Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> 2.7 RS+ or 3.2 ?
Eddie914
post Nov 25 2005, 09:07 PM
Post #1


Unregistered
The 2.7 in my teener dropped a valve and went kablammo last August. I bought a repacement 2.7 only to find metal chips in the sump screen.

Should I rebuild the 2.7(s) to RS specs

or install a 3.2?

I have found a local 3.2 with 79k for $4,000 (complete except intake manifold).

I don't think there is any way I'll be able to get the 2.7 rebuild done for less than $4,000 even if I perform all the labor. I've torn down the replacement 2.7 and the bad luck continues ... Alusil cylinders and chipped teeth on the countershaft chainwheel sprockets.

How about a 3.2 with 40IDA Webers? What cams? I know 46IDAs would be better but I have the 40IDAs off the 2.7.


Thanks for your input.

Eddie
Go to the top of the page
+Quote Post
2 Pages V  1 2 >  
 Reply to this topicStart new topic
Replies(1 - 19)
nine14cats
post Nov 25 2005, 09:11 PM
Post #2


Bill Pickering -- 914-6 GT aka....Leeloo
****

Group: Members
Posts: 2,618
Joined: 10-February 03
From: Campbell, CA
Member No.: 287
Region Association: None
Hi Eddie,

I'm really interested your thread as I am building a track only 914-6 and am debating currently between a 2.7 (2.8) or a 3.2. I've got Weber 40's in my garage, but I was wondering if they were too small for a 3.2. I hope you (we) get alot of answers!

Bill P.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
d914
post Nov 25 2005, 09:14 PM
Post #3


Advanced Member
****

Group: Members
Posts: 2,331
Joined: 12-July 03
From: Atlanta, ga
Member No.: 904
Region Association: South East States
sell the 40's and buy my 46"s...

seriously, street maybe,race motor???? I know a 2.5 that went to pmo 50's!!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
theol00
post Nov 25 2005, 09:27 PM
Post #4


Member
**

Group: Benefactors
Posts: 242
Joined: 22-January 04
From: Campbell, CA
Member No.: 1,586
I have a 2.7 RS spec motor with approx 220 - 230 hp with Webbers 40 IDAs - all i have heard about bigger carbs is that people have trouble getting their cars running - the motor runs great is very torquee and has a great power band between 4000 - 7300 RPM - usually I can pull away and out-accellerate from 3.0 SC powered cars on the track. The motor I have, has been build by GD Racing in San Bruno, CA (Gary Dielacher) and has been around for a while - approx 30+ trackdays. and is very reliable. Like everything Gary has build!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Nov 25 2005, 09:30 PM
Post #5


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
I would think go for buying a running motor rather than rebuilding. Just getting new pistons and cylinders will eat up a lot of your $4000. Of course, the gamble is, how long will it last?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Nov 25 2005, 10:33 PM
Post #6


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
it all depends on what you want it to do....

me? racer? 2.7/2.8
streeter? 3.2
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
retrotech
post Nov 25 2005, 10:38 PM
Post #7


retrotech
**

Group: Members
Posts: 470
Joined: 2-November 03
From: Mosier, Oregon
Member No.: 1,302
Hi Eddie,

I have 2.8 with 46mm webers. I had the engine dyno tuned, and the 46 are now great on the street, awesome on the track.
The intake noise alone is worth it.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TimT
post Nov 25 2005, 10:38 PM
Post #8


retired
****

Group: Members
Posts: 4,033
Joined: 18-February 03
From: Wantagh, NY
Member No.: 313
There is no replacement for displacement...

OK lets all sing along now LOL
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
J P Stein
post Nov 25 2005, 10:38 PM
Post #9


Irrelevant old fart
*****

Group: Members
Posts: 8,797
Joined: 30-December 02
From: Vancouver, WA
Member No.: 45
Region Association: None
For the carbs, 40s should work fine. Anderson has a formula in his book for sizing vevturi. pg 149.

Cams? With stock pistons, you're kinda stuck for stock for either....tho some think 964 cams are better for the 3.2L and will fit....supposedly.

The 3.2L has a problem with over revs.....the rod bolts are the weak spot......and it will bend every valve. The RS motor has a better chance but it's not bullet proof.

I guess my advice is it really doesn't matter. If it's a track motor you should build it as such (or have it done) or risk the consequences. Were it me, I'd go to Jeff Hines and have a long talk with him.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kdfoust
post Nov 26 2005, 12:06 AM
Post #10


Senior Member
***

Group: Members
Posts: 694
Joined: 2-January 03
From: Riverside
Member No.: 71
Region Association: Southern California
I thought about the same kinda stuff. I already made my descision: 3.2 Motronic. It will be a track car with an eminately driveable powerband and pretty high reliability.

The high performance paths are pretty well defined for both engines (well that goes for any of the Porsche flat-6 engines). To me the big advantage to the 3.2 is that it already comes with a modern engine control system that can support significantly more power with programing changes. But for me, I'm not a carb guy...no interest in them at all.

Either way you'll have some fun.

Later,
Kevin
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Nov 26 2005, 01:24 AM
Post #11


914 Wizard
**********

Group: Members
Posts: 10,432
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
3.2 Check it out Before you buy it.
79k probably needs guides
If its true , do it ,leave it stock , use the torque. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)
problem finding the injection, .5-1 k
I gots the carb stuff .

Flywheel ?

It will be a used motor , again. (IMG:http://www.914world.com/bbs2/html/emoticons/popcorn[1].gif)
3.2 used parts are $$$ very popular
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bleyseng
post Nov 26 2005, 09:46 AM
Post #12


Aircooled Baby!
**********

Group: Members
Posts: 13,034
Joined: 27-December 02
From: Seattle, Washington (for now)
Member No.: 24
Region Association: Pacific Northwest
Eddie won't care if it smokes some.... (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Steve
post Nov 26 2005, 10:17 AM
Post #13


914 Guru
*****

Group: Members
Posts: 5,589
Joined: 14-June 03
From: Orange County, CA
Member No.: 822
Region Association: Southern California
QUOTE (Aaron Cox @ Nov 25 2005, 08:33 PM)
it all depends on what you want it to do....

me? racer? 2.7/2.8
streeter? 3.2

I agree.
If your car is a track car you also want to make sure your car is maxed out in the class your competing in.
I heard the 3.2 will put you in a class with some pretty killer semi tube frame cars.
Otherwise I don't miss the hassle of the webers with the DME fuel injection.
I can start my car without touching the gas pedal.
It also has an altitude sensor that automatically adjusts the fuel injection when you drive in the mountains.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Eddie914
post Nov 26 2005, 10:57 AM
Post #14


Unregistered
Geoff is correct ...

I don't mind a little smoke out the tailpipe, but I do get annoyed with pieces of piston out the exhaust!

Eddie
Go to the top of the page
+Quote Post
Bleyseng
post Nov 26 2005, 11:27 AM
Post #15


Aircooled Baby!
**********

Group: Members
Posts: 13,034
Joined: 27-December 02
From: Seattle, Washington (for now)
Member No.: 24
Region Association: Pacific Northwest
Eddie uses the car mostly for track days and there are no class rules other than don't hit somebody else passing! (IMG:http://www.914world.com/bbs2/html/emoticons/av-943.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
J P Stein
post Nov 26 2005, 12:40 PM
Post #16


Irrelevant old fart
*****

Group: Members
Posts: 8,797
Joined: 30-December 02
From: Vancouver, WA
Member No.: 45
Region Association: None
Lookie here:

http://forums.pelicanparts.com/showthread....threadid=251729

Not cheep, but also not easy to find.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Downunderman
post Nov 26 2005, 01:06 PM
Post #17


Senior Member
***

Group: Members
Posts: 852
Joined: 31-May 03
From: Sydney, Australia
Member No.: 766
Region Association: Australia and New Zealand
GE 80 cams.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
propricer
post Nov 26 2005, 01:21 PM
Post #18


Member
**

Group: Members
Posts: 365
Joined: 16-April 04
From: Morgan Hill, CA
Member No.: 1,938
I 2nd the GE80 cams ... and 40's ... if you want low end out of a corner, you can't beat it. If you have a track with LONG straights, go with bigger displacement and / or bigger carbs. If its a mix of short and long and ax, go with smaller carbs and GE 80's.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nine14cats
post Nov 26 2005, 08:34 PM
Post #19


Bill Pickering -- 914-6 GT aka....Leeloo
****

Group: Members
Posts: 2,618
Joined: 10-February 03
From: Campbell, CA
Member No.: 287
Region Association: None
QUOTE (J P Stein @ Nov 26 2005, 10:40 AM)
Lookie here:

http://forums.pelicanparts.com/showthread....threadid=251729

Not cheep, but also not easy to find.

QUOTE


Sorry guys...I'm 2nd on the list if the first guys deal falls through.

(IMG:http://www.914world.com/bbs2/html/emoticons/happy11.gif)

Bill P.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
scotty b
post Nov 26 2005, 08:44 PM
Post #20


rust free you say ?
***************

Group: Members
Posts: 16,375
Joined: 7-January 05
From: richmond, Va.
Member No.: 3,419
Region Association: None
Eddie and anyone else. I'm may be interested in your JUNK parts as I am building a display motor to put with my 36 H.P. VW and 356 display engines. All I really need are the external pieces (block,cylinders,heads, shit box carbs etc) No internal parts are necessary. P.M. me with any info. I am also interested in 356 parts too.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 18th May 2024 - 10:04 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...