how come people stick to a 224 in a 5.3?
08-17-2009, 07:19 PM
#1
how come people stick to a 224 in a 5.3? whats the reason people chose to stick to around a 224 cam in a 5.3 what if someone wanted something bigger... like what would the equivalent for like a ms4 be in a 5.3?
i just want to know why no one goes real big with a 5.3. i know people will say "bigger is not always better" and i know that, but thats not what im askin.
i just want to know why no one goes real big with a 5.3. i know people will say "bigger is not always better" and i know that, but thats not what im askin.
08-18-2009, 02:16 AM
#3
No need to be a dick to the guy...
You can run a large cam in a 5.3 if your setup calls for it (ie light car, high stall, tall gears, etc).
5.3's aren't as big as 6.0's, therefore they don't "eat up" cams as well as a larger displacement motor. Not sure else how to explain it...
You can run a large cam in a 5.3 if your setup calls for it (ie light car, high stall, tall gears, etc).
5.3's aren't as big as 6.0's, therefore they don't "eat up" cams as well as a larger displacement motor. Not sure else how to explain it...
08-18-2009, 11:33 AM
#6
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because 90% of the time the engine is in a heavy *** truck...also due to the smaller cubes and lower CR,the power band is higher than an ls1 or 6oh......an ms4 and a 5.3 would make for 7000rpm shifts....
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08-18-2009, 01:55 PM
#9
Right, the get a little lazy if you get carried away with large cams. Just have to remember you have a few less cubes and low compression. You get in the 230 duration range and they sound pretty nasty. They work better when you mill the heads though.
08-18-2009, 01:58 PM
#10
Another reason is driveability. Smaller motors don't "swallow" cams as well, so a 224 will tend to run more like a 228-230 cam in a 5.3L motor.
In any 5.3L builds I do I typically use something in the 218-224 range in duration, mill the **** out the heads, and make some crazy TQ. Always works well and drives nice & smooth.
In any 5.3L builds I do I typically use something in the 218-224 range in duration, mill the **** out the heads, and make some crazy TQ. Always works well and drives nice & smooth.
08-19-2009, 08:27 PM
#16
you should be ok with that cam as it has -7* overlap.
Get ya one of these...
http://cgi.ebay.com/ebaymotors/Preci...=p4506.c0.m245
Get ya one of these...
http://cgi.ebay.com/ebaymotors/Preci...=p4506.c0.m245
08-19-2009, 08:36 PM
#17
You still have the lack of compression issue, you can put all the intake, carb, exh in the world on it but if the dcr/scr is low then a big cam will only add to that problem. what everyone has said above is the motor is smaller to begin with so just from that you have to match the cam accordingly, secondly and more importantly the compression is much lower, and a big cam even further lowers the DCR so then you have a fat lazy no low end turd trying to pull a near 4 thousand pound brick out of the hole, gonna have no ***** and be no fun to drive. Raise the compression and you have a different story.
08-19-2009, 08:49 PM
#20
then that would help a ton, if you wanna go real big duration even higher is fine, have you read about STATIC compression and DYNAMIC compression? DYNAMIC brings the cam into play in the compression ratio, the question you are asking is about STATIC compression and really means nothing once the cam comes into play, its really all about DCR.
Basically speaking.... the bigger the cam the lower the DCR.. Do some reading on it and you will understand much better.
I do not know how much you need to mill the heads or can before you get into piston to valve clearance, besides you would have to know what cam you are running and what head gasket thickness before that could be calculated anyway. Sorry can only answer part of your question.
Also.. the really big cams are for big end pull, do you want all high end or do you want low end grunt? Thats another wonderful thing about the 224, low end.
If you wanna budget hard running 5.3, mill the heads and do a Z06 cam, it wont be doing wheelies but it will be snappy and fun.
Basically speaking.... the bigger the cam the lower the DCR.. Do some reading on it and you will understand much better.
I do not know how much you need to mill the heads or can before you get into piston to valve clearance, besides you would have to know what cam you are running and what head gasket thickness before that could be calculated anyway. Sorry can only answer part of your question.
Also.. the really big cams are for big end pull, do you want all high end or do you want low end grunt? Thats another wonderful thing about the 224, low end.
If you wanna budget hard running 5.3, mill the heads and do a Z06 cam, it wont be doing wheelies but it will be snappy and fun.