Effect of a 38mm restrictor on an LS7
Discussion
It's all in and running
running in
Luckily all of the bolt holes were in the same position as the eleven year older LS7. A big time save was being able to use the older LS7 throttle assembly. This fits neatly in the frame, whereas the GM supplied LS3 stem is a clumsy great big thing. All the ancillaries fitted. Flexplate needed a little flettling
As it turns out all of the sensors are the same, other than the MAF, and I could have used my existing engine loom and ECU. However it was past it's best and I did have an occasional misfire from the old engine.
running in
Luckily all of the bolt holes were in the same position as the eleven year older LS7. A big time save was being able to use the older LS7 throttle assembly. This fits neatly in the frame, whereas the GM supplied LS3 stem is a clumsy great big thing. All the ancillaries fitted. Flexplate needed a little flettling
As it turns out all of the sensors are the same, other than the MAF, and I could have used my existing engine loom and ECU. However it was past it's best and I did have an occasional misfire from the old engine.
13 days from collecting the engine, tuned from the data log, to on a trailer on the way to France 
Longest delay was Partsworld didn't have a loom and controller and their shipment was delayed. After a week I realised I didn't need the specific ecu for my tune as I was changing the cam. So I had a 480hp controller and used EFI Live. Well, I plugged it in and Luis Sola made some pretty graphs.
Longest delay was Partsworld didn't have a loom and controller and their shipment was delayed. After a week I realised I didn't need the specific ecu for my tune as I was changing the cam. So I had a 480hp controller and used EFI Live. Well, I plugged it in and Luis Sola made some pretty graphs.
Anecdotally this engine is more free reving with the restrictor. There may be less initial punch, but most times I'm grip limited anyway.
I did do a 1/4 mile at Long Marston with the LS7 without the restrictor, 12 seconds on my only run so not in your league. I could try that again with the LS3 but I have put a cam in to work best with the restrictor.
I did do a 1/4 mile at Long Marston with the LS7 without the restrictor, 12 seconds on my only run so not in your league. I could try that again with the LS3 but I have put a cam in to work best with the restrictor.
Rear diff, fairly sure the spline has stripped on a drive flange. (BMW 210mm LSD 3.91)
I was quite happy with progress on the first day considering how wet it was. Nice to be just above Peterhansel in the timesheets overnight, although he was in a different class.
I've been monitoring my phone but seemed to have missed the call from Peugeot for next year's Dakar.
I was quite happy with progress on the first day considering how wet it was. Nice to be just above Peterhansel in the timesheets overnight, although he was in a different class.
I've been monitoring my phone but seemed to have missed the call from Peugeot for next year's Dakar.
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