dyno in 3rd or 4th gear

This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Just watched a video of the new 335i pulling on a dyno. Oct 22, 2016 #1. as far as an n/a motor goes, it should not matter. This make WOT 4th gear AFR a little richer which on dyno drops the numbers but running on dyno and running on street aren't same. A quote from AZGolf: "Most cars will dyno about the same in 3rd or 4th gear. I think that you'll find that most tuners agree, but whichever you choose you just want to ensure you choose it again in the future if you're ever measuring delta due to a modification. You could not make a pull in first gear as the tires would not hold. Or sign in with one of these services. Tunning in 5th usually give me this result. I already did my dyno testing and have my boost levels set and so forth. When I dyno'd last year, I dyno'd in 3rd gear. Forth gear is 1:1 but most tuners will use 3rd as they don't want to beat on your car too badly. HSVJPL. FYI, I have 4 dyno graphs of 3rd and 4th gear pulls. I dynoed my car today. Fiesta ST Forum is the premier Fiesta ST community. 4th is bad enough, I believe hitting somewhere around 130-140mph. His father Mikhail, a Soviet table tennis champion in 1982, moved his family to Germany shortly after Dimitrij was born. Closed course of course... At that speed you're covering some serious ground and not everyone has that open road to do it on. There was a 20rwhp difference between the two. Every dyno is different though, our 4th gear braked run pulls can last up to 22 seconds, this isn't ideal for showing big numbers but does show how well the car copes under pressure. 3rd run - strapped and chocked to Dyno Dynamics specs - 4th gear = 250.9kw So using 3rd instead of 4th in my A6 made 6kw difference. Dyno in 5th gear. Just because in 2nd gear, the torque actually applied to the wheels is greater than in 3rd or 4th gear, doesn't mean the dyno will read higher. Dynos do not measure torque -- they measure horsepower, and calculate torque from that. So I have had Tom's car on the rollers and it just made 933 RWHP yesterday in 4th gear. The 3rd gear trace was 16 hp higher than the 4th gear trace. 4th gear will give more realistic load and boost conditions. These pulls were done back to back with all variables being equal. With our 3.06 rear, the car will go past 150mph every pull. Here is my SE-R in 3rd vs. 4th gear on another dynojet. If you ever look inside a T-5 you can see that in 4th gear there's less gear surface area then in 3rd, less friction equals more power. Find helpful customer reviews and review ratings for OfficeSmartLabels - 9/16" x 3-7/16" 2-Up File Folder Labels, Compatible with Dymo 30277 (2 Rolls / 260 Labels Per Roll) at Amazon.com. Sign in with Facebook. 88 Upgrade to 5 Lug/Disc Brake Conversion Confirmation of Plan. Also, a final drive ratio such as 3.15:1 will often show a higher power reading than a 3.37:1 ratio. Just had a thought, and thought I would share. Find helpful customer reviews and review ratings for OfficeSmartLabels - 9/16" x 3-7/16" 2-Up File Folder Labels, Compatible with 30277 (4 Rolls / 260 Labels Per Roll) at Amazon.com. These pulls were done back to back with all variables being equal. 28-02-2008, 07:07 PM. What would happen if you dyno'd in first gear? Turbo Technics S280 Turbo Kit Dyno, Virtual Dyno, and Datalog Thread, looking for one San Jose Area owner interested in dyno testing, '19 Fiesta ST mods, plans, opinions (not a build per se). You must log in or register to reply here. I think it is doen to slow down the accleration of the tires so the dyno has time to take more data. I saw mention of this on charger forums too. They have to calculate your torque to the rear wheels, and because 4th gear is 1:1, they don't need to calculate the trans gear into the mix. same principle if you go dyno then put a diff gear in the rear end, the numbers should not change. :beer: Oct 21, 2005 #2. I was wondering if you guys (both NA and turbo) could post the difference between your 3rd and 4th gear dyno pulls. Its best to get the tranni to autohold a gear, this way when you mash the pedal it wont downshift on you. You are using an out of date browser. I see people all the time running in 3rd and I never understand why. DYNOED IN 3rd OR 4th GEAR; If this is your first visit, be sure to check out the FAQ by clicking the link above. Thread starter STjake; Start date Oct 22, 2016; S. STjake Member. Presumably, the gear or gear ratio would be one of them, no? I've done a set of 3rd gear and 4th gear pulls at two different shops. To do this, you would need to purchase an Early 92 3rd gear, 4th gear, 3/4 hub and slider, 3/4 springs, 3/4 keys, 3/4 shift rail, 3/4 shift fork, and other misc. They have one of those "3 pulls for $40" dyno days coming up here in town. Fondy. Day to day fluctuations can make just as big of a difference. For sale selector fork 4th and 5th gear for gearbox Ferrari Dino 206Gt and 246 series 1, original ,...,selector fork 4th and 5th gear for Ferrari Dino 206Gt and 246 in Karlsruhe - Karlsruhe 4th will show the most accurate numbers. I've always been a firm believer in running whatever gear is as close to a 1:1 ratio as possible. It may not display this or other websites correctly. If you dyno in 3rd you actually have a mechanical advantage that will cause the dyno to read higher. I think it would be pretty cool to know what you would dyno in all of your gears to see which one make the most power. Should I be dynoing in 4th instead? If you ever look inside a T-5 you can see that in 4th gear there's less gear surface area then in 3rd, less friction equals more power. What would happen if you dyno'd in first gear? Here’s why… Working with a gearbox whilst a high input/output ratio gear is selected, 1st gear for instance, causes the effects of gearbox temperature variation to become amplified. Dimitrij Ovtcharov (Russian: Дмитрий Овчаров) or Dmytro Ovtcharov (Ukrainian: Дмитро Овчаров; born 2 September 1988) is a Ukrainian-born German table tennis player. Why are there only dynos is 3rd/4th gear? well technically yes, but it’s a whole lot easier to do it if the gear selcted has a ratio close to 1:1. You must log in or register to reply here. But a few posts I've seen recently people said they dyno'd in 4th. Fourth is the closest to 1:1 and will yield higher numbers, but I don't think the added stress to the drivetrain is worth the 3-5% unless you're strictly shooting for dyno brags. Wouldn't first gear be your main gear in drag racing? Just had a thought, and thought I would share. The final number came out to 276HP and 299ft/lbs...however, it makes me wonder which numbers they used, the pull in 3rd or in 4th. Read honest and unbiased product reviews from our users. Ovtcharov won one silver and three bronze medals at the Olympics between 2008 and 2016. The first shop did tw 4th gear pulls and then a single 3rd gear pull and the second shop just did three 3rd gear pulls. UNICHIP equipped car. Seems to me a pull to the rev limter in 4th would take so long, I mean thats like 170+ mph. You may have to register before you can post: click the register link above to proceed. It simply looks at the wheel speed versus engine RPM, calculates the correct gearing and displays the correct power output. How is it then that so many people get higher readings of power in a higher gear? But a few posts I've seen recently people said they dyno'd in 4th. For a better experience, please enable JavaScript in your browser before proceeding. 3rd gear produced more power than 4th gear; 158.51 hp in 3rd to 155.46 in 4th gear. i know most people dyno in the gear that has a 1:1 ratio, but most of the time it is 4th. Read honest and unbiased product reviews from our users. It will be accelerated until it hits the rev limiter. When I dynoed it was only a difference of 2hp, but I'm NA. Jeff is going on an actual dyno, not doing a v-dyno run. Going to the dyno on Saturday so I'd like to know. 4th will show the most accurate numbers. As Rodrigo has said, using 4th gear allows more control, it also usually gives a 1:1 gear ratio so dyno figures are more accurate. They dyno'd in 3rd...what I thought to be standard, then they dyno'ed it in 4th. 4th gear gives direct drive to the rear wheels and is not geared down or up like it is in other gears which would multiply the torque and therefor power. FYI, I have 4 dyno graphs of 3rd and 4th gear pulls. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-. I've noticed some talk about how 4th gear will get slightly higher results and I think I understand why, but the place I'm going to says they do 3rd gear runs. However, proper strapping down made a much bigger difference! With very high powered turbo cars, there isn't enough load in the lower gears … parts for the rebuild. Going to the dyno on Saturday so I'd like to know. Although fourth gear has been the “de facto standard”, some dyno operators prefer to use fifth gear, and now 6th gear, which can distort comparisons. There's something wrong. One guy had nitrous so I assumed that was the reason. If you use a lower gear, this will result in a higher torque multiplication through the gearbox and on a roller this may cause traction problems. I'm gonna go with the top reason being top speed - even with our short gearing I think I'm in the 180kmph plus range when I do a 4th gear pull. One guy had nitrous so I assumed that was the reason. With mods on sig. I have never dynoed a car, but doesn't the operator have to enter in a bunch of parameters specific to the car in order to get an accurate reading? Tuning in 4th tends to lean out 5th gear WOT AFR. Why 3rd gear dyno? The dyno pull in 4th gear is just way too short at this HP level. I'm going to be visiting a dynamometer later this fall and wanted you guys' perspective if you have experience....is there any difference on our cars between testing it in 3rd gear vs. 4th? At least from my experience on the dyno. Power readings recorded in fifth or sixth gear are generally higher than those performed in fourth gear. It'd still be cool to know what you dyno'd in first. To start viewing messages, select the forum that you … We offer one of the largest collection of Fiesta ST related news, gallery and technical articles. You may have to register before you can post: click the register link above to proceed. If you dyno in 3rd you actually have a mechanical advantage that will cause the dyno to read higher. The amount of time to spin up to full rpm and overall speeds are significantly higher in fourth, which ultimately is a significant heat difference. really the only time it will make a difference is in a turbo car due to the way a taller gear will accel the engine slower(loading) allowing boost to be achieved. Hey guys, theres a thread about this over at the pulsar board and they are saying that there is a big difference between 3rd and 4th gear dyno pulls. For a better experience, please enable JavaScript in your browser before proceeding. I dunno. JavaScript is disabled. In 3rd its hits the limiter somewhere around 125. I see people all the time running in 3rd and I never understand why. When I dyno'd last year, I dyno'd in 3rd gear. I really think that with the gearing of the M3 that maybe 5th gear would be better for a dyno in this HP range. My advice is to simply choose one and stick with it. Thanks a lot. DYNOED IN 3rd OR 4th GEAR; If this is your first visit, be sure to check out the FAQ by clicking the link above. At least with my Legacy twin turbo, max boost is not reached in the first 3 gears, and actually there is a slight difference between the max boost in 4th and 5th gear. Sign in with Twitter However, I would need to remove my speed limiter to run through 5th gear, and on my car, running it to redline in 5th would mean hitting 167mph or so on the rollers. Trying to measure torque would require more knowledge about the transmission and final drive ratios. I would reccomend having a fresh rebuild on the rest of the transmission as well, as it should be fully cleaned out, and disassembled so that there isn't any carnage found somewhere else in the trans. Here is my old Evo 8 on TT's dyno with 3rd and 4th gear back to back. CY98Cobra New Member Established Member. Can we just test in any gear and still get accurate results? I want my 4th gear AFR to be a little richer as on the street 1st - 4th are your full power gears. To start viewing messages, select the forum that you … I think it would be pretty cool to know what you would dyno in all of your gears to see which one make the most power. Wouldn't first gear be your main gear in drag racing? There's also traction issues that can come from using lower gears, the lower the gear the more torque is generated at the wheels giving dynos a … Unless the software just defaults to a 1:1 ratio, in which case using 4th would seem to be most accurate. Ignoring the difference in numbers from the shops the dyno sheets display the same trends so I would say it makes no difference. Errors and manipluations of variables on dynos, which is why the numbers you … JavaScript is disabled. 4th gear, or whatever gear is closest to 1:1 is normally a pretty good place to run the car. 05-09-2007, 08:43 AM. Should I be dynoing in 4th instead? There was a 20rwhp difference between the two. +1 to 3rd gear being less intense on the transmission. Why are there only dynos is 3rd/4th gear? In our cars that's 4th gear. I think SRT's are pulling in 4th and RT's are in 3rd. The behavior is close to what DLL showed on the X. BA autos are put in 3rd gear in manual mode and it will stay in 3rd until it is changed by the dyno operator after the run is complete. In our cars that's 4th gear.

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