924Board.org

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

Anyone try an adjustable cam gear with the stock camshaft?
Is it worth it?
What’s the result?
Would you recommend it?

Thanks

Rich H · Posted: Tue May 20, 2008 3:16 am Post subject:

Pointless with standard engine bits, what would you adjust for? If you have a manufacturing problem you could tune that out perhaps, but its alot of work for no result.

IMHO of course!

Rich
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Scorpio · Posted: Tue May 20, 2008 7:40 pm Post subject:

would it be beneficial on a BAE turbo install? looking for some serious acceleration as opposed to top end speed...p.s sorry to hijack

_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

Rich H · Posted: Tue May 20, 2008 9:00 pm Post subject:

Again I doubt it. You may get a little bit more torque or top end, but I doubt you will notice! If it was a Twink you could play with overlap and so on, but as a SOHC you are stuck with the profile you have.
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

!tom · Posted: Wed May 21, 2008 2:28 am Post subject:

The motivation for an adjustable cam gear is often to set the cam timing back to the stock value after machining the head or block (as appropriate) to increase compression. A light skim of either surface to get it back to true is not going to make much of a difference to the timing.
_________________
78 924 NA
5-lug

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

My suggestion: if cam tuning is required, use adjustable cam pulley, tune it and then have new groove machined to stock pulley in the correct location.
It's not good to have another potential failure place (bolts on the pulley).
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

From what I read, adjustable cam gear is design to move the power band to get more low end or top end. Since the 924 power band with the 4 speed tranny is low, I was hoping to move it up a little bit to hopefully get better performance.

Rich H · Posted: Thu May 22, 2008 12:30 am Post subject:

Maybe, but your cash would be better spent elsewhere... Like a 5 speed box perhaps!

Adjustable cam gear and Franco cam gear are different beasts entirely.... Adjustable cam gear is traditionally for correctly timing wild cams. If its possible to alter power bands I would be very interested but I don't think it will work...
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

bass gt · Posted: Thu May 22, 2008 3:41 am Post subject:

Rich H · Posted: Thu May 22, 2008 6:38 am Post subject:

Cool.

I'll have a play then I bought one for my planned engine upgrade and fitted it as it was shiney. I'll have a play when I get a chance. Its a piper one so only +/- 3 degrees unless all the screws fall out...
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Scorpio · Posted: Thu May 22, 2008 10:06 am Post subject:

keep us informed rich H !
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

Rich H · Posted: Thu May 22, 2008 5:22 pm Post subject:

I'm on hols for 2 weeks as of Tues, and I haev a bit of a bodywork issue at the moment.... Bugger....
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Scorpio · Posted: Thu Sep 18, 2008 1:44 pm Post subject:

rich..any progress on the cam gear?
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

Rich H · Posted: Thu Sep 18, 2008 5:12 pm Post subject:

Nope, its fitted but I have't played with it yet. Been busy with everything else!

I'll try and remember and have a go next week.
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec