Gentlemen,

It's been so long since posting like this it seems almost foreign to me. Here's the situation - cam selection from 3 cams I have been really eyeballing.

A.) Comp Cam 282S:
*RPM Range - 2000 to 6000
*Adv Duration - 282 both sides (in. and ex.)
*Duration @ .050 - 236 both sides (in. and ex.)
*Lift w/1.5 - .495 both sides (in. and ex.)
*LSA - 110 deg.

This cam in my opinion is a perfect street cam. I've heard nothing but rave reviews about it! (For the exception of it's lack of audible thumping) LOL

B.) Comp Cam 294S:
*RPM Range - 2500 to 6500
*Adv Duration - 294 both sides (in. and ex.)
*Duration @ .050 - 248 both sides (in. and ex.)
*Lift w/1.5 - .525 both sides (in. and ex.)
*LSA - 110 deg.

Again, I’ve heard nothing but good things about this cam either. The idle quality (thumpety thump) is much better. And it's been told that it is more of a fit for my cars needs. (Compression, upgradability, power, etc) I think this is as big as I would go with a street cam!

C.) Comp Cam XS282S:
*RPM Range - 2400 to 6800
*Adv Duration - 282 / 290 (in. and ex.)
*Duration @ .050 - 244 / 252 (in. and ex.)
*Lift w/1.5 - .520 / .540 (in. and ex.)
*LSA - 110 deg.

This is the cam I really, really have been considering! It's caused more strife than I would care to disclose.... chiefly because I haven’t heard two sentences mentioned about his particular cam / profile / grind at all.

Link to CC Cam catalog:

http://www.compcams.com/Technical/C...TML/128-169.asp

Now I know what the next question you all are gonna ask me... my set-up, purpose, expectations, needs, requirements, SSN, library card number ... LOL So here you go.

Vehicle: 84 Fire Bird
Weight: 3400 lbs
C.I.D: 383
Compression: 10.7:1
Heads:
*World Sportsman II's
*200 runners
*64 cc
Camshaft: currently comp cam XE284
Carb: Holley 75- vac sec
Trans: 350 long nose
Gear: currently 3.42 (Will be upgrading to 3.73 or 4.10)

I do not drive my car daily, nor do I intend to. however, It is my intention to drive it to the track every now and then.

I do not care about gas mileage! Besides, If I did what Eric68 just did, (1500 mile / 5 state road race) I might as well have my bags packed when I come home - 1600 bucks for fuel?!?!!?!

I really don't care about 4.10's beating my ear drums to death while on the interstate. The track is only 30 minutes away from the house, and 1/2 of it is on an un-congested highway. I feel 3.73's are a good ALL AROUND upgrade.

I DO intend on spraying anywhere from 75 - 125 horses of nitrous later on every blue moon. (Once considered cheating in my book, but if you cant beat em... hell we ALL spray!!!)

I do not have a need for speed. Going faster and faster each year is not in my vocabulary! (Did I just say that?!?!?) I do not intend to do any major upgrades to the power plant in the car.

I want to run solid 12's on motor, and 11's on juice. I want a mean idle without having a top fuel camshaft effect. I want the ability to tune the car without having trick this and trick that, yet still pull the numbers I posted.

Was I thorough enough?

How bout runnin 11s on motor...
port the heads, stick the right cam in it, and a 750-950 DP carb,
and be done with it. Dont need no stinkin bottle;)

If you want to run a little spray I'd definately go with a dual pattern cam. Personally, I think the XE284 is pretty close to ideal as the car sits now . . . not enough potential gain to make it worth the swap IMO. If I were to swap, I'd go with the XS282s.

Leave the cam alone ;)

PS. I didn't spend anywhere near $1600 in gas . . . more like $500. I got 12 mpg on the trip.

67RS502,

I have a 750 on it now, although it is a vac secondary. I would consider a larger carb, I just dont want to get too far into carb tuning from season to season, better yet day to day. (alabama seasons go from one extreme to another with 110 heat indexes 4 months out of the year. I am getting work done to the heads without a doubt, but I do NOT have a reputable shop around these parts that I trust with doing the job right.

Eric,

I have really considered my xe284 as an option, but I really think I want something thats going to be a tad bit more aggression, and pay for it now while i'm tuning my engine and getting the true street / set up. Besides, I dont have to tell you that solid cams are the best thing since sliced bread!
;-) Therefore I feel the XS282S is my best bet for now and in the future.

By the way Eric, you never answer a brother's email any more.... wassup wit dat???

Negative posts feel free to reply....

What do you hit now?

With some bowl porting, good 10" converter and tires that hook you should be in the 11's as is.

Your compression is kinda high for iron heads, I wouldn't go any smaller with the advertised duration than you have now. Unless you are at a high elevation.

Was that negative enough?

67RS502,

By the way Eric, you never answer a brother's email any more.... wassup wit dat???



You need to email me first, then I will reply ;) try Eric_68@comcast.net

You have to get through my new superwammydyne spam blocker though . . .

But back to the cam thing. If you want more agressive the XS 282s will idle and have a similar power band to the XE284 but it will pull higher on the top end though and probably make a tad more TQ down low. Its only 4* bigger at .050 than the XE284 so it won't make a radical difference IMO.

Lonnie,

*Since my motor was virtually untuned, I never turned more than 8.3 1/8 mile and 13.1 in the 1/4.
*Stall = 3000 B&M
*Bowl blend would be prime target for my heads. would that be the same as port matching? I have a TEAM G intake.
*Elevation isn't a problem here in the plains of Alabama - the heat however is another issue all together. I just made the final cooling upgrade (shrouded fan) and it stays comfortably cooler now. Still, I never got a change to test it fully with the current cooling capacity.
*I had major carb stumble, fuel supply shortage, not properly tuned, plug issues, couldnt keep a belt on it at all. I figured it to be the balancer because I noticed a tad bit of wobble in it shortly afterwards. But the way, I currently have an "auto zone" $22.00 fuel pump. you dont think thats starving her after 5000 rpm do you?
Quote: "67 Camaro daily driver 12.06 @ 111.72mph 383/3.42's" ... Thats what IM TALKING ABOUT RIGHT THERE!!!!!! Set up please Sir?

By the way Lonnie, your negative reply is well appreciated. I never mind being told that what I'm doing is either backwards or stupic.... itls a learning experience that I am after. So I value all comments

Eric,

That little "quench" in performance is what I believe to be looking for. I am extremely squeemish about running that little duration, keeping it pump gas, and performing like a beast instead of a dog.

These little upgrades should have gone into the car in the first place. But I thought I would go step by step.... pretty silly huh?!?!

What I am looking for in the 282 grind is the "pulls hard to 6000 - 6500 rpm" effect. And Im simply not getting it. What about a 1.6 rocker upgrade?

It would never quite pull as hard as I thought it should on top end, even after the new exhaust went in! (Dual 2 1/2 Borlas cut off under the seats with H pipes) If you recall I had the standard Y pipe configuration. I went to the race-ready exhaust cutaway and dropped from 9.2 1/8 mille to 8.6 - nice, but I still wanted a litle more out of her!

....

By the way.....

If I decide NOT to spray, (which I still consider alot because I really dont wanna go under the hood more than I have to) What about a more aggresive cam on a tighter LSA - say for instance a 108 LSA?

Crane had some nice "Saturday Night Special" cams that sure looked good....

Eric,

Is that an underscore between Eric and 68 on your email address? If so that describes the email issue. I wanted to tell you how GOOD my buddies are doing based on the recommendations you gave them! They are smashing any and everybody!

Using parts from autozone is hit or miss. The pump may be a problem but when I have a pump going bad the car will fall on its face, not just loose power.

I run a holley street pump and stock 5/16 fuel line. I have a LM1 wide band oxygen sensor and it does not get lean the full 1/4.

The rest of my combo is in my website, here is a shortcut: http://www.geocities.com/lonnie67_1966/red.html

I have stock front springs, skinny little stock swaybar is hooked up. Stock weak mono leafs w/ Lakewood slappers, no gap. Cheepie gas shocks.

The reason I think you should hit 11's now is we weigh the same, you have 1 point more compression, bigger cam and heads. Your combo looks pretty good to me. Your compression seems a little high for iron head and your cam. Sure your not getting detonation? What total timing do you run?

Bowl porting is not the same as port matching, bowl porting is under the valves. Have that done first. Also you need a good torque converter, slicks and tune your carbs seconday opening speed.

Yes sir, that IS an underscore . . . ;)

Glad to hear your friend's are cleaning up. Now its your turn . . . LOL

10.7:1 is kind of on-the-edge for pump 93 and iron heads with the XS282s . . . for sure. I think it would work though if you keep the coolant temp cool, use a cool air inlet, and run a tight quench. You might have to mix in some good stuff on race day. The tighter LSA will actually build more cylinder pressure so if you are on the edge now and unwilling to mix some good stuff in on race day stay with the 110* LSA.

A real sweet cam if you have a strong stomach is the XS294s on a 108* LSA. That will pull to nearly 7000 and should be OK on pump 93 with your iron heads. Your SPII heads may start to peter out over about 6500 anyway so it might not be worth the effort.

Hope that helps

Have you considered a Z-27, Z-30 or Z-35, Isky solid cam??

I figure any one of them should do you nicely, imho!!

Old-school, but I figure in your motor, just fine!!

pdq67