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article details
Author Shawn Church
Categories Dyno Testing, Civic
Create Date September 27, 2005 19:54
Last Update September 30, 2005 14:52
Dyno Testing the R18 Engine
Without further ado, take a look at the dyno test of our 2006 Civic EX 5MT Coupe

Note that the higher of the two runs was performed in 3rd gear. The lower was in 4th gear. Power and torque at the hubs indicate that this engine is producing more like 150-155 hp and 135-138 lbs-ft of torque at the engine. Also note that the power peaks and torque peaks correspond almost perfectly with the advertised peaks of 4300 rpm for torque and 6300 rpm for horsepower.

We also noted that the engine would occasionally knock at low rpms, indicating that it might indeed benefit from higher octane gasoline (all testing was done on whatever Honda delivered it to us with - probably 87 octane). Power was somewhat soft below 2000 rpm. We feel that this was probably due to the new small valve opening mode on the R18 designed for optimal fuel economy. Once you got to full throttle and above 2000 rpm, however, performance was brisk.

We have heard some doubt expressed about these numbers, so we thought we would see how the dyno results stacked up with acceleration testing. Our 0-60 testing returned consistent times in the 8.2-8.5 second range. Average acceleration in 1st gear was 0.47g with a 5000 rpm launch. From 4500 to 7000 rpm (the rpm range we accelerated through with a hard launch in first gear), average torque is about 113.5 lbs-ft at the hubs. From past experience, for wheels and tires of this size, a loss of 5-6 lbs-ft of torque is expected from hub to contact patch.

An average of 107.5 lbs-ft of torque, multiplied by a first gear ratio of 3.143 and a final drive ratio of 4.294 gives us a total torque at the axles of 1485 lbs-ft. The tire size of 205/55/16 gives us a tire radius of 1.04 ft. This means an average thrust of 1440 lbs in 1st gear. Our total weight for the car (2705 lbs) plus driver and equipment (230 lbs) was 2940 lbs. This amounts to an maximum average acceleration in first gear of 1450/2940 = 0.49g. While this is slightly higher than what was recorded, launches were performed with a great deal of wheelspin to keep the engine speed up, accounting for some error.


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Date Thread Starter Thread
12-02-2005 13:18 If my civic is 5AT.   (Score: 1, Normal) kenken3686
09-29-2005 01:06 engine mounts?   (Score: 1, Normal) kiwikungfu
09-29-2005 12:16 TonzX22
11-11-2005 09:53 munchiemond
09-29-2005 14:30 engine knock   (Score: 1, Normal) iwu
09-29-2005 21:34 Hondarific
09-30-2005 00:17 notyper
09-30-2005 00:19 OptimusPrimeXXX
09-30-2005 00:32 CSi
09-30-2005 02:40 anime_man24
09-30-2005 08:55 99SI
09-30-2005 10:22 watchdoc
09-30-2005 10:31 porky3
09-30-2005 11:14 iwu
09-30-2005 11:41 Hondarific
09-30-2005 13:57 watchdoc
09-30-2005 15:56 Hondarific
09-30-2005 16:06 iwu
09-30-2005 16:07 RyanDL
09-30-2005 16:21 Dren
09-30-2005 16:48 JeffX
09-30-2005 16:59 iwu
10-01-2005 20:36 foreverev3r
10-02-2005 13:45 rsmith
09-30-2005 17:11 porky3
09-30-2005 18:07 Hondarific
10-01-2005 09:38 watchdoc
10-07-2005 12:46 spicer
11-11-2005 09:50 munchiemond
10-02-2005 01:09 Speedo lag   (Score: 1, Normal) ipribadi
10-02-2005 13:31 rsmith
10-02-2005 20:07 semperfisc
10-02-2005 20:25 LilChowWow
11-11-2005 09:38 munchiemond
10-01-2005 01:34 Cracks   (Score: 1, Normal) TonzX22
10-01-2005 11:21 RyanDL
10-01-2005 11:40 TonzX22
10-01-2005 14:09 Price
10-17-2005 16:10 DoubleWishbone
11-11-2005 09:35 munchiemond
11-02-2005 20:15 r18 aftermarket   (Score: 1, Normal) RoninTalesDotCom
09-28-2005 11:00 136 hub hp for R18 it's good!   (Score: 1, Normal) civic_cx_92
09-29-2005 14:37 TonyEX
09-30-2005 00:19 notyper
09-30-2005 10:23 TonyEX
10-18-2005 17:55 hondaracer
09-28-2005 07:47 How does it compare to say, an Integra LS?   (Score: 1, Normal) 8000RPM
09-28-2005 10:10 DCR
09-28-2005 12:26 shingles
09-28-2005 12:39 8000RPM
09-28-2005 12:40 99SI
09-28-2005 13:13 notyper
09-28-2005 19:42 magueto
09-28-2005 21:27 anime_man24
09-28-2005 22:14 mystiklegendz
09-28-2005 23:54 cobalt
10-13-2005 21:53 Djaric
10-13-2005 16:54 One piece head/header?   (Score: 1, Normal) Djaric
09-29-2005 20:35 How about a dyno with the airbox off.   (Score: 1, Normal) Acuratuningx16
09-30-2005 11:45 JeffX
10-01-2005 11:35 uhhhh
10-06-2005 13:50 JeffX
09-29-2005 16:54 DX vs EX   (Score: 1, Normal) 96civicEX
09-29-2005 21:03 corey415
09-29-2005 22:39 DaBlackT
09-30-2005 11:22 96civicEX
09-30-2005 11:53 jeffbatt
09-30-2005 12:55 JeffX
10-02-2005 20:14 outersquare
09-30-2005 13:10 Driving91LX
09-30-2005 16:17 Dren
10-02-2005 05:17 Jordan5cyl
10-05-2005 12:05 revvit
10-05-2005 21:25 DaBlackT
10-04-2005 13:37 Wheel weight?   (Score: 1, Normal) Hondu
10-02-2005 00:39 comparison   (Score: 1, Normal) Rydin24inchdubz
10-01-2005 01:56 Cracks   (Score: 1, Normal) TonzX22
09-30-2005 23:04 Who is the guy in the vid, Shawn?   (Score: 1, Normal) harky007
10-01-2005 00:26 Stephen
09-29-2005 23:57 Are the assupmtions of flywheel horsepower slightly optimistic?   (Score: 1, Normal) Aaron97SH1
09-30-2005 00:15 notyper
09-30-2005 00:29 CSi
09-30-2005 02:46 anime_man24
09-30-2005 16:18 HONDA_99
09-30-2005 19:45 Aaron97SH1
09-30-2005 20:16 porky3
09-28-2005 15:44 Honda rating HP at the wheels now??   (Score: 1, Normal) hopeful_si
09-28-2005 18:31 notyper
09-30-2005 16:41 KaP TypeSH
09-30-2005 15:07 nice video   (Score: 1, Normal) civic_cx_92
09-30-2005 09:08 Just couldn't resist   (Score: 1, Normal) 6SPDTL
09-29-2005 11:30 137.9 hub hp with Air Conditioning on?   (Score: 1, Normal) 1atm
09-29-2005 11:58 shingles
09-29-2005 12:45 1atm
09-29-2005 13:01 8000RPM
09-29-2005 12:23 RyanDL
09-28-2005 18:10 Break in? Swap potential?   (Score: 1, Normal) cyisalwayshungry
09-28-2005 22:15 Hrandy
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