 for V8 guys only, new engine config. |
|
|
|
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. |
|
|
| messix |
 Nov 28 2006, 10:05 PM
Post
#1
|
|
AKA "CLUTCH KILLER"!  Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest  |
well maybe not, some one has had to have done this it's seems to easy.
so i was brain storming some engine configurations based on sbc, looking around there are pistons for a 353ci [327 crank with a 400 block 6" rod]. but why not a 400 block and a 283 or 302 3" crank for a 320ci. thats stock 400 pistons with a 1.433 compression height, and a 6" rod. now that should work 3" stroke 1.5 piston compression height 1.433 rod length 6 ______ equals 8.933 deck height 9.025 - 8.933 _____ deck to piston .092 so with a 58cc head and a .039 head gasket i come up with a 8.9/1 compression ratio. i have seen sbc 400 engines lately for $250 or less and 283 cranks almost for free. a set of adapter bearings would do the trick. so wadda ya think? |
   |
 
|
  |
Replies
| dakotaewing |
Nov 28 2006, 10:48 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1,160 Joined: 8-July 03 From: DeSoto, Tx Member No.: 897 Region Association: Southwest Region 
|
Would you not be better off with 5.7" rods?
I am no engine builder, but the engine builders I talked to trying to figure my configuration told me I need to stay away from the 6" rods - meaning that the motor would be a dog, and increased rod speed would not help ??? I am open to comments... TE |
|
|
|
| messix |
Nov 28 2006, 11:14 PM
Post
#3
|
|
AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
QUOTE(dakotaewing @ Nov 28 2006, 08:48 PM)  Would you not be better off with 5.7" rods? I am no engine builder, but the engine builders I talked to trying to figure my configuration told me I need to stay away from the 6" rods - meaning that the motor would be a dog, and increased rod speed would not help ??? I am open to comments... TE i need the 6" rod to get the piston up the hole at tdc. a 5.7 rod would put it to far down to make any compression, this due to no know to me pistons for this stroke. as to rod speed, the short stroke of the crank effectively slows the crank/piston speeds down per rpm [distance traveled per rpm] some thing that bugs me about this config is that it puts the piston down the hole .093. thats alot of dirty space on the flame travel in combustion chamber. if i used a 377 piston [400 block with a 350 crank [3.48 stroke] and 5.7 rod, it has a compression height of 1.561. that would put it .036 out of the hole. head gasket of .070 puts it down .034 down for clearance. not to far off .025 for block and steal shim gasket on stock. |
|
|
|
Posts in this topic
messix for V8 guys only Nov 28 2006, 10:05 PM
Brett W Tim/Bynbad914 used the exact same combo. It revs ... Nov 28 2006, 10:22 PM messix you can go lite for $4,000 bare block in alum... Nov 28 2006, 10:37 PM drive-ability I like the idea, I am looking in the same basic ar... Nov 28 2006, 10:38 PM
messix |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th June 2024 - 05:59 AM |
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 ... |