Honda / Acura K20a K24a Engine Forum banner
1 - 20 of 20 Posts

·
Registered
Joined
·
739 Posts
Discussion Starter · #1 ·
Yesterday at a local car show they had a dyno jet setup and were charging $50 for 3 pulls. Well I did it to support my friends who were holding the show, turns out that my motor is getting stronger or something from last time i dynoed it. 1st time I dynoed the car on a dynapack it put down 178whp and 135ft. lbs untuned on a rsx-s w/ intake basemap. now a few months later out in the middle of the heat it put down 191whp. and 147 ft. lbs. I am very impressed with my engine to be untuned. The motor is a k20a2 from a 02 type s, my mods are a very short intake (90* turn back towards the tranny) a shitty hasport header, and a 3" exhaust from my 2.5" test pipe back. I cant waint to get some skunk cams and some tuning.
 

·
Registered
Joined
·
537 Posts
Well Im glad you see numbers that you like.

Imo however theres to many variances between the two dynos for comparasion purposes. In reality even testing your car on another dyno jet or dynopack could yield different figures.

Im not saying that your engine didnt increase power over a break in period but that a truer comparasion would be to run it again on the original dynopack.

Im sure you know this but fyi anyways, Dyno's show hp figures as a measurement of power made at the wheel, hub or flywheel. While things like humidity and temputure can effect what a dyno reads so can different tuners (well at least ones that want to sway the numbers).
But overall its for tuning purposes, generally on the same dyno so one can tell if a mod or adjustment has really increased anything at all.

THe other thing that I think messes with dynos is elevation. I realize that dynos compensate for this but Ive heard alot of guys (I live at a pretty high elevation) mention that there cars dyno higher at 1000 ft than at say 5000 ft.
 

·
Registered
Joined
·
433 Posts
Maaaaan....how come you photoshopped the license plate out...now I can't come steal it and take it for a joyride. Thanks alot man, way to be a team player.

Josh...good numbers bro, way to rep the K at the show.
 

·
Registered
Joined
·
10 Posts
This was never powered by the Toyota engine. It was originally powered by a Rover engine like was stated above. The Toyota engine was used so that the MK. II could meet US emissions. I would take the 2ZZ-GE over the Rover K-series any day but a K20A in there is just about the perfect combonination. On a side note, I wish that lotus would have considered the 2.0L BEAMS 3S-GE VVTi instead of the 2ZZ. It would probably be much more fun.
 

·
Registered
Joined
·
739 Posts
Discussion Starter · #12 ·
i knwo different dyno's yeild different numbers but just about everyone I know that tunes tunes on a dynojet. The dyna pack that I had run the car on is the one that is fishy.
 

·
Registered
Joined
·
285 Posts
mr2guy said:
On a side note, I wish that lotus would have considered the 2.0L BEAMS 3S-GE VVTi instead of the 2ZZ. It would probably be much more fun.
Toyota still makes that? Well, from what ive read the BEAMS motor is rare as hell, but in a Lotus that would be nice.
 

·
Registered
Joined
·
185 Posts
I have the same conversion in my car. The Rover engine is actually not that bad, it's very light which is what you want in a car weighting only 1600 pounds. It has a bad reputation for being unreliable at 200hp+, but there are examples producing over 240hp (flywheel) which ain't bad for a 1.8. Lotus basically had to take what was offered when they produced the new US certified Elise. Honda wouldn't sell them the K20 because it would compete with the S2000 and the Rover engine was not certified for sale in the States.

Back to the dyno chart, firstly a dynapac is an excellent method of measuring hp second only to an engine dyno, because you're removing the tyres from the equation. Unfortunately a lot of tuners use Shawn Church's dynapac which for whatever reason always reads a lot higher than other dynapac's (and other dyno's) - good for the tuning companies I suppose. My engine on a dynapac in the UK made 200hp at the hubs compared with 247hp for another engine configured exactly the same on Church's dyno. That doesn't mean that you should ignore the results from his dyno just that you should compare the percentage difference between the before and after rather than look at the actual numbers.

I wouldn't read too much into the figures at the beginning of the thread, two different dynos, different conditions and done some time apart. In fact any number from a dyno is pretty meaningless; the only way of correctly determining engine power is to use an engine dyno. A normal dyno is simply a useful tool for comparing changes - the numbers can be anything, it's the percentage difference from one run to another preferably done at the same time that matter (and the shape of the graph).

Hope that makes some sense.
 

·
Registered
Joined
·
739 Posts
Discussion Starter · #17 ·
yea, I know what your saying. I am going to believe the numbers off the dynojet over the dyna pack though. I have a buddy with a turbo b series and they "tuned" the car and it was making [email protected] psi on 110octain. EVERY other dyno that he has been on the car dyno's in the high 300's. He dynoed his car about an hour before mine and the weather was about the same, fairly hot and dry. He put down 387whp but that was at 16.5psi. The dyna pack that we both have dyno'd on is inside and is in a controled environment in their shop area.
 

·
Registered
Joined
·
39 Posts
Good numbers man. I hope the same if not better for mine. Hate to stray from the trend but which DTA (ECM, ECU)is that? The PRO 8? And does the DTA (ECM, ECU) control the VTEC and VTC? This is some thing i have been looking at for a little while, but not sure if it is a good alturnitive to K-Pro. Anyways nice car and good numbers. Rock-on bro. :cool:
 

·
Registered
Joined
·
8 Posts
I have the PRO8 DTA installed, yepp.
And the shift-light of the DTA controls the VTEC-setpoint, cause i have another shiftlight in the Stack-Display :)

And to me, dynonumbers are to re-check the own car and also should never been over-valued :)
 

·
Registered
Joined
·
475 Posts
true
 
1 - 20 of 20 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top