AGearHead4Life

iTrader: (5)

hahaha I dont know how to take that comment, but it did make me laugh!

but looking at your sig, how the hell do you make 440 whp with only a cam?!? you saying that you didnt play with your heads? and is that a 5.7?

64post

iTrader: (5)

Better yet, use a shop vac and make a air wand, that's a small piece of thread attached to a straight piece of wire like welding rod or coat hanger. With the vacuum on up against the port, use the wand with the thread to find the "violent" areas vs the dead or slower areas where the thread doesn't go horizonal but lays down some. If you don't have access to a flow bench. It's not difficult make more flow but you can create problems for yourself if you take too much out of an area.

64post

iTrader: (5)

290? I believe it could be done by some but not by most, a 2.02 valve would probably be needed and put on a 4" test cyl. A 3.900 bore would shroud too much IMO, they would make more flow on a 6.0. LS2 etc.. Stock ported heads will more power no doubt, it's just easier for most to buy after market.

TT427

iTrader: (1)

Ohh, like the yarn and tape thing to help see your aero? Thats a good idea, I was also thinking you could use a shop vac anda small siphon tube at the intake entrance with some dyed water to see seperation and pooling or whatever... We will see, hoefully this summer its not m
y dd

TT427

iTrader: (1)

pretty sure the big differece is sand cast vs die cast. Supposedly the same port core, maybe the bump was removed...

redline61

Just want to say thanks for the videos. I was thinking about picking up some heads at some point to see what can be done.

AGearHead4Life

iTrader: (5)

Thanks Redline! Glad to hear that you enjoyed them. Good luck!

AGearHead4Life

iTrader: (5)

Y'all have got some good ideas there of testing the work. Thank you!

AGearHead4Life

iTrader: (5)

During my research, I read that it may be a good idea to leave that swirl ramp on forced induction cars to help the mix. Anybody have any feedback on that? I need to find out what any of the newer supercharged engines ports look like. If they're swirl rampless then I guess its not really very beneficial.

TT427

iTrader: (1)

Everything I have read by true head porters is the ramp only promotes swirl and tumbe, to help fuel economy and mixture... any performance app would completely remove it. Race heads dont have ramps.

TT427

iTrader: (1)

Grain of salt, thats typical sbc, would imagine that holds true here too.

AGearHead4Life

iTrader: (5)

Makes sense! Sounds like most of what I read also. I'm just as familiar with FI apps yet.

Yea, when I started this and noticed every aftermarket head had removed that ramp and then even LS3 heads didnt come with it, I knew it didnt need to be there.

AGearHead4Life

iTrader: (5)

I must have missed something? what about salt?

AGearHead4Life

iTrader: (5)

Well, I finally got the truck on the dyno yesterday for the "After" dyno. After the home ported heads and a tune on my 5.3 with LS6 cam through a 4L80E.

There are a couple variables of course (always are). For one the weather was the complete opposite as it was the first time. A lot cooler. Around 55 instead of the 100+. Another is that this was with the tune adjustment. We dont know how lean it was on the first run before the heads.

Either way, the truck put down respectable numbers with a baby LS6 cam and the 80e trans. It had an increase of 47rwhp and 55 ft lb of torque. Bringing it to 329 rwhp and 334 ft lb of torque.

No longer running lean. Cool part is that this is exactly where I guestimated it to be.

Now I just need to hold back this itch for a larger cam and focus on my Turbo 92 Camaro build. I do think I could greatly benefit from a stall on this 80e though.

TT427

iTrader: (1)

Thats respectable numbre for a 5.3 through an auto with a ls6 cam. Remember that the bore is a little smaller so the rewards might not show through the same as a 5.7 or 6.0 most are using.

RonSSNova

iTrader: (3)

Fun stuff, thanks.
I have ported SB and BB Chev heads with guidance from a pro in the past.
Also ported a few Olds Quad 4 valve heads...those thing flow! I had them measured. In fact, they flowed 280 intake and 210 exh at .400 lift!

I took the easy way out and bought AFR's for my LS1, But I have the stock 853 in the garage. I should play with them some day.

Ron

Kory 88Iroc Lt1

iTrader: (7)

It's nice to see your flow numbers were backed up by the dyno. Thanks for sharing the results.
Kory

78buturbo

iTrader: (1)

thats some good work looks good but im interested in using a 2.02 in the 317s ported for a blow thru setup do you guys think its worth the extra money

LsXRs

iTrader: (42)

would porting 243 be doing the same thing or are they complete different?

AGearHead4Life

iTrader: (5)

Yea, I thought that they were. THanks! Also, I believe the 80e is suppose to rob close to 20 more hp compared to a 60e.

Also, thank you for making that point. Too often would people frown and expect to see nothing but top numbers. small cam, small engine and a hp robbing 80e.