JDM H23 VTEC (Blue Top) Dyno Results
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JDM H23 VTEC (Blue Top) Dyno Results
Hey everyone,
I've recently finished my JDM H23 VTEC Blue Top engine swap into my '97 Prelude Base 5-speed. The engine is completely stock, including injectors. I have my dyno sheet listed below, following the bolt-on modifications at the time of the dyno tune.
The setup produced 202 whp, 170 wtq with VTEC engagement set at 4900 rpm.
What I'd really like to know is if there is anyone out there who has 100% stock dyno results, with no modifications whatsoever... stock intake, exhaust, fuel system, bone stock. I'm curious as to how my current modifications are effecting the engine's efficiency.
Also, I've heard rumors that using a Mustang Dyno for a front-wheel-drive tune can effect the results given. I know that each dyno system reads the engine's variables differently. Could the results be more accurate or "true" on a different dyno system?
Here is my list of information and dyno sheet.
Details are:
AEM CAI
AEM fuel rail with AEM fuel pressure regulator
(Polished) Skunk2 Pro Intake Manifold
Hondata Intake Manifold Gasket
Bone Stock P13 H23VTEC Blue Top
RMF Replica 4-1 stainless steel exhaust manifold
Custom 2.5 mandrel bent exhaust, no cat, two dynaflow resonators
Apexi WS2 N/A muffler
Walbro 255 lph fuel pump
Hondata S300 chipped P72 ecu
I've recently finished my JDM H23 VTEC Blue Top engine swap into my '97 Prelude Base 5-speed. The engine is completely stock, including injectors. I have my dyno sheet listed below, following the bolt-on modifications at the time of the dyno tune.
The setup produced 202 whp, 170 wtq with VTEC engagement set at 4900 rpm.
What I'd really like to know is if there is anyone out there who has 100% stock dyno results, with no modifications whatsoever... stock intake, exhaust, fuel system, bone stock. I'm curious as to how my current modifications are effecting the engine's efficiency.
Also, I've heard rumors that using a Mustang Dyno for a front-wheel-drive tune can effect the results given. I know that each dyno system reads the engine's variables differently. Could the results be more accurate or "true" on a different dyno system?
Here is my list of information and dyno sheet.
Details are:
AEM CAI
AEM fuel rail with AEM fuel pressure regulator
(Polished) Skunk2 Pro Intake Manifold
Hondata Intake Manifold Gasket
Bone Stock P13 H23VTEC Blue Top
RMF Replica 4-1 stainless steel exhaust manifold
Custom 2.5 mandrel bent exhaust, no cat, two dynaflow resonators
Apexi WS2 N/A muffler
Walbro 255 lph fuel pump
Hondata S300 chipped P72 ecu
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Its difficult to find informative dyno sheets for this engine. Is there anyone at all who can provide a dyno sheet, or personal experience?
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Re: JDM H23 VTEC (Blue Top) Dyno Results
I'm aware that many variables come into play, however, with enough information it could be determined what an estimated average might be.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Agreed.
1. You can't compare different dyno's, they all read differently. Mustang dyno's generally read low. My modded(untuned) AP1 only put down 189 on one, the AP1 after me only made 174. On most other dyno's it would have been around 200-210.
2. Mods play a role in this. Some are for mid-range, some for top-end ect. Different combo's yield different power-bands.
1. You can't compare different dyno's, they all read differently. Mustang dyno's generally read low. My modded(untuned) AP1 only put down 189 on one, the AP1 after me only made 174. On most other dyno's it would have been around 200-210.
2. Mods play a role in this. Some are for mid-range, some for top-end ect. Different combo's yield different power-bands.
#7
Re: JDM H23 VTEC (Blue Top) Dyno Results
Forget about other dyno's.
No doubt your mods made more power than a stock motor would have, mainly the tune with hondata vs. a stock ecu.
If you were a guessing man, you could probably guess that with your mods/tune, your probably putting down about 20+ whp over a stock motor/ecu.
And yes mustang dynos generally tend to read lower than dyno jets, 202 whp on a mustang probably equals about 220 whp on a dyno jet, very good numbers for bolt on N/A, as much or more than most turbo D motors running a stock motor on lower boost.
No doubt your mods made more power than a stock motor would have, mainly the tune with hondata vs. a stock ecu.
If you were a guessing man, you could probably guess that with your mods/tune, your probably putting down about 20+ whp over a stock motor/ecu.
And yes mustang dynos generally tend to read lower than dyno jets, 202 whp on a mustang probably equals about 220 whp on a dyno jet, very good numbers for bolt on N/A, as much or more than most turbo D motors running a stock motor on lower boost.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Thanks for the knowledge. I've worked on Hondas quite a bit, but when it comes to tuning, I dont have a clue.
The problem I've been having is there isn't a whole lot of solid information for the blue top H23. Hmotors online claims the engine produces 215 hp stock, while some other resources say the engine sits at 197. You can say that I'm jus trying to stir up some more information, from people who have the engine, or can provide solid facts.
Thanks for clearing up the Mustang Dyno vs Dynojet question. The Prelude deffinitely feels like it has more than 30 whp over the USDM H22. I'm glad there is an explanation for this.
The problem I've been having is there isn't a whole lot of solid information for the blue top H23. Hmotors online claims the engine produces 215 hp stock, while some other resources say the engine sits at 197. You can say that I'm jus trying to stir up some more information, from people who have the engine, or can provide solid facts.
Thanks for clearing up the Mustang Dyno vs Dynojet question. The Prelude deffinitely feels like it has more than 30 whp over the USDM H22. I'm glad there is an explanation for this.
#9
Re: JDM H23 VTEC (Blue Top) Dyno Results
I dont know much about the blue top, but I did know a guy about 6-7 years ago that had a crx with an H23 non vtec bottom end, with an H22 head. It was just bolt ons and tuned, if I remember right it put down something like 210 whp on a dyno jet. All I know is that motor in a crx was a FU*$ing BEAST. It pulled as hard as some turbo B civics and integra's that I had ridden in.....Mad torque was FTW.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
I dont know much about the blue top, but I did know a guy about 6-7 years ago that had a crx with an H23 non vtec bottom end, with an H22 head. It was just bolt ons and tuned, if I remember right it put down something like 210 whp on a dyno jet. All I know is that motor in a crx was a FU*$ing BEAST. It pulled as hard as some turbo B civics and integra's that I had ridden in.....Mad torque was FTW.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
I also have this swap in my 2001 Prelude. The torque is incredible. Feels beefier than my H22Z1.
I am contemplating buying a chipped OBD1 ECU to tune on Crome. I'm just not sure its worth it when I have a stock engine. I only have boltons at the moment: AEM V2 intake, MaximWorks header, and Mugen twinloop.
I will post my dyno sheet here if I end up doing it
I am contemplating buying a chipped OBD1 ECU to tune on Crome. I'm just not sure its worth it when I have a stock engine. I only have boltons at the moment: AEM V2 intake, MaximWorks header, and Mugen twinloop.
I will post my dyno sheet here if I end up doing it
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Andoxviii, sry I haven't been on here recently. School has been requiring much of my free time. I've read a few of the H23 Blue Top threads, and from what I've gathered so far, members have reported that the PDE head appears to have been mildly polished by the factory. The casting inside the intake and exhaust are more smoothed out and less prominent than those on the P13 head. However, I have yet to find any dyno results proving that this difference can improve performance between the two heads. If tbere are any differences at all in performance, I believe it would be minimal due to the remaining specs of the two heads being identical. So to answer your pm question about the PDE head, I wouldn't think that swapping your P13 for a PDE would prove any results worth spending the money or time.
And about whether to use the stock OBD2 ECU for tuning vs converting to OBD1, I would highly recommend that you convert over to OBD1. From what I can remember, OBD2 tuning hardware and software is scarce and expensive. The options for tuning with OBD1 are endless and affordable.
And about whether to use the stock OBD2 ECU for tuning vs converting to OBD1, I would highly recommend that you convert over to OBD1. From what I can remember, OBD2 tuning hardware and software is scarce and expensive. The options for tuning with OBD1 are endless and affordable.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
So I went ahead and bought an OBD2A-to-OBD1 conversion harness and a chipped P06 (with IAB and VTEC added) before I read this... right now, the program loaded on the chip is for an H22A, but scaled up a bit to make up for the extra 0.1 L of displacement. I wouldn't even consider tuning OBD2, by the way. Far too expensive. The only issue I'm having with this setup is that I set the CEL shift light to 7200 rpm and the rev limit to 7500 rpm, but my OEM tachometer shows 7800 rpm when the shift light turns on and 8000 rpm when the fuel cuts. So I guess the only explanation is that my tach is horribly inaccurate??
I will be heading to Splitfire Performance to tune on the weekend of May 5th. Hopefully my numbers are almost as good as yours. I have I/H/E, but I'm running the stock H22Z1 intake manifold and fuel system. I will post my numbers here when I have them.
I'm also thinking I want to see the dyno results running the stock OBD2A P5M ECU. I will see if he can do a quick dyno pull beforehand.
I will be heading to Splitfire Performance to tune on the weekend of May 5th. Hopefully my numbers are almost as good as yours. I have I/H/E, but I'm running the stock H22Z1 intake manifold and fuel system. I will post my numbers here when I have them.
I'm also thinking I want to see the dyno results running the stock OBD2A P5M ECU. I will see if he can do a quick dyno pull beforehand.
#14
Re: JDM H23 VTEC (Blue Top) Dyno Results
Not completely stock but internally OEM:
Stock H23 VTEC Block 10.6:1 CR
Euro-R Head/Intake Manifold
Ebay Cam Gears
Ebay Short Ram Intake
3 inch crush bent into 2.5 inch exhaust
JDM Jasma approved Header(not sure what brand)
Tuned with Crome Gold
Red Line = Street tune base run
Blue Line = Dyno Tune final
Stock H23 VTEC Block 10.6:1 CR
Euro-R Head/Intake Manifold
Ebay Cam Gears
Ebay Short Ram Intake
3 inch crush bent into 2.5 inch exhaust
JDM Jasma approved Header(not sure what brand)
Tuned with Crome Gold
Red Line = Street tune base run
Blue Line = Dyno Tune final
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Not completely stock but internally OEM:
Stock H23 VTEC Block 10.6:1 CR
Euro-R Head/Intake Manifold
Ebay Cam Gears
Ebay Short Ram Intake
3 inch crush bent into 2.5 inch exhaust
JDM Jasma approved Header(not sure what brand)
Tuned with Crome Gold
Red Line = Street tune base run
Blue Line = Dyno Tune final
Stock H23 VTEC Block 10.6:1 CR
Euro-R Head/Intake Manifold
Ebay Cam Gears
Ebay Short Ram Intake
3 inch crush bent into 2.5 inch exhaust
JDM Jasma approved Header(not sure what brand)
Tuned with Crome Gold
Red Line = Street tune base run
Blue Line = Dyno Tune final
I really need to find a local dynojet and just make on pull. I need to figure out just how much difference there is between Mustang Dynos and Dynojets.
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Forget about other dyno's.
No doubt your mods made more power than a stock motor would have, mainly the tune with hondata vs. a stock ecu.
If you were a guessing man, you could probably guess that with your mods/tune, your probably putting down about 20+ whp over a stock motor/ecu.
And yes mustang dynos generally tend to read lower than dyno jets, 202 whp on a mustang probably equals about 220 whp on a dyno jet, very good numbers for bolt on N/A, as much or more than most turbo D motors running a stock motor on lower boost.
No doubt your mods made more power than a stock motor would have, mainly the tune with hondata vs. a stock ecu.
If you were a guessing man, you could probably guess that with your mods/tune, your probably putting down about 20+ whp over a stock motor/ecu.
And yes mustang dynos generally tend to read lower than dyno jets, 202 whp on a mustang probably equals about 220 whp on a dyno jet, very good numbers for bolt on N/A, as much or more than most turbo D motors running a stock motor on lower boost.
Does it not seem odd that your base tune horsepower numbers are higher than my fully tuned numbers, with a performance exhaust/header, Skunk2 intake manifold (polished), and cold air intake?
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Re: JDM H23 VTEC (Blue Top) Dyno Results
Thanks. Maybe I'm paying too much attention to the final numbers, and not the important factors of the tune.
I still would like to get a pull done on a DynoJet just to compare.
#20
Re: JDM H23 VTEC (Blue Top) Dyno Results
Hey just picked up my h23a last Saturday going h2b with dual stage nitrous, I'm not a noob or to lazy to search. I spend few hours each day researching various Honda related things, anyway that being said mayb I can get a quick answer. I'm finding conflicting info on the h23a. Just trying to see what the cam specs are, mine is a p13 head
#22
Re: JDM H23 VTEC (Blue Top) Dyno Results
I'll be putting one in my CRX with 4.7 fd LSD ITR trans, QSD H2B kit, custom a/c, and custom hood. Look for the build thread in mid December.