We decided to try these out. Put the car back to where we can get some basic back to back test for what most people have. Here are the details

02 S2000 60,000 miles
eBay CAI
Invida 70mm Test Pipe
HKS 75mm Exhaust

The results were even better than we had hoped. 13whp peak gain with 20+ at redline by just bolting in these cams. It's only a 2.5hr job at most as well. I'm sure the results would be better if you tuned them but I wanted to do a straight back to back with stock ECU (no piggy back etc).

Here is the link to purchase them

Buy them here


I put SAE, STD, and Uncorrected readings blow so you guys can see the results. We did a S2000 dyno day and most stock 2.0 S2000s will make about 195whp on this dyno. The AP2 cars about 202-205whp.

EDIT:::::::3/17/11

My name is Jay Meagher, I am the tuner here at RSP and it looks like I need to clear up an error. I apologize that I haven’t cleared this up sooner, I’ve been out of town and this is the first I’ve seen of this thread.
After we did the back to back dyno test of the stock cams vs BC stg2 cams, later that night I stayed late to gather more AEM EMS4 data for our website (maybe you’ve seen the previous footage we posted). While I was doing EMS4 dyno footage, I forgot to make a separate folder in the DynoJet software, so my EMS4 pulls were saved to the same folder that all the back to back stock computer pulls were in.

When JC pulled the first and last dyno pulls from the folder to show the baseline and final numbers of the cams with the stock ECU, he was unknowingly grabbing the last ems4 pull that i did after hours.

Ive updated the graph to show the 3 different cases. It shows
Case1: Stock Cams + Stock ECU
Case2: BC Stg 2 Cams + Stock ECU
Case3: BC Stg 2 Cams + AEM EMS4 (Same gains as Series2 EMS)

I apologize for this confusion, mistakes happen, and I hope this post clears up concerns about AFR and safety. Our goal is to provide you with valuable information, and give you whatever results we can so that you may make educated decisions when modifying your engine. These results show without a doubt that the Brian Crower Stage 2 Cams safely add power, and that tuning with an EMS provides even further gains.

If you go through the data you can clearly see where the camshafts run away from the factory setup, and you can also see that the factory tune up provides a good compensation in the tune up for extra airflow. You can see from 6000-9000 where the BC Stage 2’s are ahead of the factory camshafts the whole way power wise, the AFR curves essentially mirror each other. You can also see where the AFR of the BC Stage 2 is actually richer than the factory camshafts between 4500 and 6000, while still making more power.

The above speaks to the ability to run these cams without tuning: solid gains, clearly not out running the factory calibration, as it easily compensating for the change in airflow characteristics. As far as the tuning aspect, that’s when things really get fun with this car, you can see the top end power really carry compared to the factory ECU’s “oh no! / bilge pump” calibration where it dumps fuel and gets scared. The BC cams were able to carry 14.63 more SAE horsepower to 8800 without any tuning, and then another 9.5whp with a little work on the EMS-4 (or Series 2). Furthermore, you can see huge gains in the midrange. At 5900, the factory camshafts made 133.37whp with a 12.90:1 AFR, the BC’s just dropped in picked up 11.1whp on their own – 144.47 at a *richer* AFR of 12.57:1, and then with some tuning we picked up ANOTHER 13whp over the BC’s to 157.34whp with a 12.87:1 AFR. That’s a gain of 23.97whp @ 5900rpm with a .03:1 AFR delta. Or put another way, that’s a gain of almost 18% or 1/5th the total power right in the middle of the gear. These cams, especially coupled with tuning, are really impressive.

Again, sorry about the original confusion, it was my mistake that I didn’t tell the guys I was working on the EMS4 stuff, but now that it’s cleared up hopefully you have a better grasp about what not only the cams do and don’t do, but what a Standalone can bring to your program, even when it’s not “needed.”





The Brian Crower Stage 2 All Motor cams do not require springs/retainers although we recommend them, especially for the AP1 cars. The AP2 cars are ok. The price is $601.25 and again, you can purchase them here:

Buy them here

 

those numbers look great for plug and play. dyno's were same day too?

 

lets c a back to back dyno on a stock ap1

 

wow....for the first time, i am impressed by crower...not too shabby

 

dyno pulls were done at lunch time on 2 back to back days. same time of day, similar temperature, etc

not sure what you mean? you mean like stock exhaust stock intake? normally cams arent the first modification someone does to one of these cars. The test car really only had intake and exhaust, basic bolt ons that are commonly done before cams.

 

I think he knows that, I imagine he'd like to see the HP increase on a stock AP1(aka no bolt ons) just my guess though.

 

^x2 yea i would like to c how they perform with out supporting mods.im sure im not the only one

 

What is the point of doing $600 cams if you aren't going to do the supporting mods? Seems like a moot point.

 

This looks very promising. Might need to purchase some ery soon!

Are there any long-term issues that we could come across without running some sort of aftermarket tune?

 

to take out variance

 

really? no ****. it would still be nice to c what the cams can do alone.

 

What's with the power loss after 8.4k on the stock cams? Is that common on the F20? I can't find any stock AP1 dynos. My AP2 made power all the way to the fuel cut.

 

the f20 peaks at 8.5

 

Good info and good test.

Its sad to see that even though you're throwing good tech info out there......you still cant please everyone.

 

he just wanted to know what to expect on a bone stock motor with these....i understand people dont just do cams without anything else, but to get a good idea about what to expect with these, all the variations need to be taken out...i see what he's saying and i dont think he was trying to be a dick

 

I'm pleased and would be happy to buy them.

 

My name is Jay Meagher, I am the tuner here at RSP and it looks like I need to clear up an error. I apologize that I haven’t cleared this up sooner, I’ve been out of town and this is the first I’ve seen of this thread.
After we did the back to back dyno test of the stock cams vs BC stg2 cams, later that night I stayed late to gather more AEM EMS4 data for our website (maybe you’ve seen the previous footage we posted). While I was doing EMS4 dyno footage, I forgot to make a separate folder in the DynoJet software, so my EMS4 pulls were saved to the same folder that all the back to back stock computer pulls were in.

When JC pulled the first and last dyno pulls from the folder to show the baseline and final numbers of the cams with the stock ECU, he was unknowingly grabbing the last ems4 pull that i did after hours.

Ive updated the graph to show the 3 different cases. It shows
Case1: Stock Cams + Stock ECU
Case2: BC Stg 2 Cams + Stock ECU
Case3: BC Stg 2 Cams + AEM EMS4 (Same gains as Series2 EMS)

I apologize for this confusion, mistakes happen, and I hope this post clears up concerns about AFR and safety. Our goal is to provide you with valuable information, and give you whatever results we can so that you may make educated decisions when modifying your engine. These results show without a doubt that the Brian Crower Stage 2 Cams safely add power, and that tuning with an EMS provides even further gains.

If you go through the data you can clearly see where the camshafts run away from the factory setup, and you can also see that the factory tune up provides a good compensation in the tune up for extra airflow. You can see from 6000-9000 where the BC Stage 2’s are ahead of the factory camshafts the whole way power wise, the AFR curves essentially mirror each other. You can also see where the AFR of the BC Stage 2 is actually richer than the factory camshafts between 4500 and 6000, while still making more power.

The above speaks to the ability to run these cams without tuning: solid gains, clearly not out running the factory calibration, as it easily compensating for the change in airflow characteristics. As far as the tuning aspect, that’s when things really get fun with this car, you can see the top end power really carry compared to the factory ECU’s “oh no! / bilge pump” calibration where it dumps fuel and gets scared. The BC cams were able to carry 14.63 more SAE horsepower to 8800 without any tuning, and then another 9.5whp with a little work on the EMS-4 (or Series 2). Furthermore, you can see huge gains in the midrange. At 5900, the factory camshafts made 133.37whp with a 12.90:1 AFR, the BC’s just dropped in picked up 11.1whp on their own – 144.47 at a *richer* AFR of 12.57:1, and then with some tuning we picked up ANOTHER 13whp over the BC’s to 157.34whp with a 12.87:1 AFR. That’s a gain of 23.97whp @ 5900rpm with a .03:1 AFR delta. Or put another way, that’s a gain of almost 18% or 1/5th the total power right in the middle of the gear. These cams, especially coupled with tuning, are really impressive.

Again, sorry about the original confusion, it was my mistake that I didn’t tell the guys I was working on the EMS4 stuff, but now that it’s cleared up hopefully you have a better grasp about what not only the cams do and don’t do, but what a Standalone can bring to your program, even when it’s not “needed.”

 

thanks for the informative post. clears up some major questions

 

this power loss, is due to the OEM engine management calibration, all Ap1 are like this, and this is the reason why ap1 should be rev up to 9000 rpm (power loss, lost of acceleration)

 

I'm in for numbers on stock parts.

 

Thanks for answering that Garrett.

We don't have any plans to dyno this stock vs cams. It just doesn't make sense to do mods in that order.

 

Thanks for taking out the variables...

 

im kinda digging that fact that just dropping these in raises the AF ratio....i always thought honda should have leaned the AP1's out a little more...im sure theres power to be made stock since these things tend to be pig rich from the factory

 

Damn nice gain