Turbo(s) Upgrade

[some_cs_student]

Meh, the argument is that this dyno reading was higher than what the most likely power is in real life.

Not many dyno's get tuned very often to make sure they read accurately...

Anyway, let's get back to the subject

[R33GTRKid]

the argument is wrong, I just went to another place this afternoon for a power run just to satisfy my curiosity, within 1% of the previous reading and on the higher side too, the argument is too simplistic, does not take into consideration wheel size, head wind etc.

My initial post was on topic, he was asking what turbos he should get, I gave him some insight that a safely tuned stock bottom end RB26 running GTSS's (-9's) is capable of running low to flat 12's, perhaps even high 11's with the right set up, it gives it a real world perspective rather than just dyno figures....

but as you say 'meh', I also give up, all I can go on is what my car has put down now on two different dynos and what it ran last night on what was a pretty faultless run, good launch, perfect changes, flat to the boards

Edited February 5, 2009 by R33GTRKid

[JAGR33]

With standard turbos at 15psi and standard ecu the best i got was 12.0 at 115mph (R33GT-R with 265/35/18 Hankooks).

Power was around 250rwkws...

So, R33GTRkid, there's not too much wrong with your time, it maybe a little slower than expected but ain't the end of the world.

Different people in different cars at different tracks get different times....

Sounds confusing.... but, such is life...

[The Dan]

the argument is wrong, I just went to another place this afternoon for a power run just to satisfy my curiosity, within 1% of the previous reading and on the higher side too, the argument is too simplistic, does not take into consideration wheel size, head wind etc.

My initial post was on topic, he was asking what turbos he should get, I gave him some insight that a safely tuned stock bottom end RB26 running GTSS's (-9's) is capable of running low to flat 12's, perhaps even high 11's with the right set up, it gives it a real world perspective rather than just dyno figures....

but as you say 'meh', I also give up, all I can go on is what my car has put down now on two different dynos and what it ran last night on what was a pretty faultless run, good launch, perfect changes, flat to the boards

Don't give up. These guys love it.

I'm with you on this one. Individual weight, tyre size, head wind, 60 foot time even. They all have a lot to do with your trap speed. Your MPH is more of a guess at your power than the other way round so I'd be on side with the dyno on this one. Maybe you only have 270rwkw, maybe 280. It's still respectable and does give a good insight into what that setup can do.

[SimonR32]

so you are implying that XSpeed's dyno is happy then. But then it means everyone else's dyno's are wrong too because heaps of people with allegedly more power than me were doing similar trap speeds..... bah I give up, I was happy

i dont mean to be rude...

but if the car was running genuinely running that power (xspeed dyno isnt happy) and you only ran that mph you need to learn how to drive!!!

or ring me next time before u go to the plex and ill borrow your keys... should easily run a 11 with that power, but not that mph

[SimonR32]

in saying that i borrowed someone elses keys in his 32 gts4 with a rb26 with big single running 405rwhp (was laggy as f**k)

he was running a mid 12 at 110-112mph... gave me keys and i ran a 11.99 @ 119mph first pass having never driven the car before. i drove it about 20m from the staging lanes to the lights and off i went

[R33GTRKid]

well you may not have meant to have been rude, but you were.

You can ask the people that were present on the night, there was NOTHING wrong with my driving. I have been driving for 17 years, have driven group N rally for at least 6 of those, had rexes, supercharged 6 litre utes etc etc. Aside from launching the GTR, everything else was done perfect. A 1.8 60' time with 18 inch rims would indicate that my launch was not that bad. I also had a jammed pack full tank of juice, about 30 kilos worth of stereo (probably more, the sub box probably weights that) plus my 100kg fat ass.

Again I say it, it was hot on the track, we were left idling for a LONG time before each pass, with pods that are not enclosed and we were heading into a 14 knot head wind (which is 16 MPH in itself slowing my trap speed). Cars with a lot more stated power than mine were going alot slower.

So your comment is simply unfounded and is frivolous to say the least. Your second post goes someways to proving that your first statement was off, a 32 GTS4 would be at least 100 or so KG lighter than my 33 GTR, your example had 25 hp more, lag really does not come into play at the drags if you can drive, you start off on boost and never come off, if you can drive, and your time was less than 0.35 seconds better than mine, albeit the speed was higher by 8 MPH, what was the wind doing?

Finally and with the utmost of respect, would you hand your f**king keys over to some bloke you do not know to go belt down a drag strip? No, I didnt think so and nor would I!

The car was genuinely running that power when X-speed dynoed it and was again last night, well it ran 382 apparently.

Edited February 6, 2009 by R33GTRKid

[Rodent GTR]

Bugger!!

First assumption lead to going for -5's, mainly due to the extra hp you can from them,

the more hp the faster the car, not entirely true i start to learn, after reading the later replies i understand more about where the power from the -5's is unleashed, and where it will indeed leave the -7's+-9's behind,

Maybe for me -7's might be the way to go, as it's more about 1st 2nd 3rd + it would seem you get much quicker response / less lag, i know it depends on your supporting mods as well but in general i speak.

Still bothers me about the limit of where you can go with -7's though, and through what ive read about people reaching the boundaries of there power limit, i am like most people on here, pleased with the new stuff at the time but always want to get quicker and quicker,

[R.3.2.G.T.R]

haha where will it stop?? lot depends on your driving style as well, for me gt-ss, as i want response rather than top end power.. will only drive to 6500-7000rpm, first 3 gears and then cruise, street driven.. not into drag racing but feels good to have usable power

[SimonR32]

well you may not have meant to have been rude, but you were.

You can ask the people that were present on the night, there was NOTHING wrong with my driving. I have been driving for 17 years, have driven group N rally for at least 6 of those, had rexes, supercharged 6 litre utes etc etc. Aside from launching the GTR, everything else was done perfect. A 1.8 60' time with 18 inch rims would indicate that my launch was not that bad. I also had a jammed pack full tank of juice, about 30 kilos worth of stereo (probably more, the sub box probably weights that) plus my 100kg fat ass.

Again I say it, it was hot on the track, we were left idling for a LONG time before each pass, with pods that are not enclosed and we were heading into a 14 knot head wind (which is 16 MPH in itself slowing my trap speed). Cars with a lot more stated power than mine were going alot slower.

So your comment is simply unfounded and is frivolous to say the least. Your second post goes someways to proving that your first statement was off, a 32 GTS4 would be at least 100 or so KG lighter than my 33 GTR, your example had 25 hp more, lag really does not come into play at the drags if you can drive, you start off on boost and never come off, if you can drive, and your time was less than 0.35 seconds better than mine, albeit the speed was higher by 8 MPH, what was the wind doing?

Finally and with the utmost of respect, would you hand your f**king keys over to some bloke you do not know to go belt down a drag strip? No, I didnt think so and nor would I!

The car was genuinely running that power when X-speed dynoed it and was again last night, well it ran 382 apparently.

its ok, your 380hp r33 gtr has a slower trap speed than my old r32gts-t with only 275rwhp on the same dyno

you must be a great driver!!!

Edited February 6, 2009 by Cerbera

[R31Nismoid]

lol

[yummy]

Dyno1.pdf

whatever, there is the proof of power

timeslip___5.2.09.pdf

there is timeslip, no did not back off anywhere.

Also interesting to note that F6 ute with 300rwkw doing 12.6's, another member with 290rwkw in his R32 GTR was getting 12.5's at 107MPH, a R34 GTR (the blue one from overeast bought from the dude off the forum) is next to me on the time slip and was getting consisten 110ish MPH the whole time and he reportedly has 450rwhp??? he was not backing off either.....

And I checked 4 different website calculators and they all pretty much came back with 110MPH being spot on for a 1690 car and 380 rwhp but of course you must be right

Could be that motorplex is just shite track, was heading into a 13 knot head wind, and track was 38 degrees but all I can say is what happened and what my car has.

My car had a boost leak due to a split intercooler pipe.

Simon, tbh 110mph is low for 380rwhp. My old 33 gtst ran 110mph with around 300rwhp. Also, the motorplex is a good track and is apparantly one of the 'fastest' ones in Australia. I'm not sure why your mph is lower than expected, but hopefully it will be better this week after your final tune. Good luck with it, I'll see you Wednesday.

[rev210]

R33GTRkid,

Flat 12 here with R32GTR and about 300rwhp. road tyres.

Dyno sheets are obviously a relative power figure for sitting on the rollers somewhere at a particular time. Power generation can change for a variety of reasons once arriving at a race track. The key to the tune is ensuring consistancy, road tunes are worth the time but, so is ensuring you are dyno tuning with the bonnet down and have basics like cold air induction in place.

Nothing wrong with x-speeds dyno , the numbers are probably right (bonnet up or down figure?). The car was just having some problems on the day.

GT-SS setup right are a high 10 turbo / low 11 no dramas.

You were missing a few ponies at the track, perhaps due to heat soak issues in the staging area as you mentioned. No cold air/exposed pods is a big part of that.

Hope that helps

Edited February 8, 2009 by rev210

[heller44]

Simon, 12.2 @ 111MPH at the plex with just on 260rwkw in a full weight (inc stereo, full fuel and larger fellow) 32 gts4.

[R33GTRKid]

its ok, your 380hp r33 gtr has a slower trap speed than my old r32gts-t with only 275rwhp on the same dyno

you must be a great driver!!!

sarcasm the lowest form of wit, what does that say about you?

All I can f**king say is that the dyno says what it says, the time sheet says what it says, the launch was good at 1.8 60', my foot was to the floor, changing at about 7,500 rpm with no missed gears and quick changes, heading into a 13 knot headwind, that's as far as I can go with it.

Personally, bagging out someone's driving without any grounds to when you were not there is just being a wanker in my books but that's just my opinion.

Rev210, I would like to meet up with you if you have time one day so you can have a look at the setup and maybe suggest some things with the intake that may assist in this

Edited February 12, 2009 by R33GTRKid

[rev210]

Rev210, I would like to meet up with you if you have time one day so you can have a look at the setup and maybe suggest some things with the intake that may assist in this

No worries mate. Happy to help

[R31Nismoid]

Ok back on the dyno tonight

280rwkw @ 15psi

previous - 250rwkw @ 12-12.5psu

That's from one dyno to another also, and results look to vary within what you'd expect for the boost differences... It'll piss in 300rwkw with less than 20psi no doubt about that.

[Dearlove]

gtr kid,

i think you prob my lie in your 60'

from memory from my first and only time at quit i was doing 1.6 60's??? even when i was crab walking down the track at the start, also my first run i only got 12.9 but i was doing 180k's?? (was my first run, was really shit!! lol)

best time was 12.4 @ 170k's (will check that) on pretty stock gtr. run 17'' with 'triangle' tyre's lol

gotta go down there again some time, recon ill crack 11's easy coz my apexi boost controller was doing weird shit, so i took it out

[R31Nismoid]

A slower 60ft generally means a faster ET by a couple MPH

[R33GTRKid]

how can that be?

if you have gone slower over the first part of the track, you have not accelerated as quickly so how can you then make up for that reduced acceleration.

Final speed = acceleration over distance, the distance stays the same, so if you accelerate over the first part slower (hence slower 60 foot time) how can you catch back up to go faster?

doesnt the head wind make a considerable difference also? it was a howling wind, you stood up and were getting blown around. As I said before, not many people were going faster but with considerably claimed higher power