Dunasso

Mark, I'm sure that the plastic manifold could be fitted to an earlier 964s 3.6. However, I am unsure of what would be necessary for the swap, other than the manifold itself. I had a 90 964 C4 with an aluminum intake system, but never thought to look at the differences other than the noticable difference between aluminum and plastic. I have literal technical data on the various reasond why they made the change and some of the performance benefits, but nothing on what it would take to make the swap.

Duncan

Marc Shaw

I guess that is something to ask when I get to the OPC in the spring -- extra air intake is one thing but I think the weight reduction might be of more importance.

Not wanting to re-open the whole GTech thread, what is the optimal driving technique to get the best 0-60 times? I have ordered a GTech Pro and plan to delay/reverse any mods until I can do some baseline runs then do more runs as I add back bits (stock, cup airbox, G-pipe, etc) to really see how the changes make a difference (like Joey Bagabagels did -- ). I know the GTech is no dyno but it should be fairly consistent with itself assuming atmospheric conditions are similar. Rev to 6000 rpm and dump the clutch sounds harsh but might be needed so it does not bog down being a C4. Any thoughts?

Marc

bhensarl

I think you're going to put a whole bunch of wear on your clutch if you do that. But if you don't mind that, or you're planning on replacing it soon anyway, go for it!
Brian

Doug H

I was getting around 4.6 to 4.8 with 245 hp to the wheels and 242 torque to the wheels with my 90 cab. My G-Techs are posted if someone wants to search for them.

Marc Shaw

Umm...I wasn't suggesting that would be the best way but was asking what WOULD be the best way.

Thanks.

(I like my clutch.. ).

garrett376

Hi Doug H!! Good to see you around again!!!

Dunasso

Those Gtecs are the rage. I have considered a Gtec but it's not that high on priority list if you know what I mean.

Duncan

Kahdmus

DOUG H!!!!! Welcome back...I was getting worried!

leosayer

There are some very cheap G-Techs on ebay at the moment, although they look to be an older model.

Doug&Julie

That's a nice resource. Of all the books I check on the most, it's these "portfolio" books with articles from around the world (but mostly US and UK). I have some from the earlier cars, too. I consider them a "must have" for the library.

Marc Shaw

I think the ones on EBay are older Pro and Competition models. if you look at the GTech web site they are circa 1994/2001 and are no longer available.

Marc

Doug H

Hey guys. Thanks for the welcome. I have been lurking off and on.

Chris 911

The main reason for the difference in 0-60 times from factory is also how the different companies test these times. I have read somewhere that Porsche has 2 people in the car, and a full tank as they measure 0-60 times, but have read measurements of standard C2s in magasines as low as 5.1.

I could at least feel a great difference when I changed to RS-clutch and flywheel, as the response in acceleration was completely different. The RS also weight 7 kg less than the standard dual mass item. This is a great investment to any 964.

Has anyone experienced the rear wheels "jumping" for traction like I have? I saw a documentary of the modification of the "Elanor" Mustang Shelby, and that they fitted a support to avoid the rear wheels from doing this, any experience on this matter? Unlike many other cars, the 911 has incredible amounts of traction due to the weight over the rear wheels. A friend of mine made a joke about this after we had a drive in a Jag XKR, which at hard acceleration would spin on the rear wheels, (with smoke and the sound effects of a real burnout) whereas mine would be jumping seeming that the rear wheels had a lot more traction.

Colin 90 C2

Chris,
What wheels are you running?
I found that with the stock 16's, I could easily break loose the rear end, but with the 17's I really need to put in a lot of effort.

Doug H

I could smoke mine with no problems with 18 inch speedlines. I would also get some hop occassionally.