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I THINK WE`RE ON TO SOMETHING............. #237899 02/27/09 01:53 PM 02/27/09 01:53 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	If you`ve seen/heard my vid this pig is laying over in high gear.....I checked flash stall yesturday in 3rd and it flashes bet 4000-4500rpm`s so that seems ok. After thinking about it and talking to my machinest,I`m going to check my valve springs and see how they look and (for now) shim em up to get back my pressures since they`re 4+ years old w/LOTS of street miles. Hopefull that`s the reason it`s laying over if not, we`ll try something else. Thankxx 4 listning. 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237900 02/27/09 02:02 PM 02/27/09 02:02 PM
Joined: May 2007 Posts: 63 port alberni CAN. B BLACKFISH member
BLACKFISH member B Joined: May 2007 Posts: 63 port alberni CAN.	Just like to say that your car fascinates me. Great to see a budget minded car run so good at the track and on the street. Far more interesting than hearing about the 6 and 7 second so called street cars that can't make a trip to the track without overheating and rocker issues. Keep up the good work 9.80's are in the near future.

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237901 02/27/09 02:07 PM 02/27/09 02:07 PM
Joined: Sep 2003 Posts: 1,050 San Jose Ca. boatracer572 super stock
boatracer572 super stock Joined: Sep 2003 Posts: 1,050 San Jose Ca.	I would check the pressure of the valve springs and If Its low I would disgard ,buy, and install a new set! shiming a set of valve springs is just a cheap bandade in my eyes!valve spring are very inexpensive compared to what they can cause for damage! 5057315-_WI_0326.jpg (48 downloads) Last edited by boatracer572; 02/27/09 02:08 PM.

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237902 02/27/09 02:08 PM 02/27/09 02:08 PM
A Anonymous Unregistered
Anonymous Unregistered A	it sure can't hurt to check the springs but, don't you think if they were an issue, you would notice float in 1st and 2nd gear also?

Re: I THINK WE`RE ON TO SOMETHING............. #237903 02/27/09 02:23 PM 02/27/09 02:23 PM
Joined: May 2004 Posts: 12,486 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,486 Taxes & Virus's R-US, NY	Ditto... I would be looking at a fuel supply issue on the big end. I have had it, as well as many of my friends. Pump might say 140gph, yet you will find, it just might not be enough. I had a 340 car with 3/8" fuel line and such, jetting changes made no difference in mph, car would not climb much past 1/8 in high gear only. It had a holley blue on it. I put a second one inline with the first....From one pump right into the other and up to the carb. I dropped 10 jet sizes, and mph picked up big time. '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237904 02/27/09 02:50 PM 02/27/09 02:50 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	Do you have a fuel gauge that you can read in high gear? Sheldon

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237905 02/27/09 03:03 PM 02/27/09 03:03 PM
Joined: Aug 2008 Posts: 4,157 Mo. racerx master
racerx master Joined: Aug 2008 Posts: 4,157 Mo.	Quote: If you`ve seen/heard my vid this pig is laying over in high gear.....I checked flash stall yesturday in 3rd and it flashes bet 4000-4500rpm`s so that seems ok. After thinking about it and talking to my machinest,I`m going to check my valve springs and see how they look and (for now) shim em up to get back my pressures since they`re 4+ years old w/LOTS of street miles. Hopefull that`s the reason it`s laying over if not, we`ll try something else. Thankxx 4 listning. No proooblem thump.always like 2 read you'r post

Re: I THINK WE`RE ON TO SOMETHING............. #237906 02/27/09 03:18 PM 02/27/09 03:18 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	I just assumed it mattered more in high gear than down low since the motors loaded most in high gear. It could be fuel related but I figured if I shimmed up the springs and it picked up, then I`d put new springs on+ people have been shimming for years w/out issues. This thing 1/8th miles great that`s ANOTHER reason for my goofy thaughts. Last edited by Thumperdart; 02/27/09 03:20 PM. 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: RUNCHARGER] #237907 02/27/09 03:34 PM 02/27/09 03:34 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	I do have a guage but, my dumb a$$ didn`t look to see where it was at. 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237908 02/27/09 03:35 PM 02/27/09 03:35 PM
Joined: Jan 2005 Posts: 1,260 Las Vegas NV moparmanjames pro stock
moparmanjames pro stock Joined: Jan 2005 Posts: 1,260 Las Vegas NV	Quote: I just assumed it mattered more in high gear than down low since the motors loaded most in high gear. It could be fuel related but I figured if I shimmed up the springs and it picked up, then I`d put new springs on+ people have been shimming for years w/out issues. This thing 1/8th miles great that`s ANOTHER reason for my goofy thaughts. I also think it's a fuel issue, like others have stated, engine load has very little to do with valve float, it's more of an rpm issue and if you are not having issues in the 1/8 then it's almost certainly a fuel issue.

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237909 02/27/09 03:59 PM 02/27/09 03:59 PM
Joined: Mar 2008 Posts: 307 OH T TheBlackCar enthusiast
TheBlackCar enthusiast T Joined: Mar 2008 Posts: 307 OH	If you short shift car and ET stays same or improves, replace valve springs. Also, if it has a roller cam, pull cam and look at it, if springs are weak you will see where the lifter is landing on the backside flank.(jumping the lobe) In which case, thats why most people have lifter issues, the wheel splits after a while. As long as you claim the the springs have been in there, they are more than likely shot, unless you back off the rockers when car sits. As for the fuel possibilities, if you keep throwing jet at the carb to satisfy top end plug reading and the bottom end numbers start to falter, its fuel volume. Good Luck

Re: I THINK WE`RE ON TO SOMETHING............. [Re: TheBlackCar] #237910 02/27/09 04:21 PM 02/27/09 04:21 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Thankxx.....I`m no expert by any means and am open to all suggestions. It`s possibly a combinatin of ALL the above as this thing has hundreds of street miles w/open pressures bet 580-600lbs and closed #`s around 260-280. I`ll flow my pump again at the new 9 lbs. and see how long it takes to get a gal. 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237911 02/27/09 04:29 PM 02/27/09 04:29 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: Thankxx.....I`m no expert by any means and am open to all suggestions. It`s possibly a combinatin of ALL the above as this thing has hundreds of street miles w/open pressures bet 580-600lbs and closed #`s around 260-280. I`ll flow my pump again at the new 9 lbs. and see how long it takes to get a gal. with an adequate pump you don't need 9 lbs of fuel pressure. volume is the key thing. if your raising fuel pressure and the e.t. improves, you need more volume. raising the pressure is nothing more than a band-aid. 7.5 lbs should me more than enough pressure if you have enough pump and proper sized fuel lines.

Re: I THINK WE`RE ON TO SOMETHING............. #237912 02/27/09 04:33 PM 02/27/09 04:33 PM
Joined: Feb 2004 Posts: 2,073 Tulsa, Ok WadeMetzinger top fuel
WadeMetzinger top fuel Joined: Feb 2004 Posts: 2,073 Tulsa, Ok	If it's fuel delivery or shortage and that's what it sounds like to me you better get out of it quick or you'll melt spark plugs and pistons, I speak from experience.... Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237913 02/27/09 05:25 PM 02/27/09 05:25 PM
Joined: Jul 2004 Posts: 4,384 Worst Weather USA 493_DART master
493_DART master Joined: Jul 2004 Posts: 4,384 Worst Weather USA	hey Thump, for the heck of it, find that torque converter slippage calculator , and punch in your numbers. Mine came out 13% slippage ... no wonder my car is super lazy on the top end

Re: I THINK WE`RE ON TO SOMETHING............. [Re: 493_DART] #237914 02/27/09 05:49 PM 02/27/09 05:49 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	I didn`t look at my tach through the stripe so I don`t know where I was at. In the past if I remember correctly, I went 10.13 @ 132+ w/4.11`s at 6800-7000 rpm`s if that helps. 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237915 02/27/09 06:02 PM 02/27/09 06:02 PM
Joined: Jul 2004 Posts: 4,384 Worst Weather USA 493_DART master
493_DART master Joined: Jul 2004 Posts: 4,384 Worst Weather USA	here it is - http://www.wallaceracing.com/converter-slip.php

Re: I THINK WE`RE ON TO SOMETHING............. [Re: 493_DART] #237916 02/27/09 06:07 PM 02/27/09 06:07 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	The MPH is right were it suppose to be given the E/T. At least it is on the cars/trucks I have built. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: I THINK WE`RE ON TO SOMETHING............. [Re: 493_DART] #237917 02/27/09 06:50 PM 02/27/09 06:50 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart OP I Live Here
Thumperdart OP I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Punching in my stats gave me 9.79%...... ? 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.....

Re: I THINK WE`RE ON TO SOMETHING............. [Re: Thumperdart] #237918 02/28/09 11:30 AM 02/28/09 11:30 AM
Joined: Feb 2005 Posts: 370 Real North Cal. 6 66er enthusiast
66er enthusiast 6 Joined: Feb 2005 Posts: 370 Real North Cal.	How's your ignition system. If it is weak it will show you in high gear. How old are your, cap and rotor, wire, and plugs. I had a simullar problem at the March Meet last year. I cleand the reluctor and pick-up coil on my MSD dist. and the problem went away. How is that for a cheap fix

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