Like the title states, those are my only engine mods. I had previously dyno'd the car before last year (at another location) with just AEM CAI and USDM DC 4-1.. pulled ~164hp/114tq.
I have swapped out those new mods since and have a Comptech Icebox, JDM 4-1, 2.5" Carsound cat, and a 2.5" SMSP catback (thanks Ed + Dave).
I've had the IceBox and JDM 4-1/Carsound cat for a few months already... I put the SMSP catback in just this past Friday (4 days ago) and resetted the ECU. I go get dyno'd today, hoping to break mid-high 170s. However, this was my end result (after tweaking the V-AFC)



Large image here: http://www.we-todd-did-racing.com/we...MxeTU0MQ%3D%3D

The car has 68K miles on it... full maintenance/tuneup was done at 60K service. Timing is at 18 degrees... running Redline 10w-30 (been in there for ~1200 miles including a HPDE track day). 15x7 Volk TE37s with 205/50/15 Azenis.
The lowest reading on the dyno (162/115) was a dyno of everything as is. That's lower than what I had dyno'd with the AEM and USDM DC 4-1!
After some tuning with the VAFC (+2 fuel from 5000-7000... -8 at 8000), it "max'd" out at 169/121.
I'm pretty disappointed with the peak HP numbers vs what other people have been getting with the same setup. It seems like there is still some sort of restriction somewhere??
The mid-range did pick up considerably vs. my old dyno (10-20whp increase)...

Any thoughts? Suggestions?


[Modified by 98R-1144, 3:56 PM 12/31/2002]

 

Yeah, I wouldnt be too concerned about peak #s.

Stock owns. I dyno'd 165.6/121 about 2 weeks ago. No biggie. Just enjoy your car.

 

Sorry to see these initial disappointing numbers, some A/f numbers would be a little bit more help in diagnosing the situation (using a wideband O2 sensor).

It was good to see that you got a nice jump in the mid-band, and that should also have carried on up to peak at 8-8.2K RPM.

Don't worry, it's never easy.
I've been working on the turbo since March, and now it's been motorless for a few weeks.

Next step is to get an AEM FPR, and do a couple runs with a wideband with the A/F logged along with (below) the power and engine speed.

Happy New Year! Ed

P.S. here's the link to George's dyno post: https://honda-tech.com/zerothread?id=157886


Haw, what type of dyno was it?


[Modified by Zygspeed, 7:19 PM 12/31/2002]

 

theres nothing wrong with your car, thats how much i dyno'd with a cai/jdm header. you probally just need some tuning. btw the jdm header is OVER-rated.

 

I don't really know too much about this sort of thing, but wouldn't using 5W-30 oil over 10W-30, make some sort of difference. I thought 5-30 was the proper oil to use.

 

I would say thats about right with that set up. I think Nate Bizzle hit around those numbers with close to the same set-up. And he also did some cam gear tuning

 

I think you're tight valve adjustment helped more than you'd expected!

Maybe George was using a generous correction factor.

 

Yeah, grandpa is the only car I seen put down numbers like those on pretty much the same set-up. He's got naaaaaaws y0(hehehe).

 

danielson......one must remember that not all dyno's are the same....in fact they will vary up to 25% difference on the same day at different dyno facilities....best deal is to use the same shop for every run.....even then you are not guarenteed as to absolute perfection...

the dyno is a tuning tool, if you are looking for just peek numbers you need to rethink things

130 tq at 3000 that's where the pull power is at (at the end of a preposistion)

it's all about 3rd gear vtechk yo

 

at an autocross......


but they're right, you're peak numbers may be 'low', but they dont really matter.

 

Fo shizzle y0, thats what Im talkin bout

 

look at that mid range gain!! good bumbers man! it was good to see ya again.

-graham

 

I have the same set up as well just I have HONDATA and tunning and i put down and the cams are set a dead 0 all stock internals aswell




[Modified by underrated99si, 9:45 AM 1/1/2003]


[Modified by underrated99si, 9:46 AM 1/1/2003]

 

a lot ppl owning a type R with 200+ whp, now ppl know it's not easy.

bigger pipe won't make big dif without motor build , GL

 

Ed,
It was on a Dynojet 248H. It was pretty cold in the morning.. 50-60 degrees? And it actually did log the AF... I just forgot to ask him to print me out a copy with the AF on it. I'll swing by Thursday or Friday to see if I can get a printout of that as well. Lawrence (the dyno dude) said that the AF was pretty much flat across the rev band.
As for the mid-band bump, I thought for sure it would carry up thru the upper revs as well.
It seems like (to me) that something is still holding it up top?
BTW here are some vids:
The first one is of the RPMs... Vtec is set at 4900 on this one I believe. There is a hissing sound around that time... is that from the wideband O2 sensor?
http://www.imagestation.com/picture/...f/fcdb48a6.mpg

This second one is from the rear:
http://www.imagestation.com/picture/...f/fcdb4bdf.mpg


[Modified by 98R-1144, 9:29 AM 1/1/2003]

 

Nice MPEGS, was that the rev-limiter kicking in at 9K on the tach?

I'm all out of suggestions at the moment.
About some hissing ... there did seem to be something in the background noise.
Where did they put the O2 sensor? In the 2nd O2 sensor area?

 

yeah the stock tach was pretty off.

the only sensor i saw them use was the one they shoved into the muffler

 

Well Haw, must me time for CTR pistons and/or cams!

 

nice videos! who made them? i bet Graham was there to video tape!


[Modified by jeff652, 12:12 PM 1/1/2003]

 

There ya' go!

 

To prevent un-wanted power surges when exiting a low rpm corner.

Post (with specs):
https://honda-tech.com/zerothread?id=301071&page=2
-----------
Mods:
-JDM 4into1 header (mild port job on the inlet t00bs)
-SMSP cat
-stock cat back has a SMSP taper cone installed at the inlet
-VAFC
-power steering belt removed
-stock air filter was removed from the air box (laying on top)
---------

Plot:

 

I honestly don't think dyno charts from different machines from different locations can be compared. +/- 5hp to 10hp is not uncommon.

From the last Chicago dyno thread, however, can give the most accurate "comparison" cuz they had many dyno results of different cars/setup with the same machine, same location, and even same weather condition.

 

A little lower, but in the ballpark. With a Dave exhaust, I probably would have been very close to George numbers.

AEM CAI, V-AFC (Yack-tuned), JDM Honda header, 2.5" cat. Nice, smooth transition. Hump around 4k is the AEM talking.

 

Funny to think that 5,000 rpm is a "low rpm" corner

 

Well it sort of is when the ITR revs to what looks like 10K rpm with a Mugen ECU!