964 cams in a 3.2L?

[doofdog]

I have heard of people doing this. I would like to know what the advantage is pros and cons if anyone out there has done it. thanks guys.

[Early_S_Man]

It can be done, but is a bit of a pain ... as more than one person who has done it has posted!

Much better would be the WebCam '20/21' grind which is slightly hotter, and usable with CIS or DME fuel injection systems.

www.webcaminc.com

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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler

[emcon5]

Are there any dyno numbers on what the 20/21 grind will do for an otherwise stock SC? With my SC's oil consumption, I see a top end rebuild in my future. This may be a good time to do an upgrade.

What would that $650 regrind get me?

Tom

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82 911SC Coupe

[magilla]

So, I see your valve job for this winter has turned into a very Leland-esque opportunity for added Bhp. Remember, if you do this, you won't be in the stock class at events any more.... You'll be running with the big boys (who will kick your butt worse than I did).

PS- Let me know when you start, so I can get my hands dirty....

Magilla
'83 SC (stock, but fast anyway).

[Early_S_Man]

Unless you add headers, SSI, or pre-75 heat exchangers and OEM muffler or sport muffler to the upgrade 'package' ... it won't be much help AT ALL! So, it starts to get pretty expensive to add 25-30 hp! Plan ahead, and think hard about smog checks and requirements over the next few years ... or you may regret the upgrade!

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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler

[emcon5]

OK, let's rephrase the question.

The consensus is that SSI's with a sport muffler are good for around 15-20 HP for an otherwise stock 3.0 engine. What additional HP gains, if any, would come from swapping the stock SC cams for 20/21 grind Webcams?

Tom


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82 911SC Coupe

[MMARSH]

Correct me if I'm wrong, but you mean a 964 cam profile as opposed to the actual 964 cams themselves. If thats the case changing to that cam profile is no big deal at all. This topic has been discussed here alot. Do a search and you will find alot of info.

Michael Marshall

[doofdog]

Magilla. you got it bud. we are going to have our hands full this winter. I am just looking into possible upgrades. I figure if we are in there maybe we should do some other things. oh yeah. those two tenths of a second will be the other way when we next meet. My wife will beat your ass next time.

I did do a search and couldn't find what I was looking for. there was so much I would have been reading for hours for the answer to my question. No thanks. I'd rather be driveing!

[Joe Bob]

I've done it on a 3.0 with CIS....Tom at Pelican has all the numbers and stats....invloves some cutting and changing and other things....but it was worth it.

[Superman]

It looks like I will be using the 20/21 grind when I do my top end rebuild and I believe I will be able to upgrade to the earlier exhaust system. I'm very excited, but I also do not know how this will affect my engine performance, other than a general expectation that horsepower will go up a bit. I liek horsepower as much as the next guy, but I also want to know how this might change the SHAPE of the power curve. I am hoping that horsepower will not fade away at 5000 or 5500 rpm like the stock motor does. It seems to me that these motors should produce power all the way to 600 rpm, at least. So, if anyone knows where to find some dyno results.......

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'83 SC

[Joe Bob]

With the 964 cams and CIS on the 3.0, the power came on 5-800 rpms sooner and pulled hard up to redline....I had the lmitter set at 7600 rpms. I bounced that puppy a few times...

Lemme know how the 20/21 cams work out...I am collecting parts for my 3.0 upgrade....

[Superman]

Thanks, Mike. That's EXACTLY what I want to hear. When more horsepower is claimed, I suspect that it has been loaded into a 1000 rpm range at the expense of performance elsewhere on the tach. At least that's the way u;ltra high performance cars are set up.....with a spiky power curve. Passenger cars are set up with more flat power curves, of course.

Anyway, if improved cams can give these cars higher peak hp AND ALSO widen the power band, then it seems clear much was sacrificed in the name of 'emission control.' I suspect a similar improvement happens with pistons that are not set up for emission control, such as the stock ones in my car. Thanks, Mike. I'm very excited.

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'83 SC

[hank911]

Hi Guys,I have an 83SC that I had to open up this past winter,head studs.While in the motor I went with the web cams 20/21,SSI's,and a Bursch,love the sound.While the valve job was being done I also "boat-tails" the intake stem area.Luckily I also did some suspention upgrades to make the added power more fun to drive.My mechanic said about 245 h.p. @ flywheel.I'm gonna dyno it soon so I'll post "rear wheel #'s.Drivability,the car starts pulling sooner,around 3grand,it pulls very hard through 7 grand,the cams make power up to about 7400r.p.m. per web cams.The thing I like is the rpm's spin up really quick and pull much further up the tach,I've taken 2nd gear to over 70mph.Around town it'll want to downshift a little earlly,a bit of overlap start to come on at low rpm's.The cams can take more fuel so 78-79 inj set ups work best,I'm told 930 even better.All in all the car feel's more like what I wanted out of the 911 driving experience. Philip Pallante..

[Joe Bob]

Yeah forgot about that....22mpg before the cam upgrade in a 2100 lbs 914/6.....

After the mods, 16 around town and 18 hwy..... it turned into a gas sucker.....but that's what about what I get in my un modified 911 now...