I sent an email to summit racing, attached BTR part list, with some questions (after watching a lot of clips in YouTube about choosing and replacing or changing or swapping camshafts) and got some answers (not all) but at least they minimize the part list little bit...
Why I cannot get clear answers for my questions???!!!
Today I sent the same questions to BTR also.
I will be thankful to anyone who would reply to my notes below..
At first what is the type of my engine L83?? is it LT or LS or LS2 or LS3 or LS7 or it is L83??? If it is, then how to know the suitable parts (year, model..etc) that I could use from other GM engines?
1- None told me if any modifications needed (this is stage 4 Truck Norris) such as headers or exhaust, injectors..etc.
2- Should I upgarde the trunnions or not?
3- Is it right that the valve spring should be 50 more than the valve lifts (in number) for example valve lifts 620 = spring 670?
4- Is the valve spring should be doubled to last longer or single?
5- No valley cover included in the list, Someone said that I could use the same cover just put the plugs/pins in the valley holes and others uses ls7 valley cover (what is ls7?? which model & year? which car is that?)
6- No one mentioned about Cam VVT Phaser Limiter 4 degrees, the Phaser disassembly wrench and Phaser spring lock, where or how to use them?
7- High Pressure Fuel Pump "Lash Cap" (under the valley cover), they said should be added if it not there?
8- Our engines using High Volume Oil Pump and they said better to block/close/plug the Pressure release valve in the oil pan with M14X1.5mm pipe plug and change the oil pump from HV to normal one?
9- Should I change the OEM spark plug wires to Dragon Fire 500 ohms?
Thank you in advance and wish you the best
Ahmed