disapointing night for the 305
#1
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
disapointing night for the 305
so i went to the track last night hoping for a 12.5 pass, but the best i could get was a 13.4, the last time i went it ran a 12.7 at 107 and it wasnt running all that good at that time and since then ive rebuilt the carb, switched from a weiand dual plane manifold so a single plane weiand, and put in a msd pro billet distributor. the car was leaving really hard at first then falling on its face, it was lifting the front tires about 6 inches then bogging down the best 60ft of the night was a 1.897 where the 12,7 pass was a low 1.7 i belive but i dont have the old slips in front of me. any ideas why i would have lost 7 tenths and almost 6mph
i should have some videos of it soon my sister is suposed to be emailing them to me sometime today
i should have some videos of it soon my sister is suposed to be emailing them to me sometime today
#2
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Joined: Feb 2003
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From: Weedsport, NY
Car: 1986 Camaro SC
Engine: Bolt-on/cam 305
Transmission: 700R4 w/ 2500stall
Axle/Gears: 3.73 10bolt Posi
Re: disapointing night for the 305
so i went to the track last night hoping for a 12.5 pass, but the best i could get was a 13.4, the last time i went it ran a 12.7 at 107 and it wasnt running all that good at that time and since then ive rebuilt the carb, switched from a weiand dual plane manifold so a single plane weiand, and put in a msd pro billet distributor. the car was leaving really hard at first then falling on its face, it was lifting the front tires about 6 inches then bogging down the best 60ft of the night was a 1.897 where the 12,7 pass was a low 1.7 i belive but i dont have the old slips in front of me. any ideas why i would have lost 7 tenths and almost 6mph
i should have some videos of it soon my sister is suposed to be emailing them to me sometime today
i should have some videos of it soon my sister is suposed to be emailing them to me sometime today
#3
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Joined: Aug 2005
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
Re: disapointing night for the 305
im not to sure about where the timing is cause i think the balencer spun, the timing light was telling me i had 30 degrees of base timing and over 60 full advance, so i brought it up to 4,000 rpm and tried to set it be ear. my air fuel guage just came in today so im about to put that in and see where i stand with that, im hoping its way off cause it didnt seem to pull on the big end like it use to so im thinking its going lean up top, but ive never had it bog so bad off the line, by the way im launching it at 6200
and 2 of my 60fts were 1.9s 1 was a 2.074, all three of those it dead hooked and ran a 13.7, and on my last pass i barley did a burnout so it would spin a little out of the hole and thats when i cut the 1.897 60ft
and 2 of my 60fts were 1.9s 1 was a 2.074, all three of those it dead hooked and ran a 13.7, and on my last pass i barley did a burnout so it would spin a little out of the hole and thats when i cut the 1.897 60ft
#4
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iTrader: (4)
Joined: Feb 2003
Posts: 872
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From: Weedsport, NY
Car: 1986 Camaro SC
Engine: Bolt-on/cam 305
Transmission: 700R4 w/ 2500stall
Axle/Gears: 3.73 10bolt Posi
Re: disapointing night for the 305
im not to sure about where the timing is cause i think the balencer spun, the timing light was telling me i had 30 degrees of base timing and over 60 full advance, so i brought it up to 4,000 rpm and tried to set it be ear. my air fuel guage just came in today so im about to put that in and see where i stand with that, im hoping its way off cause it didnt seem to pull on the big end like it use to so im thinking its going lean up top, but ive never had it bog so bad off the line, by the way im launching it at 6200
and 2 of my 60fts were 1.9s 1 was a 2.074, all three of those it dead hooked and ran a 13.7, and on my last pass i barley did a burnout so it would spin a little out of the hole and thats when i cut the 1.897 60ft
and 2 of my 60fts were 1.9s 1 was a 2.074, all three of those it dead hooked and ran a 13.7, and on my last pass i barley did a burnout so it would spin a little out of the hole and thats when i cut the 1.897 60ft
I remember when I finished my carb/ignition swap from the CCC-Qjet and distributor to the vacuum advance distributor and Edelbrock carb, I set the base timing, but accidently bumped it back when tightening down the distributor. I took the car for a ride and it was just DEAD everywhere. I went through everything on the carb, I thought the secondaries weren't opening, then I thought it was super lean, checked for fuel starvation. Came to the end of all that and figured I'd throw the timing light on just to be sure. 1* of advance on a Summit HEI that only have 16* mechanical. There was my problem. Dialed up 14* initial, checked it again after getting it tightend down and holy hell my little 305 woke up right up.
I'd get the timing right, for sure, then I'd worry about other stuff if it still doesn't run like it should.
#5
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
Re: disapointing night for the 305
yea thats kindda what i was thinking, i just found my old balencer at my parents house so im going to compare where the mark on the balencer is to the key way to my old one.
i dont think you mis understood it was leaving hard for the first couple feet then falling down, and i tried launching everywhere from 3500 for 6200
i dont think you mis understood it was leaving hard for the first couple feet then falling down, and i tried launching everywhere from 3500 for 6200
#6
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You've got to know the timing is right before you can expect decent performance.
Single plane intakes are not very forgiving. I thought 3500 stall and 6800 upper end powerband cam would work well with a single plane, it cost me a tenth in 60', even though it didn't bog.
Single plane intakes are not very forgiving. I thought 3500 stall and 6800 upper end powerband cam would work well with a single plane, it cost me a tenth in 60', even though it didn't bog.
#7
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iTrader: (4)
Joined: Feb 2003
Posts: 872
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From: Weedsport, NY
Car: 1986 Camaro SC
Engine: Bolt-on/cam 305
Transmission: 700R4 w/ 2500stall
Axle/Gears: 3.73 10bolt Posi
Re: disapointing night for the 305
yea thats kindda what i was thinking, i just found my old balencer at my parents house so im going to compare where the mark on the balencer is to the key way to my old one.
i dont think you mis understood it was leaving hard for the first couple feet then falling down, and i tried launching everywhere from 3500 for 6200
i dont think you mis understood it was leaving hard for the first couple feet then falling down, and i tried launching everywhere from 3500 for 6200
five7kid is pretty on the money as well, the cam your running isn't tiny by any means, but might not be exactly single plane material. I say get the timing worked out, and try it again on the single plane. If it still can't knock down close to your original time, you'll find your way back to the dual plane.
Let us know how it works out - always like to see 305's going fast! I'm thinking the Vortec .525 lift heads and Performer RPM Airgap from Scoggin Dickey's for me this year, with a similar cam, probably the XE268. Any more than that and I'm gonna really feel the need for more converter. But I am curious, how does that xr274hr work for you? Whats the idle like, and where does the power start, and fall off?
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#8
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
Re: disapointing night for the 305
well the balencer didnt spin, i check the timing and it was 32 base and 65 full advance i brought it down to 15 base and 45 full advance and it backfire through the carb when given throttle off idle, is there any other reason the timing would need to be so high, im going back to a dual plane tonite and hopefully going back to the track tomorow
#9
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iTrader: (4)
Joined: Feb 2003
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From: Weedsport, NY
Car: 1986 Camaro SC
Engine: Bolt-on/cam 305
Transmission: 700R4 w/ 2500stall
Axle/Gears: 3.73 10bolt Posi
Re: disapointing night for the 305
well the balencer didnt spin, i check the timing and it was 32 base and 65 full advance i brought it down to 15 base and 45 full advance and it backfire through the carb when given throttle off idle, is there any other reason the timing would need to be so high, im going back to a dual plane tonite and hopefully going back to the track tomorow
Last edited by atc3434; 10-16-2008 at 04:57 PM.
#10
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Joined: Sep 2005
Posts: 622
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From: Rochester, NY
Car: '82 Sport Coupe/'89 bird/'77 280z
Engine: 355/2.8/L28E(t)
Transmission: TH350/T5/4 spd
Axle/Gears: 3.73/3.42/3.54
Re: disapointing night for the 305
well the balencer didnt spin, i check the timing and it was 32 base and 65 full advance i brought it down to 15 base and 45 full advance and it backfire through the carb when given throttle off idle, is there any other reason the timing would need to be so high, im going back to a dual plane tonite and hopefully going back to the track tomorow
#11
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iTrader: (5)
Joined: Aug 2005
Posts: 293
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
Re: disapointing night for the 305
its a mechanical advance distributor, what would be a good base timing, how do i check it manually, also could it be something stupid like the dizzy a tooth off or all the wires on the cap one spot over, i say that cause when i had it out the other day i marked all the wires but forgot to mark number one on the cap so i guessed and it did fire up after moving the dizzy around some
#12
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Joined: Mar 2000
Posts: 43,169
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Hook the timing light up to the #1 or #6 spark plug wire. You have to get the right wire, you can't just pick any of them.
Having the distributor off one tooth won't affect anything - just move the distributor housing until you get the proper timing.
So, your distributor has mechanical advance only, and no vacuum advance?
Having the distributor off one tooth won't affect anything - just move the distributor housing until you get the proper timing.
So, your distributor has mechanical advance only, and no vacuum advance?
#13
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Joined: Aug 2005
Posts: 293
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
Re: disapointing night for the 305
yea its a msd pro billet 8551 is the part number i belive, i just set it with a light 10 base 36 full advance and it seems to be running good,i also just got finished putting my air fuel guage in and its in the rich area at all rpms, how do i lean it out at idle, i have a 6.5 powervalve and 13 inches of vacuum should i go leaner in the primary side
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