Was going to sneek to the track again
07-26-2014, 06:55 PM
#23
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WallaceRacing calculator for the slip
and no comp test....Eric did his and posted numbers, figured mine was about the same since we have same results/issues.
Cam was 106-106.5*
and no comp test....Eric did his and posted numbers, figured mine was about the same since we have same results/issues.
Cam was 106-106.5*
07-26-2014, 11:53 PM
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I checked my trap RPM when I crossed the line. It was around 5700 iirc. My cam was degreed in at 105.5, and my compression test was around 200 on each cylinder.
07-27-2014, 07:17 AM
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With an already well optimised rear tyre/gear combo. You guys are all looking at one detail here and there, rather than looking at the entire package. The entire combination is what gets results.
Doug saying it had 'only' a 4500 stall, which his car does also right? Now before I divulge further on the converter topic once again, you cannot in any way expect that having the "same" stall speed in a much heavier car to give anywhere near comparable results. If you are running the same motor and same everything else, if the car is heavier it needs MORE stall than that same combo would in a lighter car. This is simple physics, you need more torque and rpm to get moving and you still won't achieve the same results but you will see considerable improvement.
Did anyone ever go for a ride in DM's car? Doubt it. So I would say some aren't considering that the 4500rpm stall speed most likely was NOT the flash speed of the converter at all. A lot of old school people consider a 4500 stall, as sitting on the brake and giving the throttle a good mash and see what the converter will flare up to under stationary load. Now that doesn't mean the converter off the brake will not easily see another 500rpm of flash speed, because it will most likely go 5000+ flash speed off the line, and flash speed is what gets your junk moving out of the hole!
fast89stang has a combo that most likely would beat DM's best with his old 6.0 combo, with less cam and most likely a similar performing converter. Do the homework more carefully, this isn't rocket science folks.
Doug saying it had 'only' a 4500 stall, which his car does also right? Now before I divulge further on the converter topic once again, you cannot in any way expect that having the "same" stall speed in a much heavier car to give anywhere near comparable results. If you are running the same motor and same everything else, if the car is heavier it needs MORE stall than that same combo would in a lighter car. This is simple physics, you need more torque and rpm to get moving and you still won't achieve the same results but you will see considerable improvement.
Did anyone ever go for a ride in DM's car? Doubt it. So I would say some aren't considering that the 4500rpm stall speed most likely was NOT the flash speed of the converter at all. A lot of old school people consider a 4500 stall, as sitting on the brake and giving the throttle a good mash and see what the converter will flare up to under stationary load. Now that doesn't mean the converter off the brake will not easily see another 500rpm of flash speed, because it will most likely go 5000+ flash speed off the line, and flash speed is what gets your junk moving out of the hole!
fast89stang has a combo that most likely would beat DM's best with his old 6.0 combo, with less cam and most likely a similar performing converter. Do the homework more carefully, this isn't rocket science folks.
07-27-2014, 09:05 AM
#28
fast89stangs combo is a top performing mild combo for sure, but according to my calculations DM was making about 40 more HP to run the MPH that he did. I think Dave was shifting around 7200 compared to fast89's 6900-7000. There cars weight about the same so for track times, it is pretty apples to apples when figuring average HP.
07-27-2014, 09:52 AM
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I understand what your saying VLS1, and that's what were currently working on, optimizing the ENTIRE setup to work together.
These two threads are more or less just throwing ideas around. Daves setup was WELL documented. He documented every change he made and what improvements were had. With that being said, In a car that weighed the same as mine, with a gear/tire ratio similar to mine (mine:4.10/31 his:3.73/28), and a converter that stalled lower than mine (yes all be it an ATI compared to my transmission specialties) 3800 rpm, he still ran a 10.60 @ 129-131 mph.
My next step is to have my spare 8" converter restalled and refreshened (just not sure by whom yet, suggestions appreciated, lol) and give it a go again. Im still skeptical that a converter is going to get me 8 mph, but if it does I will be thrilled and gladly admit I was wrong.
One other thing of note is that somewhere along the way also, the combo was switched from the 780 cfm that im running, to a prosystems SV-1. I don't believe that the 780 is a choke point yet, but that will also be looked at when I get my fuel pump back on the car.
So don't take these threads as "still searching cause we don't like the answers we were given", LOL, cause their not ment to be that way. Its more or less just tossing ideas around while Doug waits for his weather to improve, and I wait for parts. With that being said I think I speak for both Doug and myself when I say that we GREATLY appreciate everyones input into helping us figure out little details. Thanks again, Eric L
These two threads are more or less just throwing ideas around. Daves setup was WELL documented. He documented every change he made and what improvements were had. With that being said, In a car that weighed the same as mine, with a gear/tire ratio similar to mine (mine:4.10/31 his:3.73/28), and a converter that stalled lower than mine (yes all be it an ATI compared to my transmission specialties) 3800 rpm, he still ran a 10.60 @ 129-131 mph.
My next step is to have my spare 8" converter restalled and refreshened (just not sure by whom yet, suggestions appreciated, lol) and give it a go again. Im still skeptical that a converter is going to get me 8 mph, but if it does I will be thrilled and gladly admit I was wrong.
One other thing of note is that somewhere along the way also, the combo was switched from the 780 cfm that im running, to a prosystems SV-1. I don't believe that the 780 is a choke point yet, but that will also be looked at when I get my fuel pump back on the car.
So don't take these threads as "still searching cause we don't like the answers we were given", LOL, cause their not ment to be that way. Its more or less just tossing ideas around while Doug waits for his weather to improve, and I wait for parts. With that being said I think I speak for both Doug and myself when I say that we GREATLY appreciate everyones input into helping us figure out little details. Thanks again, Eric L
07-27-2014, 03:38 PM
#30
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Yes...Eric and I are on a mission and since we pretty much built the same motors, we are sharing notes.
Yes, I understand the converter comparison. That being said...IF he had a 4500 in his lighter car and I used the same converter...I "should" see a higher stall since my car is roughly 400# heavier....correct ?
Anywho....we are doing this open book....no secrets.
Calling around for a re-stall on mine (8")....5500 sound good ?
Yes, I understand the converter comparison. That being said...IF he had a 4500 in his lighter car and I used the same converter...I "should" see a higher stall since my car is roughly 400# heavier....correct ?
Anywho....we are doing this open book....no secrets.
Calling around for a re-stall on mine (8")....5500 sound good ?
07-27-2014, 04:52 PM
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Understand all that, but you've only got to read his post in the carb database to see his pb was done running a 4.10 gear with 28" tyre.
And yes the exact same converter may slip a little harder in a heavier car, but still be less than ideal. Talk to a reputable converter company.
And yes the exact same converter may slip a little harder in a heavier car, but still be less than ideal. Talk to a reputable converter company.
07-27-2014, 06:05 PM
#33
It will be nice to eliminate the converter as a culprit on 1 of these 2.
5500 8" is racecar stuff. I have never done it, but I don't know if driving a stall like that around on the street would be much fun. Do you care about streetability?
5500 8" is racecar stuff. I have never done it, but I don't know if driving a stall like that around on the street would be much fun. Do you care about streetability?
Last edited by speedtigger; 07-27-2014 at 06:14 PM.
07-27-2014, 06:28 PM
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As for the little I do get out...I can deal with it
07-27-2014, 07:30 PM
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Will have very little impact on street driving duties. Was following a car last night with a 6500 stall and powerglide, it drove away from traffic lights no different to most 4000+ stall converters no problem at all, which was actually quite surprising.
07-30-2014, 10:59 AM
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Who built that converter? I'm trying to decide who to have restall my 8". Coan is in my backyard so to speak, but I know there's lots of other options out there
