big hammer

rdymond

Thanks for posting this article!

I had read that article a while back but I was paying attention to the aftermarket cams. I did not connect the dots. This quote from their testing says it all:
I have also asked the dealer who I bought the 525 from to go back and ask GM Performance. If they are advertising Net HP on the stock crate and Gross HP on the other Crates, as demonstrated by this SuperChevy test, that is highly misleading.

Marc 85Z28

iTrader: (8)

It's not net. But it's also not gross.

G Atsma

What is it then? Not being a smartass, just want to know...

Marc 85Z28

iTrader: (8)

Go back and read?

G Atsma

Instead of your snarky answer, it would have been easier to just say which measuring method was used. Thanks for nothing.

big hammer

Project GatTagO

iTrader: (7)

My buddy Bob has one in his 67 GTO. I think it made 440rwhp.

Another option is to get the 430hp LS3 and install a different cam. Another buddy did just that in his 66 Fairlane. The car is over 4000 pounds with him in it and it rips!!! Ran 11.85@114mph at LS Fest.

Andrew

G Atsma

I think that is by far the best way to go

KW Baraka

iTrader: (7)

As previously stated in post #12 of this thread.

KW

Norbit2

Anxiously awaiting the next set of results!!!
When you say you have cats, do you have stock cats or high flow cats? If you want to keep cats, I did as well and will be using them with the LS3 you NEED a set of high flow cats. I am using American Racings high flow catted Y.

P31Jeff

Back to the original post, just completed an LS1 to a crate LS3 376/525 swap in a 98 T/A. Sent the computer out and had it tuned for the LS3 . Very disappointed . Runs like **** so far. Will keep working away and get it figured out and keep you posted.

G Atsma

I wonder if he tuned it for a 430HP LS3? That WOULD mess it up!

rdymond

i had my 911 with the 525 out for its first AutoX about 3 weeks ago. The engine made tons of power at rev, however it stalled often and was hunting at idle. It will go back to the tuner for adjusting idle and low rpm behaviour. I am hoping to improve its street manners.

P31Jeff

Tuner was given ALL the details of the car and engine. Just wondering if the computer has to do some learning on its own ? We did change the throttle body to drive by cable . But the tuner new that . And we are running long tube headers with no cats so only 1 02 sensor per side. Sits there and idles fine but the throttle response is terrible even in neutral.

KW Baraka

iTrader: (7)

Cam.....has.....too.....much.....overlap.

You either need a dyno/street tune or a more smartly spec'ed cam. But a mail-order tune just won't cut it unless it's derived from a dyno/street tune from a similarly spec'ed cam.

KW

G Atsma

ASA cam used on the street = a good lamp post....

lees02WS6

iTrader: (5)

This, a million times this. This cam hates being lugged (anything under 2k rpm), I can only imagine what it must be like running it with an auto. It likes a high idle 850-950, has a very pronounced lope, and the unburned hydrocarbons are very noticeable.

Project GatTagO

iTrader: (7)

There is quite a bit of hyperbole in the above statements. I run the ASA cam in a 5.3L Gen IV engine. I have a HiRam intake with huge runners and two (2...!) 87mm throttle bodies on top. I have a T56 and 4.33 gears....but, I always take off in second gear on the street, unless I am on a hill. I have it idling very nicely with a target idle RPM of 825. I can lug it down to 1200rpm on the highway and it does not protest. It does have a very nice lope at idle. I have taken care of the unburned hydrocarbon issue by adjusting the injector end angle, which really helps. By timing the fuel injection pulse in time with the valve events, the "fuel" smell at idle is greatly reduced.

In short, with good tuning, this cam is a ***** cat...

Andrew

Project GatTagO

iTrader: (7)

The ASA cam only has 11 degree of overlap...that's almost nothing...

Andrew