Intake Camshaft??

[JMDPRO5]

What does this exactly do? Do they make it for the pro5? Is it worth it? If they make it, where could one get it? Any info on this item will be very appreciated.

 

[Pro5OnSpeed]

Camsafts.....

ok.... i will try to make this sound less technical but i want to know the answer myself....

camshafts can do a variety of things for your engine, or more precisely your cylynders and the compression and momentum of the piston from top dead center to bottom dead center.

what you want to look for as far as cams go, is that they can produce an inrease of gas flow or exhaust flow from the cylinder because the valve gets pushed out a little more then normal. also cam shafts can be timed right to keep open the valves a little longer to decrease the vaccum created by the intake stroke and or power stroke. this makes better momentum for your piston from dead center. ther are many variables to consider. if you get cams that increase flow by increasing the lift distance, makes sure that your piston head wont hit the valves, otherwise you will be screwed! before making your desicion find out what the cams will do specifally. there are a set of intake and exhaust cams available for the P5.
I believe you can get them at either www.pro5online.com or www.srmotorsports.com

and if anyone knows what the cams actually do i would like to know, whether they increase the distance of opening or closing, or they keep the valves open longer.

i hope this helps somewhat! if i am wrong please somebody correct me cause i am still learning!

 

[Pro5OnSpeed]

supplemental

i just checked the sight and they claim that the cams increase lift and duration. those are the Mazdaspeed cams. they say they add 10hp each but i dont think so. most people have done test and TOGETHER they add about 7hp. i want to buy them.

 

[Traveler]

I've got both cams in my car and I dynoed each one seperately. With the stock exhaust and intake, the cams don't make a ton of power, but they do make a difference.

The intake cam really didn't do much, but then it's not much larger than stock. Stock is .341 gross lift and 198 deg @.050 duration. The J-spec is .344 gross lift and 210 deg @.050 duration.

The exhaust cam is the one that I'd do if you can only afford one. The stocker is only .321 gross lift 198 dur, and the Mazdaspeed is .344 gross lift and 210 dur. I saw about 5 HP with the exhaust cam and about 2 with the intake. If you put a header on it, the power comes on a lot harder in the upper RPM though. The HP will climb to redline instead of falling off around 5700 or so.

I'm sure there is still quite a bit left in my engine that needs to be tuned to achieve maximum gains including some cam gears to move the valve events around a bit. I should have my E-manage by the weekend and I'll install it and see what happens.

 

[Pro5OnSpeed]

I should have my E-manage by the weekend and I'll install it and see what happens.

hey traveler, where did you get your e manage system and how much does it cost? please keep me posted. i am going NA route so please keep me informed!

 

[Traveler]

I found mine by keeping an eagle eye on E-bay and waiting. I was watching someone's auction for an E-manage with all the extras and it wasn't getting any bids. He lowered his price down to $450 1 day b4 the end of the auction and it still didn't sell. I simply emailed him 2 days after the auction was over and asked if he still had it. Then I offered him $400 for everything and he took it! He was supposed to ship on Tuesday and he was pretty sure I should have it by tomorrow. We'll see.

As far as other places to look, talk to Spoolin. He was talking about a group buy and being able to sell the unit for $319 and the harness and software extra. There is a guy on Ebay selling the main units for $281 'buy it now'. He's always got a couple of these up. If I get it by the weekend, I'll install it. I'm pretty sure I get Monday off this weekend so I think I'll bring the tools home and hope it arrives.

 

[Pro5OnSpeed]

thank you traveler!