Best run (did 3) was 190.7HP @ 4100RPM and 282.5TQ @ 3000RPM. It's running super rich all through the RPM band. I need some sort of fuel tuneing device and go back. Not too bad for a 4.9 with no tune.

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88 Coupe: Modded 4.9L V8 5 speed
http://www.geocities.com/fast88fiero

Wow I was thinking about your car yesterday.
I just started tearing down the 4.9 in my garage that I pulled out of last years winter beater (92 Deville) and was wondering if you had gotten yours on the dyno yet.
I had figured your car for around 200 whp and 275 Tq.
I think with some tuning you will probably be there.
Those are the numbers i am shooting for on mine but it will not be together until spring at the earliest.
Too many other projects.
Thanks for posting that.
Rich

[This message has been edited by STRATOHACKER (edited 11-04-2006).]

I assume this is a chassis dyno? 190 hp at the wheels is pretty good for a bone stock motor. Are you running a 4T60e?

Wow, that's some torque for a normally aspirated motor. I'm thinking of pulling my non-smoggable 3.4 in my Formula and doing the swap.

I can see why winding these engines out down the drag strip at 5000 plus rpm they are not making good times. Looking at this chart you would want to shift around 4300 rpm.

On our 4.9 turbo our 347 ft/lbs or torque peaked at 3500 rpm and hp peaked and stayed vertually flat from 5200 to 6200 rpm at 290 rwhp. We shifted ours at 6500 rpm.

By comparing the to you can see these engines are not breathing very easily on there own. But they sure do launch hard off the line.

Thanks for sharing.

Pete

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Yep, it is a chasis dyno. I'm useing an Isuzu 5 speed. Going to do some tuneing and probably some sort of forced induction this winter.

Congrats!
The best N/A 4.9 dyno chart I've seen, up until now, was 180 x 264, through a Getrag.
Belonged to Chris Ackerman, in our club.
Here's a link to the chart.
http://www.etrackmasters.com/dyno/chrisack.gif (woulda posted it, but it's huge)

[This message has been edited by Raydar (edited 11-04-2006).]

Wow, torque falls off bad on those motors. It looks like a good autocross motor tho.

Torque peak at a nice and low RPM; PERFECT for the way I drive...

Ed

i thought peak torqe was in the 4000's and peak HP in the 5000's for those engines.


oops thought it was a north star.. My bad

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[img]http://img423.imageshack.us/img423/1603/streetbacksmr1md.jpgGT just waiting for the conversion[/img]

84 Fiero Turbo Vortec 4300 Phantom GT
L35 block, Syclone Intake and ECM
T31 turbine with T04B S3 compressor
super T61 waiting for next winter
www.cardomain.com/id/vortecfiero
Murphy's Constant Matter will be damaged in direct proportion to its value
Murphy's Law of Thermodynamics Things get worse under pressure.
Arthur C. Clarke "Any significantly advanced technology is indistinguishable from magic"

[This message has been edited by vortecfiero (edited 11-05-2006).]

quote Originally posted by PBJ: I can see why winding these engines out down the drag strip at 5000 plus rpm they are not making good times. Looking at this chart you would want to shift around 4300 rpm. On our 4.9 turbo our 347 ft/lbs or torque peaked at 3500 rpm and hp peaked and stayed vertually flat from 5200 to 6200 rpm at 290 rwhp. We shifted ours at 6500 rpm. By comparing the to you can see these engines are not breathing very easily on there own. But they sure do launch hard off the line. Thanks for sharing. Pete

Now the question begging to be answered is thier anyway to chnage the shift points on a auto?

quote Originally posted by linenoise: is thier anyway to chnage the shift points on a auto?

Wasn't Her86GT an Auto?

quote Originally posted by jscott1: Wasn't Her86GT an Auto?

[off topic] Yes it was [/off topic]

Fieromaster Port Polish and Cam correct?

The Isuzu seems to be the way to go on these motors if you want a manual. I'm tempted to change mine over, but I'm not looking forward to shredding 2nd gear as all Isuzus seem to fail that way eventually.

Still it appears you get more power to the ground with the manual.

You always get more power to the ground with a manual as there's less loss for them than autos.

Glad to see you got it to the dyno and it put down nice numbers James. Sounds like it's rekindled your interest a little too which is also good to see. Headers man, HEADERS! Id bet money that would help the drop off at low rpms in that motor.
Hopfully your good numbers and progress will spark eric into finally fixing his!

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" There was a lot of little kids there. I watched them flying, doing jumps, and having races. And I thought that all those little kids are going to grow up someday. And all those little kids are going to do the things we do. But for now, sledding is enough. I think it would be great if sledding were always enough, but it isn't."
--the perks of being a wallflower by stephen chbosky

quote Originally posted by linenoise: [off topic] Yes it was [/off topic] Fieromaster Port Polish and Cam correct?

That is correct.

Headders are the next step. I have axcess to a water jet, tubeing bender and tig welder. Those along with some fuel tuneing I hope to see over 200 HP and 300 TQ. Maybe solve some of the early fall off of the toque.

Has anyone dyno'ed an automatic?

Good, then ill bring mine over some some headers too since you got all that stuff!

quote Originally posted by FieroMaster88: Headders are the next step. I have axcess to a water jet, tubeing bender and tig welder. Those along with some fuel tuneing I hope to see over 200 HP and 300 TQ. Maybe solve some of the early fall off of the toque.

quote Originally posted by fierobear: Has anyone dyno'ed an automatic?

About ~150 WHP
http://www.etrackmasters.com/modules.php?name=Dyno_Charts#Pont

Gary Flint had a 4 speed. Chris Ackerman had a 5 speed. I think the others were automatic.
Gene's would have done better, but it hit the speed limiter, IIRC.

Here's the main page.
http://www.etrackmasters.com

has anyone had a carbed 4.9 on a dyno

that is a nice torque number. Only issue with these motors is they arent going over 5000 rpms. good for a cruising though.

This is the gtech readout from my old 4.9. Holley 500 2bbl carb, mallory digital ignition, K&N air filter, dual 2" exhaust. I am very interested to see how my new northstar will compare.

the torque numbers are off cause it was sampling from a higher rpm range and the mallory ignition box made the rpm count on the gtech go all funny while it was in the multispark rpm range.

[This message has been edited by Zac88GT (edited 11-05-2006).]

I have seen two completely stock 4.9 autos on a dyno, ours and rockcrawls. Both were just shy of 170 rwhp and I dont remember the torque.

I really think I can put down some better numbers with a tune. Its running rich through out the entire run. I need to get my chip reburned for the mods I have. Still running the chip I had for the stock engine.

quote Originally posted by FieroMaster88: I really think I can put down some better numbers with a tune...Still running the chip I had for the stock engine.

I didn't realize when I made my first post that you had a cam and port and polish. Still 190 hp at the wheels is pretty good.

quote Originally posted by jscott1: I didn't realize when I made my first post that you had a cam and port and polish. Still 190 hp at the wheels is pretty good.

I've got some ideas to make it better. It should have more power than that with the mods. I think my map sensor is bad causing the rich running.