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Wont pull hard on top #85331
07/07/08 02:24 PM
07/07/08 02:24 PM
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
J
Joshs68 Offline OP
pro stock
Joshs68  Offline OP
pro stock
J

Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
I had the car out the other day and it didnt pull like normal up top. I had set the carb a few months ago when it wasnt this hot or humid. It ran fine and pulled hard from the lower rpm range but when it got around 5800 or so it tapered off and wasnt revving as fast and it felt like the power was falling off. It was still pulling but this car usually pulls very hard in the upper rpm's. I usually shift around 62/6300 and its still pulling.
I havent checked anything yet and havent had time to drive it either.
anything come to mind ?

Re: Wont pull hard on top [Re: Joshs68] #85332
07/07/08 02:31 PM
07/07/08 02:31 PM
Joined: Oct 2007
Posts: 936
own private Idaho
N
ngpSatellite Offline
super stock
ngpSatellite  Offline
super stock
N

Joined: Oct 2007
Posts: 936
own private Idaho
what do you have under the hood?????

Re: Wont pull hard on top [Re: ngpSatellite] #85333
07/07/08 03:56 PM
07/07/08 03:56 PM
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
J
Joshs68 Offline OP
pro stock
Joshs68  Offline OP
pro stock
J

Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
470" b engine. mopar performance 383/440 aluminum heads .590 cam M1 4500 flange with a 1050 2" tti's 10.5/1 34deg timing no vac adv. chrome box four speed

I am thinking it may be either an ignition problem or the carb, maybe it was just because it was real hot and humid and I havent reset the mixture screws on the carb since this spring?
This carb (1050 model 8082) has never been great, but has always worked o.k.

Re: Wont pull hard on top [Re: Joshs68] #85334
07/07/08 05:02 PM
07/07/08 05:02 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
not enough advance. try 38*

Re: Wont pull hard on top [Re: Mr.Yuck] #85335
07/07/08 09:17 PM
07/07/08 09:17 PM
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
J
Joshs68 Offline OP
pro stock
Joshs68  Offline OP
pro stock
J

Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
it was working fine the way it was set, I will add a little timing to it.
I think my fuel pump setup may be the problem.
I am going to make a change in that area when I pull the rear out for some new gears.

Re: Wont pull hard on top [Re: Joshs68] #85336
07/07/08 11:22 PM
07/07/08 11:22 PM
Joined: Jul 2004
Posts: 4,732
Watertown, WI
MikeyT Offline
master
MikeyT  Offline
master

Joined: Jul 2004
Posts: 4,732
Watertown, WI
Your not getting valve float are you?
Mike


1969 Dodge Dart Swinger
Re: Wont pull hard on top [Re: MikeyT] #85337
07/10/08 04:51 PM
07/10/08 04:51 PM
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
J
Joshs68 Offline OP
pro stock
Joshs68  Offline OP
pro stock
J

Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
I dont think so but I dont know, how do you tell. everything sounds fine and I never did before. I had my springs checked by a machinist when I had all the engine work done. I have recently checked all the lash and its all in spec and the same as assembled .024/.028 cold.

Re: Wont pull hard on top [Re: Joshs68] #85338
07/11/08 01:44 PM
07/11/08 01:44 PM
Joined: Jan 2003
Posts: 8,128
New Mexico
UCUDANT Offline
Troll Hunter
UCUDANT  Offline
Troll Hunter

Joined: Jan 2003
Posts: 8,128
New Mexico

As stated 34 degrees (max for a small block) is a tad low for a big block.

Did you check the plugs after you took it for a blast

Do you have a choke and is it opening?

Are you not getting enough fuel at higher RPM for some reason. Fuel filter restriction etc

You mentioned it was not as hot when you tuned it. The colder the air the denser the air charge charge, as you start to lean out you can make more power.







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