Porting suggestions/pics for 3x00 heads

[ikessky]

The dremel was much better for me because there wasn't a bulky trigger that I had to hold down. With the dremel, I just set the rpm and went to work.

I just use an air regulator to drop the RPM of the die grinder. That way, I can just hold the trigger all the way down rather than trying to feather it.

[Superdave]

1 5/8" worked perfect.. although beating the ends into a D shape wasn't the most fun i've ever had.. that's why i used round ports on the last set i built.

[ForcedFirebird]

1 5/8" worked perfect.. although beating the ends into a D shape wasn't the most fun i've ever had.. that's why i used round ports on the last set i built.

Sounds like when I beat a 2.5" pipe to fit my t3 turbo flange. I tacked it, beat it, tacked it, beat it etc etc. Came out nice, though.

Look at the shiney ...






3400-95-modified thanks for the flapper suggestion! I used 80, 120, then a cotton buffing wheel. Probably can skip the 80 on the rest because the stone does a nice job.

I also think I am going to try and use a dowel, dill a hole in the end, and glue a Dremmel bit in it, so I can put in a drill and get the entire runner length as nice as I can.

[ForcedFirebird]

Had a few minutes today after moving 2 apartments of furniture for family members. I'm satisfied with the job so far...

[whitelightnin04MC]

I just use an air regulator to drop the RPM of the die grinder. That way, I can just hold the trigger all the way down rather than trying to feather it.

I didn't need to drop the RPM. My problem was that, with the big bulky trigger, you still had to hold it down all the time and that kind of limited how I could hold the grinder. With the dremel, I just set the speed switch and went to town.

[ForcedFirebird]

Completely finished the first runner, how do you like?







The dowel worked great. Drilled a hole in the end of it and stuck a spherical stone in there. Then cut a slot in the end and wrapped a strip of sand paper to make a paper drum/flapper, then cotton buffed it.

[IsaacHayes]

Sure is shiny! I can see a casting seam though still in the runner! hehe.

[3400-95-Modified]

smoother than mine... Then again I'm not planning on boosting

[ForcedFirebird]

Issac: Fangu! I was going to smooth the casting marks too, but the block will be here Thursday and I'm trying to make the Southern V6 Clash in March (N/A). I think they will be just fine .

Modified: I will be N/A and posing dyno results before returning the boost. 11:1 compression is a little much for a turbo, so until I get the 3400 pistons I'm working on, this will be all motor.

[SappySE107]

I wouldn't polish it leading from the lower to the head.

[ForcedFirebird]

I wouldn't polish it leading from the lower to the head.

Nope, as I stated earlier I will polish it to the injectors.

80 grit rough enough after?

[SappySE107]

I use 120 so yeah, 80 is perfectly fine.

[ForcedFirebird]

I use 120 so yeah, 80 is perfectly fine.

Actually I was using 120 to finish the runners, then buffing them with a cotton buffer and red compound to get the mirror finish. Perfect, I'll just leave them at 120. I thought 120 would be a little too smooth to prevent fuel coagulation.

[IsaacHayes]

Yeah you'll be fine. I wouldn't worry about the casting seam too much. In my 97 3400 plenum it was visible but didn't stick out or feel like a bump to the touch so I left it alone. The 94 3100 casting was waaay rougher with irregular square notches on the top round ports (???) and the cast was super rough. The 97 3400 was very smooth inside, no rough sand feel at all.

[zofo61]

Please post pics as soon as you have made some progess....I am interested in doing a set of 3500 heads for boost as well.............