Diff gears/stally with cam

[GMHCalais]

hey all. Im buying a crow cam 4503 and just wanting to know if chucking a stally and diff gears Will improve torque and power? The cam starts in at 2200 and finishes as 5500 if i remember correctly. Anyone got any advice as to what is a good combo? Also what type cams fit into series one and two vs ss's? Cheers

[GTP 85]

you'd want some compression to help get the best out of it. It's pretty close to a Crane 286 and they can go backwards on some stock engines... others can sound good but not make a lot more poke than an engine with bolt ons

[DANNY8]

I'd definitely go a stally. I think the cam goes from 2500-5500. I'd prolly go a 3000rpm stally, just because sometimes they don't flash right up depending on how much power ya making. As for diff gears, it depends on wat ya wanna do I guess. I put 4.11's in my wagz coz we built it to go in skid comps, but also wanna cruise around in it and the 4.11's really #### ya off on the highway coz ya sit on like 3000rpm on about 90-100k's. But yeah really depends on wat ya wanna do and how ur gonna use it. If it's just town driving and ya want good acceleration then yeah 4.11's, but like I mentioned b4 they get annoying on the highway, so if u plan on doing a fair bit of highway driving maybe go 3.9's.....which still wouldn't be good on the highway, but ya don't build a hot motor to have good fuel economy do ya... lol

[Blown V6 Hatch]

Get some compression into it, or it's not really worth it unless you like getting beaten by near stock 5 litres...

[GMHCalais]

I'd definitely go a stally. I think the cam goes from 2500-5500. I'd prolly go a 3000rpm stally, just because sometimes they don't flash right up depending on how much power ya making. As for diff gears, it depends on wat ya wanna do I guess. I put 4.11's in my wagz coz we built it to go in skid comps, but also wanna cruise around in it and the 4.11's really #### ya off on the highway coz ya sit on like 3000rpm on about 90-100k's. But yeah really depends on wat ya wanna do and how ur gonna use it. If it's just town driving and ya want good acceleration then yeah 4.11's, but like I mentioned b4 they get annoying on the highway, so if u plan on doing a fair bit of highway driving maybe go 3.9's.....which still wouldn't be good on the highway, but ya don't build a hot motor to have good fuel economy do ya... lol

Yeah nah i for sure wanted to chuck a stally on it, just wanting to get some info. How would i get some compression into it to get some good results back.

[Blown V6 Hatch]

Put a set of flat top pistons in it. Alternatively, if you're after a cheap and half arsed band-aid type fix, you can have a heap shaved off the heads.

With most aftermarket cams, 10:1 compression will work well.

[GMHCalais]

Put a set of flat top pistons in it. Alternatively, if you're after a cheap and half arsed band-aid type fix, you can have a heap shaved off the heads.

With most aftermarket cams, 10:1 compression will work well.

Anyone know of a good place that does shave heads or sells cheap flat tops?

[mr j-man]

Anyone know of a good place that does shave heads or sells cheap flat tops?

ACL flat tops....are the go...pretty easy to source..id go the pistons and new rings. at least your compression wont drop with a new set rather than shaving the heads! hunt on ebay for the pistons

[DANNY8]

Anyone know of a good place that does shave heads or sells cheap flat tops?

Miltons have a good reputation, I'd go there.....well my donk IS there lol. 48-50 Main North Road, Prospect.

You're a week too late! I just sold a set of 30thou ACL flat tops on ebay for $300.

[Blown V6 Hatch]

ACL flat tops....are the go...pretty easy to source..id go the pistons and new rings. at least your compression wont drop with a new set rather than shaving the heads! hunt on ebay for the pistons

Please explain, how will the compression drop by shaving the heads?

[GMHCalais]

Miltons have a good reputation, I'd go there.....well my donk IS there lol. 48-50 Main North Road, Prospect.

You're a week too late! I just sold a set of 30thou ACL flat tops on ebay for $300.

haha! always the way isnt it!!

[Green_Beast]

Diff gears/stally with cam rules...My brother used to have BA XR8 with 4.11, 3000 Dominator Hi-Stall converter and stage 2 crow cams...It was a beast but the fuel economy wasn’t the greatest. He used to get somewhere between 270-300km out of full tank…

[Blown V6 Hatch]

Hmm, comparing the Boss 5.4 to a Holden 304 V8? Not a very good comparison....Totally different animals.

[Munz]

[/B]

Please explain, how will the compression drop by shaving the heads?

it still increases comp but I think he means when you shave any set of heads the chamber bowl area becomes a different shape so it needs to be reworked to get the most out of it

[Brendo169]

put some 3.9 diff gears in and a 3000rpm stally....along with the flat tops and cam.....will definately wake you up!!!

ive always had diff gears but only just recently put on a high stall and im now wishing i did that years ago!!

[mr j-man]

[/B]

Please explain, how will the compression drop by shaving the heads?

shaved heads with stock pistons and rings! as u know shaving heads increases compression right! increasing compression increases heat and strain upon combustion on a stock ring and piston especially when it reaches TDC. So a stock piston/ring depending on its age that isnt designed for the higher ratio - over a period of time your definately garaunteed to lose compression through the weakining of the old rings depending the age and newly designed ratio! (heat of compression) and (piston fit)......mechanical engineering.....why do u think they lower compression ratios when forced induction is used....to eliminate excessive heat and impact at TDC...just to name a few

[ari666]

shaved heads with stock pistons and rings! as u know shaving heads increases compression right! increasing compression increases heat and strain upon combustion on a stock ring and piston especially when it reaches TDC. So a stock piston/ring depending on its age that isnt designed for the higher ratio - over a period of time your definately garaunteed to lose compression through the weakining of the old rings depending the age and newly designed ratio! (heat of compression) and (piston fit)......mechanical engineering.....why do u think they lower compression ratios when forced induction is used....to eliminate excessive heat and impact at TDC...just to name a few

i have never heard such utter crap in all my life.

[Blown V6 Hatch]

Nevermind, no point.

[Reaper]

This thread reminds me of the hot rodder's mantra:

Cheap/Reliable/Power - Pick 2.

Do yourself a favor - think thru what you want the car to do and then go visit a good engine builder who can put together a combo that will do the job as a system. Just throwing random bits together will most likely end up with an ill manored pig that will be slower than a VP V6 (granted they are faster than most things on the road - just ask anybody who owns one!)

Reaper

[Blown V6 Hatch]

This thread reminds me of the hot rodder's mantra:

Cheap/Reliable/Power - Pick 2.

Do yourself a favor - think thru what you want the car to do and then go visit a good engine builder who can put together a combo that will do the job as a system. Just throwing random bits together will most likely end up with an ill manored pig that will be slower than a VP V6 (granted they are faster than most things on the road - just ask anybody who owns one!)

Reaper

No way Reap, VN V6's are faster, everybody knows that....

But seriously, 100% agree with that post.