speed_demon24

iTrader: (6)

So your ported intake, e-wp, 4.10's, weight reduction, drag wheels, skinnies, ect aren't worth anything? Not to mention a 10 bolt with a suspension setup setup for the road course is defiantly is not worth "way more than 1 mph" since I have to basically bog it off the line which kills mph too.

Let's also ignore the fact that I did indeed gain .2 and 2mph in the 1/4 and 25rwhp by swapping my LE2's with a ported intake to Ai 200's with an unported intake on the exact same setup in the same car.

Bersaglieri

iTrader: (13)

Same DA, same drag strip, same suspension setup, same tires, same weight, same tune, and same camshaft? The only thing changed were the heads and intake? Wow, I'm sold already.

-Dustin-

mdacton

iTrader: (3)

problem isnt so much the heads.....

you could give alot of people here the best head on the planet and they wouldnt run worth a ****. problem is not taking everything into conmsideration as a package and sticking to a plan.

speed_demon24

iTrader: (6)

I guess you need to tell all those race teams to stop cnc'n their heads then. Also to make any profit selling hand ported heads to the general public you won't be able to spend the proper amount of time porting them which results in a dramatic reduction in quality.

Case in point my old heads.

speed_demon24

iTrader: (6)

It was a h/c swap tuned by the same tuner, and yes to all of your other question considering I said "exact same setup" I even managed to cut the exact same 60' on both runs somehow down to the thousandth.

RamAir95TA

iTrader: (2)

<flame suit>

I have no qualms with either vendor. But like gregrob and Pat, I went with AI for their consistency. CNC has several advantages over hand porting, more-so than hand porting over CNC. CNC eliminates direct human error, each port from head to head is IDENTICAL, and the combustion chambers are IDENTICAL (crucial for a consistent SCR/DCR from cylinder to cylinder).

Those last two sold me. Attached is a graph of an LE head (not my research), with each exhaust port flowed individually.



I'm not claiming to be an expert by any means, so draw your own conclusions. IMO, if you want a head that will satisfy moderate HP goals, the LE heads can get you there. But if you want the top of the line ported stock castings, go with AI. The results speak for themselves.

About the customer service...if you went to McDonalds, ordered a burger with no pickles or onions, and had it ready and rung you up in no time, but your burger still had everything on it, would you be happy?

Even though I had no communication issues with AI like some people have complained about, I'd still rather sacrifice a little customer service as long as the product they deliver is head and shoulders above the rest.

</flame suit>

RamAir95TA

iTrader: (2)

We just posted the same graph...hahah.

Bersaglieri

iTrader: (13)

This is the plain and simple truth.

Also, how old is that information? [graph]

-Dustin-

Puck

iTrader: (17)

Like I said, CNC heads finished up by hand are the ideal setup. If you think the big shops pull their heads off a CNC mill then slap them on their race cars you are sorely mistaken. I also already mentioned the same thing you did - for hand porters to compete on a large scale with CNC porters they need to either raise their prices or spend less time on each head. If they don't do either, they essentially are cutting there labor rate to get a comparable product.

Just like mdacton said already, its the whole package that dictates how a car runs, not just the heads - as evidenced by your less then stellar 11.89 even though the car is making good power (no offense, I know its not a drag car).

wrd1972

iTrader: (12)

Im sure there is no agenda with the graphs being posted. I mean seriously, we should all compare numbers at .800 lift and throw them on the boards for discussion. I am sure there is no ill intent here.

SS RRR

iTrader: (2)

The problem I see is there have been far more under achieving LE packages and QC problems as evidenced by the pics and results that have been posted here and cz28.com in the past. Perhaps that has been improved upon or people are too loyal. I remember years ago some poor bastard got a pair of LE heads back from being worked on where the pinch area had been ground into the water jacket, welded up, welds were not cleaned up enough for a stock pushrod to clear as well as several valves being different lengths as well as different springs. It was comical to see. Wish I would've saved the pics. It was then I decided LE wasn't worth the trouble.

mdacton

iTrader: (3)

from .500 to .600 there is a pretty big difference........ I would say maybe 20hp worth or less. Is there a similar graph for the intake side?

wrd1972

iTrader: (12)

Am I reading it right?
About 168 +/- 6 points at .600 lift?

I am not justifying the above because I would agree that there should be no difference in the numbers.

I dont really have the knowledge to say how this will impact power. But I do know that posting the .800 lift numbers on the chart is an attempt to inflate the differences and to pour salt in the wounds.

mdacton

iTrader: (3)

i agree with you some....
nothing will be perfect but trying to get them as close as possibly will help.

6801

i was in a huge debate over le2 and ai 190 heads. i placed a order for trickflow 185x heads at summit two weeks ago i couldt decide what way to go i was ready to send my heads out. i went to summit to get some parts by chance the heads just arrived so since im new to lt1 and couldt get over the debate im goona be one of the first to let you guys know how thy work. plus i have a year to decide were to send them for more porting unless i run 11s out of the box. im also gonna try 292xfi cam. with all supporting mods.

AChotrod

iTrader: (17)

SD24 Im not taking anything away from your car cause it runs its *** off and is well built. Wasnt there other issues with your old set up like Improper push rod length?

IMO my mods that make any difference on the top end(EWP/Intake) are out weighed by your 10 bolt. With a 10bolt Im guessing my car would see more like 2-3mph increase. My car has barely any weight loss. My suspension was STOCK WS6 with all NON adjustable parts. Probably more road race than yours. **** I also run a clutch thats 20lbs heavier than any single disk. Thats 20lbs on the crank and dont 3.73s also dyno better than 4.10s?

Again I have never said anything remotely bad about AIs products. They make top notch stuff. I just chose LE as my guy and a still very happy with my choice to this day.

Puck

iTrader: (17)

Agreed, to the uninformed that graph is pretty misleading.

I am willing to bet even a factory stock casting has close the the same 5-6cfm spread at .6".

Of course that will increase more and more as the lift goes up, but its pretty foolish posting cfm differences at .8" on a set of heads whose cam was probably .575 .

mdacton

iTrader: (3)

**** mine was worse from port to port, way worse. dynoed before and after it was corrected and no difference at all.

Im not saying in an all out ***** to the wall effort it wont. But most of the time its isnt going to be enough to amount to anything to lose sleep over. Far more important things

mdacton

iTrader: (3)

no sir, I disagree with that. willing to bet you would see no difference at all

96capricemgr

iTrader: (1)

How about we compare your car to mine.