The Automatic DB8
The second Integra I am looking at in this article is an
automatic DB8. Khu bought this in very good condition as a 6 year old
un-registered example, during the bottom of the currency crisis that hit
Malaysia a few years ago. Everyone have since envied his extremely good luck
since the price he paid at that time is actually lower than that being
asked for same-aged pre-owned used examples being sold now !
Khu has always maintained to me that he intends to keep his car
"stock". But I've always felt that he has a rather "flexible" definition of
stock. At the time Khu sent his car for dyno, he has a K&N cone filter
replacing the stock filter. B18C's stock filters are already conical in design
and the K&N could be used as a direct drop-in replacement, fitting nicely
into the stock air-filter box ! He also replaced his rear muffler box with one
from a stock 96-Spec Integra Type-R. Finally being a reader of TOVW, he fully
believes in injector cleaning and AFR benefits, so his injectors were cleaned.
He also purchased a used AFR for the car. Quite a handful indeed for a "stock"
Khu's Dynojet session came about when he was able to share a
block of dyno-time with some members of our Honda club. His intention was to
properly set the AFR for optimum air-fuel ratio for the local atmospheric
conditions, as well as to set the base ignition timing via the distributor.
Khu's dyno-chart is reproduced on the left. The base line run
showed around 116ps at the wheels, with a reasonably smooth power curve, except
for a dip between 6000rpm to about 6700rpm. This base-line run is for already
cleaned injectors, with just the AFR and base ignition timing to be set.
Adjusting the AFR plus setting the base timing allowed his DB8 to finally dyno
at almost 119ps at the wheels, once again spot-on the theoretical
In Khu's DB8 however, very significant gains were obtained all
across the rpm range, with especially good gains in the low and mid RPMs. Being
the sensible automatic driver, Khu was very impressed and happy with the gains,
since almost 8ps gains were recorded in the low rpm range of between 2500 to
4000rpm. This gives the car is much more spirited character for in-town drives
and especially beneficial for an automatic transmission.
In Khu's case however, we need to bear in mind that the
air-filter is an upgraded freer-flowing K&N unit while the muffler (exhaust
back-box) is the lesser restriction stock Integra Type-R one. Nevertheless, both
the items are not expected to produce great power gains, so taking into account
the power dip between 6000 - 6700rpm (which could have taken the max power to
120ps and beyond), Khu's DB8 do give us confidence to peg the power of a stock
automatic B18C to 119ps on a Dynojet machine.
I am very fortunate in being able to establish a working
relationship with the reference Integra site The Integra Dyno
Center. Our agreement is one where I am able to quote or use selected
material (with permission) from the site to complement and enhance my articles
here, while at the same time those article will also be highlighted at the 'Dyno
Center' as well. This is a very good working relationship and as a direct result
of the site's generosity, I am in the unique position of being able to use
material from the site to cross-check the materials I have in this article.
Although the site concentrated on U.S. model Integra GS-Rs,
there was a record for a JDM Integra SiR-G that was imported into Jamaica. The
owner reported a stock power run of 149ps at the wheels for his baseline value.
This run was recorded with the car exactly as it was received from Japan and
would thus corresponds directly with Mike's original (first) run of 148ps. As
can be seen, the two results corresponds to each other very well and this gives
us full confidence that Mike's results (as well as that reported in the Integra
Dyno Center) are fully representative for a typical DC2.
Based on the results examined in this article, we can thus feel
confident in establishing the following base-line reference :
- Stock Manual Integra SiRs will dyno around 153ps at the wheels
- Stock Automatic Integra SiRs will dyno around 119ps at the wheels
These reference values would prove invaluable to the enthusiasts
for many uses, especially when evaluating the power gain of a mod when the
baseline power is not available.
March 24 2001
© Temple of VTEC World