Jump to content
SAU Community

Recommended Posts

Whilst not directly on topic - post 17 of the following link shows the different hp figures obtained using different shootout modes with the same car on the same day ( I knew turbo 4 cylinders were handicapped in shoot 4F :P ).

Notably, the second last dyno shows the effect on hp when the temp probe is placed near a heat source.

http://www.fordxr6turbo.com/forum/topic/59178-power-differences-between-shootout-modes/?hl=dyno

Edited by juggernaut1

1/4 mile/ MPH for finding out how much usable power you have, as stated before dyno for tuning.

Is that still a reliable indication of power, even if my slug auto won't get off the line due to the stock stally stator?

Good friend of mine stopped posting outright power figures on his wall in his cell due to people not liking them reading lower than other shops, and I mean considerably lower, but like the big sign above his dyno reads, dynos lie, tracks don't . I'm yet to see a car that didn't run the mph on the strip that the dyno power figure suggested.

Power delivery. What you lost in peak power you may have gained everywhere else

Could be that. I don't have a dyno graph of the supposed 330wkw run on 98, but I do have a dyno graph of a 320wkw run on E85 (not the 260kw 98 run).
So less power on E85 than it supposedly had on 98, but its surely going to be faster.
I think there must have been some tweaking done of the ramp rate to achieve the 330wkw figure for 98.
This is the dyno graph of the E85 run, does it looks fast? It sure feels fast!
post-115803-0-24003800-1404958875_thumb.png

Feels faster or is faster?

Fair point, I've never been to the track so don't have any rock hard evidence.

Lets just say it definitely doesn't feel like it has had 70kw ripped from it!

Dynos are tuning tools. The absolute power and torque measurements are irrelevant unless being used for a comparison to a change being done to compare to a previous measurement on the same dyno but even then changes in the driveline can make it hard to compare.It is used solely for tuning to assess and optimize engine parameters by a skilled operator.

Example is my clubby that with a flash tune and diff gears measured 270rwkw and did 107mph.I installed cams with head work, hi stall and retune and measured 274rwkw and ran 112mph. Based on mph should be about 40rwkw difference. And based on mph it should be about the 285rwkw mark give or take. Moral of the story the tuner used the dyno to optimise the setup and mph told me how much power it really had. Hope this helps.

You can strap a car down to tight and lose power as well :(

Unfortunately there are many things that will effect dyno reads including tyre pressure

As others have said a dyno is just a tool used for tuning and a vague indication of power, that said a dyno isn't going to shop 100hp on a 1000hp car and vise versa, if you think the operator is fudging figures for what ever reason and not just a low reading dyno, I would be going else where

Mph is the best indication of power v weight and ET is an idication of setup

I always take my car to the 1/4 mile track after I do something to it ( power wise ) to see real life gains for both MPH and ET

An example for MPH, I not long ago had my 34 tuned and right after that I went to the strip, knowing it would run a 10 I rolled off the line and shifted to second then nailed it for the first 4 runs to get an idea of mph and ran consistent 131-132mph ranging from 11.6-12.5 et, last pass full noise from start 10.8@132mph so the start doesn't make much if any difference on mph unless your still turning tyres half track :P

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I've heard the Tomei USA head gaskets are decent if you want to o-ring the heads but otherwise not recommended.
    • The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
×
×
  • Create New...