E.T. loss ? - Page 2

Mike Taylor 3601 · 11-19-2009, 09:40 AM

When you changed jets did E.T. change? If it didn't pull rockers& intake put air straight (no regulator) to
cylinders check for air leaking through intake valves if can't feel air, spray soapy water look for bubbles.
DON'T WASTE YOUR'RE TIME WITH LEAKDOWN TEST OR COMPRESSION TEST the leak I'm talking about is so small a leakdown or compression test will not show it. I'm not saying this is your problem but I've seen this many times. One almost positive sign of this is jet changes will not make hardly any difference and car will be inconsistent . Have you broke any valvetrain or broke driveline and hit rev limiter hard?
Mike Taylor 3601

Jim Kaekel · 11-19-2009, 12:22 PM

Greg: Something also you might want to check is the balancer, if you are using a stock one. I got tripped up by this many years ago. Outer ring slipped on hub, thereby showing incorrect ignition timing. Very easy to check.

brett3533 · 11-19-2009, 03:14 PM

Greg be sure to check battery and alt you may have a bad cell or shorted battery. Be sure the alt is not stuck on full charge causing power loss have seen regulaters stick, also have you noticed battery needs charged more often. Have you done any welding on car which could have caused diodes in alt to go bad. When you changed jets did plugs get darker or stay white. also check all ground wires ect may have a wire that vibrated loose after put engine in and at track few times. Have you changed fuel system, I have seen a few, fuel cells mounted real high in trunk and lets fuel siphon thru carb while sets in garage and causes rings to loose seal. sorry to keep rambling on but could be anyhting. All posts on here are possibilities.

greg fulk · 11-19-2009, 05:47 PM

Here's the best I can tell you as dad has the log book with him ( logs every pass no matter who is driving). this is a 1bbl carb running holley style jets... with an 82 in it the car ran hott real fast i mean 200 right after a pass ( to lean) with 89 in it the car you could see a trace of smoke coming out of the car as it staged. the 85 seemed the best so that's what was in it last weekend. Now then fuel system has been in the car for 3 years. the cyl head is fresh. the balancer is a maybe as it is stock. Thing is we didn't move the timing...the car right out of the box ran 9.50's now then it's running 9.70's (1/8) the last passes I made with the car were a 9.71 we then changed tires & it went 9.73 I then went up & tried to "flat foot" the car & it went 9.70. i then went up for the "dial n 4 dollars" & it ran a 9.709 on a 9.70 then 1st round it went 9.712...so it's running ok just slow? dad dose think it may be in the rings...don't know but we got rings in for the "good" motor so he's going to put it back together for the spring....that engine will run some 9.30's. THANKS for all the help...we're going to try it again this weekend & see if we can find anything....mean while we changed header this week....so who knows!

greg fulk · 11-21-2009, 08:52 PM

Update! well we figured it out! (i guess) 2nd round about 30' off the line it went BANG!!!!! took the pinion right out of it! guess it's been going out for a few weeks? ya know it's not good when we pushed the car up on the trailer with the shifter in park!

Glenn Hayes · 11-22-2009, 08:38 PM

Glad to hear you found something..... good luck to you.

11-19-2009, 09:40 AM	#11
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,361 Likes: 333 Liked 279 Times in 96 Posts	Re: E.T. loss ? When you changed jets did E.T. change? If it didn't pull rockers& intake put air straight (no regulator) to cylinders check for air leaking through intake valves if can't feel air, spray soapy water look for bubbles. DON'T WASTE YOUR'RE TIME WITH LEAKDOWN TEST OR COMPRESSION TEST the leak I'm talking about is so small a leakdown or compression test will not show it. I'm not saying this is your problem but I've seen this many times. One almost positive sign of this is jet changes will not make hardly any difference and car will be inconsistent . Have you broke any valvetrain or broke driveline and hit rev limiter hard? Mike Taylor 3601

11-19-2009, 12:22 PM	#12
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,226 Likes: 133 Liked 529 Times in 107 Posts	Re: E.T. loss ? Greg: Something also you might want to check is the balancer, if you are using a stock one. I got tripped up by this many years ago. Outer ring slipped on hub, thereby showing incorrect ignition timing. Very easy to check. __________________ Jim Kaekel 3836 STK

11-19-2009, 03:14 PM	#13
brett3533 Member Join Date: Jan 2007 Location: maysville Posts: 117 Likes: 15 Liked 41 Times in 13 Posts	Re: E.T. loss ? Greg be sure to check battery and alt you may have a bad cell or shorted battery. Be sure the alt is not stuck on full charge causing power loss have seen regulaters stick, also have you noticed battery needs charged more often. Have you done any welding on car which could have caused diodes in alt to go bad. When you changed jets did plugs get darker or stay white. also check all ground wires ect may have a wire that vibrated loose after put engine in and at track few times. Have you changed fuel system, I have seen a few, fuel cells mounted real high in trunk and lets fuel siphon thru carb while sets in garage and causes rings to loose seal. sorry to keep rambling on but could be anyhting. All posts on here are possibilities. __________________ Brett McFarland A/S

11-19-2009, 05:47 PM	#14
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: E.T. loss ? Here's the best I can tell you as dad has the log book with him ( logs every pass no matter who is driving). this is a 1bbl carb running holley style jets... with an 82 in it the car ran hott real fast i mean 200 right after a pass ( to lean) with 89 in it the car you could see a trace of smoke coming out of the car as it staged. the 85 seemed the best so that's what was in it last weekend. Now then fuel system has been in the car for 3 years. the cyl head is fresh. the balancer is a maybe as it is stock. Thing is we didn't move the timing...the car right out of the box ran 9.50's now then it's running 9.70's (1/8) the last passes I made with the car were a 9.71 we then changed tires & it went 9.73 I then went up & tried to "flat foot" the car & it went 9.70. i then went up for the "dial n 4 dollars" & it ran a 9.709 on a 9.70 then 1st round it went 9.712...so it's running ok just slow? dad dose think it may be in the rings...don't know but we got rings in for the "good" motor so he's going to put it back together for the spring....that engine will run some 9.30's. THANKS for all the help...we're going to try it again this weekend & see if we can find anything....mean while we changed header this week....so who knows! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

11-21-2009, 08:52 PM	#15
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: E.T. loss ? Update! well we figured it out! (i guess) 2nd round about 30' off the line it went BANG!!!!! took the pinion right out of it! guess it's been going out for a few weeks? ya know it's not good when we pushed the car up on the trailer with the shifter in park! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

11-22-2009, 08:38 PM	#16
Glenn Hayes Member Join Date: Feb 2009 Location: Weeki Wachee, Florida Posts: 348 Likes: 416 Liked 18 Times in 12 Posts	Re: E.T. loss ? Glad to hear you found something..... good luck to you. __________________ "Real Race Cars Have Tailgates"