NEW cam for I6 - Page 3 - Ford Forums

Full Monty · 03-13-2002, 19:20

I got mine from Di'fillipo engineering in Melb, they fabricate custom exhausts etc..

any reputable exhaust shop should be able to make one up, cost is around $300, mine is HPC coated inside and out, it help sheild heat from the intake temperature...take your car in, get them to take all of the required measurements, bracket mounting points, angles required, and they will probably be able to whip one up in a day..

my initial thoughts were that it aided the cars breathing noticably, it spools up crisper, and the responsiveness has improved..

I havent dynoed the car since I had the intake fitted, but street machine did an article for the ford 6 around a year ago, they found the gains to be around 7rwkw on a stock 6..perhaps more if you have the exhaust/heads worked?...

I have to get it dynoed before teh unichip is installed(eventually) to get a benchmark...so I wont know for sure until then, but the seat of the pants feeling tells me it did improve the responsiveness and power

Full Monty · 03-13-2002, 19:22

ohh thanks for the welcome also...I have been around the forums for a while now..I was previously posting as "roTor"...but since getting the fairmont I thought my new nickname was more appropriate =)

EDFUTURA · 03-13-2002, 19:35

Xyphoid, it's all really confusing and ultimately I think the best thing to do would be to call Crows and ask outright what's what. As far as I know, the cam I got (22825) is that one they talk about - but I didn't think cams were compatible between AU and the earlier models - so that title they've used is confusing. Also, the switching intake setup on the EF/EL etc. makes a huge difference to the way the engine behaves - so it seems odd to develop a cam using an EF "mule" which then is touted as suitable for EA-ED as well. I personally think that the lack of high rpm short path switching is the reason that cam fell flat in my ED - it definitely felt healthier in the EFXR6 head with EF manifold, but I felt the EFXR6 cam still edged it. The other odd thing is people talking about "stage 2 for EFXR6" and Crows site talking as if that original grind was stage 2 with a stage 3 comming soon - ????? Like I say, a call to them might be the only answer - sorry I can't help more with that.

XR_Strider_GuY · 03-14-2002, 04:26

Excellent discussion guys, as a few of you already know my car is under operation for a new gasket and head clean up.
I was thinking of putting in a cam but as my engine is already pulling good figures i'd thought of delaying the cam replacement until later.

As well as that i can't afford XR6 valve springs + guides just yet to cope with an XR cam.

After reading what you guys said about needing extra shimming to quieten the valve train, i feel more secure to just run my standard cam, which is in very very good condition. I'm not a fan of valve cluttering which mine was getting just before the operation.

I think i'll go for an XR6 cam, with XR valve springs for the future for cam mods, however due to the cylinder head difference between XR and stocker i'm thinking the stock computer won't cater for the cam too well.

Another point why i'm enclined to stay with the stock cam is, when i'm driving i occasionally like to rev it out, and i know it will annoy me if the valve starts to rattle.

EDFUTURA · 03-14-2002, 05:46

EF_Falcon_GuY, the std EF cam is no slug - it's actually got the same exhaust timing as the EDXR6 cam and has LONGER inlet duration than the EDXR6 cam!! (closes the same but open 2 degrees earlier). That coupled with the BroadBand Manifold (BBM) explains why your machine feels so tough - it's because it bloody well is!!

I spewed when I found out what they'd done with the EF - ie. I didn't find out the specs on the EF until after I got my ED - so I've since worked at "EF-izing" my ED engine :s2:

The shimming is only needed when a regrind cam is fitted - because in order to get more lift the base circle of the lobes is shaved down (your cam lift is the difference in height from the axis of the cam between the lowest point and highest point on the lobes) - which means that the "gap" the lifters have to take up when the valves are closed becomes larger and can exceed the ability of the lifters to cope with.

Factory cams and "billet" cams don't have this problem - unless the lift is absolutely massive!!

rorycollett · 04-22-2009, 22:15

Quote:

Originally Posted by EDFUTURA

I've been told that EL went to different rocker ratio - ie. EA-EF is 2.0:1 whereas EL is something like 1.86:1 (?) - in theory I guess that means the EL cam has more lobe lift?? To be honest, that doesn't sound right - somehow I think that person must have been talking about AU - that would make more sense with the low drag valve train of the AU.

Xyphiod, where did you get that dynotec cam from?

ea-el use the 1.8 and the 96onwards el and au use the 2.1 ratio.

rorycollett · 04-22-2009, 22:19

Quote:

Originally Posted by AU1SIXA

Hi again do u guys recommend i get a xr6 cam for my ebii. If so what year or what would be best suited and if so how much are the xr6 cams and what would i need to change to slap one in.

Steve

an ef cam, standard not xr6 i mean has close specs to ed xr6 and is much smoother too and a $30 upgrade from any wreckers

rorycollett · 04-22-2009, 22:20

Quote:

Originally Posted by Xyphoid

I dont know what the differences there are between EB/ED/EF/EL, so unfortunately I cannot help you there.

Maybe the Crow cam doesnt have such a wild grind for the reason that it seems to be more multi-purpose than anything else.

(I.E. they advertise the thing as being suitable for EA3.9, and EB4.0 - AU4.0) Just thinking about that, that is a pretty broad spectrum of motors that it is supposed to be suitable for.
Add that it supposedly doesnt require any head modifications, or ECU tuning. (Although they do suggest that an exhuast and headers be fitted).

The EF XR6 head has stronger valve springs, supposedly to help get the most out of the XR6's cam grind, so maybe if you are fitting an EF XR6 cam, you may need to upgrade the valve springs, whereas the Crow doesnt seem to require this.

It was recommended that with the dynotec, that the Valve springs are to be upgraded, and lifters are to be replaced, regardless of what condition/head you had. As I said earlier though, It seems fine with the XR6 springs, but I did need to replace the lifters, and add a further shim to each lifter. (2 Shims per lifter).

So I guess after all this rambling, I am not sure what cam may be better for your particular engine, as there are a lot of other factors that can contribute to performance, I.E. are you prepared to change valve springs, fit shims, or are you happy with the figures claimed for the Crow Cam Stage 2 ?

Cheers
Matt

sorry to say but xr6 does not have any measurable diff at all. proven by jmm