Latest design in TB porting...
#42
TECH Addict
iTrader: (59)
Join Date: Oct 2004
Location: Vance, Alabama
Posts: 2,357
Likes: 0
Received 0 Likes
on
0 Posts
The stock LS1 and LS6 blade is 75mm, you can bore most of them out to 78mm. A few I have seen doesnt have enough material in the casting to go 78mm. Ive never offered a 78mm and have never done one but Ive ported enough of em to see that one or two here and there wont go that big so you may have to supply/buy/swap another.
#51
TECH Addict
iTrader: (41)
Join Date: Feb 2006
Location: Germantown Hills IL
Posts: 2,003
Likes: 0
Received 0 Likes
on
0 Posts
Is it me, or does that edge looks very crooked,,like one side got Pnp'ed nicly, and the other is still thick?,,like it wasnt machined evenly,,or it was done lopsided,, looks like half of the outer ridge remains...and whats different besides the lil swirly marks on the inside?,,im not getting the whole "latest design" thing,,,"latest method of porting" maybe...is that what is meant? Not trying to be a pain, i guess i just expected more than what it is..
#54
TECH Fanatic
iTrader: (15)
Join Date: Nov 2005
Location: Alexandria, LA
Posts: 1,889
Likes: 0
Received 0 Likes
on
0 Posts
Is it me, or does that edge looks very crooked,,like one side got Pnp'ed nicly, and the other is still thick?,,like it wasnt machined evenly,,or it was done lopsided,, looks like half of the outer ridge remains...and whats different besides the lil swirly marks on the inside?,,im not getting the whole "latest design" thing,,,"latest method of porting" maybe...is that what is meant? Not trying to be a pain, i guess i just expected more than what it is..
#57
Is it me, or does that edge looks very crooked,,like one side got Pnp'ed nicly, and the other is still thick?,,like it wasnt machined evenly,,or it was done lopsided,, looks like half of the outer ridge remains...and whats different besides the lil swirly marks on the inside?,,im not getting the whole "latest design" thing,,,"latest method of porting" maybe...is that what is meant? Not trying to be a pain, i guess i just expected more than what it is..
As far as the other questions, I believe we are the only ones to do a CNC program for the stock TB's, and it was CAD designed so the flow volume & velocity is matched on all sides where a hand port gives the same finish on all sides & causes turbulance as the airflow enters the blade area due to the un-even bore.
We are working on the truck ones as well as LS2's, but this took over 6 months to perfect so it will be another 45 days or so. We did several different cuts & patterns that looked good on the computer, but this design produced the most through the entire RPM range. Oh, our engineer that designs alot of this stuff was with Edelbrock in the old days & has been doing R&D for GM for years....including the pre-production LS1 heads.