LE1 heads & Advaced induction valvetrain/cam

10297 Views 95 Replies 29 Participants Last post by stonebreaker, Apr 1, 2010

sportsta

Discussion Starter · Aug 7, 2009

Is anyone running a set of LE1 heads combined with one of advanced inductions valvetrain/cam kits? AI seem to cover all bases with the valvetrain and I hear only good things about the LE1 heads..

1 - 20 of 96 Posts

The Bolt-On Terror

· #2 · Aug 7, 2009

Whether or not anyone has done what you're asking, it's a moot point.
If AI spec's your cam/valvetrain based on your setup, ANY head will perform to its utmost potential.

96capriceMGR

· #3 · Aug 7, 2009

Pick ONE or the other, don't try and mix.

IMO you should pick Advanced Induction for everything.

Lance

· #4 · Aug 7, 2009 (Edited)

96capriceMGR said:
Pick ONE or the other, don't try and mix.

Well, my LE2 heads love my Ai cam! However, Karl did consult with Ai about matching one of the their cams with my LE2 heads and Crane valve springs. According to Ai, my cam was specifically designed to work with the Crane 308 double valve springs. Didn't have to spend extra $ for Ai valve train. Another reason I would recommend them. They're obviously straight with you and do not try and sell you stuff you don't need.

Would love to get a set of their TFS heads! Saving $.

Ram Air 383

· #5 · Aug 7, 2009

Choose one head porter and have them design a matching cam.

Lance

· #6 · Aug 7, 2009

Ram Air 383 said:
Choose one head porter and have them design a matching cam.

Definitely, the best way to do it if you are starting out. But even if you have heads already or just a cam, still talk to your porter about matching to maximize the potential of your heads or cam.

RatSSled

· #7 · Aug 8, 2009

The Bolt-On Terror said:
Whether or not anyone has done what you're asking, it's a moot point.
If AI spec's your cam/valvetrain based on your setup, ANY head will perform to its utmost potential.

I wouldn't know. But....

I don't think you would find a measurable difference between them. If someone claims some vast benefit to one over the other assume they are blindly defending whatever decision they made.

snakey5138999

· #8 · Aug 8, 2009

Some claim that LE's heads are good, but they are ported by hand, but he does give you flow charts. AI's heads are CNC'd, which is really the reason i would go with them....

lilronjohnson693

· #9 · Aug 8, 2009

snakey5138999 said:
LE's heads are proven to be good heads, but they are ported by hand, but he does give you flow charts. AI's heads are CNC'd, which is really the reason i would go with them....

Edited for accuracy

stonebreaker

· #10 · Aug 8, 2009

snakey5138999 said:
Some claim that LE's heads are good, but they are ported by hand, but he does give you flow charts. AI's heads are CNC'd, which is really the reason i would go with them....

CNC'ing doesn't guarantee good porting. It only guarantees repeatability. It will repeat a bad porting job as faithfully as it repeats a good porting job.

In particular with the LE heads vs the AI heads, I seriously doubt there's a rat's ass worth of difference between them. Even if Lloyd is still porting them by hand, he's done enough of them by now that his repeatability is probably close to perfect.

TAKN2XSS

· #11 · Mar 20, 2010 (Edited)

stonebreaker said:
CNC'ing doesn't guarantee good porting. It only guarantees repeatability. It will repeat a bad porting job as faithfully as it repeats a good porting job.

In particular with the LE heads vs the AI heads, I seriously doubt there's a rat's ass worth of difference between them. Even if Lloyd is still porting them by hand, he's done enough of them by now that his repeatability is probably close to perfect.

I come across this post recently. It is from 8-08-09, a couple days after the forum came back on line after the data deletion point.

Stone is obviously not an experienced porter that is obviously guessing and making an unknowledgeable guess at that. LE porting varies noticeably to the naked eye though he uses 'last minute' porting modifications to even out the flow readings which can be considered more important than visual appearance. However those last minute mods that cause the visual variation in any particular area to equalize the over all flow can easily be a result of offsetting a measureable visual variation in another.

Though the AI customer ports are CNC'd, are mastered (as noted above) from a hand ported set of ports. That means if there was a visual variation in the master it shows up in all CNC'd heads. I could readily see subtle variations in the CNC'd ports from AI I inspected, though I am not stating there was also a variation in the port flow as well. It should be noted that I have a 'trained' eye for detecting such variation, a skill shared by very few on this forum. Therefore, to an untrained eye such as stone's, the LE ports may appear "perfect".

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Bullyveldt

· #12 · Mar 20, 2010

TAKN2XSS said:
I come across this post recently. It is from 8-08-09, a couple days after the forum came back on line after the data deletion point.

Stone is obviously not an experienced porter that is obviously guessing and making an unknowledgeable guess at that. LE porting varies noticeably to the naked eye though he uses 'last minute' porting modifications to even out the flow readings which can be considered more important than visual appearance. However those last minute mods that cause the visual variation in any particular area to equalize the over all flow can easily be a result of offsetting a measureable visual variation in another.

Though the AI customer ports are CNC'd, are mastered (as noted above) from a hand ported set of ports. That means if there was a visual variation in the master it shows up in all CNC'd heads. I could readily see subtle variations in the CNC'd ports from AI I inspected, though I am not stating there was also a variation in the port flow as well. It should be noted that I have a 'trained' eye for detecting such variation, a skill shared by very few on this forum. Therefore, to an untrained eye such as stone's, the LE ports may appear "perfect".

I think we need to define "perfect" a visual variation that produces the same flow rates as the other ports, well would that not be perfect? Or does the visual variation cause some type of turbulance that flow rates don't reflect therefore changing the way combustion occurs from port to port?

KW Baraka

· #13 · Mar 20, 2010

Bullyveldt said:
I think we need to define "perfect" a visual variation that produces the same flow rates as the other ports, well would that not be perfect? Or does the visual variation cause some type of turbulance that flow rates don't reflect therefore changing the way combustion occurs from port to port?

Or good it be that Gary just felt the need to come in out of the blue to thump his chest and toot his horn; I mean......dredging up a 6-month old post to try to deliver a slam cwm3 ...........

TAKN2XSS said:
.....Stone is obviously not an experienced porter that is obviously guessing and making an unknowledgeable guess at that.......

Damn......always tryin' to start some -ish

.......

KW

96capriceMGR

· #14 · Mar 20, 2010

4

LE2 heads, all well documented on the big Camaro boards.

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TAKN2XSS

· #15 · Mar 20, 2010

KW Baraka said:
Or good it be that Gary just felt the need to come in out of the blue to thump his chest and toot his horn; I mean......dredging up a 6-month old post to try to deliver a slam cwm3 ...........

Damn......always tryin' to start some -ish .......

KW

If KW was not such an idiot I'd REtype and post the response to 'Bully' that I have typed up investing 25 minutes to do so. My attempt to post but was unsuccessful do to the piss poor connection that is so common on this questionable site. As it is I will not bother to invest another 25 minutes doing so. Truly sorry Bully.

As for KW KMA!!! If you would exhibit at least half a brain when you post the output would greatly improve.

TAKN2XSS

· #16 · Mar 20, 2010 (Edited)

My response to 'Bully' included comments that delt with the pics Dwayne has just posted above. But because of my frustration with this site and the idiot KW, forget it!!! KW knows about as much about govt. issues as he does headwork. DAMN little!

The connection issues this site suffers from are not however, as much of a problem as are some of its dickhead posters that post on it.

Synaptic

· #17 · Mar 20, 2010

Is that bottom flow graph a representation of the hteads before they were 'fixed'?

I notice the top graph flows a pretty close flow match.

Did these things make bad power?

1FAST94

· #18 · Mar 20, 2010

RatSSled said:
I wouldn't know. But....

I don't think you would find a measurable difference between them. If someone claims some vast benefit to one over the other assume they are blindly defending whatever decision they made.

I don't think the jury is in on that yet, as Pat has only a few runs on his Ai set-up. If indded he winds up going 11.0's or so then I'd say there is a noticable difference because then the next fastest would be an LE set-up at 11.50.

TAKN2XSS

· #19 · Mar 20, 2010

1FAST94 said:
If indeed he winds up going 11.0's or so then I'd say there is a noticable difference because then the next fastest would be an LE set-up at 11.50.

Waaay to many variables for a meaninful comparo.

KW Baraka

· #20 · Mar 20, 2010

TAKN2XSS said:
Waaay to many variables for a meaninful comparo.

True!

Same engine/car......with a head only swap would be much more meaningful.

Still, whether on the track or on the dyno, environmental factors would have to be as similar as possible.

KW

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