danglerb

I have been surfing around, and found a couple places, anybody have any long term good luck from an aftermarket cam?

Spots I found are;

http://www.elgincams.com
http://www.webcamshafts.com/
http://www.jmengines.com/camshafts.htm - WOW does a 928 use the same cam as a 944?
http://www.germanperformance.net/porsche.htm looks the same

C.F.

In a word No. physically it would fit on the passenger side, but the valve opening sequence must be different , what about the drivers side bank ? a 944 cam wouldn't even bolt in .

SMTCapeCod

IIRC Sterling Gee's 928 used the 968 variocam setup-- after much modification. Web Cams and a place in Georgia (?) offered 928 cams, no real testimony on results. There are concerns (for some, at least) for cams that use OEM units and welded material to create new profiles, versus newly cut blanks. I thought that Huntly racing also offered 944S cams, must've involved reworking of the gear attaching point.

hacker-pschorr

944 cams will not work, the firing order is different even if they did drop in.

If you have a 16V - find some EuroS cams. Stock quality & much better than any US cam. Then you must ask the question, why just upgrade the cams when the EuroS heads flow better? Might as well find a EuroS intake, TB...........A hell, buy a EuroS or bolt on a blower.

mark kibort

yep, as hacker says, just get the euro cams and find a euro intake. 242rwhp is what i got with only this done. (vs 200rwhp with headers only AND on an LJet version) you wont get the gains without the headers or without the euro throttle body. (bascially, the US version is a huge (small) restrictor plate! 2.5" vs 3.3"!!)

scot has the Devek B1 cams, which are more lift and duration, and got 250rwhp with 20degrees max timing advance which we later fixed. Devek B1 vs stock euro S cams is probably worth about 10hp max unless other changes are made to take more advantage of the design. we will actually see when scot gets his 5 liter euro engine finished, as we can compare the euro cam on a 5 liter 2 valve engine vs the euro s cam on the same set up. i got 293rwhp and it will be interesting to see what he gets with the only change being the Devek b1 cam.

Mk

danglerb

I've been talking to Greg and Stan about a hybrid motor, 5.0L shortblock with Euro top end. If billet material was available for the 944 might it also work in a SOHC 928?

I am a little puzzled by the lift of the cams I looked at, around 400, when I am used to a Ford cam being closer 600 even on a street motor.

BTW its not like I have a plan here, I am just looking around to see if anybody has a plan.

atb

danglerb

This is on the 4.6? That's a lot of lift for a 4v motor. Maybe they have smaller valves?

danglerb

This is just one I picked out of the comp cams mustang catalog, 1.90/1.60 is a common int/ex valve size for a 302/ 5.0L old style mustang.

HYDRAULIC ROLLER-Street/Strip 3000 to 6500 35-450-8 286HR 286 286 230 230 .598 .598 110°

That should flow around 245 cfm in a 165 cc intake runner AFR street legal head. I don't know whats in the 928.

SwayBar

Your mistake is that you're comparing 2v cams to 4v cams; they are not comparable at all when it comes to lift as a 4v needs much less of it to get it's flow.

If you want to compare 4v cams, look at other manufacturer's 4v motors and their cam specs.

danglerb

I was looking at the 16v like my 83 has. Didn't see a spec handy for US 16v

This is a Euro I think
.471/.432 250/236 232/220 European profile

mark kibort

i think this has the specs

C.F.

This is more of a comparison ,straight from the Ford motorsport catalog, cams for the Ford 4.6 & 5.4 DOHC V8

First cam's are off the Ford GT which is factory supercharged to upgrade a GT500 Mustang, is that SC'ed as well ?

Second cam's is more like it , 12mm lift (0.472 ")

IIRC lift on a 928 S4 is 9mm & GT 10mm

2007 SVT MUSTANG COBRA
HIGH LIFT CAM SET
M-6550-GT*
• Original equipment camshafts for the Ford GT supercar
• Direct retrofit to the 2007 Mustang GT500
• Increases lift from the stock 10mm to 11.8mm
on both intake and exhaust
• Compatible with production springs,
followers and lash adjusters
• May require calibration to achieve
optimized performance

HIGH-LIFT CAMSHAFT KIT
M-6550-T46*
In order to maximize the performance potential
of the high-flow cylinder heads, we recommend
these higher lift camshafts. Contained in the kit
are all components necessary to utilize these
improved profiles (including valves and springs).
These camshafts provide excellent power right to
the fuel cutoff at 7000 RPM, and actually bolster
low-end torque as well. Drivability on the street
is superior to production cams. Because
it is necessary to install new valves with these
cams, it is recommended that this kit be
purchased and installed at the same time as
the cylinder heads. Cam specs: lift 12mm, intake
duration 258°, exhaust duration 254°, 109°
center line.

hans14914

Phil used to have some over at 928developments

hacker-pschorr

Forgot about this:

https://rennlist.com/forums/928-forum/314573-16v-timing-spec-sheet-and-question.html

FlyingDog

You can run 944 cams if you get a flat crank

Elgin has done some work on 928 cams, so has Piper in UK (I think Greg Gray used them). Devek also sells 928 cams.