Carl Fausett

We now have a small selection of master cam profiles with which to make a few 16v and 32v camshaft upgrades.

We can manufacture the 300 HP "Euro" cams for the 16v engines if you cannot find them, and 1 set of cams even above that.

For the 32v engines, we have located master cam profiles that allow us to make the GT cam sets if you cannot find them (they are a little more agressive than the S4 cams) and two more camshaft profiles above that.

I just received a set of them in here (PN 928MS 32vR3) and the pictures are below. I am VERY pleased with the quality and workmanship. These are going into my own engine.

My manufacturer has been making camshafts for 928's for a number of years - so although they are new to our product line, they are not new to them. I worked closely with them to locate master cams for each grind we desired, and only selected those cam grinds that have already had a good history in the field in actual use.

The grinds are:

16v Porsche 928 Cams:

Name Intake lift/duration Exhaust lift/duration Comments
OEM (baseline) .432” / 220 deg .394” / 210 deg 78/79 Euro
928MS 16vS1 .471” / 232 deg .432” / 220 deg (a)
928MS 16vR2 .506” / 246 deg .480” / 234 deg (b)

(a) Similar to 310 HP Euro “S” cam profile, but with a little longer duration. Top camshaft for street use.
(b) Wild camshaft for racing, comes on at 4,000 rpm and up .


32v Porsche 928 Cams:

Name Intake lift/duration Exhaust lift/duration Comments
OEM (baseline) .354” / 200 deg .313” / 190 deg 88/89 S4
928MS 32vS1 .393” / 214 deg .353” / 200 deg 90/91 GT
928MS 32vS2 .428” / 214 deg .389” / 206 deg (c)
928MS 32vR3 .442” / 222 deg .398” / 216 deg (d)

(c) Sport/light race camshaft, excellent qualities all-around.
(d) Wild camshaft for racing, pulls strong at top end.


Normally, aftermarket cams have a 6-month warranty. I was able to raise that to a 12-month warranty upon seeing their process and their quality.

More information is available here for you:
http://www.928motorsports.com/parts/camshafts.php

RyanPerrella

cool Carl

When you say "master cam profile" what does that mean? The cams pictured look like OE Porsche cams, are you making reproductions based on these cams or are you selling OE cams, sorry i am not clear?

EDIT

Aww i see, you are welding then regrinding.

Peter F

Awesome Carl

Thanks for your continued contribution of cool and useful parts for our loved 928

/Peter

RicerSchnitzzle

Very cool, which you had these a few weeks ago before I ordered mine from JME. You're less expensive by a couple hundred dollars.

Will you have the race springs or at least 944turbo springs for the 16vR2? They'd let a Euro go north of 7K. Not sure the stock springs would handle the larger cam.

PorKen

Does the LSA remain the same as the core cams?

Can you use S3 cams as cores? IE. is there a S3 option?

Carl Fausett

If I start with S3 cams as the core, we can add these profiles to them - so yes, I can turn out an S3 cam set for you if you desire.

Carl Fausett

In order to grind a camshaft love to a specific shape or "profile", there must already exist a master of that profile for the machine to follow. The it can replicate the lobe profile from the master to the camshaft you are making.

I have seen camshafts advertised before for the 928 that really do not exist - the case of 928 Developments comes to mind. I purchased their warehouse inventory and their data/research papers, and although there was some good bench work and development data in the mix that has helped us develop these camshafts, there were no master cams in existance at all for the 10 or so camshaft grinds he had for sale.

A new master cam costs between $1000 and $1200 a piece to make, and you need one for each intake and exhaust camshaft.

We actually HAVE masters for these cams I am advertising, so there will be no delay in manufacturing them, and I can keep the costs down because the investment in the masters has already been made.

My work, in the past months since buying out 928 Developments, has been to digest the good from the schaff, actually find masters for each of the cams I wanted to offer, and sort through a number of cams that have been made for the 928 in the past to focus on those that have actually performed well in the field.

At the moment - these are the only cam grinds I will endorse as already having been made and known to perform well.

Carl Fausett

I have titanium springs and after-market high performance springs. I have not listed them yet, still sorting them out.

hacker-pschorr

Most excellent Carl!!!!

Time to start rebuilding the EuroS heads I have for the 79.


Now I just need a go-fast cam for the 16V 944S

JHowell37

So is this a new cam, or are you reworking existing ones?

123quattro

He's welding and re-grinding the factory cams.

That is very cool. I might have to hit you up for a set of 16v race cams/springs this spring if I still have a job at GM.

Benton

Carl,
Awesome! Post up a video once you get the cams installed as well as some numbers. Would that same cam work well in a tuned 86 NA motor?

Also (forgive my ignorance on engine building), how does one measure the valve to piston clearance?

123quattro

You can make a spreadsheet with the cam to valve clearance and calculate it out. Or you can put some clay on top of a piston, assemble the head, spin the assembly one revolution, take the top end back apart, and then measure the thickness of clay left on top of the piston. Play-doh actually works pretty well. It only works with solid lifters though I think.

918-S

Well, I just purchased a set of M28/11 "S" cams to replace my broken left side cam. Can I send one left side US core and have one "S" cam made?

Does the base circle stay the same as stock?

Are they welding all the way around the lobe to maintain the stock base circle and lifter pre-load?

EDIT: never mind, I re-read the specs on your site.

andy-gts

do the choice c or d require cutting material off your piston pockets as they have much more lift.