quote Originally posted by Racingman24: I've got a Delta Cam in mine, have since I've had it together, so I can't comment on before and after, but I can tell you that it seems to work just fine without modification. Also, it does give it a noticable "lope" at idle. Aside from the fact that that much noise shouldn't be coming from such a little car, it's also fun when the engine lopes like a badass. It really, really confuses people that don't know. Eric

Eric,

Do you have any sound clips of the at idle exhaust sound?

Jeff

quote Originally posted by Jeff Smith: Eric, Do you have any sound clips of the at idle exhaust sound? Jeff

I can try to get some good recordings of mine tomorrow.

Gene

I will also get a better sound clip tomorrow, as I'm sure we have different exhaust.

But for now. . .

http://fiero.mn.org/Video/LookMaNoEther.wmv

http://fiero.mn.org/Video/KindALoud.wmv

Eric

EDIT:::
Also, those are before the Allante Intake, and the motor was idling a bit high. It's not a huge lope, just enough to make me happy, when it's idling properly.

[This message has been edited by Racingman24 (edited 09-13-2005).]

I've also had my cam in my engine for a while now. Been about 2500 miles now. No problems yet. I was told in another post that the .450 cam I got that Delta said would work with no mods was measured by delta with 1.5 rockers. The 4.9 has 1.6 rockers from the factory so the cam accually has .496 lift. Is there any truth to that?!? I havent had any problems or noises from my engine and I remembered hearing somewhere the springs would bind at anything above .450.

Yes, but the .496 number was measured off of my dial calipers at home. The formula for figuring lift is (lobe height-base circle)*rocker ratio. A more accurate number than .496 is .480. This is based on Delta's spec that lobe height minus lobe circle on this cam is actually .300, not .310. But they DO erroneously use 1.5 rockers to get their .450 number. I and several others have called Delta to confirm this. So the official lift for their drop in cam is .480".

-Rick

after emails back and forth I just came out and asked. What is the lobe lift. The lift on the lob at the cam. This is the number you multiply by your rocker arm ration to get your lift at valve.

________________________________________
From: Deltacam@aol.com [maimailto:deltacam@aol.com]
Sent: September 9, 2005 5:41 PM
To: capt@captfiero.com
Subject: Re: 4.9 Caddy Cam

CAPT,
The lobe lift is .300
Scott

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85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com

Any dyno sheets yet on a delta cam'd motor?
I remember the stock 4.9 swaps coming in at just around 160rwhp. So a 10% gain puts you at 176rwhp.

Here is 30 seconds of idle and some easy reving.
exhaust sound

In the next day or two, I will get some audio of it going down the road. The Supertrapps sound good when under a load.

Gene

Man that sounds good Gene.

Couple of questions -

What ECM chip are you guys running with the "drop in" cam - does RockCrawl's standard burn work with this chip or does it need to be reprogrammed?

What about emissions? Is this cam mild enough that an engine in good condition and properly tuned pass the "typical" emissions test?

I would really like to put one of these in my engine before I put it all back together but I am concerned with emissions.

Jeff

Sucker DOES have a bit of a lope to it, doesn't it? Sounds nice, Gene.

Oh I think I just messed myself.

DAMN that sounded good.

Now could ya go me a favor and tell me how you got a clean sound clip, mine always turn out garbled.

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85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com

TTT

How about it guys, does anyone have any emissions information on the 4.9 with one of these cams?

i.e., will they pass the typical inspection?

bump to read later tonight

quote But they DO erroneously use 1.5 rockers to get their .450 number. I and several others have called Delta to confirm this.

I've bought three cams from Delta, each one came with a spec sheet with the actual measured specs after grinding. Each one lists lobe lift and net valve lift. In each case they are using 1.6 rockers to get the net lift number.

quote So the official lift for their drop in cam is .480"

That won't work. The spring retainers will hit the seals. Maybe not all of them, but many of them. If Delta has sold hundreds of these as "drop-ins" and they net .480 lift at the valve, there must be hundreds of pissed off customers out there.

Rick, what does your spec sheet show for lobe lift and net lift?

Sorry Jon if you're still watching this thread, I don't know how I missed it.

I didn't get a card with mine, just a sticker on the box that says:

HYD ROLLER BP568-I
DURATION INT 203' EX 203'
VALVE LIFT INT .450 EX .450
COMPUTER AND INJECTION

My conversations with Delta were with Scott who was (supposedly) looking at his book and said several times that the 4.9 has 1.5 rockers, which we know it doesn't. At this point I don't know what the deal is. I'm just going to start it and see what happens. I'm a bit concerned about the large intake valves and the N* pistons colliding. But if ASG was doing it and Bud Adelman says it'll work, I guess I shouldn't be concerned.

-Rick

quote Originally posted by GT: Sorry Jon if you're still watching this thread, I don't know how I missed it. I didn't get a card with mine, just a sticker on the box that says: HYD ROLLER BP568-I DURATION INT 203' EX 203' VALVE LIFT INT .450 EX .450 COMPUTER AND INJECTION My conversations with Delta were with Scott who was (supposedly) looking at his book and said several times that the 4.9 has 1.5 rockers, which we know it doesn't. At this point I don't know what the deal is. I'm just going to start it and see what happens. I'm a bit concerned about the large intake valves and the N* pistons colliding. But if ASG was doing it and Bud Adelman says it'll work, I guess I shouldn't be concerned. -Rick

i still think you shouldve gone with the bigger delta cam, since you were modding the valvetrain anyways i dont think asg was using larger intake valves liek you were. they simply ported and polished the heads, added a cam with the maximum grind possible with the material they had to work with on the cam, and then modified the slot in the rocker arms to allow for the new cam geometry..they used stock caddy springs. maybe they altered the spring seats, i dont know about that one..

Woah, if that's true then I should be able to get 300+hp, which was my goal. I just looked at the technical specs page of the "unofficial" website and found these mods:

quote The engine is balanced and blueprinted. This is a process wherein every important tolerance in the engine is optimized to produce maximum power. The heads are decked, which helps raise the compression from 9.5:1 to 10.5:1 Heads are ported and polished New, higher performance pistons are used New, higher performance fuel injectors are used Hardened crank shaft and rods are used Cooper retainer ring is embedded into the head to improve head gasket retention under higher compression Replacement air box for improved air flow

According to this list they never touched the cam (again here we go with the assumptions) so if they got 290hp with just these mods, my engine's gonna be sick... if it'll start that is.

[This message has been edited by GT (edited 10-25-2005).]

I just called Delta...yet again...

The guy I spoke to verified that yes, it would be .480" lift with 1.6 rockers and the lobe hieght IS .300".
I don't have to worry about the valves hitting the piston even with 1.94 valves and flat top pistons because the valve is at max lift when the piston is down in the bore. He said you only have to worry about valve to piston clearance when you change the duration of the cam. So that's not an issue here at all.