What is a G-grind?
mole
Hi all,
I'm getting a little bored with my '85 8v GTI and want to change the cam.
I read the term "G-grind" on this newsgroup but can't find any figures for
thos cam (lift,duration).I can't find it listed over here so can anyone
enlighten me? The last thing I want is a peaky engine,so what does it feel
like on the road?Is there a European equivalent?
Regards
Mole
Keith Imhoff
The g-grind has a 226 degree duration and .439" lift at .050" check
clearance. However, if your golf is an '85, you most likely have hydraulic
lifters, so the g-grind won't work. Depending on how much idle you want to
give up, Neuspeed has 272 and 268 degee camshafts that I hear work fairly
well. HOR also makes a sport camshaft with similar specifications that is
sold by Autotech at a reasonable $99 US price.
mole <mo...@nildram.co.uk> wrote in article
<01bbfa31$e290c2e0$7c0470c3@default>...
Hologram
The G-grind was the standard cam on the European GTI. I'm not sure of
the specs but any tuner catalog or EC magazine ad will probably have
something. It is, however, a solid lifter cam, and your 85 has
hydraulic lifters. I had one on my 83 GTI and it added some
noticeable mid and high rpm punch. I personally have no experience
with hydraulic cams but you can ask Randy Walters or one of the A2
gurus for advice about your best choice. Good luck.
Pete Mills
mole <mo...@nildram.co.uk> wrote in article
<01bbfa31$e290c2e0$7c0470c3@default>...
> Hi all,
>
> I'm getting a little bored with my '85 8v GTI and want to change the cam.
> I read the term "G-grind" on this newsgroup but can't find any figures
for
> thos cam (lift,duration).I can't find it listed over here so can anyone
> enlighten me? The last thing I want is a peaky engine,so what does it
feel
> like on the road?Is there a European equivalent?
>
> Regards
>
> Mole
Specifically it is about 0.423" lift, 283 degrees duration. This is on a
solid lifter cam, though. For your application, use the Techtonics/Neuspeed
cam, 268 degrees. Mild, but gives good power. Also the HOR cam is nice, but
a ittle more aggresive.
Pricing: TT/NS - $200.00 HOR - $98.00
Regards, Pete Mills
.
>
> mo...@nildram.co.uk
>
AWE16VR6
The TT 268 hydro sport cam is actually a factory Euro cam, and sells for $125.
Idle will become a tad rougher, but all low end power will be retained.
Todd
Air & Water
VW Tuning
Philadelphia
JT
Just a question, while we're on the subject...
Why didn't Volkswagen offer the g-grind cam in the US models? I'm
guessing that it was because of emissions reasons (?) So my reasoning
is that, if you put the g-grind in your A1, your car won't pass
emissions. Is this true? I don't exactly understand the legalities
concerning all of this. Can someone explain?
Another example, FYI, is some of the 1975-ish Camaros I see (or anything
else from that period) that are all built-up, and are somehow street
legal. High-rise intake manifold, 4-bbl. carb, hotter cam, etc. If
they had to be "super smogged" (thus powerless) back then, what would
change, allowing them to be built up now?
-JT
Mitch Manthey
In article <34B136...@REMOVEgis.net>, th...@REMOVEgis.net wrote:
= Just a question, while we're on the subject...
=
= Why didn't Volkswagen offer the g-grind cam in the US models? I'm
= guessing that it was because of emissions reasons (?) So my reasoning
= is that, if you put the g-grind in your A1, your car won't pass
= emissions. Is this true? I don't exactly understand the legalities
= concerning all of this. Can someone explain?
= Another example, FYI, is some of the 1975-ish Camaros I see (or anything
= else from that period) that are all built-up, and are somehow street
= legal. High-rise intake manifold, 4-bbl. carb, hotter cam, etc. If
= they had to be "super smogged" (thus powerless) back then, what would
= change, allowing them to be built up now?
=
= -JT
This is probably becuase the old Camero's are "grandfathered" exempt from
the emissions laws (maybe, this is just a theory, and I'm not exactly sure
when emissions started, but I know it was somewhere around that time). If
a vehicle was made before a DOT/State regulation was passed or enforced,
it doesn't have to coform to those laws.
Example - you can go down to Mexico and bring back a Beetle, but only if
the Beetle was made before the date that emissions, crash tests, ect were
passed.
Another example - a freind got pulled over in an old CJ5 becuase the seat
belt anchors were dragging on the road (through the rust holes in the body
=). The cop couldn't ticket him becuase this CJ was made before vehicles
were required to have seat belts.
Mitch Manthey
And my agent said "To make it in this town, you've gotta be bad.... Do you wanna be bad baby?" And I said "YEAH, BABY YEAH!!!" The Tick
Unspam my email: mitch...@centuryinter.net \\\> remove "20" to mail
Nathan J Nagel
Excerpts from netnews.rec.autos.tech: 5-Jan-98 Re: What is a G-grind? by
J...@REMOVEgis.net
> Just a question, while we're on the subject...
>
>
(other similar stuff snipped...)
I'm guessing that it's because manufacturers have to warranty the
emissions sytem, etc. so that the car will pas emissions for x number of
miles after new with only routine maintenance (I think the number here
is 100,000, but I may be wrong) while you can do whatever you want to
your car as long as it will pass the sniffer test. Basically the mfrs.
are allowing themselves a safety margin so they don't have to do
expensive, super-precise tuneups on all the cars they sell to satisfy
the law. I'm guessing a G-grind in a well-tuned car would probably pass.
Just a guess...
I believe Hor (should be an umlaut there) sells a cam similar to the
G-grind that is at least 49 state approved - draw your own conclusions.
nate
PlanetYODA
I have the Hor cam in my car. And from what I understand it is way more than a
G-grind. The cam has more duration and lift that the G cam, and has a
noticably rougher idle, not too bad though. I personally love my Hor cam,
it's a little softer on the bottom, but it pulls strong from 3000 on up. With
a little cam timing it's perfect
just my $.02
Tim
Tim
1981 Rabbit S
1.7, Hor Technologie, S&S, Neuspeed/Boge,
GTI updates, Supertrapp, Hella H4's, Fuba,
Custom EMPI oil cooler
Kris Rayner
The '77 1.6L have cams almost identical to G-grind.
--
----------------------------------------------------------------------------
-------------
Kris Rayner
"What, behind the rabbit?." -Monty Python
veri...@fix.net
http://www.geocities.com/Tokyo/2422/index.html
1981 Volkswagen Scirocco S--The Best Year
JT <th...@REMOVEgis.net> wrote in article <34B136...@REMOVEgis.net>...
> Just a question, while we're on the subject...
>
> Why didn't Volkswagen offer the g-grind cam in the US models? I'm
> guessing that it was because of emissions reasons (?) So my reasoning
> is that, if you put the g-grind in your A1, your car won't pass
> emissions. Is this true? I don't exactly understand the legalities
> concerning all of this. Can someone explain?
>
> Another example, FYI, is some of the 1975-ish Camaros I see (or anything
> else from that period) that are all built-up, and are somehow street
> legal. High-rise intake manifold, 4-bbl. carb, hotter cam, etc. If
> they had to be "super smogged" (thus powerless) back then, what would
> change, allowing them to be built up now?
>
> -JT
>