Local club was having a dyno day so I decided to see what the old H23 could put down. We did 3 runs on a mustang dyno (dyno dynamic dynamometer). I had advanced the timing in the past but decided I'd rather make more power up top so on the last run we retarded the timing from 18 back to 15 and ended up with the best run of the three (added a few HP across the top. And now I can save myself a few cents running 91 octane again ). Mods are I/H/E.
Max HP: 138.5 Max Torque: 144
Hp & Torque:
Hp & AF:
I'm pretty happy with the numbers given that it's a mustang dyno and most SI's with these mods are between 140 and 150 on dynojets. Thought the AF looked pretty good until open loop fuel dumpage begins.
I'm not exactly sure what the H23 should be putting down but I thought it would be less than that....even with I/H/E. Now I wanna go dyno my H23....wonder what I'd put down....hopefully about the same numbers.
your curves look nice. altho i think you should be making a lil bit more. What year is your lude ? what do you have done to it? Mine is a 93 Si with 170xxx miles, i/h/e as engine mods for power, the ignition stuff doesnt really make power, and i m makin 150 in power and torque on a mustang dyno with 80 F outside temp. I havent seen many h23 dynosheets, so i ve always wondered if my motor was just freaky. I know prelude2sin is makin 160 with the crower cams, other than that, most i see is vtec, so i m curious to know what u got done.
my dynosheet
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your curves look nice. altho i think you should be making a lil bit more. What year is your lude ? what do you have done to it?
Yours are really nice numbers. Most SI's I've seen are between 140-145 with I/H/E. But it's really hard to compare across dynos, they're all a little different. Your pulleys should be giving you a few more HP too though. And what about the SAFC - did you tune that?? I'm curious if that helped you out much and whether I should consider it. It would be nice to tune out some of the fuel up top.
I have a rebuilt H23 that has about 50K on it. Iceman intake, DC header, Apexi exhaust.
^^^ yea the sfac got tuned, but only leaned out bout 1% across... its not much, since theres not much to make power from. any thing over 1% accross the rpm range, the car didnt like it as the guy was tuning it. I was considering rebuilding my h23 cause i thought with that many miles, it was bout that time, but after that dyno, i dont see a reason why anymore so i m just ridin it. I ll dyno it every 6 month or so until i notice a decrease, then ill rebuilt and go turbo.
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NOTE:
My domain name has changed. If any pics I have posted in the past appear to be missing you will need to copy the old link of the image(right click on the red X or not found link and click view the properties of the image, or quote my post to get the URL), remove the gzone.homelinux.org part, and replate it with thegzone.net/old_site/. Thanks.
just wondering if you are going to drop some crower cams in there?
Haha, don't tempt me man!!! I'd love to but don't think that will happen, at least for a while.
Exodus - ya, mustangs are generally more conservative. I'm not really too concerned with the peak, I just wanted to make sure the car was putting down the power pretty smooth and that the fuel system was ok.
i dont know if its just my car, but my experience on the dyno jet was weird, i guess it musta been a bad day or something. i dynoed with my same mods listed on my dynosheet above about a year ago, and iput down 141hp and 141 torque, at a colder temp, i think it was 61F outside temp, and i had a lot less miles ( around 150k, compared to now at bout 170k) than i did 3 months ago on the mustang dyno(at 80F).So from what u guys as saying, i should be puttin more than 150 on the dynojet...hmm either way i always believe my motor was a freak , oh well i dont know. here is the sheet from a year ago.
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NOTE:
My domain name has changed. If any pics I have posted in the past appear to be missing you will need to copy the old link of the image(right click on the red X or not found link and click view the properties of the image, or quote my post to get the URL), remove the gzone.homelinux.org part, and replate it with thegzone.net/old_site/. Thanks.
^^^ dont get caught up comparing them two dynos because it is common to see higher # on a mustang dyno than on a dynojet and vice-versa... there are a couple of threads on ht.com that talk about this...
__________________ 1992 PRELUDE Si
217whp, 224wtq
NOS Dry Manifold System
.037"jet@ 750psi NA: 161.8whp, 158.2wtq
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). Mods are I/H/E.
, oh well i dont know. here is the sheet from a year ago.
Linear Mode
