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 )

> Best Cam for 2056 and Dub Shop EFI?
bkrantz
post Jul 14 2021, 08:11 PM
Post #1


914 Guru
*****

Group: Members
Posts: 8,175
Joined: 3-August 19
From: SW Colorado
Member No.: 23,343
Region Association: Rocky Mountains
Since I had to tear down my partially built engine (to have the case decked), I have a second chance to choose a cam shaft. This build will be a 2056, target compression ratio of about 8.6:1, and the complete EFI and electronic ignition from the Dub Shop (based on Megasquirt 2).

Any wise suggestions?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 12)
EdwardBlume
post Jul 14 2021, 10:59 PM
Post #2


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

Group: Members
Posts: 12,338
Joined: 2-January 03
From: SLO
Member No.: 81
Region Association: Central California
9590 Raby / LN Engineering- $$$$
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
euro911
post Jul 15 2021, 01:07 AM
Post #3


Retired & living the dream. God help me if I wake up!
*****

Group: Members
Posts: 8,860
Joined: 2-December 06
From: So.Cal. & No.AZ (USA)
Member No.: 7,300
Region Association: Southern California
I ran a Raby 9580 with 9.5:1 C/R and IDF-40 carbs ... not sure with MS EFI. Maybe consult with Jake or Len (IMG:style_emoticons/default/confused24.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BeatNavy
post Jul 15 2021, 03:48 AM
Post #4


Certified Professional Scapegoat
****

Group: Members
Posts: 2,944
Joined: 26-February 14
From: Easton, MD
Member No.: 17,042
Region Association: MidAtlantic Region
The cam the type 4 store currently markets for being slightly more aggressive yet compatible with FI is the 9590. I've had one in a 2056 with D-Jet and now in my 2270 with microsquirt. It's excellent, with the possible exception that the first 30 seconds of a cold start require some throttle feathering. It really wants more air than the TB can give it when stone cold.

On the 2056 I was running 8.6 and the 2270 is 9.0. Same situation on each, although I think Jake said it really isn't designed for CR above 8.5 / 8.6.

I've seen others say similar things, so it's likely not just me.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
914Sixer
post Jul 15 2021, 06:00 AM
Post #5


914 Guru
*****

Group: Members
Posts: 9,034
Joined: 17-January 05
From: San Angelo Texas
Member No.: 3,457
Region Association: Southwest Region
Elgin 330-1 might work. Click to open


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ClayPerrine
post Jul 15 2021, 07:49 AM
Post #6


Life's been good to me so far.....
***************

Group: Admin
Posts: 15,950
Joined: 11-September 03
From: Hurst, TX.
Member No.: 1,143
Region Association: NineFourteenerVille
QUOTE(BeatNavy @ Jul 15 2021, 04:48 AM) *

The cam the type 4 store currently markets for being slightly more aggressive yet compatible with FI is the 9590. I've had one in a 2056 with D-Jet and now in my 2270 with microsquirt. It's excellent, with the possible exception that the first 30 seconds of a cold start require some throttle feathering. It really wants more air than the TB can give it when stone cold.

On the 2056 I was running 8.6 and the 2270 is 9.0. Same situation on each, although I think Jake said it really isn't designed for CR above 8.5 / 8.6.

I've seen others say similar things, so it's likely not just me.


(IMG:style_emoticons/default/agree.gif)

Put one of the Raby 9590 cam kits in Betty's motor. It ran great and pulled strong, but didn't want to idle dead cold. Feathering the throttle for the first minute always worked.

Clay
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
barefoot
post Jul 15 2021, 11:23 AM
Post #7


Senior Member
***

Group: Members
Posts: 1,334
Joined: 19-March 13
From: Charleston SC
Member No.: 15,673
Region Association: South East States
I'm using WEB #494 cam & tappets with carbed 2056 at about 8.6 CR. Good low-mid range torque I usually ignore 1st gear unless an up-hill start. I'm happy with it
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
colingreene
post Jul 15 2021, 07:48 PM
Post #8


Senior Member
***

Group: Members
Posts: 731
Joined: 17-October 13
From: Southern California
Member No.: 16,526
Region Association: Southern California
Did you ask the dub shop?

Id go for 9.0 compression.
If its the carb style throttle you can get away with a lot more cam.
really with that efi you can put a pretty rowdy cam in it anyway.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bkrantz
post Jul 15 2021, 10:15 PM
Post #9


914 Guru
*****

Group: Members
Posts: 8,175
Joined: 3-August 19
From: SW Colorado
Member No.: 23,343
Region Association: Rocky Mountains
Thanks, everyone. I have twin IDF throttle bodies and (for now) stock 2.0 heads.

I have also asked Mario.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
djway
post Jul 15 2021, 11:28 PM
Post #10


Senior Member
***

Group: Members
Posts: 787
Joined: 16-October 15
From: Riverside
Member No.: 19,266
Region Association: Southern California
The T4 in my notchback 78x96 9.0to1 has the Webcam 73 in it with the L Jet. It gets your attention.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JamesM
post Jul 16 2021, 08:53 AM
Post #11


Advanced Member
****

Group: Members
Posts: 2,023
Joined: 6-April 06
From: Kearns, UT
Member No.: 5,834
Region Association: Intermountain Region
The nice thing about Megasquirt is one way or another it should be able to fuel whatever motor you want to build so the idea of a "best" cam is going to be relative to personal preference and the rest of your engine build.


My personal preference MORE!!! More cam, more compression, more headflow etc.


Among other things I have put megasquirt on both a 2270 with ITBs and a torquey cam that was done making power by ~5500 and a 2056 with higher compression, a hotter cam, and better flowing heads on a 1.8 plenum that didnt even come on cam until around 3800 rpm and I think the 2056 is WAY more fun to drive. But you have to wind it out to get the most out of it and that isnt for everyone




QUOTE(bkrantz @ Jul 14 2021, 06:11 PM) *

Since I had to tear down my partially built engine (to have the case decked), I have a second chance to choose a cam shaft. This build will be a 2056, target compression ratio of about 8.6:1, and the complete EFI and electronic ignition from the Dub Shop (based on Megasquirt 2).

Any wise suggestions?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bkrantz
post Jul 16 2021, 07:53 PM
Post #12


914 Guru
*****

Group: Members
Posts: 8,175
Joined: 3-August 19
From: SW Colorado
Member No.: 23,343
Region Association: Rocky Mountains
At the risk of blowing this discussion wide open, what about heads and valves? While I am dreaming of options, what about after-market heads? Bigger valves?

FWIW I wish for a motor that is mostly easy to live with, and with a bit more go than stock. To hazard a number, something like 120 hp.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
djway
post Jul 16 2021, 08:14 PM
Post #13


Senior Member
***

Group: Members
Posts: 787
Joined: 16-October 15
From: Riverside
Member No.: 19,266
Region Association: Southern California
QUOTE(bkrantz @ Jul 16 2021, 06:53 PM) *

At the risk of blowing this discussion wide open, what about heads and valves? While I am dreaming of options, what about after-market heads? Bigger valves?

FWIW I wish for a motor that is mostly easy to live with, and with a bit more go than stock. To hazard a number, something like 120 hp.

I went with 44x38 stainless valves.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
2 User(s) are reading this topic (2 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: 26th December 2024 - 05:30 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 ...