Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic -- 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> 510 BBC Left Bank not firing
User Name
lost password?   |   register now

Thread: 510 BBC Left Bank not firing Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
09-26-2012 12:31 PM
vern0116 Hey no problem I totally understand. Like I said Im not a engine builder and I didn't describe what i was deal with very well, and left out the stroked part.

SO to update I got 6 of 8 cylinders firing ( headers getting hot) and motor running alot more smooth. However i guess #2 wasnt firing as well because after i got 3,5, and 7 going ( after valve adjustment ) #1 and #2 headers are not getting hot.. DiD a compression test and had no compression.. So Im going to readjust those valves again tomorrow..
09-26-2012 10:47 AM
vinniekq2 the 507.7 is just the number from the calculator to confirm that 510/509 is correct. The numbers that manufacturers claimed were rounded numbers,not the new GM 5.7 is not called a 350 anymore as they changed the bore and stroke its now a 346,we still call it a 350.
We all seem to have gotten off to a bad start so I will say sorry for my original posts and change that to welcome to the forum I hope everyone can pitch in and help you.
forgive us as we have had a couple trolls post on the boards and when we see first posts from first timers that are difficult to understand,I wont say we,,,,ai may have jumped to the wrong conclusion,so once again,,,sorry.
09-26-2012 10:04 AM
vern0116 I'm not a engine builder this motor was left to me by my brother I'm just trying to get it running. I'm having issues I've never seen before. And like I said I'm not a pro. That's why I was asking for help
09-26-2012 10:02 AM
vern0116 There was backfiring thru the throttle body on start up only. I set the timing with the timing marks on the balancer and the mag pick up. I'm also getting spark to the #1 cylinder so the timing light worked and I checked timing like that. As best as I could. And I was corrected on my math it's not a 510 it's a 507.7. For all those who would rather say I'm full of it than to ask about singeing I left out of the post
09-26-2012 09:32 AM
Originally Posted by vern0116 View Post
Maybe I didn't explain it enough or the right way. the motor was a 454 it was bored out .60 to a 4.310 bore and has a 4.350 stroke.
Your explanation left a lot out, initially your stated it was bored to 510. We still don't know how you timed it with #1 cylinder not firing.

Also, if the valves were being held open you would have had major backfiring either through the intake or exhaust, depending on which valves.
09-26-2012 09:13 AM
vern0116 Just got cylinders 3,5, and 7 running. Valve lash was messed up keeping valves open not allowing compression to happen. Now #1 and #2 tubes are not getting hot. I'm about to compression test them .....I'm thinking valves again
09-26-2012 07:40 AM
lmsport Have you done a compression test?
Is the FAST setup as a sequential or batch fire?
It doesnt have some kind of reverse rotation marine cam in there does it?
09-26-2012 06:12 AM
vern0116 Ok once again im not seeing the problem here with my post? Im asking for help with a problem im having and getting nothing but NAY sayer responses. Maybe I didn't explain it enough or the right way.
the motor was a 454 it was bored out .60 to a 4.310 bore and has a 4.350 stroke. As for the left bank not firing, thats the problem im having with the motor. I will take video today ( motor running then a inferred thermometer reading of the header tubes) and post it or a link to it. Why would someone make something like this up..
09-25-2012 10:28 PM
68NovaSS You bored this factory 454 block .250", and the motor runs, but not all that well on just the even number cylinders, the right bank, nothing on the left bank firing, yet you have spark and need to be more specific, there's something you're forgetting to tell us.
09-25-2012 06:53 PM
vern0116 i didnt say i wasnt getting spark to the #1 cylinder I said the odd cylinders didnt seem to be lighting off. Header not getting hot and motor running like crap.
09-25-2012 06:51 PM
vern0116 "fall for this " what are you talking about.? It is the problem Im having if you cant help why reply ?
09-25-2012 06:49 PM
vinniekq2 BTW if the left side is cold,how did you set the timing?threads like this should be deleted

bore a 454 to 510? I wonder if anyone will answer,lol. firing order is what? left side doesnt one will fall for this
09-25-2012 06:44 PM
vern0116 Ya... MSD digital 6 plus ignition box, MSD pro billet distributor running off a MSD Flying magnet Crank trigger. Did I not make that clear somehow?
09-25-2012 06:38 PM
vinniekq2 MSD Crank trigger, MSD Digital 6 plus Ing, Pro billet Dizzy?
09-25-2012 04:22 PM
510 BBC Left Bank not firing

I have a freshly rebuilt 454 that was bored out to a 510. MSD Crank trigger, MSD Digital 6 plus Ing, Pro billet Dizzy, and a FAST EZ EFI direct port injection system. SO with that little bit of background here is my problem..

The left 4 cylinders are not or do not seem to be firing.. ????
I can start the motor and after 30 second to a min of rough running I shut the motor off and the left headers are still cold while the right 4 cylinders are hot.
There was fuel dumping out of the left header as well. ( that problem seems to have stopped).

1. I have pulled the 4 plugs and they all have spark.
2. I know these four cylinders are getting fuel ( because it still drains a little out of the headers.
3. I used a Snap On Smoke machine on the motor ..No air leaks however smoke only came out of the left header ... Nothing from the right header.
4. Valve lash set to 0 lash then 1/2 turn more.
5. I have swapped the injector wiring harness from side to side with no change.
6. Timing is set @ 15 degrees @ idle, and firing order is correct.
Any Input or ideas would be greatly appreciated .........

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

All times are GMT -6. The time now is 10:55 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.