TheShodan

iTrader: (14)

But not by the amount he's claiming. The wheel HP measure vs. crank hp or brake hp is what is the confusing factor here, even after Xenocron's analysis.

koczeka

For your eye calibration... made today.

Before:
Power: 196,5 PS / 177,6 Nm
B18C6: 2300km engine
Cat: nope
Header: stock EDM
Catback: Apex'i N1
ECU: stock EDM
Intake: stock

After:
Power: 204,4 PS / 180,7 Nm
B18C6: 14000km engine
Cat: JDM 98' Spec-R
Header: stock JDM 98' Spec-R
Catback: Spoon N1
ECU: JDM 98' Spec-R
Intake: stock

OUTOFTHEGROOVE

who needs a stroker crank when u can buy a set of injectors...

guess i will need to test some rc's against the id's this winter in a controlled environment again and show it takes alot more than upgraded injectors to produce 20+ whp from a n/a setup

OH_1fstgsr

iTrader: (2)

Here is another example. Gained 8-9whp
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/bosch-900cc-injectors-vs-rc-550cc-2687802/

MikeySpec

One one of my tests that had a similar basis we made 5-6whp over RC 550's by switching to ID 725's.The main cleanliness in the graph along with about 1-2whp gain was from bumping up the fuel pressure from 45 to 60.

This was on a Honda Challenge H2 car making a total of 192whp after the injector swap

OUTOFTHEGROOVE

^^^these results have been what myself along with many others have seen from extensive testing of the id's vs old rc technology, anywhere between 5 to 10 whp.

the few who claim 15 and 20+ whp gains are not making these gains from swaping injectors alone although they may honestly believe they are lol

if i have the chance this winter i will show u guys what a set of rc 550s will do against the id 725s in the same setup, on the same dyno, back to back on the same day. this will be on a 90x95mm setup which will make around 330whp. the ids will definately gain, but not 20+whp lol

PyroProblem

This makes sense to me. I would love to see another test of before and after dynos. I read nothing but good things from members on here. Cant wait to get me a set.

I guess there was just some confusion in the Hungarian HP/PS/KW conversion to American Wheel Horsepower, but nonetheless a gain is a gain so congrats to you Koczeka

TheShodan

iTrader: (14)

I would concur with this, yes....

unusual71

unless you are measuring AFR at each cylinder you're getting an average value, maybe one injector was coming up a little short and thus the big gain after the swap