using a spare VS Stato V8 which was rebuilt with Flattop pistons we added a 4001 Crow Cam which is advertised as [email protected] or real [email protected] LCA 112
This has been a bit of a project and not many parts were in working condition so I would say all the common things have been replaced with new or checked.
New: TPS, IAC, Fuel pump, Map Sensor, Bosh fuel pressure regulator, ignition module, coil dizzy etc etc.
We even brought a direct replacement for the metal bosh injectors when using these injectors the problem is substantially worse.
So at the moment the car is using the old factory injectors and using a tuned copy of someone’s 5.0 conversion dyno with a stock or near stock engine, if we try to use a stock memcal in the same ECU it’s also substantially worse...
Now with the slightly tuned chip and the old factory injectors it idles the best of all options however the hunting/surging idle is less obvious but still there.... and every now and then it has what I call rough spot(rough idle) where it kicks... then comes good then returns to a slight surging/hunting
No codes on this setup
When driving with the old injectors the mid range to high range power feels like it’s lacking a little compared to the other injectors which feel very responsive and feels fantastic above idle (plenty of go) and sounds smooth etc, but as I said using the new injectors increases the surging/hunting at idle and has also caused the engine light to come on occasionally and indicates the car is running to rich.... the engine light does go out after a while and other times it doesn’t even come on..
Having said that the old injectors still give good power the new ones just seem to give a more responsive feel...
Hopefully the information isn’t to confusing too what’s happening however I just wanted to make sure it’s right before paying for a day on the Dyno only to discover there’s an issue
I would’ve thought with the small cam and minimal engine/head work the car should’ve ran perfectly well on a stock memcal....
Cheers in advance.
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