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Re: Advice for heads. [Re: correctdirection] #1748775
02/09/15 11:02 AM
02/09/15 11:02 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Before you start spending money its time to start
eliminating other possibilities ... hows the fuel
system.. does the pressure hold and does it have enough
flow(do the fill the gal bucket test)

Re: Advice for heads. [Re: 1DGEMAN] #1748776
02/09/15 07:03 PM
02/09/15 07:03 PM
Joined: Sep 2010
Posts: 170
renton , washington
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perfmachst Offline
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Quote:

The point I was trying to make is the car should be quicker. It is a common mistake to think you need more HP when you need to refine what you have. Either his tune up is way off or his chassis or drive train is inefficient. Cab we raced together in the old days. I was there when you got tossed for sanblasted ports in your Hemi stocker. I have never had more than 15k invested in one of my cars and have set numerous records in Stock.


hello, figures most guys that cheat, are not fast!! they spend lots of money to try go faster. you're right about cost on a older stocker. thanks.

Re: Advice for heads. [Re: MR_P_BODY] #1748777
02/09/15 07:10 PM
02/09/15 07:10 PM
Joined: Oct 2008
Posts: 411
Harleysville, PA USA
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Tommy D Offline
mopar
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Harleysville, PA USA
I'd think a cam with as much lift as the one listed in the OP would want some RPM in order to work correctly. With a 29.5" tire, and 4.10 gears, I'd think a gear change is in order. If you have an 8 3/4 rear, borrow a set from your buddies and give it a shot. Converter could be hurting you too. What kind of car and what weight are we talking? I did not see it in the OP. WHat's the 60'? Ultimately, most heavy cars need to get going quickly in order to ET well. Think about the earlier-mentioned stockers. They run 4.88 or 5.13 gears...or more. They 60' very well, and typically will run a much better ET/MPH than a bracket car would. (Much slower MPH for the ET they run) They're typically very well sorted, and will RPM much higher than a bracket racer would want. The additional gear needed to get you the ET numbers you want may also play havoc on consistency. (What you gain in ET...you lose in potential-tire-spin, possibly losing you the race.) Remember that in bracket racing, the less the combination changes, the more information you have on your combination. All of this information, if logged correctly, and referenced often, is what winning bracket racers use as their bible...or so i was told: )

Re: Advice for heads. [Re: Tommy D] #1748778
02/09/15 07:12 PM
02/09/15 07:12 PM
Joined: Oct 2008
Posts: 411
Harleysville, PA USA
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Tommy D Offline
mopar
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OK...just re-read the OP. I see it's a Dart. What weight and converter?

Re: Advice for heads. [Re: 1DGEMAN] #1748779
02/09/15 07:13 PM
02/09/15 07:13 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
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Val-haul-ass... eventually
Quote:

Cab we raced together in the old days. I was there when you got tossed for sanblasted ports in your Hemi stocker.




Re: Advice for heads. [Re: BradH] #1748780
02/09/15 07:51 PM
02/09/15 07:51 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Quote:

Quote:

Cab we raced together in the old days. I was there when you got tossed for sanblasted ports in your Hemi stocker.








Thats not cheating... he just got caught .. LOL...
IMO all the stockers are playing some kind of game

Re: Advice for heads. [Re: Tommy D] #1748781
02/09/15 09:29 PM
02/09/15 09:29 PM
Joined: Jan 2003
Posts: 31,046
Oregon
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AndyF Offline
I Win
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Posts: 31,046
Oregon
'68 Dart bracket racer with a big block should be what, 3400 lbs or so?

600 hp should be easy with a 500 inch engine that has decent compression and normal back yard tune up.

600 hp and 3400 lbs is 10.40 @ 130 mph according to my little calculator.

So I'm guessing that the tune is way wrong, or the fuel line isn't feeding the engine, or the plug wires aren't hooked up to the right plugs or something like that.

Re: Advice for heads. [Re: AndyF] #1748782
02/09/15 09:32 PM
02/09/15 09:32 PM
Joined: Jan 2003
Posts: 31,046
Oregon
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AndyF Offline
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Oregon
3500 lbs at 550 hp is 10.80 at 125 mph. Which is almost exactly what my buddy ran with his '72 Duster. That 400 engine was dynoed at 550 hp and even with street tires and full exhaust he ran 10.90 at 123 in good air.

Re: Advice for heads. [Re: 1DGEMAN] #1748783
02/09/15 10:01 PM
02/09/15 10:01 PM
Joined: Aug 2003
Posts: 43,218
Bend,OR USA
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Cab_Burge Offline
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Posts: 43,218
Bend,OR USA
Quote:

The point I was trying to make is the car should be quicker. It is a common mistake to think you need more HP when you need to refine what you have. Either his tune up is way off or his chassis or drive train is inefficient. Cab we raced together in the old days. I was there when you got tossed for sanblasted ports in your Hemi stocker. I have never had more than 15k invested in one of my cars and have set numerous records in Stock.


Dude, that was a long time ago I think that was 1974 or 1975, which year do you remember it as? We both must be older now than then You know what I've heard is if you live long enough you will get old I got tossed at that race, the only time I or anybody else I was associated with on any NHRA class race cars, was for having the intake manifold bead blasted on the inside I had built that car in three months and knew I needed to change that intake manifold and new car bugs got to me bad enough that I forgot until I was in the barn for tear down and at the intake and carb. bench and the NHRA tech, siad "Man, that is really pretty job on the bead blasting I would have been tossed at that race anyways do to having the worng carb. part numbers on that motor, it had a set of 1968 Hemi automatic carbs instead of the 1970/71 street stick shift carbs on that 1970 Hemi Cuda. NHRA had change the carb. rules and I misundersood that rule, you could ues later carbs. on a early motor but not the opposite No early carbs on later model motors
BTW, which class and car where you with? I did end up winning J/S several years later and got through tear down like we did with Steve and Linda Myers Pink Panther 1968 Hemi GTX in either 1973 or 1974, CRS I agree on gremlins and problems on race cars, they're are a lot of them Another thing a lot of racers forget is someone elses cars performance at a different track some where else in the country can't(shouldn't be) be compared to your car unless your there that day running in the same session

Last edited by Cab_Burge; 02/10/15 12:57 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Advice for heads. [Re: Cab_Burge] #1748784
02/09/15 11:59 PM
02/09/15 11:59 PM
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
493_DART Offline
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Worst Weather USA
you can lose a ton of ET if your converter isnt working right !

Re: Advice for heads. [Re: MR_P_BODY] #1748785
02/10/15 12:05 AM
02/10/15 12:05 AM
Joined: Jun 2006
Posts: 5,163
CT
GTX MATT Offline
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Quote:

Quote:

Quote:

Cab we raced together in the old days. I was there when you got tossed for sanblasted ports in your Hemi stocker.








Thats not cheating... he just got caught .. LOL...
IMO all the stockers are playing some kind of game





Poor Cab


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Advice for heads. [Re: GTX MATT] #1748786
02/10/15 02:35 AM
02/10/15 02:35 AM
Joined: May 2009
Posts: 39
south dakota
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correctdirection Offline OP
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south dakota
Fuel pressure and volume is not an issue. I got that sorted out last season. Aeromotive pump fed by a -10 line and -8 line from pump to regulator with a return line to cell. Pump fills gallon in 17 seconds. Fuel pressure gauge does not move. EGT is in low to mid 1400. Car sixty fts 1.44-1.46 depending on track.1/8 mile 6.93-6.96 @97mph. Running cal tracs. I looked at wrong page in log book. 120 mph trap speed. Could be converter I suppose. Top end of drive is just dead. Got a little better with new pump. The guy that flowed the heads figures I would gain 75-100 horse to get flow over 300. Was just wondering what others have done in this position.

Last edited by correctdirection; 02/10/15 02:39 AM.
Re: Advice for heads. [Re: correctdirection] #1748787
02/10/15 02:40 AM
02/10/15 02:40 AM
Joined: Nov 2004
Posts: 3,517
pacific northwest
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Stroker Scamp Offline
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pacific northwest
I have a set of MCH eddys on the Scamp, that being said there are plenty of good guys out there.


footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
Re: Advice for heads. [Re: correctdirection] #1748788
02/10/15 03:58 AM
02/10/15 03:58 AM
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
493_DART Offline
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Posts: 4,384
Worst Weather USA
Quote:

Fuel pressure and volume is not an issue. I got that sorted out last season. Aeromotive pump fed by a -10 line and -8 line from pump to regulator with a return line to cell. Pump fills gallon in 17 seconds. Fuel pressure gauge does not move. EGT is in low to mid 1400. Car sixty fts 1.44-1.46 depending on track.1/8 mile 6.93-6.96 @97mph. Running cal tracs. I looked at wrong page in log book. 120 mph trap speed. Could be converter I suppose. Top end of drive is just dead. Got a little better with new pump. The guy that flowed the heads figures I would gain 75-100 horse to get flow over 300. Was just wondering what others have done in this position.





what cam specs ? is it the bullet roller

also, for the heck of it--go to wallaceracing.com , and enter your times, etc, into their converter slip calculator.

my dart picked up THREE tenths with a converter swap. the old one was at 12 % .

Re: Advice for heads. [Re: correctdirection] #1748789
02/10/15 01:01 PM
02/10/15 01:01 PM
Joined: Jul 2004
Posts: 19,318
State of confusion
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Thumperdart Offline
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State of confusion
Quote:

I have exceeded the limits of my Stealth heads and trying to figure out what way to go next. My combo is a 500" stroked 440, 10.1 comp. Got a deal last year on a Bullet roller cam .668 lift 260 duration @.050. Engine is in a 68 Dart.
Looking for any input on what head to go with or where to buy at. Or thoughts on porting my Stealth,they flow 250 at .600 lift now. Two valve guides are broke now, makes me a little nervous about them now.
Any input is appreciated. Thanks.




That comp. and that duration are probably not too happy together # 1. What carb, plugs, timing etc. My home ported junk rpm`s work well 4 me but it`s the WHOLE combo from bumper to bumper that will shed et`s and go faster imo.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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