Hello,
I have an 82 Malibu Wagon, I'm 16 and this is my first car. I've only had for about 6 months. The guy I bought it from did a lot of work to it, but couldn't remember a lot of specs for it, so there are things I'm not sure of.
What I do know is this: it has a 350 bored over to about 355 (.030 over I think). High compression pistons (couldn't remember the brand or model) he said they are 11:1, and if I run less than 91 octane I get a lot of knocking so Im thinking the compression is quite high. Stock heads with port matching done, but didn't know the size of the heads. Edelbrock Performer RPM air gap intake with about a 1 inch spacer on top. He thinks it has a Comp cam, but know it was 505, not sure of duration etc or model, but solid lifters not roller or hydraulic. Holley 4bbl carb, I think he said its a 750, double pump mechanical secondaries, choke not hooked up.
When I first got it, he said it was running a bit rich to combat the knocking a bit. It ran and idled good, and did not hesitate when you stepped on it to open the secondaries.
Lately it seems to be running much richer, leaving spray on the driveway when idling. It has also started hesitating when you hit it hard from a stop, or step on it and open the secondaries. It hesitates to a point that it almost completely stalls, but if you let completely off the gas it will come back. Seems like once it gets really warm the hesitation lessens.
I am not good with carbs, they confuse me. Any suggestions on simple adjustments I can make to this to try and solve it? I was also thinking of replacing the carb with an Edelbrock to match the intake. This Holley, even though he said it was rebuilt, looks a bit rough.
Thanks,
Brad.
I have an 82 Malibu Wagon, I'm 16 and this is my first car. I've only had for about 6 months. The guy I bought it from did a lot of work to it, but couldn't remember a lot of specs for it, so there are things I'm not sure of.
What I do know is this: it has a 350 bored over to about 355 (.030 over I think). High compression pistons (couldn't remember the brand or model) he said they are 11:1, and if I run less than 91 octane I get a lot of knocking so Im thinking the compression is quite high. Stock heads with port matching done, but didn't know the size of the heads. Edelbrock Performer RPM air gap intake with about a 1 inch spacer on top. He thinks it has a Comp cam, but know it was 505, not sure of duration etc or model, but solid lifters not roller or hydraulic. Holley 4bbl carb, I think he said its a 750, double pump mechanical secondaries, choke not hooked up.
When I first got it, he said it was running a bit rich to combat the knocking a bit. It ran and idled good, and did not hesitate when you stepped on it to open the secondaries.
Lately it seems to be running much richer, leaving spray on the driveway when idling. It has also started hesitating when you hit it hard from a stop, or step on it and open the secondaries. It hesitates to a point that it almost completely stalls, but if you let completely off the gas it will come back. Seems like once it gets really warm the hesitation lessens.
I am not good with carbs, they confuse me. Any suggestions on simple adjustments I can make to this to try and solve it? I was also thinking of replacing the carb with an Edelbrock to match the intake. This Holley, even though he said it was rebuilt, looks a bit rough.
Thanks,
Brad.