Dynoed my caldina now with plots

[2jayzgte]

Forget about the HP figure but if you can get that torque figure up and earlier in the rev range thats where the gain is the HP figure is just a number torque is where its at for a road car.....

[fivebob]

For most cars, or is 4wd? Roughly, you times the horsepower at the wheels by 1.2-1.3 to get the power at the flywheel, read it somewhere, dont know where there...

Stop believing everything you read then. That's just BS.

[fivebob]

Sorry I meant correction method, I know what correction factor is but am used to seeing SAE or DIN used. What is the one used here?

STD or STP. Another power correction standard determined by the SAE. This standard has been stable for a long time and is widely used in the performance industry. Power is corrected to reference conditions of 29.92 InHg (103.3 kPa) of dry air and 60 F (15.5°C). Because the reference conditions include higher pressure and cooler air than the SAE standard, these corrected power numbers will always be about 4 % higher than the SAE power numbers. Friction torque is handled in the same way as in the SAE standard.

so taking that into account the figure would be approx 270HP using SAE correction factors.

Shit 99gtt, you've lost nearly 40 hp in just over one page of posts... not looking good

[Lith]

LOL we should shut up before he has to walk home from the dyno

[99gtt]

so taking that into account the figure would be approx 270HP using SAE correction factors.

sh*t 99gtt, you've lost nearly 40 hp in just over one page of posts... not

looking good [/quote] Well that works out considering factory hp is 255 , i have made a wopping 15 hp . But if you calculate the rain we had today and the temperature drop i would say 270 hp is on the high side . Also the boost figure is wrong it should be 14 psi , only just clicked to that as that is the waste gate spring[[/quote]

[Bazda]

They have printed you out a graph of flywheel hp.
When i got my dyno run on the dynapack dyno, i specifically told them to put in all the right parameters etc cos i wanted it reading bang on, and I said i wanted it in wheel power not flywheel. They printed me out a flywheel one as well as a wheel figure.

[2jayzgte]

On a Hub Dyno how can you get a dead on figure of rear wheel HP when the wheels are'nt on the car?????

Surely the only dead on bulls way to measure HP accurately is on a engine dyno and at the flywheel.

In my experience with these Dyna-pack Dynos read approx. 10-15 % higher than a Dyno Dynamics and Torque Performance type Dyno's so figures will vary for example my figures I got 323 KW on a Dynapack @ 1.2 bar but on the Torque Performance Dyno running the same boost only got 280 KW.So thats 43 KW difference between those two.

[IH8TEC]

and why i got 196.6 on a dyno dynamics, and all the guys in welly are getting over 200 with 5-7psi less on dyna packs.

they are a tuning tool

[Bazda]

On a Hub Dyno how can you get a dead on figure of rear wheel HP when the wheels are'nt on the car?????

Surely the only dead on bulls way to measure HP accurately is on a engine dyno and at the flywheel.

In my experience with these Dyna-pack Dynos read approx. 10-15 % higher than a Dyno Dynamics and Torque Performance type Dyno's so figures will vary for example my figures I got 323 KW on a Dynapack @ 1.2 bar but on the Torque Performance Dyno running the same boost only got 280 KW.So thats 43 KW difference between those two.

Because you in put the diff ratio into the program and you use 4th gear its 4th gear on most cars is nearly 1:1, then u make sure when ur in 4th gear going 3000rpm or something u make sure the dyno is reading exactly the same rpm.

[99gtt]

On the exact some dyno my mates caldina with standard turbo exhaust 3 inch , waste gate, walbro and modified intake got 244hp and his says flywheel hp aswell . Stock is 255 hp so i am guessing it is actually reading low or it is at the hubs.

[2jayzgte]

On a Hub Dyno how can you get a dead on figure of rear wheel HP when the wheels are'nt on the car?????

Surely the only dead on bulls way to measure HP accurately is on a engine dyno and at the flywheel.

In my experience with these Dyna-pack Dynos read approx. 10-15 % higher than a Dyno Dynamics and Torque Performance type Dyno's so figures will vary for example my figures I got 323 KW on a Dynapack @ 1.2 bar but on the Torque Performance Dyno running the same boost only got 280 KW.So thats 43 KW difference between those two.

Because you in put the diff ratio into the program and you use 4th gear its 4th gear on most cars is nearly 1:1, then u make sure when ur in 4th gear going 3000rpm or something u make sure the dyno is reading exactly the same rpm.

Yes I understand the correction but the Dyna-packs still will read higher than a proper rolling road dyno.I do not no why this is but they just seem to.I'm not a huge fan of RWHP dyno readings as it confuses to many people when different figures that are thrown around.With my above figures suggest I think in my view the Dyna-pack are closer to what is going on at the fly-wheel and the actual Dyno Dynamics or Torque Performance is more closely related to a rear wheel HP figure.

The only way to test my theory is to go to Hi-velocity or Torque Performance with the same settings and then compare the two figures I'm pretty sure your Dynapack figure will be higher than the latter.

[Lith]

Yes I understand the correction but the Dyna-packs still will read higher than a proper rolling road dyno.I do not no why this is but they just seem to.I'm not a huge fan of RWHP dyno readings as it confuses to many people when different figures that are thrown around.With my above figures suggest I think in my view the Dyna-pack are closer to what is going on at the fly-wheel and the actual Dyno Dynamics or Torque Performance is more closely related to a rear wheel HP figure.

The only way to test my theory is to go to Hi-velocity or Torque Performance with the same settings and then compare the two figures I'm pretty sure your Dynapack figure will be higher than the latter.

Depends on the dyno, the way its been set up etc. It'd make more sense that Dynapacks would read higher as they don't have tires/wheels to contend with so there is less in the way - however some rolling road dynos do read higher than some Dynapacks. Dyno Dynamics dynos read quite low, though I know people who have run on Speedtech's hub dyno then run on a TP dyno and gained power from nowhere.

Dynojet dynos are a very good example of a high reading rolling road dyno - causes much confusion when researching mods from different countries as you can get skewed ideas of what you should expect on a dyno here. Look at the real world results for an indication of what something can do

[Bazda]

Well i've had my car on 2 dynos, one was a rolling road at Shore performance and 1 at a dyna pack one by mark from tricky tunes and they read exactly the same. I made 187kw on 8psi on the rollign road and I made 205kw on 10psi on the dynapack one. Which would say they were pretty close in figures.

My old man had his escort on shore performances one and also on Dodsons rolling road and they both read 187kw atw. He also had his engine on Lynn Rodgers engine dyno which it read 295hp and if you do the right conversion the rwhp related back to the flywheel hp by using a 15% loss through the drive train (like 5hp off) so which said the dynapack hub dyno I went on is pretty accurate. But ud use about 12.5% loss in a fwd.

I do know a guy who made just over 300kw on a dynapack dyno but the performance of the car does not relate back to the figures at all.

So not all dyna pack ones read high. It depends how they are calibrated.

[2jayzgte]

Yes I understand the correction but the Dyna-packs still will read higher than a proper rolling road dyno.I do not no why this is but they just seem to.I'm not a huge fan of RWHP dyno readings as it confuses to many people when different figures that are thrown around.With my above figures suggest I think in my view the Dyna-pack are closer to what is going on at the fly-wheel and the actual Dyno Dynamics or Torque Performance is more closely related to a rear wheel HP figure.

The only way to test my theory is to go to Hi-velocity or Torque Performance with the same settings and then compare the two figures I'm pretty sure your Dynapack figure will be higher than the latter.

Depends on the dyno, the way its been set up etc. It'd make more sense that Dynapacks would read higher as they don't have tires/wheels to contend with so there is less in the way - however some rolling road dynos do read higher than some Dynapacks. Dyno Dynamics dynos read quite low, though I know people who have run on Speedtech's hub dyno then run on a TP dyno and gained power from nowhere.

Dynojet dynos are a very good example of a high reading rolling road dyno - causes much confusion when researching mods from different countries as you can get skewed ideas of what you should expect on a dyno here. Look at the real world results for an indication of what something can do

For me I'm pretty sure that the Torque Performance dyno is a more relative figure for my car as I'm sure as hell the factory turbo's on my car will not allow for 320 RWKW they just won't move enough air and I have also seen other Supra owners Dyno figures on the same dyno's that indicate that 300 RWKW while possible with my factory setup is unlikely as the highest figure I have seen is 296 RWKW @ 1.3 bar which roughly equals about 450 HP at the flywheel.

And yes the Dyno-jet in the U.S is well renowned for turning out huge numbers but they are pretty close to what the Dynapack numbers are though.But as aleady mentioned it does'nt really matter as they are just a tuninng tool and to get consistency its not worth chopping and changing as long as yousee gains when you do your mods regardless of what dyno your on I suppose this is the key.

[IH8TEC]

exactly, i used same dyno as i got 147, and now it has 196.6, (hi velocity) and as far as i'm concerned thats a pretty good gain from an extra 5psi, with a ton more driveability.