I spent some time with the file, grinder, and drill, last night. I used the file on the seams inside the middle of the pipe. I used a grinder to bevel the leading edges of one of the header pipes at the head-flange end, and the header flange at the a-pipe end. I drilled out the a-pipe header flanges just a bit, to assist in the install. The install will be this weekend.

 

what! modaddict, you only had to grind leading edge of one pipe of six! i spent four hours with rotary file and carborendum points cleaning up and rough polishing leading edges of all six pipes plus collector pipe inner flanges, i must be anal or ? any case all transitions are now relatively clean+smooth and install next weekend

 

Mine were in pretty good shape. Actually, I touched up most of the pipes, but only one out of the six needed quite a bit of help. Only one third, of one of the collector flanges, needed help.

If the opening it was going into was larger, I did not mess with it. I only worked it when there was a ledge on the way in.

 

yep, outflow edges only, here too. hoping for good weather this weekend as install is a "driveway project" . saw the post pics of your stones, what coating process + how would you rate quality of the coating and how much?
frank

 

The coating is from Swain Tech. I had Jet Hot coating my Camaro headers, and it really kept the engine bay temps down. That's really all I'm after. The Twain Tech seams to be pretty durable. The surface has a gritty texture that I didn't expect, but as long as it keeps things cool, that's all that matters to me. Cost was $205 plus shipping.

 

Did you do anything the the flange that bolts to the cat?

 

OK Guys. Now about porting the headers. I looked into the colectors and the A-Pipe. The biggest thing that I found is with the A-Pipe. The end of the A-Pipe looks like it needs to be bored out. The pipe coming to the flange is smaller than the opening of the flange. Now I can go ahead and bore/port it out, but by doing so the seat were the gasket sits in would be disrupted.

Now as for the collectors. Starting from the begining of the headers, where the collectors bolt to the engine block. The mounting plate, the piece of the collectors that bold to the engine, seems as though it was welded slightly off. I can go ahead and grind the collector's pipes to make it look somewhat smooth, but I am deafly affraid that I will grind right through the pipes and break though my coating.

What I am trying to say is how can I go about grinding the headers?







Juker008

 

juker008, i began my grinding touchup prior to initial fit up. first i purchased a high speed hardened rotary grinding bit , 1/4" shank, to fit a vari-speed power drill. i carefully ground the leading pipe edges by removing excess pipe stock (champfer technique) back to the weldment ONLY. no grinding on the inner weldment metal. followed up with rough polish of the ground out areas.
second, where collector pipe met bolting flanges + misaligned , again i removed flange stock ( champfer technique) smoothly beveling the flange inside radius back to meet the abutting collector pipe all without grinding the gasket face surfaces of the flanges or inner weldment metal.

 

The area you're talking about is right where it's welded on the outside, so there is a little more material there. I just tried to bevel the edge of the pipe that created the ledge.

 

Yes, what he said!

 

yep, and following all grinding i used the shop towel /hooked coat hanger pull-thru thing nashua suggested to clean out filling debris, worked fine macguyver! (grin)

 

Very :confussed: . Sry the wording that u used really confussed me.

I've got a basic idea of how to do it. I'm already starting on it and I thinik that I am on the right track. I'm using a Dremel to do the work. I've already gone through a grinding stone bit, to do one of my colectors. If u could show me a couple of pics of how u are going about doing ur job.


Tnx






Juker008

 

well, the finished product is at the storage garage, i'll take pics this weekend and try to post back here in town monday unless too late for your install.
dremel huh, well mine had significant amount of grinding , soooo... rotary file bit and drill was the answer for me. ("confussin you is the nature of my game" rolling stones,m.jagger 1971) grins and........
good grinding, frank

 

by-line, this whole header piping grind thing kind of recalls an earlier thread to mind , some thing about removin 4mm inner diameter metal from stock t/b to increase / maximize air flow (sort of air in- air out and a heap of cammotion in between)
grins , frank

 

Well I'm going to be goning out to Walmart to get more grinding stones to do the job. I'll get it to the best that I can. I've got this devil on my shoulder that keeps jabbing me in the back of the head with a pitch-fork, so I don't know if I'll wait till Monday for the installation. We'll see, if I have any more questions I'll hit u up.



TNX







Juker008