increase 60 foot times

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68 barracuda 68

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Hello
Was recently at race with my Barracuda, 60 foot is bad about 1,65 and best 7,23 1/8
Hooks good and no tire slip, the converter is now being changed from 9,5 street converter with 3000 stall, the new will be 8race converter with 5000 stall, hopefully better 60 foot.. if i should get the 60 foot to 1,5 or somthing how mutch faster is it on 1/8 ?
 
usually if you pick up a tenth in the 60 it would equate to two tenths on the 1/4 mile, sometimes more. going from a 10" converter to an 8" is big difference. Street to full race. good luck you should be very happy with the change.
 
usually if you pick up a tenth in the 60 it would equate to two tenths on the 1/4 mile, sometimes more. going from a 10" converter to an 8" is big difference. Street to full race. good luck you should be very happy with the change.
thanks, the index im running is 7,00 so hoping the converter change will make the differnse i need..
 
If you get into the 1.5's it should do a 7.0x....but it does depend on the whole combo, granted, I have never seen a can run slower with an 8" converter over a 3000k converter. You are at close to optimal 60' for the 7.23 ET.

What was your MPH of the 7.23 run?
 
What are you running for shocks and springs?
The speed was 93,20 , qa1 front and front adjustable suspension, back is super stock bearing? And suspension. Sorry for my english, im from norway. Engine is 408 w2 heads ported with 950 carb, 10,5 comp, and solid roller race cam. Ignition is 36 total also going to try less timing, tried 38 but no good on my set ut, hopefully the new converter will do what i need to get 7,00, 6,99 is total breakout, all steel car, have racing plastic seats. I shift about 6500rpm, feels like the best shiftpoint
 
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Agreed, 950 is about perfect for a 408.

Without know the specifics of the motor and chassis combo, it does seem to be down on power from what was listed (408, ported W2's, 10.5:1, solid roller, 950 carb). I would think it should be closer to 98-100mph in the 1/8.
 
I just built a near identical engine and ordered a custom Pro Systems Venom carb... It is in the 900+ Range. CFMs will vary depending on various stuff..
 
Agreed, 950 is about perfect for a 408.

Without know the specifics of the motor and chassis combo, it does seem to be down on power from what was listed (408, ported W2's, 10.5:1, solid roller, 950 carb). I would think it should be closer to 98-100mph in the 1/8.
Think the problem is the converter and maybe timing, rpm range on cam is 4300-7400, starting on 3000rpm would be wrong to the engine..
 
I know this is a lot to ask........do you have any video of the car launching at the start? Is body rise smooth or does it "hop"?
 
which W2s ? Open or closed chambers ? Do you have flow #s ?
if they are closed chambered 34 total would be about right.
Do you have a wideband on it ? Is the jetting spot on ?
 
which W2s ? Open or closed chambers ? Do you have flow #s ?
if they are closed chambered 34 total would be about right.
Do you have a wideband on it ? Is the jetting spot on ?
its closed chamber, yes have wideband and 12,2 on wot, did not have time to try more one timing last time, next race i 7/6 with new converter and will also try with 34 on ignition timing. i dont have the flow on the W2, but cause it seems likeit dosent like more than 6,500rpm, so dosent breathe enough. Anyway im close to the goal on my ET an almost happy With it
 
Cool, if it hits your goal then its all good. I hope your new converter does the trick :thumbsup:
 
Carb tuning is a big factor in 60' times as well. Accellerator pump cams & squirters for 60'. Jet for MPH. Try to get both squirts (Holley double pumper) to finish at the same time and don't have it last any longer than necessary, otherwise you get a rich spot after the main circuit starts up. Lots of trial & error.

For reference, I had my 3,550+lb 360 Dart pulling 1.52 60' times while running 7.18 @ 93 MPH in the 1/8 this past weekend in the heat. It could be a bit better with more work, but it's consistent and I hate to mess with it.
 
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IMO something is off somewhere or the car is very, very heavy. The converter will help. I ran a 9 1/2" behind my Edelbrock (ported, mid 290's) flat hydraulic cammed 340, 4.30 gears. At 3240# it ran 7.24 at 94 mph with 1.54 60'.

I built a 408 using the heads off the 340 and had the converter configured for the combo. It was 10.8-1, 260/264 @ .050 flat solid, 4.10 gears. At 3260# it ran 6.57 at 104 with a best 1.38 60'. After about two years I killed the 9 1/2" converter and had an 8" built for the 408 and never got near the best 60'. Generally high 1.40's.
 
IMO something is off somewhere or the car is very, very heavy. The converter will help. I ran a 9 1/2" behind my Edelbrock (ported, mid 290's) flat hydraulic cammed 340, 4.30 gears. At 3240# it ran 7.24 at 94 mph with 1.54 60'.

I built a 408 using the heads off the 340 and had the converter configured for the combo. It was 10.8-1, 260/264 @ .050 flat solid, 4.10 gears. At 3260# it ran 6.57 at 104 with a best 1.38 60'. After about two years I killed the 9 1/2" converter and had an 8" built for the 408 and never got near the best 60'. Generally high 1.40's.
Hoping the new converter will do it, think that will be good help. The new is 8 and 5000rpm in stall built for that combo i have, will also try 34 on timing. Thanks for help guys. Will update after next race 8-9/6. Carburator have non vakumpump on secondary. Running 98 pumpgas and have 82-92 jetting, 12,2 wot
 
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