The sizes had me rolling... I love that they are trying and getting it in... but they don't understand how things work completely when it comes to turbos for sure lol
That gasket you guys made where the wastegate hole needed enlarging is
going to cause major high exhaust gas temperatures. You left the exhaust
exit so tiny man. There is really no need to have any blockage there -
should of dremelled out the entire thing.
+Brandon Berry could you show how looks daytona blue on car? I need compare 229 and g217 on cars. I m looking for effect like this or similiar //i.ytimg.com/vi/GhxHcB3Pqhk/maxresdefault.jpgdark blue and gold rims I like it.
+viperfan Oddly enough, I'm in the process of wrapping my mom's Accord in that Daytona blue :D Looks pretty similar to the 3M gloss metallic, but I like how dark the 3M blue looks at night. All mysterious looking, ha.
Only the hood and the rear end. There's an LS1 in there now. I like it, haha.
How To LS1 Head Porting 853 vs 243 - DIY with Great Results! LS2 Z06 LS6 LS LSx
Audio is muted for most of the vid due to copy rights. Watch out for the air grinder! This is a video of my progress and results of porting a set of LS1 853 heads.
+Samuel Macdonald Thanks Sam! Great! Glad they've been helpful. Yes, you can hit that hump in the roof of the exhaust port very lightly to flush it with the rest of the roof. I did it on the set that is currently on my truck. I haven't broken through that hump and made a hole yet, but I don't think that there is water passage there. I think that I was given wrong information when I said that. I think its just extra material there for the valve spring seat. The tootsie rolls and arbor came from eastwoodDOTcom. You can also find a set at Harbor Freight (if you have one).
+AGearhead4Life Hey mate I know you state it fairly clearly above but just want to be very sure of it. You're saying that the hump in the exhaust can be taken right down to the same level as the surrounding roof? The same hump that you first thought might be a water passage? Just want to be crystal clear, wouldn't be great to get a hole in my head. Thanks a lot!!! Awesome videos and even better that they are followed up with updates. Also where did you get those tootsie rolls from and the piece they secure to?
+Samuel Macdonald Also, if it where my LS1, I'd be porting a set of 862 cast 5.3 heads for it. They flow the same, even with the smaller intake vavlves. Then I'd use LS1 intake valves in it. The smaller 61cc 5.3 heads will raise your compression and give more power. The LS1 heads are 67cc. Thats a good pump in compression. 5.3 heads can be found for about 100-150. Then you could sell the LS1 heads and they have a little more value.
+Samuel Macdonald Mainly i'd say leave the short turn radius alone still. Dont take any meat off of the floor, only smooth it. That hump in the exhuast just past teh vavle guide can be lightly sanded and removed to make the roof flat. Leave exhaust port "D" shaped. Which meants if you gasket match it, dont open up the bottom of the port, just the other three sides.
+Myopinionjustsaying Yep, that would be cool to see. I do have a set of 243s here that I need to do for a customer, but we probably wont invest the $75 it costs to flow test them. Its pretty much a given that they'll flow better, just how much better we wont know. I dont enlarge the port any, so there is no flow loss. I just blend and smooth.
I will say first you got some good numbers but it would still be interesting to see you do a set of 243's (maybe a cracked junker set) to see if "they" flow any better and THEN compare them. :)
Tip, keep dipping your burrs in welders grease the mig tip goop it works
great for keeping the burrs from getting caked with metal. Also it saves
time to use the single cut burrs to rough out the shape then come in with
the double cut or a finer single to smooth it out finishing with sanding or
flapper rolls to make it pretty. ;)
Headbytes Porting check out his channel on advanced porting techniques.... little aggressive for the average porter but there's solid logic and techniques anyone can use.
Did you get a valve job done after you did all your porting? Looks like
your seats maybe got touched here and there by the burr stem or a tootsie
roll... I am curious if you simply lapped your valves in or if you got a
fresh 3-angle valve job done to make sure you got a good seat. I am going
to do some porting and polishing in a couple weekends... hopefully I don't
screw them up! Was thinking about putting some tape or something around the
valve seat and on the stem of the burr to try and keep from touching my
valve seat at all. Thanks for the vids... very informative.
+poenisch Yessssir! It feels good to hear someone notice that. It takes me four times as long to do a project whenever I video it. It really slows down the progress, but I enjoy it. Some people don't understand that and keep asking me why I don't have a new video up more often than every two weeks. Crazy! lol I only do this on Saturdays and have young children. lol But yea, that's the main reason I made this video series, I couldn't find much info on how to port your heads. I had to research a lot of different threads on LS1tech and a few others to gather the information to make this video series. I'd like to make a new video that covers porting these heads, but make it really compressed into one 20 minute video. but that's way down the line. I've got a list of other videos to get up first. Good luck poenisch!
+AGearhead4Life Awesome. Thanks for the quick response! Glad to see somebody sharing their LS tuning techniques. There is surprisingly very little information on YouTube about these engines. I get a lot through ls1tech but it can be cumbersome to find the information you are looking for in the forums. Again, thanks for taking the time to throw together a video series... I'm sure the job itself takes a lot of time... To video your progress and then edit the video... That shows true dedication to your craft.
+poenisch Glad to hear you've found these videos helpful. That makes it worth the effort. Yes, I had a valve job done once I finished. It is a challenge to stay off the seats while doing all of this. Some tape would probably help. Good luck on the your port job! It's not too hard to clean them up and get some gains, just time consuming. Most people seem to make a mistake on their first set and the most common mistake is that they port match the exhaust port into a circle. The exhaust port should be shaped like a "D" because you're not suppose to touch the floor of the port, leaving it flat.
btw, you dont need to add brakes, you just need to add more weight (like
filling the tires with water, sand or something that can add weight and
still keep it in balance) this is how an inertia dyno works. brakes is only
needed to stop the dyno from rolling to a complete stop.
Forget all the ignorant comment this is a great idea. All you guys need now
is to use the brakes on that rear end to hold load, and a load cell to
measure the power. Thumbs up on my book. too bad i can't say the same on
that LS1 on an fc. lol
YUPP thats pretty redneck alright BUT with some work and development it
just might work aa pretty bad ass car that looks kinda funky hell if it
works it works
Just a beautiful day in FL! Out doing a little tuning check-up with this SLOW SS.
How To LS1 DIY Head Porting - Assembled
Back from the machine shop. Had .030" milled off and 2.00" intake valves installed. They did the valve job and also media blasted them. With .030 mill I'm ...
hey man, me again-i got another quick question?? im planning on
P&P(port&polishing) a set of 241 heads that i got FO' FREE!!! lol my
question is, I know that the 241's have a larger combustion chamber,so if i
were to just throw them on, the compression ratio would be less than the
stock heads...:( so i was wondering how much i would have to get milled off
the 241's so that the compression ratio is equal or a little bit greater
than the stock heads. Thank you very much Garrett
I do have a before dyno from LS Fest, but I like to be precise and I'm
afraid that I've done a few things that could effect my results. It made
282/279 through a 4L80E. Since last dyno the temp has cooled off
dramatically. From 104 on the dyno and its now chilly out. I have also
changed mufflers from dual 'Turbo" mufflers to a single 70 series
Flowmaster. Tubing also changed from 2" to 2.25".
FREE is good! I like that right there! To get 241's (LS1) 67cc chamber down
to 61/62cc the same as 862 's (5.3), you'd need to remove about 6cc. That
will be about .040" milled off. Remember this is a rough guestimate. You'll
need to measure to get exact. .007" x 6cc = .042"mill You also need to keep
in mind PTV (Piston to Valve) Clearance. PTV should be fine at a .040" mill.
Wow, thank you for the kind words! I do not belive you'll have any issue
milling your heads .050". But also take into concideration the cam that you
will run. A safe way is to check PTV (Piston to Vavle clearance). On the
"Squirter" project on my channel, I milled the heads .045" and ran a
228/230 585/585 cam on a 5.3 with not PTV issues. That example should help.
There should be some kind of award for guys like you who help people out
like this. Anyway I have one question, in this particular case valve
clearance is not an issue, that being said, I want to mill my 706 heads
.050" to get them down to about 54cc. Will I run into any other issues by
shaving this much off?
The exhaust may not make a difference but I know the Temp will. But I think
my gains should still be close. Maybe 10hp from the temp change. With the
work to the heads I'm expecting to see about 330 at the wheels.
Possibly more if you remove material from the chamber when polishing. So
lets say you open it up to 68cc. Then you'll want to remove about 7cc.
.007" x 7cc = .049" milled off
I do not remember the cost of the vavle job and mill man. Sorry. You can
contact them to see if they'll do mail-ins. Just Google the name "Southern
Cylinder heads".
I flow'd my first set that was before these. Flow numbers are in my other
video. I did before and after dyno with these heads and thats also in my
other videos.