Tech Talk

Forged 3.4

Boosted engine build

04/07/13: Helping a engine breath better is a good thing with the help of a Turbo or Superchargers, at this point we are not discussing the power adders, I like to focus more on the parts that have to deal with the extra power.

Direct in the firing line are you pistons (minimum forged recommended), pending on boost levels we getting our top ring moved lower from the crown of the piston. Full floating pin is what we prefer to use (this can prevent bearing load). We then set the ring gap as per spec. The piston rings are of a different kind over 15 psi 

Connecting rods are the next in line, We think the minimum requirement should be a H or I beam rod, H beam in general weight less then a I beam. We also like to make our rods as long as possible and shift the CD higher up our custom pistons. ARP bolts are to be used. 

Next is the crankshaft, forged if not billet is the go. If this is not in the budget prepping your crankshaft is a must, before you start get the crankshaft inspected(e.g. bend, cracks), remove all casting high risers then get it shot peened, you then have to get it machined if required & balanced.

Your STD crankshaft even prepped has it limits, so do not expect big BHP from a STD Crankshaft. People ring us avery day and telling us they make 400/500 rwhp with std internals, if you drive it for what its build for lets see if it last with std internals.

Stay Safe, SicSix                                                                   

Pre Ecotec & Ecotec Heads
Buick Stage II (NOS Parts)

Holden & Buick V6 engines

05/07/2013: We have our Holden & we have the Buick, Holden Series 1&2 are based on a Buick however it was never used in the USA, The Buick had the Stage I, this was an off centre engine,  Holden however is an on centre engine. The Buick & Holden have same stroke, the Buick (USA) crankshaft will not fit in a Holden block, (Counter weight are bigger)

Cylinder heads: Series I & II ( Holden) and the Stage I & II (Buick) have similarities, the big difference is in the Stage II Buick cylinder head, the stage II has 14 bolts/studs per cylinder and its port design is very good, with inlet valves of 2.050" & 1.600" exhaust some serious # can be gained. 

engine parts before shipping
As it landed in Cairns sneak peek in the box Build in 1990 ready for the dyno

Buick Stage II "barn fined"

In the early part of 2012 a person called Lee Alan Muir contacted us regarding Buick Stage II parts he had in a container, some information about this mans background is,worked with McLaren Engine Division, then joint the Shadow engine and formula 5000 in the US.

At SicSix we ended up with a 940 kg's box and 3 cubic meter, some of the parts are, new Buick stageII V6 engine blocks (5) new crankshafts (6) new Carrillo rods (5) etc. Crankshafts stroke are 2.810 & 2.940, engine blocks are all 4 bolt mains with 3.800 & 4.000 bore

One of the engines in Lee's hands made 940 Bhp @ the flywheel on the Dyno in 1991