Translation please anyone?

[VSSS_5L]

I emailed the serial number from my crow chip to the people at crow and they emailed me back this.

4502.TXT

******* CROW CAMS SELECT PROGRAM *******

16 COLBERT RD CAMPBELLFIELD 3061
phone (03) 9357 0469 fax (03) 9357 0001


MODEL TYPE 5 Litre (EFI) V/8
|-------------------------[CROW COMPUTER CARD]-------------------------|
| PART NUMBER 4502 Date 30-NOV-01 |
| Cam type: Hydraulic type Profile MIN LIFTER DIA%0.000 |
|----------------------------------------------------------------------|
| Advance Ground on Cam: 2 Lobe separation: 113 |
| .050 VALVE TIMING |
| Inlet opens: -2 BTDC Closes: 40 ABDC .050 Duration: 218 |
| Exhaust Opens: 42 BBDC Closes: -8 ATDC .050 Duration: 214 |
| ADVERTISED VALVE TIMING |
| Inlet opens: 30 BTDC Closes: 72 ABDC ADV Duration: 282 |
| Exhaust Opens: 73 BBDC Closes: 23 ATDC ADV Duration: 276 |
| Inlet lobe lift at TDC on the over lap:.043 |
|----------------------------------------------------------------------|
| Valve lift Inlet: .4867 Inlet Rocker Ratio: 1.65 |
| Valve lift Exhaust: .4867 Exhaust Rocker Ratio: 1.65 |
| |
|----------------------------------------------------------------------|
| RECOMENDED VALVE TRAIN COMPONENTS |
| Valve Springs: Spring height: Collets: |
| Retainers: Pushrod: Lifters: |
| H/D Timing Set: |
|----------------------------------------------------------------------|

These HIGH PERFORMANCE components should be checked for suitabilty by the
person installing them as engines of the same group can vary in
valve length spring installed height and collet grooves
IT THE SOLE RESPONSIBILTY OFF THE INSTALLER TO CHECK SUITABILTY

ALL ENGINES
To ensure your camshaft is the correct model for your application place
new cam next to old cam and check the following points
Do the lobes all point the same way
Are the holes or grooves in bearing journals the same
Is the distributor gear the same size and angle and position on camshaft.
Is the fuel pump lobe in the same place on the camshaft

Holden 5 Litre 1989 on fitted with fuel injection.
Check lobe positions against old cam before fitting.


Doesn't really mean much to me though...heh. Can i put 1.72 ratio roller rockers on it?

[SilverVH]

Short answer no.

It is not an agressive profile cam either, so wouldn't really warrant going to a roller rocker.

[ari666]

Can i put 1.72 ratio roller rockers on it?

they make 1.72 for 5.0's??? or are you confusing this engine with a V6?

if you look closely at the numbers it says:

| Valve lift Inlet: .4867 Inlet Rocker Ratio: 1.65 |
| Valve lift Exhaust: .4867 Exhaust Rocker Ratio: 1.65 |

which means you MUST fit higher ratio rockers, cos' stock holden are 1.6. i have never seen any rockers bigger than 1.65 tho. unless you are spending BIIIIIG bucks.

[VSSS_5L]

Hey Mate,

I can do the high ratio (1.72) for the VS SS 5.0L as follows

ST 2042 non adjustables
ST 2043 adjustables

That's from the yella terra guy on this forum.

I was under the impression stock 304 rocker ratio was 1.65

[ari666]

i was under the impression they were all 1.6 anyway

4867/1.65= .2949 (lobe lift)
2949x1.72= .5072 (valve lift)

just over the 500 lift mark which isnt outrageous, so you will need to check your springs to make sure they are ok for 500. dont listen to people when they say stock LT1's are good for 500 lift, its BS i cracked 3 over the space of 2 years. you will need to get good ones.

with that much angle on the rocker you will absoloutely need hardened rods, and you will have to check your roller-to-valve tip clearances really well, also may need to check valve retainer to rocker clearance, but im sure YT would have taken care of that.

whats gonna happen with that cam is its gonna have bugger all duration (218 is the babiest of the babys) but a mental amount of lift, which will mean that pretty much the whole valvetrain is gonna be put under strain. under revs those valves are gonna be bouncing all over the place, so i would advise buying and fitting everything properley:

collets (locks)
retainers
spring cups
springs
pushrods

i dunno. id be interested to see how long your heads will last with a rocker ratio like that.

[VSSS_5L]

Maybe i'll just get the 1.65's. Dunno. I think when the cam went in it didn't get new valve springs, coz one broke and then i got the valve springs from crow matched up when i rebuilt the engine.

I was kind of hoping i could just buy the 1.72's and bolt them in and end up with a slight power increase.

[ari666]

yeah it will give you a power increase. how long your valve train will last is anyones guess...

HOWEVER! YT are not a cheap crap brand, so it may be possible they have figured out a way around the insane amount of sideloading, i just cant imagine it possible.

[SilverVH]

Standard Holden V8 rocker ratio is 1.63

Just sayin...

[ari666]

as much as i would like to believe you, i am gonna need more proof than just your word.

[SilverVH]

as much as i would like to believe you, i am gonna need more proof than just your word.

lol...

It doesn't really phase me what you think.

It was aimed at the OP...

[ari666]

It was aimed at the OP...

trying to hinder him with bad information?

[SilverVH]

How?!

Go get a stock rocker and measure the ratio.

You make me laugh.

[ari666]

i dont need to. my holden V8 bible says they are 1.6. i doubt it would lie.

[SilverVH]

No no, I really think you do need to...

*edit*

Actually don't worry, such a trivial pointless exercise.