435ci Road racing re-blocked LS7 engine
03-02-2015, 01:37 AM
#1
435ci Road racing re-blocked LS7 engine Hi All,
At the same time as I am building an all new short stroke/ big bore 400ci LS engine for my Mosler race car, my engine builder is rebuilding the cars existing LS7 based engine, that the car's previous owner had re-blocked with an excellent RHS block and also had the crank and connecting rod's upgraded with a Callies Magnum Crank and their ultra-light rods, which are all nice pieces in their own right.
However, they never changed the stock LS7 cylinder heads, or the intake manifold, because under the FIA GT3 rules they had a limit of 600 BHP, and were also forced to run restrictors in the cold air-box.
As we are not restricted by any engine performance rule, we are rebuilding the engine with new LSX-lS7 cylinder heads, and a new intake manifold.
In addition to these bolt on items we are increasing the bore size to 4.165", which will increase the cubic capacity by a little over 8ci resulting in a 435ci engine, and swapping out the camshaft for one that Kip from Cam Motion has spec'd for us.
So in the next few weeks I will post some build photo's as well as transfer the Flowcharts etc, from my "Short Stroke/Big Bore thread.
Cheers,
Mark.
At the same time as I am building an all new short stroke/ big bore 400ci LS engine for my Mosler race car, my engine builder is rebuilding the cars existing LS7 based engine, that the car's previous owner had re-blocked with an excellent RHS block and also had the crank and connecting rod's upgraded with a Callies Magnum Crank and their ultra-light rods, which are all nice pieces in their own right.
However, they never changed the stock LS7 cylinder heads, or the intake manifold, because under the FIA GT3 rules they had a limit of 600 BHP, and were also forced to run restrictors in the cold air-box.
As we are not restricted by any engine performance rule, we are rebuilding the engine with new LSX-lS7 cylinder heads, and a new intake manifold.
In addition to these bolt on items we are increasing the bore size to 4.165", which will increase the cubic capacity by a little over 8ci resulting in a 435ci engine, and swapping out the camshaft for one that Kip from Cam Motion has spec'd for us.
So in the next few weeks I will post some build photo's as well as transfer the Flowcharts etc, from my "Short Stroke/Big Bore thread.
Cheers,
Mark.
