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07-10-2006 11:20 PM #1
Need help,suggestions with my 402 BB??
I think this site went down today and my thread got erased.Anyway I'll repost it.I have a 69 camaro with a Muncie M-20 Trans(bad syncro in 4th Gear)
Forged pistons,Rods and crankshaft.I have stock but Ported oval iron Heads with 2.19 and 1.88 valve's,Torker 2 Manifold,Nitrous System.I have a rather big Cam which Duration at .050 is 248 Intake and 248 On Exhaust,595 Lift on both the Intake and exhaust,110 Lobe separation.Its a very Lopey cam and it is hard to get to Idle.It has a 780 Double Pumper carb which was rebuilt with a 4 corner Idling circuit a while ago(it fixed the constant fouling of my spark plugs)
I got some replies saying to ditch the Cam and Intake especially since this car will probably be used mainly on the street.I had 1 reply saying to get a 750 something??? because it is better for Cars on the street and is more responsive.i didn't get the whole message because the site went dead on me today.I do think the 4:11 Gear I am running now is too much Gear.I think a 3:73 gear would be much better.Is this to much Cam for the street(2500-6500 Power band) and does this Cam make my engine drink alot more gas because of the Cam?? Im charging the battery tonight and I going to see if i can get it Idling faster tommorow.The best way of doing that is running 16 degree's advance at Idle and either turn up the throttle linkage or wait 10 minutes until the Car warms up.I have an Edelbrock performer Manifold but I would have to change my Cam to get the benefits of the lower end torque and power.Im not sure exactly what to do.I certainly want to keep the car fast.Any suggestions would help. Thanks
You're welcome Mike, glad it worked out for you. Roger, it's taken a few years but my inventory of excess parts has shrunk a fair bit from 1 1/2 garage stalls to about an eight by eight space. ...
1968 Plymouth Valiant 1st Gen HEMI