higher than 220 duration with 1.8 rockers??

[FuryCharger]

my buddy tld me that the GT cam would be to lowa duration, i should go more agressive and def put some rocker arms in there to allow or more air to enter for the longer duration.

[Turbo V6 Camaro]

you going NA/NOS/SC/turbo???

ans 220 on what side?

[RallyRed 98]

you can't add much more duration without first getting comprehensive tuning. adding a lot of lift (by changing rocker ratio) to our stock heads will cause you some problems too; you will need to mill your pedestals / add better valve seals / replace stock with modified retainers.

that is a very basic rundown though; you will want to talk to somebody with more specific knowledge.

[ May 10, 2004, 09:21 PM: Message edited by: RallyRed 98 ]

[Turbo V6 Camaro]

stock heads no more then .500 lift

duration just takes tunning for the car to run without stalling or hoging gas like a 4 barrle 555 lol

[98Camaro3.8]

Originally posted by viper04af:
stock heads no more then .500 lift

You should be able to safely run between .520 - .530 on stock heads.

[RedFrk13]

1.8 rockers on a GT cam would make the lift .570, which is to much for stock heads.

[Drone51]

Originally posted by 98Camaro3.8:
</font><blockquote>quote:</font><hr />Originally posted by viper04af:
stock heads no more then .500 lift

You should be able to safely run between .520 - .530 on stock heads. </font>[/QUOTE]

[FuryCharger]

so if i got an aggressiv cam being higher than 220 with everything else stock, would my engine be straight?

[98Camaro3.8]

There's more to a cam than just duration. Lift, Lobe Seperation, and more are equally as important. An aggressive cam may well go beyond the limits of an otherwise stock engine. We can't tell you how a cam will act while just knowing that it's duration is &gt; 220.

http://users.spec.net/home/emxjc/cam_shaft_power.html

[pgriffith]

I bet your buddy has a v8 or something. He probly doesnt know much about the 3.8 motors so take advice from people on this forum and not your friend.

[Timbo1969]

.525 is supposed to be the limit on stock heads, after that milling is required. I know Matt (One QuickV6) has his cam on stock heads with .528 lift. I really wouldn't suggest running any cam without at least having some minor headwork done.

[AZ3.8Camaro]

Id say mill down the valve seal pedastals and go for it. You can probably do it with a dremel.

[pgriffith]

I dont think the added lift from 1.8 rockers is going to net you much more power. Its only going to give you problems. I would stick with the 1.6 stock rockers and try 220 duration if you want. You can still run high lifts with stock rockers, if you run high lifts with 1.8 rockers i think you will have problems. 1.8 Rockers are expensive anyways. Save your money.