BC cam options and your opinions

[RC_slow_dsm]

Ok so I just rebuilt my motor and it has a fresh 550 miles on it with no problems other than an oil leak. The rebuild consists of a 7 bolt with squirters plugged, Eagle rods, Ross 8.3cr pistons, all ARP hardware. The head is stock and i'm running a 60-1 ball bearing 60trim on 16psi for the break in only. After the motor is well broken in I will be running the 60-1 to 35-38psi. I have a stock head for now but I am wondering which cam setup will be best for me.

I have had my eye set on BC 280's since they came out, mainly because of pricing and availability. My question would be will the 280's properly support 38psi out of a 60 trim or would it be possible to upgrade to the 288's for better flow? can i mix and match a 280/288 combo? how big of a power gain can i expect going from 280's to 288s? Does anyone know how rough of an idle the 288's dish out? I'm a little worried about it because I run E85 so my idle sucks period, also im on a 1g throttle body and i'm on my 3rd IAC motor which also doesn't work.

A little more info on my head; im running a cometic head gasket and a stock intake manifold. i'm planning on a JMF SMIM before I get the cams, a 3 angle valve job, and a moderate port job. Before I decide on these porting options, i want them to comply with my cams of choice. Also, this car is a top end FWD looking for power in the 600-700whp range after head work. which cams are best for me?

 

[Boost92awd]

I would go with the 280's, as they are a pretty big cam. Those will be good for your goals. I wouldnt suggest going to 288's untill you got a real big turbo, ex. 35r,42r, something along those lines, 288's are a huge cam. The 280 will help with traction also, makeing it spool up slower. But your not going to get 600-700hp on a 60-1.

 

[NOSLO2PT0]

The head is stock and i'm running a 60-1 ball bearing 60trim on 16psi for the break in only. After the motor is well broken in I will be running the 60-1 to 35-38psi.

I have had my eye set on BC 280's since they came out, mainly because of pricing and availability. My question would be will the 280's properly support 38psi out of a 60 trim or would it be possible to upgrade to the 288's for better flow? can i mix and match a 280/288 combo? how big of a power gain can i expect going from 280's to 288s? Does anyone know how rough of an idle the 288's dish out? I'm a little worried about it because I run E85 so my idle sucks period, also im on a 1g throttle body and i'm on my 3rd IAC motor which also doesn't work.

A little more info on my head; im running a cometic head gasket and a stock intake manifold. i'm planning on a JMF SMIM before I get the cams, a 3 angle valve job, and a moderate port job. Before I decide on these porting options, i want them to comply with my cams of choice. Also, this car is a top end FWD looking for power in the 600-700whp range after head work. which cams are best for me?

I highly doubt the 60-1 will support 35-38psi with ANY sort of efficiency. Probably make the most HP around 30-32psi. With a smaller turbo like that, I'd go with a 272 cam setup. FP2's or BC 272s have great idle quality, but still offer good top end power. I seriously don't think you will benefit from a 280 cam with only a 60-1. That turbo already spools up horribly slow. A larger cam will only make it worse.

As far as your 6-700whp goal, you better slap some nitrous on the car. That 60-1 isn't gonna get you there by itself.

 

[NOSLO2PT0]

I wouldnt suggest going to 288's untill you got a real big turbo, ex. 35r,42r, something along those lines.

That's like comparing our 2.0L to a 6.0L LS2. They aren't even in the same league of turbos.

 

[anisbeth]

I highly doubt the 60-1 will support 35-38psi with ANY sort of efficiency. Probably make the most HP around 30-32psi. With a smaller turbo like that, I'd go with a 272 cam setup. FP2's or BC 272s have great idle quality, but still offer good top end power. I seriously don't think you will benefit from a 280 cam with only a 60-1. That turbo already spools up horribly slow. A larger cam will only make it worse.

As far as your 6-700whp goal, you better slap some nitrous on the car. That 60-1 isn't gonna get you there by itself.

+1 on this opinion. 272 are street/strip cams. It'll give a good idle even at stock setting, spool that 60-1 turbo faster, and provide great top end power (track) well into the 500hp+ range.

 

[dSmgs-T]

x3 on 272's, 280's are too big for that turbo.

 

[snox135]

272's will support 700 whp. Check out twicks69 profile on here. He has 272's and over 700 whp/ almost 700ft./lbs torque.

 

[NOSLO2PT0]

272's will support 700 whp. Check out twicks69 profile on here. He has 272's and over 700 whp/ almost 700ft./lbs torque.

So will stock cams, if given a big enough turbo. Bigger turbos should have bigger cams, to allow the engine to breathe better. However, in this case, I wouldn't even bother thinking about 280's until you get into the T67 or larger turbos (think 70+ lb/hr turbos).

 

[snox135]

So will stock cams, if given a big enough turbo. Bigger turbos should have bigger cams, to allow the engine to breathe better. However, in this case, I wouldn't even bother thinking about 280's until you get into the T67 or larger turbos (think 70+ lb/hr turbos).

I highly doubt you will ever get 700whp from stock cams. I understand your point, but there are alot of people on here that have too big of cams for there set up. Have you looked at twicks dyno chart? His power curve is awesome. Could he make more power with bigger cams? Probably but he would lose some of that power curve..

 

[JayRolla]

I would go with the 280's if I was you. The 60-1 may be a little small but the cams will give you a lot of top end. Also if you upgrade your turbo to a something that does flow 70+lb/hr later on you wont have to upgrade the cam again. And looking at your goal of 600+whp you may think about upgrading soon.

If you decide to stay with the turbo then 272's will be fine. I know someone here in the rocky mountain air making 550whp uncorrected on a t67 and 272's. He was going to upgrade to 280's but went with a smaller exhaust housing on the turbo to help spool and thinks that will give him better performance over upgrading the cams.

 

[RC_slow_dsm]

Thanks for all the feedback. I was told this turbo would support around 35psi on e85 but maybe i was given false information. Ruling out the 288's until i get a larger turbo, do you think 272/280 would be a good combo? i don't think straight 272's will cut it, also as pointed out i don't need to spool the turbo at lower RPM so larger cams will help with more top end power which was the reason I was leaning towards 280's as apposed to 272's in the first place. As for the idling issue, I'm going to have to make some sort of sacrafice making big power on a street car. Maybe trying another IAC motor will help, but my idle as of now is complete crap. a little more effort in tuning the idle.

Also along with these cams I will be running up to a 100 shot on top of the boost to make the power I desire. Will either of these cams make a difference regarding the nitrous? What size turbo would you guys recommend upgrading from a 60-1 while still being a streetable car?

 

[NOSLO2PT0]

What size turbo would you guys recommend upgrading from a 60-1 while still being a streetable car?

I personally run an FP3065 turbo on my car for now. I think that's the perfect turbo setup for a street car. A good GT35R would do even better. Nothing wrong with driving to the track, clicking off some mid 10's on street tires, then driving home. That's what I call a street car!!!

 

[RC_slow_dsm]

mid 10s would be nice but i'm FWD... i'll need more work than you guys to actually get traction. It would be almost more worth it to do an AWD conversion.. So nobody things the 272/280 combo would be a good idea?

 

[NOSLO2PT0]

So nobody things the 272/280 combo would be a good idea?

No. That was cool back in 2000.