chrisfrost

iTrader: (8)

Sears sells quality carbide burrs . And the ramp in conjunction with the long side no ramp of the bowl area of the intake port creates a swirling action of the A/F mixture so it can be beneficial depending . I would say most N/A engines probably benefit from some ramp , in other words some of it can be removed helping flow but leaving enough for a good swirl ,,,,,,,how much ? Good question . Forced induction probably pretty safe removing most of the ramp . I'm sure someone with more experience on this will chime in as this is a general guideline . Also , I recently read a post in this forum where an engine builder or a cylinder head specialist said that it's very important to leave the intake port rough even in FI appl so rough not just good for carbed but also for fuelie as well .

3rdCoastPowerSports

iTrader: (5)

I've been told by a few engine builders to finish the intake ports with a dull 80grit or even 120 grit is ok and then finish the exhaust ports to a mirror finish.
I was thinking about having these heads flowed but I am having trouble locating a local flow bench, so I guess im just going to stick them on and run them. the 1/4 mile will let me know if i increased my flow and velocity

AGearHead4Life

iTrader: (5)

You wouldnt happen to be in 29 palms would you? I see you location says representing Houston in Cali. I'm from TX and was stationed in 29 Palms and tried to build an engine there. It sucked. there werent too many sources for machine work.

AGearHead4Life

iTrader: (5)

I would say the main reasons i went with removing the ramp is:
-All CNC'd heads I saw had removed it
-the heads I admired (PRC 5.3 Stage 2.5) had removed it
-almost all i had searched had removed it
-I wasn't worried about emissions on this build, just Power
-it just made sense for performance

Now I may consider leaving it on my '84 C10 LS swap I'm doing since I plan on keeping it as efficient and emissions friendly as possible.

AGearHead4Life

iTrader: (5)

So how did it turn out? Any 1/4 mile time differences? Any tips learned?

Tell us yoru story.

sean.b

AGearHead4Life

iTrader: (5)

More info on head porting is going on on this thread:
https://ls1tech.com/forums/generatio...-can-help.html

I've also posted a 10 part video on this subject on my YouTube and in that thread to hopefully help others out.

studderin

iTrader: (28)

got along way to go still, but the drink is under the ramp on thouse.