HEI conversion in a points truck

[VileZambonie]

""If worse comes to worse run a wire from the R terminal and connect it to the wire you have going to the coil now. That will energize your coil during cranking if you can't figure it out.""

Vile, if he runs a wire from the switched start circuit on the starter, to the same ignition wire from th switch to the coil, then won't his starter stay engauged when he turns on the key. May need to install a heavy duty diode. In short, there has to be something wrong with the ignition switch. If he has power, then it goes away when cranking, the switch seems to be the most likely culprit, right??

It seems he figured out it was a bad ignition switch. The R terminal on the starter is only energized during cranking. It was originally used for this purpose to deliver full 12volts to the coil during cranking. It gets energized by the solenoid from the B+ terminal on the starter. It will not keep the starter energized, that's what the S terminal does.

[77c15]

Hijacking my own thread...but first: I did conclude that the switch was bad, because there shouldn't be a 12v drop to 0v at the IGN source on the fuseblock.

Okay: Anyone have Flowmaster single chambers on their truck with true dual exhaust? I'm taking my truck to the exhaust shop tomorrow and i'm going to have them put between 2 and 3 feet of pipe between the headers and mufflers, then the flowmasters with turndowns on them (right under the seat!). Are they annoyingly loud and obnoxious? I had a shop put them on my brothers IROC, but they were the only thing that would fit under his F-body with true duals from the headers to the side exit exhaust (almost like side pipes). His car is loud, but not obnoxious. It's a pleasant tone. I'd rather hear the music of the motor than the junk on the local radio stations anyway!

[VileZambonie]

Your truck is going to be obnoxious and you are going to drone yourself out of the cab. BTW you don't need an exhaust shop to do that, it's not even an exhaust sytem  My advice is install a 2 or 3 chamber flowmaster b4 the axle, bring the pipes up toward the bed and turn out behind the rear axle. Sounds awesome inside and outside plus it looks the best that way.

[VileZambonie]

Also, an H pipe is easy enough to do too without any obstruction

[choptop]

The H pipe is highly advised. It helps performance and in my own 2 cent opinion it gives a better,more mellow tone that these trucks are noted for. I've got 2 chambers onmy wifes 3/4 ton with a bigblock and it sounds great. I've run other mufflers in the past, but they don't have the same sound. I have flows on everything. I am putting singles on my choptop, but it won't be daily driven, no stereo, and I want obnoxious.

By the way Vile, Thanks for the info on the s and r terminals, it has been a while since I have messed with the points stlye trucks and forgot.

[Captkaos]

You will hate the exhaust within a week if you dump it under the cab...

[choptop]

The exhaust is dumped under my extended cab, and you are RIGHT, i DO HATE IT. Next stop, exhaust all the way out the end.

[werewolfx13]

Single chambers (i assume you're talking about the race 10 series) are no louder than blown out glasspacks, and thats the most common sound I hear on these trucks..dumped before the rear axle. I kinda like it, but I don't like the extra attention you get from being THAT loud..especially with certain neighborhoods having noise restrictions.

[choptop]

I am looking at the single chamber Flowmaster for my choptop because it is so small. I willl be running a 496, routing the exhaust through the frame, and the muffler will be under the cab where the fuel tanks were, the the exhaust will exit under the step on the bed. I have alot of mos to do it I think it will work. This truck will lay on the ground when done, so I need all the clearance I can get

[77c15]

Just had the exhaust done today...it exits right in front of the rear axle with turndowns right after the mufflers (flowmaster 40 series) and at idle the cab vibrates! Here are some pix of the job:

[77c15]

That last picture is the entire reason I trust this guy working on my truck...he even talked me into dumping the mufflers and turn downs right in front of the axle...his truck was sweet! He sold that bad boy for 10 grand without the blown 427!!!