 HP Difference, Heat Exchangers |
|
|
|
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. |
|
|
| r_towle |
 Apr 6 2006, 07:43 PM
Post
#1
|
|
Custom Member  Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
 |
ok,
So , 73-74 2.0 liter HE with the dual outlets versus 75-76 2.0 liter with the single outlet HE's does anyone have an educated guess as to the HP difference??? Rich |
   |
 
|
  |
Replies(1 - 9)
| SGB |
Apr 6 2006, 07:49 PM
Post
#2
|
|
just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Wouldn't it depend on the cofiguration of the muffler chambers? If it is just dumping into a common passageway, unless stupid economy vs. fluid dynamics compromises were made and overall cross-section was reduced, I don't know if there is a difference.
|
|
|
|
| Bleyseng |
Apr 6 2006, 08:09 PM
Post
#3
|
|
Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
|
|
|
|
| SGB |
Apr 6 2006, 08:24 PM
Post
#4
|
||
|
just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
damn! Must reduce flow bigtime! |
||
|
|
|
||
| Bleyseng |
Apr 6 2006, 08:41 PM
Post
#5
|
|
Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Yes, I ripped out mine a few years ago and the change was noticeable after going to SSI HE's and a stock banana muffler.
|
|
|
|
| newto914s |
Apr 7 2006, 01:04 AM
Post
#6
|
||
|
Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
7 hp is the differance from 73-74 to 75-76 model years. Is that loss ALL attributed to the exhaust. I would have thought the smog pump, different injectors, and different ECU would have robbed a couple of horses respectively. And the Exhaust in-and-of-it-self would only be sitting on 4 or 5 hourses. Samson |
||
|
|
|
||
| Mueller |
Apr 7 2006, 04:04 AM
Post
#7
|
||||
|
914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
|
the injectors could not have any effect on the HP gain or loss... '75 1.8 have the same cr@ppy exhaust, no smog pump, yet nice gains from replacing the exhaust with an earlier one. the smog stuff on the 2.0 motors are not as bad as people make them out to be...it's the exhaust which is piss poor and I think they went with that design for cost reasons since the exhaust manifold is shared with the buses and one tube is cheaper than 2 tubes (per side) |
||||
|
|
|
||||
| ChrisFoley |
Apr 7 2006, 05:05 AM
Post
#8
|
||
|
I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
|
Yesterday I noticed the passenger side warm air duct on a 75/76 HE setup has a VW Audi symbol on it and was wondering what other vehicle they were sharing parts from.
|
||
|
|
|
||
| Bleyseng |
Apr 7 2006, 07:58 AM
Post
#9
|
|
Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
The bus guys are always looking for those crappy J tubes cuz their rusted out long ago. Yes, they are the same part.
The VW/Audi stamp just means they were manufactured by VW/Audi plants. Remember, they are giant automotive company compared to little Porsche at that time (one plant). Why do you think VW's Karmann plant built the 914? Porsche had no factories with the ability to mass produce a car in the 20,000 a year sales. Yes, its the crappy HE's that rob the hp. If you read this bbs enough, Jake and others have shown even stock show improvements in HP gains the best exhaust being Racer Chris's header system. 914 have restrictive exhaust and poor exhaust side flow stock. (IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) |
|
|
|
| rhodyguy |
Apr 7 2006, 08:02 AM
Post
#10
|
|
Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,090 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
and the whole system weighs more than the earlier version. the gains are two-fold.
k |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 8th June 2024 - 04:38 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.