Cam removal in an ERA/FE

[blykins]

There is a category for both manifolds with the same carb.

So with the Performer RPM, 632 hp and 592 tq. With the Victor, 650 and 594 with the same 1000 cfm carburetor.

However, look at the average horsepower and torque.

Performer RPM - 521 hp and 552 torque.

Victor - 513 hp and 538 torque.

Now, which do you think would pose a better situation in a car that spends most of its time around 2500-3000 rpm?

At 3000 rpm, the Victor is making 284 hp and 497 lb-ft, where the Performer is making 305 hp and 533 lb-ft.

Another thing that the dyno does not show is throttle response....

[lippy]

Thanks Dan! The Performer RPM peaks at far lower revs. 3000 or so. The Victor is in the 5000's, which is what I want. It just doesn't need to be 6600, which is what I have now.

Edit: Brent corrected me. The Performer appears to be better up to about 6k

[DanEC]

Originally Posted by blykins

There is a category for both manifolds with the same carb.

So with the Performer RPM, 632 hp and 592 tq. With the Victor, 650 and 594 with the same 1000 cfm carburetor.

However, look at the average horsepower and torque.

Performer RPM - 521 hp and 552 torque.

Victor - 513 hp and 538 torque.

Now, which do you think would pose a better situation in a car that spends most of its time around 2500-3000 rpm?

At 3000 rpm, the Victor is making 284 hp and 497 lb-ft, where the Performer is making 305 hp and 533 lb-ft.

Another thing that the dyno does not show is throttle response....

Brent - what's your opinion from your experience, of which manifold would work best based on what Lippy is trying to accomplish? I don't have a dog in this hunt but it's an interesting subject. Most people are looking for more power, more rpm, etc instead of trying to pull it back a little.

[blykins]

I think Lippy is wanting a "hybrid": a mixture of something that is agile down low and still makes some higher rpm hp.

In all reality, I think a Performer RPM with a 1" Super Sucker would probably meet his needs fully.

His intake has been ported every way from Sunday and is designed for a 490 inch engine that will make hp to 7000 rpm. It's big. In my mind, a Performer RPM would at least match (if not excel) the current Victor's performance up through the rpms he has in mind, but have much better throttle response while driving at cruising speed.

[patrickt]

Originally Posted by blykins

I think Lippy is wanting a "hybrid": a mixture of something that is agile down low and still makes some higher rpm hp.

And what are you doing to his heads, that were, presumably, pretty robust to begin with.

[blykins]

As I mentioned earlier in the post, we were experiencing accelerated guide wear.

[patrickt]

Originally Posted by blykins

As I mentioned earlier in the post, we were experiencing accelerated guide wear.

...yes, and you plan to do what?

[blykins]

Change the alternator belt.

[DanEC]

Originally Posted by blykins

change the alternator belt.

:lol::lol:

[patrickt]

Originally Posted by blykins

Change the alternator belt.

Hmmm, you must have cabin fever.

[blykins]

No, I just don't know what you're getting at.

The valve guides are worn, so I'm replacing the valve guides and seals. What else would I do?

Since he's changing cams, I'll be changing valve springs now too.

[patrickt]

Originally Posted by blykins

No, I just don't know what you're getting at.

Naaah, you're seeing shadows.

[blykins]

Waxing philosophically now?

I truly don't know what you're getting at. You presumed I was doing head work but I said that we were fighting valve guide wear, so you asked what I was going to do next. I thought it was very self-explanatory.

[patrickt]

Well, popping out a guide isn't all that interesting. Novel head work would have made for better waxing.

[Bernica]

Wait a minute. I'm sure I am missing something here...
Brent, if you already have the heads can't you match them up to whatever manifold he wants?

[Dimis]

Brent & Lippy,

Can I make a suggestion here... Perhaps consider Blue Thunder's Dual plane (Dual quad) MR intake?



From my understanding (Jay Browns book and a little research), that may be one intake that balances all the areas you are trying to cover.
Dual plane should allow for TQ down low at cruise speeds, & Dual quads are just darn cool!

[lippy]

Dimis,
The Blue Thunder may be an option, but I want to stay with a single 4 barrel. I've heard they flow really well and the build quality is excellent. Not sure if they are easy to find in stock.

[blykins]

Blue Thunder products can be a pain in the booty to get. I've had to wait months on intake manifolds before.

The BT MR intake certainly is a higher quality product as far as cosmetics go. The aluminum is prepped differently giving it a different look than the standard issue Edelbrock stuff. The BT piece looks like a Sidewinder intake and has provisions for an oil fill tube (even comes with one).

Out of the box, I don't think I'd give much of a nod performance-wise to either the BT or the RPM. They both have a high potential when being professionally ported.

As far as pricing, for the price of the BT, you could have an RPM, an aluminum 1" Super Sucker spacer, and have enough left over for a steak dinner.

[undy]

As far as the worn guides, do you think it was a geometry problem causing excessive side loading? I ask because replacing guides doesn't necessarily fix the problem, just bandaids the symptom. What are you doing to eliminate the possibility of future premature guide wear? Your thoughts??

[blykins]

Valve guide wear was not a geometry problem.