First off, let me say that these are MY dyno numbers, for MY car: Your results and opinions may vary, and that's all fine and dandy. Also, we Dyno at Speednation , which uses a Mustang Chassis Dyno, a different animal than the DynoJet Dynos that are far more common...Mustang Dynos read very low compared to Dynojets, so the fact that my peak HP is near 150 doesn't mean I have the slowest Type R on the planet...other ITRs (including D's) dyno right there, and ours aren't slow. And finally, dyno runs between days and even months tend to be very consistent on the Mustang, but I didn't put the comptech on between runs, so there's been at least 1000 miles since the baseline. That said:




The Comptech (Full setup, short-ram, filter, and icebox) gave me a little bit of power down low (1-2 HP), about the same midrange, and a pretty significant increase up top (6-7 HP), in a fat, consistent curve. Shitbox my *** I'm extreemly happy with this result, and this was on a pretty warm day here in Pittsburgh, humid and in the 80s. It was worth my money, your experiences may vary.

The second curve shows what happened when we advanced my timing from its stock setting of 15 degrees to 18 degrees. FREE HORSEPOWER EVERYWHERE! Another 4 HP in big chunks, throughout the midrange, at its worst it's dead even with the 15 degree setting. Wait till you see what happened to D, whose timing was at 13.5 after more than 60,000 miles...needless to say we both had a good day.

 

I like my shitbox

 

actually, i'm extremely sick of the whole intake debate anyway, seriously, how much difference can there be in a 3" aluminum pipe with a K&N filter on it, short ram's especially.

just a sidenote, all you people who think they have a slow R, check your timing. I gained almost 5 hp across the board (prob a little more than that on top end) yesterday advancing timing.

Yeah aleph!!!! (oh, another sidenote - aleph, **** you and your damn light *** volks), oh yeah, and **** having the dealer do anything.

 

I think most people bad mouth Comptech because it isn't cheap, and you really don't get the performance many would expect to get with parts that expensive. I think Comptech makes good parts, but their parts are just not as aggresive as most others. But you really need to remember that with Comptech you keep your warrenty

Maybe I will pick up an Icebox now that I see it actually does some good. Definately going for a dyno tuning session. I bet if I get my timing advanced I should see some good gains.

 

"[Also, we Dyno at Speednation , which uses a Mustang Chassis Dyno, a different animal than the DynoJet Dynos that are far more common...Mustang Dynos read very low compared to Dynojets, so the fact that my peak HP is near 150 doesn't mean I have the slowest Type R on the planet...other ITRs"

I have a friend that owns a Mustang Dyno. He prefers to say "more exact numbers" not "lower". The E.P.A., GM, Ford, Chrysler, Paxton........All use Mustang Dynos. The Dyno-Jet numbers are more common because the Dyno-Jet is much cheaper to purchase than a Mustang Dyno. Also you CAN-NOT compare any numbers from a Mustang to a Dyno-jet, and should not even compare numbers from different dynos. The dyno should be used for tuning purposes, the peak numbers are for bragging rights With that said my ITR baselined with 900 miles on a Mustang Dyno @144 hp. it is now making 180h.p and 131 ft pds again on the Mustang. 36h.p. @ peak increase and 44hp in the midrange. MY best calculated guess for Dyno-Jet #'s is 190 hp and 135 pdft. but that is not confirmed.

Mattj


[Modified by Dropspeed, 6:49 AM 7/27/2001]


[Modified by Dropspeed, 6:49 AM 7/27/2001]

 

Haha yeah Shitbox! Bite me Boba!

 

well said. and through all my searching and comparing of local cars that have been on dynojets and on this mustang dyno, it seems like 11 to 15% difference is probably a good ballpark difference between the two. take that for what it's worth... not much IMO.

D

 

I forgot to mention that I just removed my AEM and borrowed an Icebox to Run on the Dyno. I'll let you know how it goes. If it is close the Icebox will stay because it is so much Quieter than the AEM.

Mattj

 

Yeah, I'm not at all interested in a peak number, i want to see curve improvements, which is exactly what I got yesterday, so i'm a happy camper. Mike Ancas, who writes books as well as running Speednation, is doing a book on Focus performance, and he was telling us they spend hours looking for a couple horsepower. Be both gained large chunks across the board in about an hour, so that rocked. D's peak number was higher than mine on the same day (as well it should be with his JDM header and high-flow cat), but on a couple of pulls on the highway we were almost tied together, slight advantage to D...so Volks seem to give me a few more real-world horsepower, light rims are the bomb. On the radios:
Me "We were pretty tied together on the downhill slope"
D "Yeah, well lets see how we do with me on your volks and you on the stock rims!"
Me "Like that's EVER going to happen, Jacknob."

 

Very nice. I need to look into advancing my timing on the dyno
With OBD-II though, will it reset your timing back to stock over time? I believe that happens on the 5th gen preludes...?

 

It might change slightly over time, but I don't think the OBDII has anything to do with it. If you connect the Service Check Connector in your passenger footwell (what you'd trip to pull a Check Engine code, check our site for simple instructions on how to wire up a switch so you don't need a paperclip or Acura's overpriced SCS Service Connector (paperclip)), so the CEL will be on when you're adjusting the timing, it will accept the changes.
Hrm...as i look at the Helm now, it looks like we both adjusted to the white mark, which is TDC (RED mark is BTDC), apparently what you're supposed to use. Well, we both got power, so no complaints....but both our results were at +18 TDC, the white mark.

UPDATE: D has learned me good, as usual. The red mark is 16 degrees Before Top Dead Center, the two marks around it are "within spec". These are for use with a dumb timing light. We had an advance timing light, which uses a dial to show you where you are relative to the white mark, TDC. Werd to that. So we are 18 degrees BTDC.


[Modified by Aleph, 7:15 PM 7/27/2001]