COME Racing assembling the short block and more...
After machining everything you are ready to assemble the engine. A few hints on how to do certain checks to ensure everything goes together correctly. Measuring clearances, cam dial in, lifter preload setting etc.
COME Racing Project Holden V8 prepare and baseline run. Episode 2
Our donor engine (Holden 5litre EFI V8) is given a wash and an oil change prior to mounting it on the engine Dyno. After installing the engine on the Dyno a fresh load of mineral based "Martini" 20w-50w oil is added with a new GM filter. New NGK spark plugs are fitted after a compression test on all cylinders is performed. Ideally the engine should be warm to test compressions but our main goal was to determine that all cylinders are fairly healthy. With 125-130psi per hole all looked good. The goal here is to baseline the power and torque output of a dead stock engine fitted with aftermarket extractors and stock as well as optimised computer program. We started with 1 3/4" Tri-Y headers and switching to 1 5/8" Tri-Y pipes. Both are Pacemaker brand that we have always used on our Dyno. They both have 3" collectors welded to each bank of pipes into an open non muffled Exhaust. We are running the engine as is with stock water pump and alternator, stock Bosch # 960 injectors, stock distributor with base timing set at the factory specified 10 degrees before top dead centre. Power approaching 300bhp and over 330 ft.lbs torque is an excellent result for a dead stock engine with only pipe and software upgrade. We will remove the engine next. Fit an upgrade camshaft, valve springs and timing set to evaluate the relative gains of these changes.
COME Racing Holden V8 oiling system mods
There are so many complaints about the Holden V8 oiling system, that it's actually quite annoying till one puts things in perspective. Do you realise the Holden V8 was designed in Detroit Michigan for General Motors Holden in 1965? Given the engine began life in production Holden vehicles in 1969 we need to step back and give our Australian built "plastic" V8 a little breathing room. Considering the insane power outputs we have forced our Holden V8's to produce it's no wonder the oiling system does not always keep pace. It's really like taking a conventional points type distributor and putting it in a 1300hp Pro Stock Drag Race engine and expecting it to adequately light that engines fire. It will happen, maybe but it will not be effective at all. On the other hand the 308ci version of the Holden V8 was really never expected to make much more power than the originally factory claimed 240bhp. With 240 or even up to 300 or so bhp the oiling system is great. In fact we have found that unless you achieve power levels well over the 500bhp mark the stock oiling system with the best possible oil pan fitted, best possible oil pump and a few minor blueprinting steps will serve you very reliably. This changes of course if the application is any form of endurance work like boat, speedway, circuit or similar race applications. It's from this point on the you either bite the bullet and go Dry Sump setup or at least look at some simple mods we will demonstrate here to prioritise the oiling system for very few dollars. These mods mean theat both lifter bores and main bearings are flushed with large volumes of oil instantly which optimises valve train operation and just as importantly, longer more reliable main and rod bearing life.
How to polish a crank ( crankshaft )
Engine-Guru.com Presents a video on how to polish your crank shaft. Any questions call 616-430-3114 ask for KYLE. We are located out of Grand Rapids, Michigan.