Stage 1 Porting

[Paul Workman]

Originally Posted by Topfuel

When porting aluminum ... Soap seams to work better for me. ATF or WD-40 adds oil to the pores of the aluminum and if you have to weld on the Aluminum afterwards the oil will mess up the welding just my .02 worth

Keep the slightly rough surface on the ports helps keep the boundary layer smaller on the air flow.

"Oil messing up the welding"... NOW he tells me/us! (spent "a little" on welding myself!)

Thanks for that input. I tried a little sample of a water-based cutting liquid - seemed to work OK. But, it was just a sample that soon ran out and the WD-40 was handy and seems to work just as well. I'm well aware of the aluminum porosity, but never thought much about oils like WD-40 penetrating the pores - leading to issues when welding (heads especially).

Well...That tip is worth the Arty Johnson "Veddy Intorestink" award!



P.

[LGAFF]

Still open to doing these

Stage I for $450
Stagr for $700

[z proud]

any dyno # for stage 1 and stage 2?

[LGAFF]

No and honestly i doubt there would be a large variance, I had planned on a dyno test but unfortunately I have bad rings.

My stage 1 is not much different than what many consider a full port job. If you are not port matching the heads you wouldn't want 36mm at the head face anyway, as there would be air turbulance from going from 36mm to 34mm(air hitting a wall)

The biggest obstacle is the Inj bosses and I take them out.

[Scrrem]

Originally Posted by LGAFF

Still open to doing these

Stage I for $450
Stagr for $700

Lee,
Give this some consideration, what's the turn around on a Stage I job?
Rich

[LGAFF]

Pretty quick, I already have a set of IH ported, I would just need to do a Plenum which only takes a weekend to complete. The IHs are black, would need to be painted or PCd


If you do not want an exchange, meaning me porting your exact plenum and IH, I would say 3 weeks. I do have a meeting in CT from 11/9-11/12

[LGAFF]

Just an FYI, I will be trying out a Powdercoater and will let everyone know the results, he already has done a few sets of wheels for me......

Siamese port project starts soon and I will be pulling my ported intake off soon, will be available for core and $.

[LGAFF]

Shot of what I consider Stage I...these are coming off the 90 and will exchance for stock pair for $450, the $450 includes porting your plenum. These IHs are currently black.

[Paul Workman]

Originally Posted by LGAFF

Shot of what I consider Stage I...these are coming off the 90 and will exchance for stock pair for $450, the $450 includes porting your plenum. These IHs are currently black.

Thanks for sharing, Lee. Mine (below) are modeled after Pete and Marc H's. I don't know what "stage" they would be equivalent to, but generally follow Marc's line of thinking; "...you really can't make the plenum and the IHs too big on the LT5." - don't know what "Stage" they would equate to.



But, in comparison, there seems to be a bunch more meat and flow shaping to be cut around the secondary injector boss in the pic of your IH, no? And, it looks like there is little or no expansion of the IH outlet into the heads. I'm not critiquing, but just trying to get an idea of your "Stage-I specification". For some reason, this induction design vs. performance stuff always fascinates me, I recon.

P.

[GregCrowe]

Has anyone done any before/after dyno tests from just porting the Plenum and Injector Housings ?