ariba

Hello
I would like to upgrad my new Chevrolet Performance crate 350/290 HP
with a better cam I do see a lot of people are using comp 12-210-2
Does it gain more Horsepower If you know the approximate numbers I will be thankful. or a better one mabe 12-212-2?
I am looking for a street car with Ac. But I looking to gain more H.P
I am considering to change in the future Dart Heads + Edelbrock Performer RPM Air-Gap Intake Manifolds 7501. But if you have a better advice you can let me know.

I hope I will be in the 400-450 HP
I have in my car now Edelbrock 2101 Intake Manifold + Black ceramic Hooker Headers + MSD Ignition 85551K + Hooker 16526HKR + Flowmaster Super 44 + 600 holley

I think the cam thats comes with my now engine is 3896962

71VetteLover

Be aware the more cam you put into it the lower your rear gears need to be to keep the engine's rpm in the cam's elevated power band.

resdoggie

Best advice? Get a roller cam with more duration and lift to reach your HP goal.

cv67

thats not a bad street cam at all but youre a long ways from 400 even with heads/intake. ..what you got to spend to get there?

HeadsU.P.

Comps 12-212-2 needs:
1. Higher compression, 9.5+
2. Stall speed of 2500+ torque converter.
3. Lower rear gears.
Do you have all that?
I had that cam for several yrs. But it was with 9.8 CR, 3,000 stall and 4:11 rear. It did well, then I moved on to bigger / better.

Domobomb

You can get close to your 400-450hp goal, but you basically need a whole new top end.

Hotrod did an article where they took the 350/290 you have and were able to make 381 hp / 403 lbft torque with headers, intake, cam, heads, roller rockers.

http://www.hotrod.com/articles/35029...engine-part-2/

And in part 3 they made 431 hp / 424 ft lb torque with a retrofit roller cam.

http://www.hotrod.com/articles/35029...engine-part-3/

And as others have mentioned you'll need huge stall and gears. Prob not so nice on the street as a daily.

Knerf

why not get one of these?

for the money you cant go wrong if you have the intake carb and dist. already. if you dont the full dressed one is only $700 more

edit: i may have misread, you already bought the crate motor.

ariba

Thanks
So 3.73 is it better or my stock 3.08?

ariba

Thanks
do you have one on mind or a part #

ariba

If I didn't bought my engine I could bought the blue print and saved myself a headache

68post

Consider AFR 180cc heads purchased with the chambers milled to 60cc, and with roller springs. Comp sells a roller cam with .500" lift and 215* duration @ .050. 12-220-8 #270HR.

You should have compression up to approx 9.0-1/or 9.3-1, so you still only need 87 octane with AL heads, but a nice bump and a tremendous flow increase.

You won't need any more duration unless you're looking for more power above approx 6,000 rpm.

You can change the rear gears and add a stall to find a big boost too !


edit: you can also purchase Dart Iron Eagle heads (180cc or 200cc) with 49cc chambers.

Dynra Rockets

Better for what intended purpose and what transmission and what tire diameter?

Given those two choices, and assuming you want low speed acceleration and not low cruising rpm/gas mileage, the 3.73.

resdoggie

Here's what I have.

HeadsU.P.

Never take "cam selection advice" from anyone but cam company tech people. You are not selecting wheels or tires or headers that requires very broad information. Cam selection involves 18-22 very specific tech questions that only you can answer.

JoeMinnesota

Resdog - Curious - did you dyno your motor before chassis dyno? Wondering what the losses are. My new 355 made 391/413 on the engine dyno and now in the car. 4spd? How's that with the 4.11's? I'm thinking 3.70 instead of my 3.36.

The OP will want a solid 9.7 or 10:1 to make that 400+ hp with the cubes. I also went roller and love it now that it is sorted... the smaller Howard's retro 224/231@50 and .500/.510 lift. It's a nice street tq curve and pretty much done at 5800 rpm.

ariba

What was the approximate total cost?

ariba

I forgot to mention
my trans is turbo 350 with a new B&M 20400 Tork Master 2000 Torque Converter 1900 - 2100 RPM

ariba

I wanna thank Knerf
He mentioned Blueprint 383

http://www.blueprintengines.com/inde...base-bp3834ct1

Blueprint 383 VS my GM crate 350/290 upgraded

If we compared PRICE$$ in me upgrading Cam set+ heads + Intake manifold

Heads AFR or Dart 180 will cost me about $1500
Comp cam set about $250
Edelbrock Performer RPM Intake Manifolds about $250 but keep in mind Blue print dont have a intake.
+ installing I am not that professional to install we can say $500 less or more for installing. Please correct me if am wrong.
So the total is $2500 if I am upgrading my new engine. After All of that I will be in the range of 380 HP!!?...
so is it better to just Buy a Blue Print engine and sell my new GM Crate 350/290???

The price of my new 350/290 was $2300 if we want to upgrade it all pay $2500
So it's
$4800 = 380 HP VS Blueprint 383 $3750 = 420 HP

Need an expert advice

68post

Not an expert , but an experienced enthusiast.
AFR may well be more expensive than $1,500, and Dart less. Iron Eagle heads can be bought for around a $1,000 or less.
You should really consider using a roller cam if you can swing it, it will make achieving 400 hp much easier within your current shortblock, (if that is what happens after all).
Of course this will add $$ to the cam and lifters. If you don't have alot of experience - a hyd roller cam setup will be much easier to maintain vs a flat tappet setup and their special oil needs !

Domobomb

Another option for you: https://www.yearone.com/Product/1967-81-camaro/ct350pc1

$3200, 400hp, has a roller cam and includes an intake.

They have one with aluminum heads too if you want the weight savings for an extra $500.