Gen 3 build up hints

[vq rat]

Hi all building a gen 3 for my skid car, what i have is a motor thats spun a bearing so i need to rebuild it, its got a 25% under driven balancer, a come racing cam part number Lsch-874, have to fit new crank, rod's and piston's my question is how good are the stock cranks power wise will be fitting arp main bolts to help ( yes i no they are 6 bolt bottom end) have seen a few stock ones go to hell and back and still run mint and any other hints to help be a strong motor, it will be carby feed by 750 ultra holley and a edelbrock victor jr manifold and msd timming module thanks lee

 

[Ian Johnston]

While not being an expert, most modern engines will take a fair bit of a hammering in stock form. Spinning bearings has nothing to do with crank quality. If good oil, and often changed, shouldnt be a problem. Maybe check, and replace the oil pump for good measure.

 

[cpbait]

From some off the power figures iv seen or read rather the standard crank with good set off rods and pistons, even with standard rods and pistons have copped a belting, especially some off the forced induction engines pulling 400odd rwkw, fresh bearings and get the crank checked and balanced and should be ok.
worth doing a new set off rods and pistons or at least new rings while its apart if budget stretches that far.

 

[vq rat]

The reason be hide the bearing failing was the motor has done about 100,000kms and then put in a vk drag car ran a 6.8 down the 1/8 with 150hp of NOS it had done a few seasons so not really worried about why just looking to make it in to a good motor, will be fitting a new stock crank, full bearing set have been looking at these rods eBay Australia: Buy new & used fashion, electronics & home d for it, thinking of doing the heads as well with ports and so on thanks for the input guy lee

 

[Munz]

that rod length is way too long (6.200), standard is 6.098 - you'll probably need a piston and rod combo to suit which would be easier

will the car be using NOS again?

 

[vq rat]

Na no more gas (nos) for it, thanks for the info i have ordered a few ls1 build up book's to look at

 

[Munz]

yea no dramas - you can also buy a mains stud girdle for that added protection of block flexing