poor 60ft times HELP!! - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-14-2005, 03:52 PM
bowtienut's Avatar
Member
 
Last photo:
Join Date: Jul 2003
Location: new mexico
Posts: 55
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
poor 60ft times HELP!!

ok this is what i have, a 1971 vega W/a 8.2 rearend from a 1969 camero, 410 gears, 26x10.5x15 mt et streets, engine is a 350 sbc 30 over dome pistons, heads are protopline torker 202/160 iron. comp. is 11.25:1, roller rockers, cam lunati bracket 515 lift 300 dur. intake- performer rpm airgap, carb holley 750 dbl pumper, trans. th350 b/m shift kit, torque conv. b/m 2500 stall.

what it does; on the line i can get to 1800 rpm on the stall, nail it on the light and i got three reation times of 049/051/049, but it stumbles and trys to die. very embarassing!!! 60 ft times are 2.7, after the 60 ft mark the car runs like a scalded dog!!! best 1/4 mile run 13.2 w/ 2.6 60 ft.

please give me some ideas...

thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-14-2005, 04:07 PM
77z's Avatar
77z 77z is offline
Go big or go home
 
Last photo:
Join Date: May 2004
Location: ontario canada
Age: 41
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Whats your fuel pressure like at the line and what pump are you runing? Float levels are fine aswell ?


Regards Mike
__________________
77 Z28 496 9 inch
10.23 @ 129
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-14-2005, 04:30 PM
Bumpstick's Avatar
Hammer and a torch
 
Last photo:
Join Date: May 2003
Location: Southeast TX
Age: 54
Posts: 1,258
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I`m thinking float levels too... Hard launch and a quick short bog means the front bowl is set to high... Try setting the fuel level in the front bowl to the very bottom of the sight (hole or window...?) and the rear should be rasied just a little (somewhere around the middle...?)
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-14-2005, 10:26 PM
Too Damn Slow
 
Last photo:
Join Date: Mar 2005
Location: Appleton,WI
Age: 38
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I had the same problem. You need ALOT more stall. I'd say 3500 at least.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-14-2005, 11:30 PM
black66's Avatar
www.airriderz.com
 
Join Date: Apr 2003
Location: West Coast
Age: 44
Posts: 452
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I agree

I agree with Slow Ride. Your stall is one of your problems....3200 and up would be better.... I am running a 3200 custom built stall with a 355 sbc. 11.2 compression with a .600 lift roller cam. My launch is excellent with no tire spin at all.... I had a B&M stall rated at 3200 - 3500. My motor pushed it above B&M's range to a 3800 stall. 3800 is straight tire shredding in my car.... Spend the extra cash and have a stall built custom for your application..... You will not be disappointed...

Last edited by black66; 07-15-2005 at 12:05 AM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-14-2005, 11:35 PM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 34
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
i'm on board with the stall converter, the more stall you have, provided you hook up, the more consistent you're going to be. 3500 or 4000 would be fine on slicks. Furthermore, floats and pumpshot are probably an issue. How fast is your timing coming in?

K
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-15-2005, 01:21 AM
Member
 
Join Date: Oct 2003
Location: CA
Age: 29
Posts: 71
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sounds like your car is Hooking up and bogging the engine down from the Tires almost, but at the same time It also sounds like you're getting too much Fuel and or not enough spark to burn it all. Check the Advance Curve on the Distributor and the Carb, The carb alone seems a little Much for a 350 (355) SBC, What kind of Distributor do you have and Whats the Timing At? Do you have Advance Curve Kit installed?

Carb Adjusted Correctly?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-15-2005, 06:27 AM
edge's Avatar
Time is short, are you ready?
 
Last photo:
Join Date: Jun 2004
Location: South Carolina
Age: 45
Posts: 658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
More stall wouldn't hurt. But with a 4.10 gear, 26" tall tire and a 2500 stall (currently) and that engine/car combo; the stall alone would not produce such poor 60' times.

I would start with suggestions made regarding tuning the carb and spark curve, then consider another stall. If it is hooking up, you should be able to knock off at least a second on your 60' times. I have a Camaro that weighs 3640# with me in it. With a 4.10 gear and 28" tall tire I can get 1.7xs pretty consistently. Fix that 60' problem and you should be deep into the 12's (IMO).

Best of luck, Ed www.edgesz28.com
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-15-2005, 06:38 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
60'

The stall of the converter will not make your car stumble.....

I ran a stcok converter with about the same cam and had no problems with a stumble ( the 60' times were not great but no stumble)

What is you timing curve, Initial,total, and where is it all in by????

Does it fall flat and then pick up???? or does it react and then fall off?????

Have you done anything to correct it yet????

keith
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-15-2005, 08:11 AM
my alter ego
 
Last photo:
Join Date: May 2005
Location: little kansas
Posts: 100
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The carb is slightly large(probably out of adjustment slightly) and the stall slightly low.... but if you are only stalling to 1800 on the brake then bogs as soon as you accel it sounds like the brakes are not holding the car.

That is believe it or not where I'd look (if you can't tune it out). I'd be trying to get the brakes to hold the car so the throttle can be pressed much farther down (if not all the way to the floor) while you are at the tree.

am i correct that the brakes are not holding the car?
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-15-2005, 09:52 AM
bowtienut's Avatar
Member
 
Last photo:
Join Date: Jul 2003
Location: new mexico
Posts: 55
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
WOW, a lot of ideas thanks guy's, the ignition is a MSD 6al 7000 chip iam shifting at 6500, the timeing... all right don't laugh at me i'm not real savy when it comes to timing, msd distributor, out of the box, no adjustments, set timing at 8 degrees at low idle w/ vac. line off and pluged. Oh, msd wires also.

holley carb, i set the float levels at the bottom of the site hole, i had a 600 edelbrock on the car at one time, but it would run out of fuel before the engine hit 5000 rpm, i am running a holley red pump for fuel.

electric water pump and fan, no belts on the engine, yes hot battery always.

i am sooo disappointed this car is not doing better than it is, i really thought i was gonna have a rocket!

thanks for all the help guy's
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-15-2005, 11:18 AM
edge's Avatar
Time is short, are you ready?
 
Last photo:
Join Date: Jun 2004
Location: South Carolina
Age: 45
Posts: 658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by bowtienut
.. msd distributor, out of the box, no adjustments, set timing at 8 degrees at low idle w/ vac. line off and pluged.
Make sure you have 34*- 36* advance at WOT, no vacuum connected. MSD out of the box, you should have your initial timing set at like 13*-15*. For MSD states their distributors come with 21* of mechanical built in (blue bushings)

What model distributor do you have? Here are the instructions for the Ready-to-Run #8360. They are very good and detailed. http://www.msdignition.com/pdf/8360_frm%2023793.pdf

From the factory, MSD distributors use the two heavy springs (silver) which is a slow rate of advance. With the blue bushings and two heavy silver springs, you do not get full advance until like 4000 RPM (Chart A).

I'll bet if you set your initial timing to 13*-15* (for 34*-36* total at WOT), and use maybe the two blue (light) springs, you will see a world of difference. The two blue (light)springs with the blue bushings will bring in all your advance by like 3000 RPM (Chart D). You may even want to try one silver (light) spring and one blue (light) spring. Chart E says that you'll have full advance at like 2500 RPM.

Ed

Last edited by edge; 07-15-2005 at 11:35 AM. Reason: Read the instructions and learned I had made an error in what I said.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-15-2005, 11:40 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
stumble

Ed got it,,

Go to school right now and learn about timing your engine correct, buy a good light and ask questions.

I bet 95 percent of your issues go away with the correct timng curve, unless the carb is out to lunch... But start with the timing first..

Keith
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-16-2005, 02:11 AM
77z's Avatar
77z 77z is offline
Go big or go home
 
Last photo:
Join Date: May 2004
Location: ontario canada
Age: 41
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Go Ed you saved me a bunch of typing

Regards Mike
__________________
77 Z28 496 9 inch
10.23 @ 129
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-16-2005, 04:57 AM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
no one here asked you what trans you are running.is it an auto?if so you may want to check out some articles at chevy high performance and super chevy on line about the governor kit for the th-350 and 400.you need a converter to match your cam.call your cam company for that info then get hold of a converter company.i match my cam,converter and used the governor kit and what a difference it makes.the governor kit allows you to leave it in drive and make the same run time after time as long as you get it adjusted right.you need to go to holley.com and get some help in tuning or the stumble also.good luck
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
extended cranking times g.b. Engine 8 06-19-2005 10:14 AM
Contra Costa Times article on Mustang meanroy Hotrodders' Lounge 17 06-30-2004 01:18 PM
Your best 1/4 mile times? Meka Hotrodders' Lounge 15 03-26-2004 08:43 PM
How many times can a flywheel be turned? shockers69 Engine 2 12-13-2003 10:35 AM
Posting Times dollybud Hotrodders Site Suggestions and Help 5 03-02-2003 04:40 PM


All times are GMT -6. The time now is 02:22 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.