What Will It Run?

[ksurfer2]

For additional info, here is the cam card.

 

[440rb]

Hughes version

 

[PRHeads]

To run a cam in the duration range of what the OP has, I’d really want to have 165lbs on the compression tester......as the minimum.

My catalog showed 322 advertised duration for that cam...... which is what I used in the calculator.
At 318 the IVC closing point would be 2deg earlier, which would have made the calculated number of 135psi go up a tad.

I was using a c/l of 104deg for my results.

 

[PRHeads]

I didn’t see it mentioned anywhere........
What size are the headers, and is there an exhaust system in use as well?

 

[ksurfer2]

Another move in the right direction on Thursday night. I went 10.937 twice. That would have been a new best, but my last run of the night was even better. A couple of upgrades since the last passes. I removed the mechanical water pump and replaced it with a Mezierre electric pump (I really like how quick the car cools down between runs now). I also changed the accelarator pump nozzles from 33's to 45's.

RT. .012
60' 1.489
330 4.393
1/8. 6.879
mph 98.47
1000 9.048
1/4. 10.905
mph. 121.11

 

[NSS Guy]

Another move in the right direction on Thursday night. I went 10.937 twice. That would have been a new best, but my last run of the night was even better. A couple of upgrades since the last passes. I removed the mechanical water pump and replaced it with a Mezierre electric pump (I really like how quick the car cools down between runs now). I also changed the accelarator pump nozzles from 33's to 45's.

RT. .012
60' 1.489
330 4.393
1/8. 6.879
mph 98.47
1000 9.048
1/4. 10.905
mph. 121.11

60ft has really improved, wonder if it's mostly from the larger nozzles?
Good job. You've got the 11.00 index covered now, should be fun

 

[PRHeads]

A 10.905 with a speed of 121.11 still lines up very well on the Moroso “slide rule”.

 

[440rb]

Well it is what it is, it runs well, consistent, can run 11.0 index, has a good 60ft (1.48=10.68) for a 10.90et so not taking anything away from it, except that as I may have said prior as an example my old '69 440-6 Cuda which was only around 100lbs lighter ran 10.7@125 with an all iron 440@less than 10:1, with a single 850DP and it didn't 60 as good as yours with the then tyre knowledge we had, not a 512 with ally heads, more comp, more carb and a similar sft cam. The car should be in the 10.3>10.4's@128+ or better, I can't see whats holding it back after all these posts. But good luck with it I'm sure your having fun.

 

[ksurfer2]

I can't see whats holding it back after all these posts.

There is at least 2 tenths tied up in the idiot that drives the car, and probably another 2 tenths because of the same idiots inability to properly tune the car...put those together and I am getting close to your predicted 10.40's!

More seat time in the car, and more time pestering some of the extremely helpful (and patient) folks both on this site and at the NMCA events may help me get to the car's true potential.

 

[PRHeads]

At least so far....... the car isn’t running a fast enough speed to indicate there is much left for ET.
The speed is the better indicator for “power”....... and right now...... the speed is saying you’re power is good for about 10.90’s.

A 10.50 needs more like 126.5mph speed....... or, another 65hp at 3400lbs.

 

[Gunner1]

I’d be tickled to death if I could someday get my car this fast.

 

[dvw]

You've already picked up quite a bit with your same basic engine combo. I do not think where is much more left without engine changes. For someone to say it should be quicker ? But what is the valve job like? Port prep? Is it actually 10.5-1? Or is that a perceived number? Where is the cam actually installed? You are now at a crossroads. Run it as is. Or hop the motor up. How much? My bet is a 440-25 Indy intake, more compression, bigger cam, and some good port/valve job work would put it in the 9's.
Doug

 

[ksurfer2]

You've already picked up quite a bit with your same basic engine combo. I do not think where is much more left without engine changes. For someone to say it should be quicker ? But what is the valve job like? Port prep? Is it actually 10.5-1? Or is that a perceived number? Where is the cam actually installed? You are now at a crossroads. Run it as is. Or hop the motor up. How much? My bet is a 440-25 Indy intake, more compression, bigger cam, and some good port/valve job work would put it in the 9's.
Doug

I think it may be pretty close to it's potential. I do still think there is some left in it due mostly to my inexperience. My short(ish) term goal is to run the 10.50 index. A cam swap will be coming within the next couple of months and while it is torn down for that, Maybe some head work as well. I hope that will get me where I want to be. Long term....a total teardown, and build for the 10.00 index. The cross ram will stay. That will need to by pried from my cold dead hands!

 

[440rb]

You've already picked up quite a bit with your same basic engine combo. I do not think where is much more left without engine changes. For someone to say it should be quicker ? But what is the valve job like? Port prep? Is it actually 10.5-1? Or is that a perceived number? Where is the cam actually installed? You are now at a crossroads. Run it as is. Or hop the motor up. How much? My bet is a 440-25 Indy intake, more compression, bigger cam, and some good port/valve job work would put it in the 9's.
Doug

Ok so now we are getting somewhere with Doug's comments, and its what I've been trying to get across in previous posts. There is no way I can see a 512 with MW heads/intake and 1500cfm of carb at 10.5:1 making a poor 519fwhp on track to go 121mph@3400lbs.
The only clue as to whats up currently is the 110-130psi c/pressure. So, as said, either keep at it with what it is and get to know the car well but it ain't going any much faster the way it is, thats mostly all its got I reckon. The 60 is showing that it has another 2>3 10ths ET in it but the hp is not there with that tune after the initial hit.
So either take it apart and see whats up and depending on what you find wrong put it right and go mid to low 10's or do what Doug says and its a 100% 9 sec car, how far into it depends on parts used of course but it could look something like this at 750hp with your 4.30's/30"tyre>
60 Foot E.T. : 1.34 Seconds
1/8 Mile E.T. : 6.08 Seconds
1/8 Mile Trap Speed : 111.74 MPH
1/4 Mile E.T. : 9.64 Seconds
1/4 Mile Trap Speed : 139 MPH
1/4 Mile Trap RPM : 6,699 RPM+ and that rpm would suit a better cammed motor with more comp and better flowing heads.

 

[dvw]

I loved my cross ram. But to make 9 second power with one isn't easy. It can be done. Hitting the 10.25 index with enough room to spare would be a good achievement. It certainly looks like it needs more compression as a starter.
Doug

 

[PRHeads]

It certainly looks like it needs more compression as a starter.

I agree.
Or..... at least more(way more) cranking compression.

I loved my cross ram. But to make 9 second power with one isn't easy.

Didn’t you dyno test one?

I tested a 499 that had one, with ported 440-1’s and a basic bracket race roller cam. I don’t recall the CR, but it had flat top pistons.
Untouched intake manifold...... made 642tq/671hp.
3650-ish pound car.... was running mid-10’s as I recall.

Edit- after doing some digging...... It appears the car that 499 went in ran 10.30’s@ around 130 with the stock cross ram on it.

 

[biomedtechguy]

The cross ram will stay. That will need to by pried from my cold dead hands!

I "get" that, and for now, feel the same way about my 6bbl carbs, but the Indy ModMan CNCd to MW port size for the TF 270s is the starting point for my 572. If I ever wanted more carb, I'd be looking at the Indy 440-25 or a cross ram, just for the "cool" factor when the hood is open, and that is how I use my car more than best track times. Besides, the size of the engine at 572 has got to make up for some other "compromises".
Enjoying your thread, have fun!

 

[NSS Guy]

I agree.
Or..... at least more(way more) cranking compression.


Didn’t you dyno test one?

I tested a 499 that had one, with ported 440-1’s and a basic bracket race roller cam. I don’t recall the CR, but it had flat top pistons.
Untouched intake manifold...... made 642tq/671hp.
3650-ish pound car.... was running mid-10’s as I recall.

Edit- after doing some digging...... It appears the car that 499 went in ran 10.30’s@ around 130 with the stock cross ram on it.

My combo is back on page 4 #63. I run TTI 3" X-Pipe and magnaflow mufflers 99.9% of the time not trying to set any personal best, just seeing what changes pick the car up and how much. This time slip was with 50lbs of ballast. Low maintenance car. I had the tranny freshened this winter and ATI check the converter, only needed a bearing and race replaced kept same stall. I am going out this Saturday for TnT so we'll see if any of helps.

 

[PRHeads]

Good numbers.
Stock x-ram?
What’s the cam?
Heads?

 

[NSS Guy]

Good numbers.
Stock x-ram? Yes
What’s the cam? Comp roller R1 from Indy 272/276 .620
Heads?

Little EZ 295