viergutz2

Well did a little dyno tuning. After spending several hours chasing my AFR gauge around and around. I decided to take it to the dyno. I'm glade I did. It is not working right and its brand new. but anyways I have a
2001 5.3L
750 proform
edelbrock single plane
MSD ignition
custom headers
Trick flow cam

299 rw hp @ 5800 rpm
292 rw tq. @ 5300 rpm

89gmcs15

iTrader: (7)

Engine dyno? What trans if not?

viergutz2

No, that's at the wheels. The car is a 1989 notchback mustang. the trans is a th350 with 4.10 gears in a 8.8 rear end.

ZONES89RS

iTrader: (25)

My 4.8 beat you son!!! Lol

What converter and cam specs?

viergutz2

.216 int. .220 exh.
PAC valve springs
2700 converter

viergutz2

Nothing real special. this was my first LS, so it was a learning thing. I'm going to build another one to take its place.

89gmcs15

iTrader: (7)

You got a good baseline to start with. Id bet goin with a dual plane and possibly even a smaller carb youd see pretty good gains down low.

dogsballs

down low in an auto stalled car wtf?!?

nice numbers. mid 10's easy

ZONES89RS

iTrader: (25)

Yea, I agree, down low. That isn't much of a stall. My last two converters were 4000 and 4500, the new one will be 4400.

viergutz2

Wow, I didn't think to go that high. I'll see how it does at that track in a couple weeks.

BigEd_72455

iTrader: (7)

I have an almost identical build to the OP, except his has a cam and mine is still stock.

How far off would my numbers be compared to his? I have a nitrous converter that according to Freakshow Performance should footbrake to around 2800, and nitrous flash to 4000, and still on 3.08 gears (yes I know they will be killing my times). And no springs on mine either.

ZONES89RS

iTrader: (25)

The dyno numbers? Who cares. No two dynos will be the same and a stall converter will botch the numbers anyway. My s10 would never make 312 rwhp with an automatic.

newschool72

iTrader: (12)

Man , they must have something special going on in the air down under, OR you where guestimating 1/8 mile ETs ? The air around where I live will give a solid mid/high 12 with less than 300 rwhp.
Nothing wrong with down low with a stalled auto either, IMO. I really enjoy lugging through 1st and 2nd at mid throttle. The speed limit comes up really quick and gives a nice shove into the seat. Almost feels like playing with a clutch trans! A cam setup for good average power and a 2500-2800 stall makes for a fun ride!

speedtigger

iTrader: (16)

Maybe he thought the OP meant 300 Kilowatts.

dogsballs

lol, sorry 300 rwkw

Prorac1

iTrader: (4)

Sorry, first thing that I thought of, lol.

cruisin'73

iTrader: (8)

For comparison, here is my dyno graph. Albeit almost pointless to compare 2 different dynos…

-2001 5.3 with 106K when installed, now 109K’ish
-Completely stock internals
-Used/rebuild Speed Demon 750
-Edelbrock dual plane
-Ebay 4th gen SS headers, 1 ¾” Primary, 3” collectors
-3” straight pipes to Thrust mufflers dumped at the axle
-Rebuilt TH350
-2000RPM converter
-Original 2.73 gears




I think I am running into some sort of a top end issue as hp&tq peaks are to early and start to fall off too soon. I just got an AFR gauge installed and I am starting to put it to good use. I will also be swapping out the OEM springs for some Comp918s in the next couple weeks.

Do you have a graph or vid? Did you ever get your carb issues sorted out?

cruisin'73

iTrader: (8)

haha, this got me curious, and 1.21 gigawatts is approx 1,600,000HP! That should get you into the 10s right?

speedtigger

iTrader: (16)

That thing desperately needs a cam and some valve springs.

BigEd_72455

iTrader: (7)

different gears in the rear would make a huge difference in those numbers...

and yes, you are definitely having some sort of a problem. I have same year and size engine and I have 3.08 gears... But mine just sounds totally different. I have 2.5 inch exhaust also.