Head Porting and what is needed

[Drakar]

Ok so while Im waiting for some parts for my LT1 I figured I would try my hand at the old Port/Polish. I need to know what will be good for what I am doing so here is what I have and you guys let me know what works best (from porters and polishers)

I have a Dremel :) ok I can always get an air powered die grinder or something along those lines if it is no good.

I have Iron LT1 heads and Alum intake and TB, so what kind of bits are best that you have found?

[Blue89rs]

Like yourself, I've decided to try my hand at polishing. The best kit that i have found is from SA motor sports.

http://www.sa-motorsports.com/cat/p5.htm

This kit is available for $84CAN.



Info:

TCS Transmission Products
6217 205th St.
Langley, BC V2Y 1N7 Phone: 604 533-8675
Phone: 800 960-1177
Fax: 604 533-7894

Part No. 260001 from Standard Abrasives

Ask for Marci, she is the one that gives the deal.

[Drakar]

thx,

I think it might just be an Xmas present to ME!!!

[79 Z28]

Ok so while Im waiting for some parts for my LT1 I figured I would try my hand at the old Port/Polish. I need to know what will be good for what I am doing so here is what I have and you guys let me know what works best (from porters and polishers)

I have a Dremel :) ok I can always get an air powered die grinder or something along those lines if it is no good.

I have Iron LT1 heads and Alum intake and TB, so what kind of bits are best that you have found?


iron LT1 heads? i thought LT1 heads were aluminum, except for the baby lt1s that came on those small motor caprices ???

[Drakar]

nope Iron heads came on the LT1' 350ci in Impala's, caprices, roadmasters, custom cruiser (oldsmobiles custom cruiser was a US only car)

These IRON LT1 heads are the 2nd out of 3 lt1 heads in terms of flow potential.

LT4 have best factory flow, and from some sources on the net have best ported flow as well.

best LT1 head - 96-97 Aluminum (F/Y - body)
middle LT1 head - 94-96 Iron (B-body)
worst LT1 head - 92-95 Aluminum (F/Y - body)

[79 Z28]

but the weight doesnt constitute the little extra flow, id pick the aluminum, plus you can run higher compression on pump gas ;D

[Drakar]

Stock compression was all about the same 10.5:1 even with IRON. kinda odd was my first though, but ill stick with the IRON till I can afford some LT4's no sense not buying the best head :)

[Rob116]

I second the nomination for the SA kit. On top of that, you might want to look into a long shafted "cone" shaped cutter. That's what I used most to shape my valve guides. Should be about 20 bucks or so. Hope you're in it for the long haul! :)

[CamarofreaK]

is porting/polishing hard to do or wat? anyone got and more info on doin it urself?

[Drakar]

TAKE YOUR TIME!!!!

I just finished up doing it on my heads, and it was my first time .... my only advice cause I still don't know shit, is take your time, it's not THAT hard it just is long and time consuming .... lots of patience too.

[CamarofreaK]

anyone know of a site i can look at about it ?

[Drakar]

anyone know of a site i can look at about it ?


http://www.ws6transam.org/ported.html

he uses 081 casting which is the 305 TPI head from 87-92, but it applies too all heads obviously, only diff are some heads need special attention in different areas then other.

[90_IROC]

niec site.... *thumbs up*

[Blue89rs]

I just did my heads not that longa go. I bought all of the dremel bits that could be found in the SA kit, but I found that many of them were useless. The main porting tool was a tapered tempered metal cutting bit. For all the other polishing, I used 60 and 120 grit sanding paddle wheels. The machinist said I must have been smoking crack because I spent 8 hours on both heads!

[jmacks93z28]

best LT1 head - 96-97 Aluminum (F/Y - body)
middle LT1 head - 94-96 Iron (B-body)
worst LT1 head - 92-95 Aluminum (F/Y - body)


This is not true.
They are the same for 92-97 aluminum heads...
refer to http://www.speeddensity.org/modules.php?name=Forums&file=viewtopic&t=49

[Big Lyndsay]

niec site.... *thumbs up*