Project 3400 Roller Cam Block (Page 11/82)
lou_dias JAN 10, 05:23 PM
I'm using the MSD coil...I'm pretty sure I have 3 bad plugs along the firewall. The easy 3 have NGK UR5's. I always run super as my compression is ~9.8:1.
Using ACCEL wire kit as well. Everything points to the 3 plugs. I am using the chip you sent me.

Do you think a Trueleo with a bigger TB will fix the fuel issue if it's the tune and not the plugs? I'd like a 13.1 a/f ratio for the street. I believe this dyno over-loaded the car on the 4th gear pull. It had a list weight of 3000lbs for the fiero. 1800 rear.
Silentassassin185 JAN 10, 06:25 PM

quote
Originally posted by lou_dias:
I believe this dyno over-loaded the car on the 4th gear pull. It had a list weight of 3000lbs for the fiero. 1800 rear.



Just curios to what effect this would have on anything? They ran my car at 3000 or 3100 I forget which and I'd like to know what that would do.
patch JAN 10, 06:57 PM
Nice numbers Lou! I understand that you're running 2.5" exhaust but I didn't catch what headers/exhaust manifolds you're running?
lou_dias JAN 10, 09:26 PM
Trueleo headers without EGR.

Thanks!
Francis T JAN 11, 09:40 PM
Our intake will resolve your rich A/F above 4.5k. Stock intake just wont flow up there. BTW you wont need a bigger TB to see a major dif or bigger injectors. Stock chip should be fine too. You can call me if you have any questions.

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Trueleo.com/fiero.htm
RSpiderII@aol.com

Francis T JAN 11, 09:50 PM
BTW: your MSD ignition may be fine, I suspect that very rich A/F ratio to be the cause of misfires. Cant to see it the numbers when you let it breathe!
Darth Fiero JAN 12, 01:08 AM
If you are using stock casting iron heads, even ported they are still going to be the ultimate bottleneck no matter which intake setup you use. I don't think bolting on a trueleo intake is going to automatically solve your problems. Having said that; I doubt the 11:1 - 10.5:1 or so AFR is causing the misfires. It could be, but I have seen many stock applications run far richer than this and never misfire. Seeing as how you haven't changed 3 spark plugs, that is the first place I would look.

Don't get me wrong, no matter what I'm sure you will still need some further tuning to get the AFR's in-line. But as you've said you have not yet changed 3 of your spark plugs. That is the first place I would look for a problem.

-ryan
Francis T JAN 12, 04:20 PM
On the flow bench our intake flowed enough CFM with a stock iron head to support well over 300HP. The stock intake is the main CFM limiting factor on these engines.
The numbers below are easier to read on pur site, the cut and paste didnt work too good. trueleo.com then Fiero intake

Flow-bench numbers for Stock intake and SR14 & LR17 below.

Valve lift
.100"
.200"
.300"
.400"
.500"

stock intake CFM
55.945
106.88
124.415
131.93
139.445

Discontinued: Trueleo Long runner CFM
59.786
111.055
130.26
144.455
146.125

Trueleo Short runner CFM
62.625
114.395
133.6
146.96
146.96

no intake-head CFM
64.295
116.9
133.6
146.96
146.96


On the flow-bench we tested the cylinder head with no intake on it all to get a baseline. We tested the bare cylinder head and intakes at 5 different valve lifts in the above listed amounts. We then tested the stock intake manifold with the results above. The long runner intake and short runner intake were also tested. As you can see with the results, both intakes are improved over stock and the short runner intake will flow as much CFM as no intake on there from .300" lift and above. Pictures on the flow-bench at H.P.WORKS below. BTW we dont make the long runner intakes anymore.

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Trueleo.com/fiero.htm
RSpiderII@aol.com

lou_dias JAN 12, 04:52 PM
Well, I do believe the Trueleo intake would help over 4200rpm. I'd love to stick an Allante throttle body on it.

I still think I need less fuel below 4200 though.

Please keep in mind I'm running the stock water separator/air silencer, stock air filter (FRAM).
I'd like to fix one of the exhaust bends just before the muffler.
I'd like to try little tweaks like a K&N, punched out water separator and one of these from Rodney as well:


This is the first nonVVT v6 with a 6 speed to be dynoed.
I'm using cast iron heads and also I was told my shortening of the intake would kill my HP which it didn't.
We now have and Fiero upper with 3400 lower dyno on the books to compare to.
Still running the V6 ECM with an internet tune from Darth. Darth, if you still have me on file, looks like a little less fuel wouldn't hurt if a remap is possible. I'd like 13:1 a/f ratio but will try to get the back plugs changed and the other little things done first.

I'm hoping to coax mtownfiero into doing a '7730 swap for me after I fix my 4.9 engine mount so that I can drive the yellow GT daily while the '7730 w/DIS swap is under way.

This thread is old, but when money and having a daily driver are an on and off issue, that's how it goes...

[This message has been edited by lou_dias (edited 01-12-2009).]

lou_dias JAN 12, 05:42 PM

quote
Originally posted by Darth Fiero:

If you are using stock casting iron heads, even ported they are still going to be the ultimate bottleneck no matter which intake setup you use. I don't think bolting on a trueleo intake is going to automatically solve your problems. Having said that; I doubt the 11:1 - 10.5:1 or so AFR is causing the misfires. It could be, but I have seen many stock applications run far richer than this and never misfire. Seeing as how you haven't changed 3 spark plugs, that is the first place I would look.

Don't get me wrong, no matter what I'm sure you will still need some further tuning to get the AFR's in-line. But as you've said you have not yet changed 3 of your spark plugs. That is the first place I would look for a problem.

-ryan



the heads are ported to hell and back and polished and maintain the vane
I think the guy did a better job than the falconer heads I've seen pics of...local guy at that...