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 Pages V  1 2 >  
 Reply to this topicStart new topic
> chevy v8 and 901 1st gear ?, why should 1st not be used ??
jimkelly
post Jan 29 2007, 08:56 AM
Post #1


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
is it more a problem of not being good to downshift into 1st from 2nd or is it more of a dead stop start in 1st - could destroy tranny and why ??

thanks

jim
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dr. Roger
post Jan 29 2007, 09:24 AM
Post #2


A bat out of hell.
****

Group: Members
Posts: 3,944
Joined: 31-January 05
From: Hercules, California
Member No.: 3,533
Region Association: Northern California
1. It's the weakest gear and many have blown it.

2. 901's are geared for a 4/6 cyl. engine and is very low. Too low for a V8. Have you noticed that it is "etchy" when applying the throttle. So much torque comes on so quickly and causes a surge/jerk forwards and back and forward and back. It's controllable but ...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 10:01 AM
Post #3


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
Yes - I have only driven my car about 100 feet so far in 1st gear only - as I have no shift linkage yet : )

It seems to me that 1st might be good for only up to - what - 10 mph ??

For next short joy ride - I plan to manually put it in 2nd gear : ))

Jim
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sean_v8_914
post Jan 29 2007, 10:03 AM
Post #4


Chingon 601
****

Group: Members
Posts: 4,011
Joined: 1-February 05
From: San Diego
Member No.: 3,541
first gear hangs off teh end of the cluster supported by teh shaft on one side only. torque of a v8 is a bit much for it there. you can use 1st to move around teh yard or to put it on teh trailer...and what teh good DR said
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jan 29 2007, 10:46 AM
Post #5


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

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
(IMG:style_emoticons/default/agree.gif)

its cantaleverd off the intermediate plate with only a bearing on one side.....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
alpha434
post Jan 29 2007, 11:52 AM
Post #6


My member number is no coincidence.
****

Group: Members
Posts: 3,154
Joined: 16-December 05
From: Denver, CO
Member No.: 5,280
Region Association: Rocky Mountains
Dude. First gear is fine.

If you need to do any rock crawling, it'll be there!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 12:00 PM
Post #7


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
me and ROOT rebuilt a side shift for my v8 conversion that we finally got moving under its own power - sort of - yesterday. i know i could have blocked off first gear but figured - what the hell - fix it up too - must have had rock climbing in the back of my mind : ))

so anyway ...

ratio not much use with v8
canterlevered = weakness

thanks guys

jim
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mid_Engine_914
post Jan 29 2007, 12:06 PM
Post #8


Member
**

Group: Members
Posts: 195
Joined: 22-September 06
From: Left Coast
Member No.: 6,888
It's not a good idea to use the 901 tranny with a motor with that much hp.

http://www.914world.com/bbs2/index.php?sho...=66161&st=0
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 12:18 PM
Post #9


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
thanks for link - i will keep all posted on my experiences - jim

no hard clutch dropped launches are planned - my v8 is mostly for a bit of added hustle and reliability.

easy - gradual - peddle depressions are my intention : )
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jan 29 2007, 02:19 PM
Post #10


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
can you say BOOM!

actually gavel gravel gravel [the sound of nuts and bolt in a coffee can when stired]
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 02:28 PM
Post #11


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
from downshifting in to 1st from 2nd ??

from dropping clutch at 3000 rpm ??

from simply mashing the gas in 2nd ??

jim



QUOTE(messix @ Jan 29 2007, 12:19 PM) *

can you say BOOM!

actually gavel gravel gravel [the sound of nuts and bolt in a coffee can when stired]
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jan 29 2007, 02:50 PM
Post #12


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
anything involving first gear above idle.

then anything that would break the tires loose in the wet.

no clutch drops [300-400 ft lbs torque + small gears,syncros and thin shafts= boom!]
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fiid
post Jan 29 2007, 03:40 PM
Post #13


Turbo Megasquirted Subaru Member
****

Group: Members
Posts: 2,827
Joined: 7-April 03
From: San Francisco, CA
Member No.: 530
Region Association: Northern California
I guess the issue is that if you block it off you probably won't break it, but if you do break it off - you're not going to be able to use the broken shaft anymore... you'll have to find another one. It's not going to break in the right place such that you can keep using it - so you might as well set it up so you can't break it and save yourself the issue later.

It's not necessarily going to be something intentional... you might have wet feet and your foot slip off the clutch or something.

While you're in there - you'll probably want a taller 5th. I only have a subie motor and I want a taller 5th... (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 05:14 PM
Post #14


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
taller 5th - i will cross that bridge when I get to it.

can't imagine needing it for as sub - max rpm is higher than type4 - isn't it ??


don't really want to spend any more bucks if I can help it.

i am cool with running 65 mph at 3500 - i think - except maybe for mpg's : )

i'll let you know though ??

jim
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jan 29 2007, 07:22 PM
Post #15


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
ahhh a V8 at 3k on the freeway for an hour is against the Geneva convention for cruel and unusual punishment.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jimkelly
post Jan 29 2007, 07:32 PM
Post #16


Delaware USA
****

Group: Members
Posts: 4,969
Joined: 5-August 04
From: Delaware, USA
Member No.: 2,460
Region Association: MidAtlantic Region
now that is funny - i will confirm or refute this to be true as soon as i can - within 30 days I hope - thks - jim
(IMG:style_emoticons/default/biggrin.gif)
--

QUOTE(messix @ Jan 29 2007, 05:22 PM) *

ahhh a V8 at 3k on the freeway for an hour is against the Geneva convention for cruel and unusual punishment.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jan 29 2007, 07:52 PM
Post #17


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
just "ask the man who owns one"!

[old packard sales line]
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sww914
post Jan 29 2007, 08:18 PM
Post #18


Advanced Member
****

Group: Members
Posts: 2,439
Joined: 4-June 06
Member No.: 6,146
Region Association: None
If you floor it in first, you can twist the end of the shaft right off. I've seen one. That's the short term- the long term is the cantilever problem, mauling it in first all the time will blow out the bearing or worse. If you baby it in first you'll be fine, until something else goes.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jan 29 2007, 08:21 PM
Post #19


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
i would think first would be good to have to idle it up on a trailer if thats your thing.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
pffft
post Jan 29 2007, 08:57 PM
Post #20


Member
**

Group: Members
Posts: 189
Joined: 18-January 05
From: sierra foothills
Member No.: 3,465
QUOTE(messix @ Jan 29 2007, 06:21 PM) *

i would think first would be good to have to idle it up on a trailer if thats your thing.


Yeah, that's my thinking. I have a long steep dirt 1st gear
driveway and some very tight turns to get into the
garage. I know my 2.4cis motor was fairly happy starting
in 2nd, and I figure my very mellow 327 makes much more
torque at idle, but for getting from the road to my garage the
six was not AT ALL happy in 2nd.

Hopefully I'll find out soon.

patrick
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: Standard · Switch to: Linear+ · Switch to: Outline

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

- Lo-Fi Version Time is now: 1st June 2024 - 07:43 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 ...