284 or 276 cam for 5 litre?

[satinblackv8]

Hey guys, just after info on a cam for my 5 litre.
Having a bit of trouble deciding on which cam I should put on my ute.

Pretty much my mates have swung me in the direction of the crane 276 and 284 cams. Problem is I dont know which one to get. Now to a Lil info on the small growing list of mods

3 inch cat back
K&n filter
Otr intake
Running 98 fuel
Oh and its a manual

Planning on putting 3.9s in the diff so dunno If that will help

Any help will be appricieted thanks

 

[Munz]

BASIC RPM 1800-4500
Compucam H276

214/214 .464 .464
276/276
110 LSA

BASIC RPM 2200-5500
Compucam H284

222/222 .480 .480
284/284
112 LSA

They seem ok but I think this camtech grind would work really well 222/222 112 LSA .511" .511
it has the same duration as the 284 but more lift

 

[satinblackv8]

Cheers. Will that cam effect my low end more than the 284 does ?

 

[Munz]

should be exactly the same even better with 3.9's

 

[satinblackv8]

Yeah Righteo. Say if I didnt get diff gears just yet which cam would give better performance over the stock one

 

[Munz]

Doesn't really matter if you get diff gears or not. It just brings the cams powerband on quicker

What Gearbox A4 or M5?

 

[satinblackv8]

Its an s pac so its got a m35 getrag -.- haha

 

[Munz]

So you'll need a clutch upgrade..... eventually

what series? cause if its series III its gonna change your cam options as its the later 'roller block'

 

[satinblackv8]

Series 2 man. What bout the lifters. Coz crane cams do 3 options

 

[Scrubmonk]

Depends so much on what else you plan to do with the motor, and what you are using it for. Highway cruising, running kids to school or drag racing and speedway? There are heaps of different grinds to go for. Do it once and do it right. A lot of bigger cams need different diff ratios, higher compression ratios, stronger valve springs etc to be effective.

Crane cams now do roller lifters to fit into pre VT non-roller blocks, allowing you to consider the option of going with a roller cam (allows the cam to be more agressive in its shape, giving bigger valve lift with shorter duration).

Have a good look at Greenfoams cam selection thread, it is a sticky under V8 Development forum on Just Commodores.

Personally I have a Wade 963A961A10 in my 5L. Great fun for everyday driving and good fuel economy, but not suited to higher revs. Works well with the std intake manifold, std valve springs, std compression and torque converter.