Home | Register | Login | Contact Us

 
Auto Math
Classifieds
Forum
Gallery
Games
Garage
Tech Articles
Utilites
 
FAQFAQ    SearchSearch    RegisterRegister    Log inLog in    Log in to check your private messagesLog in to check your private messages    Forum Subscriptions1/4 Mile Table 

High comp SBC mystery motor and pump gas.
Goto page Previous  1, 2, 3  Next
 
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Small Block Gen 1
View previous topic :: View next topic  
Author Message
Knarley Darley
Member


Joined: 22 Apr 2004
Posts: 1247

540238.26 points



PostPosted: Sun Jan 06, 2013 11:16 pm    Post subject: Reply with quote

Not all mini starters are the same. The cheap ones are worse than stock ones. Make sure it has a good 1000 amp battery, and as has been stated check the voltage drop cranking. It should be 10.5-11 volts minimum. Have you cranked it with the coil wire disconnected? Maybe has nothing to do with compression, just cable size, starter, battery, ect. Welding cable is the best for long distance battery location, the bigger the better. If the cam is big the cranking compression should not be much higher (if any) than stock.
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Mon Jan 07, 2013 10:05 am    Post subject: Reply with quote

Knarley Darley wrote:
Not all mini starters are the same. The cheap ones are worse than stock ones. Make sure it has a good 1000 amp battery, and as has been stated check the voltage drop cranking. It should be 10.5-11 volts minimum. Have you cranked it with the coil wire disconnected? Maybe has nothing to do with compression, just cable size, starter, battery, ect. Welding cable is the best for long distance battery location, the bigger the better. If the cam is big the cranking compression should not be much higher (if any) than stock.


That was my first question which I did ask "Which gear reduction starter are you using?" but never got an answer. Glad most of use have had similar experience with this. My 1/0 solution was a set it and forget it kit that I bought from the now defunct H-O Racing back in the early 90s.

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
jeep_406
Member


Joined: 12 Sep 2002
Posts: 1661
Location: Tewksbury, Mass 01876
53123.48 points


1972 Chevrolet Nova

PostPosted: Mon Jan 07, 2013 12:04 pm    Post subject: Reply with quote

I would think you'll get away with breaking in the engine on pump gas as long as you're not putting a load on it.

Can you see if the pistons have a dome or not looking through the plug hole with a wand ?

Are the battery cables getting hot? Wondering if the ground is big enough or dirty.

I think I read that you checked that TDC is really TDC.

Hopefully the owner gives you the OK to check it out.
Back to top
View user's profile Send private message Send e-mail
89Gmcsierra
Member


Joined: 28 Oct 2012
Posts: 65
Location: Hazleton, Iowa
2274.42 points



PostPosted: Thu Jan 10, 2013 12:50 pm    Post subject: Reply with quote

I'd first try new battery wire. had that issue with my truck for a while. i had 0/1 gauge. and it hated the distance. hooked up factory idk 4ga and put under the hood cranks like a dream. the wire i was using ended up looking it up it was like alluminized copper it was horrible.

my friends nova he bough that DIY rear batter setup and ended up scraping the wire that came with it. we ended up using the lead wire from an old stick welder and it cranks over amazingly.
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Thu Jan 10, 2013 3:21 pm    Post subject: Reply with quote

Yes Welding cable is nice for this application it is flexible and carries the juice a long distance with little or no drop in voltage. Hope to hear the results soon. Not that I should be the one to say that with my long delayed new 408 setup.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
disturbthepeace1
Member


Joined: 14 Jun 2003
Posts: 303
Location: Stanton, CA
10195.60 points


1965 Volkswagen Beetle

PostPosted: Thu Jan 10, 2013 5:07 pm    Post subject: Reply with quote

Sorry guys I haven't got back to looking at the nova because of some other cars that needed some attention but I plan to be at it again on tmrw with a freshly charge optima red top bat and my meter. The starter is a jegs mini starter and looks like a standard issue gear reduction body with the Nippon(?) motor.

It cranked at a decedent speed but as soon as it wanted to fire it would slow to a halt. I Plan on checking cranking compression to.


Thank for the input

Joe

_________________
http://www.dtpprecisionrebuilding.com
Back to top
View user's profile Send private message Visit poster's website
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Fri Jan 11, 2013 10:49 am    Post subject: Reply with quote

Cool. I have an old Hamburger Nippon that was great for years then had issues. What I first thought was that it just needed a new pinion gear and bearings. Replaced all of those still NG. Looked at it again and there is a small crack in the armature causing it to be intermittent. Now I have the JEGS Maxi Prostart'r which seems to be a nice unit but I did have to grind it to fit a small 153 tooth flexplate. The starter was hitting the block when moved into the inside set of holes for the small flex plate. Not sure what is going on at Jegs it is a small block Chevy. I shouldn't be grinding anything to make it fit. Rolling Eyes
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
disturbthepeace1
Member


Joined: 14 Jun 2003
Posts: 303
Location: Stanton, CA
10195.60 points


1965 Volkswagen Beetle

PostPosted: Fri Jan 11, 2013 9:51 pm    Post subject: Reply with quote

Ok this what I got,

Bore scoped and can see big domes.

210cold cranking psi

Voltage drops to 10.7-.5 while free cranking with ignition disconnectect

Voltage will drop to 6.4-7 when cranking and trying to fire.

Most times when it sounds like it wants to fire up but it will diesel back wards and that's when the voltage drops

I retard the timing but then it doesn't even come close to firing up, I don't feel the starter is the problem.. It might be the voltage dropping low enuf to make the MSD stop firing or ??

Need larger cable, but I have a feeling that this is a three dimensional problem meaning that there is something else going on here.

I have got this thing to fire up and idle out, it reved up nice but WTF...

_________________
http://www.dtpprecisionrebuilding.com
Back to top
View user's profile Send private message Visit poster's website
disturbthepeace1
Member


Joined: 14 Jun 2003
Posts: 303
Location: Stanton, CA
10195.60 points


1965 Volkswagen Beetle

PostPosted: Fri Jan 11, 2013 10:54 pm    Post subject: Reply with quote

Flat cam...?
_________________
http://www.dtpprecisionrebuilding.com
Back to top
View user's profile Send private message Visit poster's website
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Sat Jan 12, 2013 1:15 am    Post subject: Reply with quote

check your grounds....... battery to block, block to frame, frame to body. make sure there is no paint between the block and starter. if there is, it doesnt have a good ground.
_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

Back to top
View user's profile Send private message
disturbthepeace1
Member


Joined: 14 Jun 2003
Posts: 303
Location: Stanton, CA
10195.60 points


1965 Volkswagen Beetle

PostPosted: Sat Jan 12, 2013 12:04 pm    Post subject: Reply with quote

10sec.et wrote:
check your grounds....... battery to block, block to frame, frame to body. make sure there is no paint between the block and starter. if there is, it doesnt have a good ground.



Grounds are solid, I set them up myself...

I've got some spare cable 1/0, today or tmrw I'm gonna set them up so I can have the bat sit (temp) in the engine compartment and see what happens.

_________________
http://www.dtpprecisionrebuilding.com
Back to top
View user's profile Send private message Visit poster's website
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Sat Jan 12, 2013 7:01 pm    Post subject: Reply with quote

Those voltages are definitely the first dimension to address.
You're on the right track. You'll get it. thumbsup

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
af2
Member


Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Mon Jan 14, 2013 7:23 pm    Post subject: Reply with quote

disturbthepeace1 wrote:
Ok this what I got,

Voltage drops to 10.7-.5 while free cranking with ignition disconnectect

Voltage will drop to 6.4-7 when cranking and trying to fire.
..


The MSD hates anything below 10 volts and will fire when ever it has enough to......

The free cranking should be close to the fire cranking to get it lit...

Many people use a switch to hit the ignition while cranking and it works some times but...

The 1/0 cable will be the best thing you can do period if all the grounds are good as you say they are.
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Mon Jan 14, 2013 11:27 pm    Post subject: Reply with quote

does it have a battery disconnect switch ? some of those will drop a crap load of voltage if everything is running through it.
_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
81572.74 points


1971 Chevrolet Chevelle

PostPosted: Tue Jan 15, 2013 5:19 pm    Post subject: Reply with quote

I have a new Nippon starter solenoid if you need one.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Small Block Gen 1 All times are GMT - 5 Hours
Goto page Previous  1, 2, 3  Next
Page 2 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
Home | Contact Us | Automath | Cam Files | Dyno Search | Forum | Garage | Picture Gallery | Reaction Timer

Copyright 1997-2016 SMOKEmUP.com All rights reserved.
Advertising Info     Disclaimer     Privacy Policy