Piper Camshafts

[celek]

Originally Posted by swarb

The valves are also .7mm longer too, I think it was for the 2015. I forgot where I found that at, but it was a new part number.

http://www.ft86club.com/forums/showp...4&postcount=72

[Chad_W]

Originally Posted by Tim Radley

The peak figure i ended up with was not what a few people were expecting. But as always the problem with a dyno chart like that is it is a full throttle run from 2000-8000rpm which is not representative of how it is driven in real life. The transient response of the engine is greatly improved now compared to stock. The OP was emailing me asking about the engines response and idle with these cams. It is a shame its not a bone stock engine though for me to give him a 100% solid answer but the work i've done shouldn't affect idle quality compared to stock.

I completely understand what you are saying here. With the stock power curve, as you accelerate from about 3500rpm, you start coming out of the torque dip. This makes it feel like the engine is dramatically coming to life as you rev it out.

I just flashed to stage 2 with OFT and an UEL header and by the numbers it's clear that I'm getting to 100mph much faster. However the power is much more consistent everywhere in the rev range, so it feels much less dramatic as I row through the gears.

[wootwoot]

Tim: Do you think a stock car would start and drive with stock Ecu and the mild cams installed? Wondering if the car would make it to a tuner after install.

What advantage do longer valves give you?

[swarb]

Originally Posted by wootwoot

Tom- Do you think a stock car would start and drive with stock Ecu and the mild cams installed? Wondering if the car would make it to a tuner after install.

What advantage do longer valves give you?

Lets keep this discussion about cams and the stuff involved with building this motor. Like you said in another thread. "Stay focused people."
And his name is Tim.

Yes it will make it there. Lets be patient and not get ahead of ourselves. Longer valves? Interference/clearance is the short answer.

[Lonewolf]

Originally Posted by Tim Radley

One thing i forgot to add. The camshafts out of my stock 2014 Toyota GT86 measured up differently to the ones Piper had from a 2012 Subaru BRZ. Lift, duration and pin location were all different. It appears there are variations in stock cams between models.

Any tech articles, photos or numbers to detail this? I would love to read about these differences.

[celek]

Originally Posted by Lonewolf

Any tech articles, photos or numbers to detail this? I would love to read about these differences.

It may reflect those longer valve stems and rocker changes too.

[uspspro]

@Tim Radley

Hey Tim,

This is some really amazing stuff, thanks for sharing your findings!

Question... So, just to clarify that nice dyno chart has the following mods, please correct me if I am wrong...

- Piper Cams
- Upgraded single valve springs
- Tuned ECU (Motec)
- Stock header
- Stock internals, other than cams/srpings, but blueprinted.

Does it have any of the port filling work done to it, or are the ports still stock?

Thanks!!

[abraxis]

+1 for someone getting these heads into the game.

+2 for for verifying the ACE header.

[Traktor]

That dyno graph still has peak power at around 7000, similar to stock. It will be interesting to see if the more aggressive cam enables power above this.
Great to see cams finally coming to market.


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[w0wbagger]

The piper website says that with their stage 2 cams one would also need their valve springs.
Well since I am already running aftermarket double valve springs I was wondering if I could install the stage 2 cams (ultimate road) without changing my valve springs again. Anybody has some info/ opinion about that?
I am also running +1mm oversize valves.

[sw20kosh]

Originally Posted by w0wbagger

The piper website says that with their stage 2 cams one would also need their valve springs.
Well since I am already running aftermarket double valve springs I was wondering if I could install the stage 2 cams (ultimate road) without changing my valve springs again. Anybody has some info/ opinion about that?
I am also running +1mm oversize valves.

Wow! Any data or dyno results from your current setup?

[w0wbagger]

I am running the Vortech Kit and not n/a, if that was what you'd hoped for.
For my results check the vortech owner thread.

Since the oversize valves have been installed together with the engine builing i cannot say how much gains just by the valves could have been reached.

[w0wbagger]

I've just received an E-Mail from piper, that their stage 2 and 3 cams can also be used with other aftermarked stronger valve springs! Just if any1 else was curious.

[wizzo]

Can they be used with stock pistons?