bb489

This is what I am currently building and would lika a cam recommendation:

454 BBC (4.25 stroke, 4.28 bore= 489 ci)
ported 049 heads (2.19/1.88 valves)
9.5-10.1 compression
RPM air gap manifold
850 mighty demon carb
2700 lb camaro 1968 (without engine)
th 350 (may change to th 400 if needed)
2800 stall
3.73 eaton posi
full length headers with 2 inch primaries

So far I've called crane and comp and got two different recs. The more info I read, the more confused I get!! This will mainly be a street bruiser with occasional street time. I'm looking for a torque monster that runs tough and sounds tough! Comp rec. the 288 XR 236/242 at .050 inch .521/.540 and crane offered the same duration with .610/.632 lift. What do you think of these two or is there a better option for my application? What will be the best duration/lift combo for this application? Thanks guys.

CTSV05

Please note, I'm a sb guy, but.....I would prolly go with the bigger lift cam.

Duration and lobe center determine manners, so you want to open the valves as much as possible on a low duration cam.

bb489

Would I be better off going with a longer duration cam with less lift to ease up on the valve train some. If I went with a longer duration cam with less lift, would I notci a power/torque difference vs a cam with less duration and more lift?

foxspy

iTrader: (1)

I have run the XE288HR in my 502", it sounded good. It doesn't rev past 5800rpm though. I was running a 3000stall in my 4400lb truck and was running 8.0s@86mph in the 1/8th.

I am now running the XE294HR and running mid 7.70s@91mph w/ a 3200stall. It'll rev up to 6200rpm, but power falls quickly after 5800rpm.

Both cams are very streetable.

bb489

How does that 294 idle?.. Does it sound good, lopey? I thought about getting that one for my 489. I don't plan on reving past 6000 though.

blue66

Are you limited to hydraulic, or is roller an option?
I run a solid roller, 244 @ 050, duration, and .644 lift.
Shift it at 5800 and street drive no probs, sounds sweet.
454 bbc, 3500#'s 11.40's pump gas......same heads, 950 carb, 9.6:1 comp, single plane intake. 3000 stall, and 2" headers.

Flamed_Chevelle

iTrader: (3)

I have a 498, and I run a hyd roller lunati, 245/255 600/612 on 110lsa, and it's bad ***!! Idles around 1100 and sounds mean, mine's not an everyday driver, but more of a street car than drag car. a guy in Fl I know built a 498 just like mine, proted 049's 2.19/1.88, 10.2:1, airgap, and a 750. his cam was bit smaller though 230 @ .050 & 575 lift hyd roller... he made 580 hp @ 5200 & 624 ftlbs @ 4000!!! he had 524 ftlbs @ 2500!!! can you say torque pig I'd expect somewhere in that range if you go roller and mid-high 11's in that car if you hook up

bb489

Yeah, if I could get those numbers I'd be very happy!!! What sized carb are you running and what compression you got? Do you run on pump gas or race fuel? Mine won't be an everyday driver either, but I'll take it out several times a week and to car shows and to the strip now and then. In your opinion, what do you think is the max duration and lift I should/could run to make a very strong, reliable street performer? My engine will be a 489 though, and not a 498. Thanks for the info in advance.

CTSV05

Well, your parts list is pretty mild, so I wouldn't get too big on the duration, but personally I like a big cam, but the amount of stall you'll want to live with, is going to determine your cam choice.

foxspy

iTrader: (1)

My setup:

502"
10.2:1 compression
GMPP 290cc oval aluminum heads (105cc)
Comp XE294HR
Accel Single Plane intake
1000cfm TB
FAST ecu
2" headers w/ 3" dual exhuast, X pipe

I made 490rwhp@5800rpm and 622ft/lbs@3300rpm.

Here is a video of the XE294HR w/ open headers.

Here is a video of me at the track w/ full exhaust.

bb489

Wow. That truck sounds mean idling in your driveway! Is that the 294 cam? And I see a lot of guys are runnig big (1000 cfm) carbs on these engines. How are these carbs on the street? Also, how is your torque on the low end (1800-2500 rpm)? Thanks

bb489

This is for Blue66. I heard that its not a good idea to run a solid cam on a mainly steet driven car because of issues with the roller lifters not getting enough oil (below 3000 rpm)? I am going to run a roller cam and have seen many solids that have the duration and lift I want, but I am kind of skittish getting one if I may have problems with it. What are your thoughts?

foxspy

iTrader: (1)

Yes, it's the 294. I am running a 1000cfm throttle body w/ fuel injection, no carbs here. I can idle at 650rpm all day long. I have a 3200 stall so I don't see any torque numbers below that.

CTSV05

Not bad for a dump truck motor!!!!!

I'm kidding, I'm kidding........I'm obligated to harass BB guys!!!!!

blue66

Well, I have heard those horror stories too, so far no problems, this will be 3rd year on engine, bracket raced every weekend and driven in between. Has a ton of idle time on it, I built the entire engine myself as I have several others. I change the oil and put gas in it. Up until I blew the spiders out of my 12 bolt, It has been a maintenace free combo. Just the way I like it!!!
Also I do not run a huge pressure solid roller spring, it is a hyraulic roller spring, which will do just fine unless you plan on spinning it 6500 plus.
I have run mine to 6500 but will not ET any less than if I shift it @ 5800, so why spin it. Any questions let me know. I will try to help you out. Or email @ blue66@highstream.net

FastRedChevy

Im putting a very similar set up toghether right now for my 88 pickup truck.

heres what im im doing
-489 ci
-longer 6.375 rods
-around 10.5:1 compression
-fully ported 781 heads with Manley severe duty 2.19 1.88 valves using smaller 11/32 stems dont have any flow number yet cause there not done we are expecting around 320 cfm wich should be a piece of cake.
-comp xr288 soild roller street cam 248*/254* duration with 653"/660" lift using edure-x lifters
-roller rockers, might with Jesel sportsman shaft rocker system
-Vic Jr oval port intake
-Mighty Demon 850 carb.

im hoping for 11's this is going into a 4300lbs truck

pwr2w8

damn that thing sounds mean!!!

pwr2w8

I've heard of using a tool to notch the side of the lifter bore to make a path for the oil to travel directly onto the lobe before it gets to the tappet. Not sure if it actually works but sounds like it might be cheap insurance.

As for the cam lift, I would say go with the higher lift, bacause if the car won't see that many street miles then I don't think you should be too concerned with valvetrain wear. Besides, for a bb .600 isn't THAT much lift so go for it.