slow 68 cuda help plz
06-20-2007 | 11:21 PM
#1
Guest
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slow 68 cuda help plz
Hi, first of all, excuse me my bad english.
Originally i had a 69 barracuda with 2 barrel factory intake and factory carb, points ignition, 4 speed trans and 3.2 gear on a danna 44, i went to the drag and the 1/4 mile was on 16.3 seconds. Then i change the intake to a Weiand X cellerator and a Carter 600 cfm carb, Crane Hi-6 Ignition, 3.73 gear, i welded the diferential in order to obtain traction from both wheels, i went to the drag again and i get 17.5 seconds!!!...
i have a factory cam, but today i received a new 274 comp cam and im planning to make a dual exahust system, so.. the question is.. why my car get slower than before?, what can i do in order to be faster.
Thanks for your atenttion
Originally i had a 69 barracuda with 2 barrel factory intake and factory carb, points ignition, 4 speed trans and 3.2 gear on a danna 44, i went to the drag and the 1/4 mile was on 16.3 seconds. Then i change the intake to a Weiand X cellerator and a Carter 600 cfm carb, Crane Hi-6 Ignition, 3.73 gear, i welded the diferential in order to obtain traction from both wheels, i went to the drag again and i get 17.5 seconds!!!...
i have a factory cam, but today i received a new 274 comp cam and im planning to make a dual exahust system, so.. the question is.. why my car get slower than before?, what can i do in order to be faster.
Thanks for your atenttion
10-10-2007 | 05:51 PM
#2
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Posts: n/a
whats the block size ? could that 600cfm carb be too mutch fuel for a small v8?
then you weilded the spider gears/ i would have chose a mini spool. the weild could be causing too mutch drag along with weilding spiders your more prone to lose traction off the line altho with too mutch fuel you cant fully put to use the new intake (i also aske one of my buddies certified master mechanic he says get a o2 sensor with a fuel /air ratio guage to moniter your ratios for too mutch fuel) i think the 600 is too big a 500 or eaven a 550 cfm would be fine if one of your buddies has one try to borrow it see how she runs
good luck
then you weilded the spider gears/ i would have chose a mini spool. the weild could be causing too mutch drag along with weilding spiders your more prone to lose traction off the line altho with too mutch fuel you cant fully put to use the new intake (i also aske one of my buddies certified master mechanic he says get a o2 sensor with a fuel /air ratio guage to moniter your ratios for too mutch fuel) i think the 600 is too big a 500 or eaven a 550 cfm would be fine if one of your buddies has one try to borrow it see how she runs
good luck
12-13-2008 | 06:13 AM
#6
Admin
Joined: Apr 2008
Posts: 8,173
Likes: 200
From: Goffstown, NH
well now wait...... I don't think that a 600 is too big for a small block. I have put an edelbrock 600 on an amc 360 motor with just an intake and it runs fine.
First off, the gearing is way to high. You need to go back to the 3.23 gears and install a mini spool unless you are a really good welder. The only reason why I say this it because the welds on teh spider gears can crack and break if they do not penatrate competely.
Secondly, When you pull the motor to do the cam, change out the clutch for a high performance clutch. The one that you have now may be slipping too much. You'll need one that has more holding power.
Third, You need to tune the carb properly other wise it will sound like its running right but it may be dumping in too little gas.
First off, the gearing is way to high. You need to go back to the 3.23 gears and install a mini spool unless you are a really good welder. The only reason why I say this it because the welds on teh spider gears can crack and break if they do not penatrate competely.
Secondly, When you pull the motor to do the cam, change out the clutch for a high performance clutch. The one that you have now may be slipping too much. You'll need one that has more holding power.
Third, You need to tune the carb properly other wise it will sound like its running right but it may be dumping in too little gas.
12-14-2008 | 05:20 PM
#7
Mopar Lover
Joined: Jul 2008
Posts: 1,682
Likes: 28
From: MICHIGAN
I dont think Rulito is here anymore as this post is over a year old but its a good thread but as 78 says the 600 is just about right on a small stock motor , my 72 340 stock had the 750 thermo on it and it was fine never had any problems , im also leaning towards him welding his rear together as one might get to much drag from it that way//// also maybe didn't do it right at the line 
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