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Search: Posts Made By: Steve@Rennsport
Forum: Porsche 911 Technical Forum 02-22-2018, 09:08 AM
Replies: 9
Views: 390
Posted By Steve@Rennsport
Totally agree. One question I have for the...

Totally agree.

One question I have for the OP is how long do you want the engine to last?

To me, that helps frame the choice of pistons to use.
Forum: 911 Engine Rebuilding Forum 02-19-2018, 06:32 PM
Replies: 9
Views: 407
Posted By Steve@Rennsport
Nossir, it was optional in '73-on.

Nossir, it was optional in '73-on.
Forum: Porsche 911 Technical Forum 02-16-2018, 09:13 AM
Replies: 3
Views: 213
Posted By Steve@Rennsport
It can be done using the later fan housing, but I...

It can be done using the later fan housing, but I would NOT recommend it.

Straight-blade fans flow more air and thats exactly what mag-cased engines need. Use an 11-blade 2.4-2.7 fan with the...
Forum: 911 Engine Rebuilding Forum 02-16-2018, 09:10 AM
Replies: 17
Views: 345
Posted By Steve@Rennsport
I've been using welded cams in various motors and...

I've been using welded cams in various motors and have no angst if:

1) The welding job is done properly

2) The rocker arms are properly refaced (not as easy as you think)

3) Correct break-in...
Forum: 911 Engine Rebuilding Forum 02-16-2018, 09:05 AM
Replies: 1
Views: 137
Posted By Steve@Rennsport
I would ask Paul Abbott at Performance Oriented....

I would ask Paul Abbott at Performance Oriented. He is THE best!!!!
Forum: 911 Engine Rebuilding Forum 02-15-2018, 11:10 AM
Replies: 12
Views: 293
Posted By Steve@Rennsport
The only time I use aftermarket springs are in...

The only time I use aftermarket springs are in race (or track) engines that will see continuous use in excess of 7K RPM.

Its very important to choose such springs wisely since many of them are...
Forum: Porsche 911 Technical Forum 02-11-2018, 01:32 AM
Replies: 20
Views: 1,585
Posted By Steve@Rennsport
Float levels must be PERFECT,....no room for...

Float levels must be PERFECT,....no room for "Kentucky Windage".

You must have 3.5 psi for these carbs to work properly and correct float levels depend on that.

Make sure your jetting package...
Forum: Porsche 911 Technical Forum 02-10-2018, 04:10 PM
Replies: 20
Views: 1,585
Posted By Steve@Rennsport
Lots of questions: 1) Did you check and...

Lots of questions:

1) Did you check and adjust float levels?

2) Do you have 3,5 psi of regulated fuel pressure?

3) What size are your venuries, idle jets,main jets and which emulsion tubes...
Forum: Porsche 911 Technical Forum 02-09-2018, 01:41 PM
Replies: 16
Views: 577
Posted By Steve@Rennsport
Dave, You REALLY want to use Viton O-rings...

Dave,

You REALLY want to use Viton O-rings as those are only ethanol-resistant ones.
Forum: Porsche 911 Technical Forum 02-09-2018, 01:36 PM
Replies: 19
Views: 777
Posted By Steve@Rennsport
He is THE man for these things. Nobody better,...

He is THE man for these things. Nobody better, IMHO.
Forum: Porsche 911 Technical Forum 02-08-2018, 01:22 PM
Replies: 32
Views: 952
Posted By Steve@Rennsport
Its in Rothmans livery so it looks just like the...

Its in Rothmans livery so it looks just like the ones you see on the Internet. :)
Forum: Porsche 911 Technical Forum 02-08-2018, 09:44 AM
Replies: 32
Views: 952
Posted By Steve@Rennsport
We have a genuine SC/RS at the shop right now and...

We have a genuine SC/RS at the shop right now and its a TOTALLY different animal from any SC,.....:) :)

Remember, the 3.0RS was a street car made for RSR homologation. The SC/RS is a race/rally...
Forum: 911 Engine Rebuilding Forum 02-08-2018, 09:38 AM
Replies: 11
Views: 335
Posted By Steve@Rennsport
Hi Greg, Basic chamber volumes are the same...

Hi Greg,

Basic chamber volumes are the same between all of the 2.2-2.4 heads. 2.7 ones are slightly larger. I would strongly recommend measuring yours so you know precisely what your CR will be as...
Forum: Porsche 911 Technical Forum 02-07-2018, 08:40 PM
Replies: 32
Views: 952
Posted By Steve@Rennsport
Oh yes. :) :) You simply need to pore over...

Oh yes. :) :)

You simply need to pore over every book & manual pertinent to these two vehicles and then source all the special parts & components needed to build a period-correct example. While...
Forum: 911 Engine Rebuilding Forum 02-07-2018, 04:23 PM
Replies: 2
Views: 183
Posted By Steve@Rennsport
I've used SSI's on these early cars for 30+ years...

I've used SSI's on these early cars for 30+ years with excellent success. Used with a factory muffler or equivalent Dansk, its a nice combination.

The ducting & hardware is the same as all the...
Forum: 911 Engine Rebuilding Forum 02-01-2018, 09:50 AM
Replies: 5
Views: 495
Posted By Steve@Rennsport
FWIW,..... I've used 964 cams in a Turbo...

FWIW,.....

I've used 964 cams in a Turbo motor quite a few times over the past 25 years and its based on how the car will be used. For street cars, I prefer SC cams in these things.

You may...
Forum: Porsche 911 Technical Forum 01-26-2018, 09:27 PM
Replies: 26
Views: 714
Posted By Steve@Rennsport
I haven't had too many failures, however my...

I haven't had too many failures, however my complaints are with uneven cylinder-to-cylinder timing variations. I've seen as a much as 4 degrees which can spell BIG trouble if you are a little...
Forum: 911 Engine Rebuilding Forum 01-26-2018, 09:19 PM
Replies: 4
Views: 436
Posted By Steve@Rennsport
Same cams used in both engines, but timed...

Same cams used in both engines, but timed differently.

ROW cars had different cam & ignition timing, as well as CR which were all configured for 98 RON fuel which is 93 R+M/2 USA gasoline.

Make...
Forum: 911 Engine Rebuilding Forum 01-16-2018, 09:24 PM
Replies: 8
Views: 339
Posted By Steve@Rennsport
Hi Gordon, Those vials are designed to be...

Hi Gordon,

Those vials are designed to be used for Zenith as well as Weber 3bbl carbs, hence the two set of lines. The upper ones are for the Webers and the lower set is for Zeniths.

The float...
Forum: 911 Engine Rebuilding Forum 01-16-2018, 09:02 AM
Replies: 8
Views: 339
Posted By Steve@Rennsport
I think its time to mention that Weber float...

I think its time to mention that Weber float levels are critical and MUST be perfect,....not just very close, but perfect. This assures consistent running/jetting, driveability, performance, and...
Forum: 911 Engine Rebuilding Forum 01-07-2018, 08:35 PM
Replies: 12
Views: 674
Posted By Steve@Rennsport
OH so very true. :) Its not like ordering an...

OH so very true. :)

Its not like ordering an entree off of a restaurant menu. :) :)
Forum: Porsche 911 Technical Forum 01-03-2018, 09:44 AM
Replies: 48
Views: 12,066
Posted By Steve@Rennsport
Don't forget, bending the steering arms...

Don't forget, bending the steering arms effectively shortens them and that changes the Ackerman effect.

There are computer programs that allow you to model such suspension changes to see if you...
Forum: Pacific NorthWest -US (WA/ID/OR/UT/HI/AK) 01-02-2018, 03:53 PM
Replies: 5,951
Views: 303,884
Posted By Steve@Rennsport
You are quite welcome!! :)

You are quite welcome!! :)
Forum: Pacific NorthWest -US (WA/ID/OR/UT/HI/AK) 01-02-2018, 02:14 PM
Replies: 5,951
Views: 303,884
Posted By Steve@Rennsport
Look for a car with the 9A1 engine and the later...

Look for a car with the 9A1 engine and the later the better. You'll save zero money with a cheaper one that needs $10K worth of work (valve decarbonization and more).
Forum: Porsche 911 Technical Forum 01-01-2018, 01:29 PM
Replies: 3
Views: 285
Posted By Steve@Rennsport
Here is the best answer for your unique...

Here is the best answer for your unique situation. :)

Once you fiinalize which engine you will use, a PMO kit can be precisely configured for you.
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