 Type 4 rebuild questions |
|
|
|
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. |
|
|
| mepstein |
 Nov 19 2018, 08:14 PM
Post
#1
|
|
914-6 GT in waiting  Group: Members Posts: 19,578 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
 |
What can I do to rebuild my 1.7 for more HP and torque but keep the original d-jet.
piston and cylinders crank camshaft heads ? I know I can't change the cam too much but is there one that will do better and still work with d-jet. I know there is modern FI but I'm not interested. No carbs. I'm not looking for all out HP or dropping 10K on an engine kit. I just want a nice bump in power, if possible, while keeping a stock looking engine. |
   |
 
|
  |
Replies
| Valy |
Nov 21 2018, 01:14 AM
Post
#2
|
|
Senior Member Group: Members Posts: 1,677 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
The static CR doesn't say much without considering the cam as well.
The engine heats because of the dynamic CR that's influenced a lot by the cam profile. A longer duration for exhaust helps keeping the heads cooler. |
|
|
|
Posts in this topic
mepstein Type 4 rebuild questions Nov 19 2018, 08:14 PM
Mark Henry Webcam #73
96mm KB's for 66mm crank and move u... Nov 19 2018, 08:58 PM
mepstein
Webcam #73
96mm KB's for 66mm crank and move ... Nov 19 2018, 09:39 PM Chris914n6 The big difference with Djets is ecu and injectors... Nov 20 2018, 01:20 AM BeatNavy Mark (E) I'm doing a similar build right now. ... Nov 20 2018, 06:05 AM Racer I know a bump to a 1911 was always popular for 1.7... Nov 20 2018, 07:05 AM saigon71 FAT 440 MP camshaft is great with D-jet.
I think ... Nov 20 2018, 07:08 AM Literati914 Posted in the classifieds?, you amateur :poke:
... Nov 20 2018, 09:35 AM mepstein
Posted in the classifieds?, you amateur :poke:
... Nov 20 2018, 01:01 PM 914Sixer Correct me if I am wrong, but the stock 1.7 made 8... Nov 20 2018, 09:42 AM Racer
Correct me if I am wrong, but the stock 1.7 made ... Nov 20 2018, 11:22 AM porschetub
Correct me if I am wrong, but the stock 1.7 made... Nov 21 2018, 02:03 AM GregAmy "Subscribing". My 2L street car is runni... Nov 20 2018, 10:07 AM yellowporky getting ready to build up my 73 1.7 next month.
T... Nov 20 2018, 10:26 AM Alapone Just curious, has anyone built a motor with a 66mm... Nov 20 2018, 11:09 AM Mark Henry
Mark (E) I'm doing a similar build right now.... Nov 20 2018, 05:16 PM 914Sixer My bad, I got on the wrong info line. 88 hp was f... Nov 20 2018, 01:13 PM Jamie
My bad, I got on the wrong info line. 88 hp was ... Nov 20 2018, 02:41 PM thelogo If your stick in with djet = stay bone stock
If y... Nov 20 2018, 02:40 PM mepstein I already have 94mm Mahle P&C's, 2.0 crank... Nov 20 2018, 02:50 PM rgalla9146
I already have 94mm Mahle P&C's, 2.0 cran... Nov 21 2018, 04:58 PM mepstein
I already have 94mm Mahle P&C's, 2.0 cra... Nov 21 2018, 05:15 PM rgalla9146
[quote name='rgalla9146' post='2667542' date='Nov... Nov 21 2018, 06:02 PM mepstein
[quote name='rgalla9146' post='2667542' date='No... Nov 21 2018, 06:16 PM worn
[quote name='rgalla9146' post='2667542' date='Nov... Nov 21 2018, 06:14 PM JOEPROPER I think you're right about looking at HP incre... Nov 20 2018, 04:24 PM TravisNeff The CA spec 73 1.7 was 72 HP, lower than the 1.8 b... Nov 20 2018, 05:03 PM 76-914 Leave it stock and keep the RPM's up. Those ar... Nov 20 2018, 05:06 PM jcd914 Stock 1.7L at 8.2:1 compression ratio was 80HP (72... Nov 20 2018, 07:51 PM mepstein
Stock 1.7L at 8.2:1 compression ratio was 80HP (7... Nov 20 2018, 08:06 PM worn
Stock 1.7L at 8.2:1 compression ratio was 80HP (... Nov 20 2018, 09:09 PM mepstein
[quote name='mepstein' post='2667271' date='Nov 2... Nov 20 2018, 09:17 PM JamesM I think you are starting in the wrong place. the g... Nov 21 2018, 03:18 AM mepstein
I think you are starting in the wrong place. the ... Nov 21 2018, 07:29 AM scott_in_nh
Ditch the d-jet and you could do something like t... Nov 21 2018, 11:21 AM Front yard mechanic You could always turbo Nov 21 2018, 08:28 AM ClayPerrine
You could always turbo
OK.. I have to say it..... Nov 21 2018, 01:13 PM worn
You could always turbo
OK.. I have to say it.... Nov 21 2018, 06:10 PM Dave_Darling
"You can't turbo a 914!!!... Nov 22 2018, 02:24 PM 914forme Source a 2.0L bus intake and that keeps the D-Jet ... Nov 21 2018, 04:31 PM cgnj Mark,
Here is the link regarding the plenums.2270 ... Nov 21 2018, 09:06 PM ottox914 See the various builds linked in my sig. Very hap... Nov 24 2018, 10:23 PM |
5 User(s) are reading this topic (5 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 31st October 2024 - 04:59 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.