I just picked up a set for cheap (BNIB for $250)

http://www.pipercams.co.uk/pipercams...id=MITS10BP270

I know they are not aggressive, but I am not looking for big power and didn't want the hassle of changing the springs (or waiting for GSCs to be in stock).

Anyone have experience with these? Advice? I will be going flex fuel/V3 shortly and am currently all stock internals and turbo (won't be changing this in the foreseeable future). Full bolts ons, making 360/370 now on 93. Shooting for the 425-430whp range.

 

You may want to look up the specs of the stock cams.. I think you purchased less cam and you aren't going to make the power you are shooting for, the duration and lift just isn't there. Piper is a good UK co and makes good stuff.

 

You're not going to reliably make over 400 on the stock turbo.


That being said, those cams do not appear be worth installing. The exhaust cam has the same lift as the stock cam, and LESS duration. That's going to literally hurt power.


Sell those things, and pick up some GSC S1's.

 

I just got a set of GSC who said they are not in stock?

 

I almost think its misprinted... Underneath they have other ones with even less duration... I had the GSC s1 on my old VIII if you cant get them let me know I know someone who can get em fast

 

Evo X S1's in stock...


https://www.extremepsi.com/store/pro...at=1744&page=1

 

I used this as a comparison. Not sure how they have less of anything that is stock, and are not far off from S1s. Almost identical on the intake cam to the S1, not as much overlap on the exhaust so less lope. Not sure which ones you are looking at:



and then the Piper cams I bought

 

These are the stock cam specs I found... And whoops....they're 8 cam specs. Thanks google.....

Anyways, the S1's don't lope. I've installed them in 3 different X's, they idle very smoothly.

I still wouldn't advise going with and exhaust cam that has that much less duration that the intake. It's going to hurt the engines over rev (how it holds power to redline after it makes peak power).

 

Then how does stock cams not cause an issue? Legit question. Stock is a 8.8% difference in duration, and the Pipers are 9.5%. That is not insignificant, but I have a had time understanding your statement.

Also, I thought that was the point of dual MIVEC, to eliminate those types of issues.

 

I had s1s in my 8 and my tuner made it so they did lope, it was inconsistent but not impossible. Not sure about the 4b11 though

 

Ok, I don't really care that much about the lope lol. Just want more midrange/torque.

 

It not that it's an issue, its just that if you're going to take the time and spend the money to install cams, why go with something that has the same duration split as stock. Which part of my statement doesn't make sense, I'll try to clarify.


MIVEC changes timing, not duration. It helps, but it can't make up for everything.

 

Yeah, this. Sounds like your settling just for that small price tags on cams ive never heard of.. Plus installation on the 4b11 from what ive heard is a *****. Might as well do it right the first time

 

They are really popular in the UK/Europe. I'll post results after I get them tuned. Picking up my ID1000s today. And BTW, I will install these myself.

 

Certainly in for the results. I think we're all anticipating the outcome. It may open another choice for the US guys.