Anyone Running A 284/272 or Similar Cam?

[Low Level E30]

As mentioned in the title - anyone out there running a 284/272 asymmetrical cam, or similar?

How do you like it? What is the power delivery like?

Did you upgrade your valve springs?

Does it have a lumpy idle (or not idle at all...) ?

Any further input?

Thanks!!

[Low Level E30]

-Bump-

[MrK]

I wouldn't worry about idle. I idle fine (if a little lumpy) at exactly 800rpm.. and I have a 304/304 :D

[Low Level E30]

I wouldn't worry about idle. I idle fine (if a little lumpy) at exactly 800rpm.. and I have a 304/304 :D

Oh, I'm not afraid of a lumpy idle :D --- I like that!

I am really more interested in what I need to run the cam --- adjustable cam gear? New or upgraded valve springs? Etc.

And how does it perform? Where does the power come in? Does it have an on / off switch at a certain RPM?

[yozsi]

Oh, I'm not afraid of a lumpy idle :D --- I like that!

I am really more interested in what I need to run the cam --- adjustable cam gear? New or upgraded valve springs? Etc.

And how does it perform? Where does the power come in? Does it have an on / off switch at a certain RPM?

if your talking about the m20 engine, it does not have variable cam timing. the adjustable cam gear can only be set when the motor is off.

[rwh11385]

shrick or catcam. stay away from regrinds (ie racetep). also, I wouldn't go with anything less than a 284, it will idle just fine and make a bigger difference than a 274. a dual pattern is even better, my idle is pretty smooth with the 284/272, and I love the way it lopes. I kinda wish I'd have gone with a 288 or more, but I know I would have regretted a 274.

if i were going for a cam ever, as a fun car, it'd be a dual pattern one.

for KP, i might go 288, or may still go for a 284/274

Ted ran one too

Correct, thanks Chris. It's got an Ireland 3.0L stroker kit, Pauter rods, a Schrick 284/272 cam, mild headwork, 9.8:1 pistons, custom Borla exhaust, 21.5# injectors. That's the major stuff, and I have a Stahl header on the way. Hope that answered your question.
-Ted

[rwh11385]

Why install such a mild cam? A 272 or 274 is only a little hotter than the stock cam. Go for a 284/272 or something similar, the dual-pattern should work well with a low-torque load engine.

For a stroker, especially a 3.0L, look into something like a 288 or 292.

[Low Level E30]

if i were going for a cam ever, as a fun car, it'd be a dual pattern one.

for KP, i might go 288, or may still go for a 284/274

Ted ran one too

How 'bout a DBilas 282/272? Very cheap over here...

Do I need new valve springs? OE or upgraded?

[rwh11385]

PM nando

[MrK]

Oh, I'm not afraid of a lumpy idle :D --- I like that!

I am really more interested in what I need to run the cam --- adjustable cam gear? New or upgraded valve springs? Etc.

And how does it perform? Where does the power come in? Does it have an on / off switch at a certain RPM?

I have an adjustable cam gear, but it's only because I decked my block and used the cam gear to get the timing aligned again, not for the cam itself. I did put stiffer valvesprings as insurance, and I recommend that you do too. Of course the tamer the cam, the less likely you'll need stiffer springs.

Performance of the car changes totally with a 304/304 cam... you lose major low-end torque, but high-rpm power jumps significantly. You'll end up with a peakier (but IMO more fun) engine.

No, there's no 'on-off' switch per se, but you'll be able to feel a cam start breathing around 4 to 5k rpm, depending on what cam you choose. Mine comes alive at 5k.

[Low Level E30]

Probably no need for the cam gear on a stock motor w/ a 282/272, huh?

I will probably just use new OE springs --- I've heard that stiffer springs can cause cracking in these heads.

This will be for a track car anyway, so I ain't skeered of the low-end Tq loss :D

[MrK]

With a 282/272 you'll be fine with new OE springs. Enjoy :)

[Low Level E30]

In that case... anybody wanna buy an adjustable cam gear :D ?

[MrK]

In that case... anybody wanna buy an adjustable cam gear :D ?

If I'm not mistaken, both diegom6 and digger are in the market for an adjustable cam gear.

[nitro325is]

On one of my cars Ive got a BMP 282/272 cam with their HD valvesprings for insurance because that cam is high lift 11.5/11.0 ......so check your spec as well. I wouldnt trust oem springs with that.
You can feel it come on at 4000 rpm feels great especially on a highly modded engine like mine.