Finally the wait is over. The dyno of the PR headers has been posted at PRsite.


Look impressive to me if the cost is same or less than Comptech

Here is the Dyno:




Fully story here:

http://www.prototyperacing.com/dyno.htm

 

soooooooooo wheres the acura CL-S dyno????

 

Thanks for the info on the PR headers!
It will be interesting to see how much they want for them!

 

When I was talking with Joe at Prototype about the test fit on the 6-Speed CL-S, he said the target price was going to be 1000-dollars.

Seeing that they won’t fit the 6-Speed without MAJOR change in design, I have no second thoughts about my 999-dollar Comptech purchase.

Shawn S

 

 

Nice mid range output....I commend them on that...however, it doesn't show anything below 4300 rpms...blah blah blah...its bs..show the whole power curve...at least from 2500 rpms....and then let everyone make their opinions, not what he thinks should be shown.

 

i find it very strange that a long boy 6:1 headers would have better low and mid range and die up top...seems to defy logic

 

Looks to me their headers gain more low end, but lose some of it at the top end. Comptech's are more a good combination of both. Of course a dyno should be done on a stock 6 speed, & a stock 5AT CL-S. For that matter the test Honda should have been stock. I could car less what it dyno's with other mods.

 

why use a modded car to dyno headers? i'd rather see them stick it on a fully stock car and see the gains from that. :sqnteek:

 

well, they seem to give the same results at the track as the comptechs,

http://www.acura-cl.com/forums/showt...threadid=76097

 

What are the advantages to having larger gains in the mid-range/high-end part of the curve... aside from the obvious that you will spend more time in the mid-range..

 

more lowend/midrange, the better the 60ft times.

 

True, but wouldn't the times even out over the rest of the 1/4 ??

 

It depends on the gains. I would actually have liked to see the dyno from 2k-7k, instead of 4k and up. From the looks of the dyno it looks like we would have an advantage over comptech with the proto headers. When we change gears we are usually around 4800-5k rpm. The extra power there would help us rev faster.

spiro

 

"This data starts at 4300 RPM because Harve runs the car on the Dyno the same way it's driven on the street."

Haha, yeah. Actually I only drive around 6000 rpm.

Let's see a CLS 6sp dyno. Oh, wait. They don't have headers for the 6sp.

 

Looks kinda heavy mmmm-kay.

 

Ok so it does gain a hefty mid range but what about before 4300 and when it says @6400rpm CT is 182.0 and PT is 178.6 which is -3.4hp loss over the CT headers...isn't that still over what it is stock?? They need to do 3 Dynos...first a stock cl-s and then one with the CT and then 1 with the PT headers. That way we can tell what the true addition of power is. Like for instance if you see the same gains on the cl-s you would only loose 3.4hp at the top end with the PT headers over CT, but you still would be getting 28.6 over stock + much more mid range!?!?!

 

Do the math - there's much more under the curve than the Comptechs. The little bit the Comptechs are better in the high-end doesn't equate to the amount gained in the lower-to-mid range.




Me too. Wtf.

 

First, this an Accord V6 Dyno. Not a CL-S. There would be no CLS testing at this tme.

Breaking News:

PR is selling the tooling of the PR Headers. The new owner is a mass market guy who would agressively compete with Comptech. The PR headers would priced below CT. CT could lower their price to compete. Once mass produced, there would be no wait for PR Headers delivery.

We need to wait a bit till the deal is in stone.

Sheers.

 

Hmm well I am putting my CT headers on today and Ill just wait and see how it pans out

 

Are these headers definately going to fit a 2003 Accord? If not, I don't know why anyone would invest in buying the rights to them since I'll bet whatever Acura has in mind for the new TL and CL will not be the current 3.2 set-up. And, I wonder how much of a market is left for current CL and TL owners who want headers and don't already have them.

 

he's been trying to sell the tooling for quite some time now ...

 

I read somewhere that the new 2003 Accors has a modified exhaust manifold (somehow integrated ). On the new Accord the stock could be good enough or hard to replace with anftermark.

Still Accord sell some 400k units a year. Say 10% are V6 so you have some 50K unit a year. Say 5% are interested in headers so you have some couple thousand interested buyers.

 

[QUOTE]Originally posted by JRock


Do the math - there's much more under the curve than the Comptechs. The little bit the Comptechs are better in the high-end doesn't equate to the amount gained in the lower-to-mid range.





Yes, there is a lot more usable power in the MID-RANGE.....I'm willing to bet he lost a shit load of torque and hp at the 2500-4K range....thats why hes not showing anything below that....i would do the same thing if my headers made good power at midrange and top end, but lost at the bottom.

CT shows you that they do lose a 1lb. tq/2-3hp at low end...but after 2200rpms they start ramping up and power delivery is linear. Those headers make it seem like an 80s turbo...spools up...boom!! Full boost...dies off...everyone passes it up.

 

I’m glad I have my Comptech Headers installed already.
Now I don’t have to get excited over all this speculation every few months when this topic comes up.
The Prototype Headers have been “almost ready” for almost 2 friggin years now.

After installing the headers in my friends garage the other week, I can safely say they are going to have a HELL of a time redesigning the Prototype style ones to fit that rear bank on the 6-Speed.
I just don’t see that happening even if the CL survives the AXE next year.

Shawn S

 

Well Gee Wally, that's swell!

 

""The Prototype Headers have been “almost ready” for almost 2 friggin years now. "" By Shawn S.


ROLFOL... LOL.... True.... yeah good luck with fabricating the rear header for the 6-speed, this will be interesting, but it will be a long wait....
Smity

 

On the Prototype Racing website, they explain why the dyno started at 4300 rpm. It's because when the car was dyno'd the car shifted from 1st to 2nd to 3rd. The data started at 4300 rpm because thats where 3rd gear began at right after the shift. If any of you guys know how the dyno works . . . you have to set the datalogger to the gear that you want to dyno. Since 3rd gear on the accord is the closest gear to a 1:1 ratio (direct drive) it'll give you the most accurate power figures. The data in first and 2nd gear are invalid because they'll falsely give you higher torque figures since the gear ratio is a lot lower ratio than 3rd gear. Also the shifts show up as blips on the dyno chart. If you ever had a car dyno'd you'll know what i mean

BTW, the car dyno'd was chosen because that was the only car that volunteered that had CT headers so that direct comparison could be made between the 2 headers. Anyways, the typical order of mods start from simple bolt ons and go from there, usually increasing to more serious mods that usually cost more. For example, people usually do the simple intake aftermarket upgrade first, then exhaust, then headers. People in the market for headers, usually have the simple & cheaper bolt ons already. It just makes sense.

Prototype Racing is not trying hide anything, they were even ready to scrap the entire project if it didn't produce worthwhile gains. The equal length design on the headers did what it was meant to, to produce better low to mid range torque. This makes the car more streetable and produce extra power where you spend most of your time driving. I mean how often do you drive around town at 6000 rpm.

 

Its kinda too late to be coming out with new headers for the accord and CL anyway, dosen't it???
The CT headers are the only ones available now and there is really nothing wrong with them! Why come out with new headers and the end of the cars production? It would be nice if they drove the price of the CT down, but I already bought mine so...
I dont care!!!

 

Whatever....the fact is...the dyno is at 4300....doesn't matter...if he wanted to start a dyno at about 2-3K he could have...whatever he said about the 'real life' is bs......how can comptech and numerous other dynos give you dynos starting from 2-2.5K?
And he wants to talk about 'real world'....well, that 15.3 at the track is saying that he lost a lot of low end....gained it in the middle and top. So, that isn't real drivability....as most ppl cruise around at 2-3.5K....

 

I totally agree.. I mean, it's not so much that the car is modded.... since you're comparing apples to apples you can still get an idea of the gains. I've never seen a company start a dyno at 4300 rpms... makes no sense. I'd like to see an overlay of the Prototype headers with the Comptech headers from around 2k... only then will they get my money, otherwise, Comptech will. If they're boasting about low end gains... show them... 4300rpm is mid-range to me. They proved that, now show what they got down low.....