how can you tell if its ported?

Started by rx-paul, October 23, 2006, 12:49:43 PM

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sadgoth

#15
October 24, 2006, 09:59:11 AM
Quote from: trevtubbyoh right ok, I thought every car would be different though, didnt think they would just use the same % for any car with the same type of drive.

ah well nevermind lol.

That is what the article says, every car is different so without actually using an engine dyno, you can\'t get a totally acurate FWHP figure but, as an average you can use the following calulations to work out FWHP from WHP

RWD: (RWHP + 10bhp) / 0.88
FWD: (FWHP + 10bhp) / 0.9
4WD: (WHP + 10bhp)  / 0.84

tire pressure has a big effect on transmission loss as well.
Mark
89 Black FC3S Turbo II
1/2 Bridge port   Microtech LT10s   TII Conv Aluminium Bonnet & Leather seats   Koni Shocks Pi Springs   De-catted 3" exhaust  
GT4088 turbo   Walbro fuel pump   1000cc injectors   custom V-Mount   Blitz Boost Controller (ok so the boost controller is still to fit)

Loud? Hell yes! :D

sadgoth

#16
October 24, 2006, 09:59:51 AM
The article make for very interesting reading
Mark
89 Black FC3S Turbo II
1/2 Bridge port   Microtech LT10s   TII Conv Aluminium Bonnet & Leather seats   Koni Shocks Pi Springs   De-catted 3" exhaust  
GT4088 turbo   Walbro fuel pump   1000cc injectors   custom V-Mount   Blitz Boost Controller (ok so the boost controller is still to fit)

Loud? Hell yes! :D

nikp

#17
October 24, 2006, 10:14:37 AM
Jeez - i just seen that that printout has a corrected power of 360! That\'s 110bhp more than the wheel figure!! :eek  That\'s 31% transmission losses!

AshRX

#18
October 24, 2006, 12:40:57 PM
nik is right

when i have the skybus dynoed i lost 22% through the transmission

353 @ the wheels and 453bhp at the flywheel

John Yorke

#19
October 24, 2006, 01:50:13 PM Last Edit: October 24, 2006, 01:54:15 PM by John Yorke
Quote from: rx-paulhi had this dyno done saturday at powerstation can you tell if your engine has been ported fron a dyno?


mod are
knightsport ecu
knightsport boost controller
hks downpipe
de-cat
titanium cat back
air pump removed
lightened pullies
waldbro fuel pump
ran at 0.9bar on v-power

Almost certain that is not ported peek power would be higher up the rev range [7-8k band]
The figures are all over the place going on your mods 250 / 260 whp would be expected which equates to around 300ish fwhp. Oh and if this is a fresh import with the Knightsport ECU be very carefull they are pre-programmed to run on 100octain and have been known to let go, my advice would be to get it checked out by one of the specialists WGT would be the closest to you.

nikp

#20
October 24, 2006, 01:57:07 PM
Pip would most likely say bin the ECU- he doesn\'t have any respect for them pre-programmed/mapped ECU\'s.

iaint

#21
October 24, 2006, 02:22:38 PM
Quote from: nikpPip would most likely say bin the ECU- he doesn\'t have any respect for them pre-programmed/mapped ECU\'s.

Not many tuners do :)

IIRC Carl once said it\'s ~18% or 55bhp to convert to flywheel from the measures rwhp figure.

My mate\'s GT4 has around 25% powertrain losses in comparison!

It\'s in the interest of the dyno people to have big number quoted as it\'ll get their name mentioned more - if you have a poor figure you\'ll keep quiet about it...

"The way to do is to be." - Lao Tzu

BlitzBoy

#22
October 24, 2006, 04:35:43 PM
all Im concerned with is how much power the tarmac is actually seeing who cares what the engine is making at the flywheel. Anyways a dyno is only a tuning tool at the end of the day when you make a mod go back to the same dyno to see if its made a difference
"Piston Killa" 3rd Gen\'94 \'Oldone Racing Full Bridge Ported REW 13b engine with SCR seals\'. HKS T51 KAI turbo BBM mapped Motec ECU

JDS/HKS Street Class Championship Runner up 2011
Rotorstock winner 08,09
http://pistonkilla.blogspot.com/
old spec HB T51 470 @ wheels @ 1.2 BAR, 555 @ fly 10.46 @ 130 @ 1.25 Bar
new spec FB T51 482 @ wheels @ 1.15 BAR, 570 @ fly

New Project
"el fénix" RX2 by Mark & Mark

nikp

#23
October 24, 2006, 04:50:37 PM
Quote from: rx-paulhi had this dyno done saturday at powerstation can you tell if your engine has been ported fron a dyno?

I bet you wish you never asked the question now!! :) Still, you hopefully know a bit more now!

DRAGON

#24
October 24, 2006, 05:03:56 PM
Quote from: iaintNot many tuners do :)
QUOTE]
I do, specially FEED, Panspeed, knightsports, run one on one of my own cars.

RemarkLima

#25
October 24, 2006, 05:17:46 PM
RE power losses, I heard that 4WD will loose a lot more through the transmission than a 2WD car, so the ~18% for RWD /  FWD and then ~25% for 4WD stuff...

But as people have said, it\'s a tuning tool to get the car running right, you can only really compare power on the same dyno on the same say IMHO.
Montego Blue 94 R2 FD3S... Bling not included.

rx-paul

#26
October 25, 2006, 10:08:03 AM Last Edit: October 25, 2006, 10:10:50 AM by rx-paul
Quote from: nikpPip would most likely say bin the ECU- he doesn\'t have any respect for them pre-programmed/mapped ECU\'s.
the ecu is one of the things holding the car back and have a power fc on order

nikp

#27
October 25, 2006, 10:12:09 AM
Good move!

iaint

#28
October 25, 2006, 12:43:49 PM
Quote from: DRAGON
Quote from: iaintNot many tuners do :)
I do, specially FEED, Panspeed, knightsports, run one on one of my own cars.

Which one and is it safe on normal fuel?  Have you upped the fuelling pressure to \'fool\' it into providing safe fuelling under boost?

Enquiring minds want to know! :)

"The way to do is to be." - Lao Tzu

rx-paul

#29
October 26, 2006, 10:55:06 AM
Quote from: iaintWhich one and is it safe on normal fuel?  Have you upped the fuelling pressure to \'fool\' it into providing safe fuelling under boost?

Enquiring minds want to know! :)

i havent encountered any fueling problems yet but after looking at the e-mail i got back from knightsport japan iv found that the ecu is only mapped to run with
back box
arc induction kit
cat in place
knightsport boost controller
and the air pump removed (dissconected)

so im streaching it way over it map
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