Well, I'm not real sure if anyone cares, but I just had my car dynoed at the MidWest F-Body Meet,in Des Moines, Iowa,and came away VERY please with the results The only thing I wish that could have been different, was to run it a little harder, to see where the cam would have started to nose over But I told them to shut it down at 5500 rpm, to save the motor. Too bad, because the guys running the dyno said it was still making good power when they shut it down. Something about the motor not meeting the efficincy of the cam yet.

Anyway, heres the results, and these are RWHP numbers.

Max Power: 264.4 @5250 RPM
Max Torque: 273.8 @4500 RPM

Figure in the driveline loss, and it would be near 305 hp at the engine

P.S. I know that many others have stronger engines, but this engine started out as a $100 warrenty core, so I'm Happy

 

For no more than the mods you have, those are some pretty good numbers. Allow me to congratulate you first. Now comes the question, whats next?

 

Those numbers look a little low to me but good nonetheless

 

I bet your numbers would go up without the crappy stock air intakeon there. A $20 open element will go a long way on choked motor.

 

I would say that you will gain a considerable amount from changing your intake and air cleaner, as stated above.

 

well, I'll tell ya', the idea of an open element air cleaner dosn't appeal to me, over my stock one.

for one thing, the stock one is ducted to the hood, so it can breath colder outside air. an open element air cleaner would only be breathing hotter underhood temps.

and as far as the intake goes, the performer already sits high enough to make the air cleaner rub the bottom side of the hood

I understand that there is always room for improvement for anything, but I also know what the intended purpose of my car is, to be enjoyable to drive and low maintanance. its not a race car, nor was it ever intended to be one, just a nice step up from the original LG-4 305, that it came with.

I'm not trying to compete with anyone, because no matter how fast your car is,(or how fast you THINK it is), there is always going to be someone with something faster.

and as far as future mods go, I think its time for some new seats and a headliner, for starters, and then there is always those TT2 wheels, I have been wanting

 

one more thing to add, as far as the numbers looking a little low, they were within 2-3 hp of the LT-1s that were there

 

True, but a lot of hot air is better than a little bit of cold air. None the less your car puts down some great numbers that can put a big on your face.

 

Modded or stock LT1s? Was it a Mustang Dyno or a Dynojet, the Mustang Dyno will turn in a little lower numbers too...

THe cam you have is the single pattern 235 dur @.050, .480 lift cam? That thing has got to be wanting more intake....

I bet you'd see another 15-20 rwhp easy with a RPM intake and drop-base open element filter setup... But anyway you're still making good numbers for a street car, especially if it was a Mustang Dyno, congrats.

 

I believe the LT-1s I looked at, were stock, and yes, it was a Mustang Dyno.

I would like to say one more time, that the run was cut short by me, before the horsepower peeked. I just didn't want it to come apart.

I asked them to stop at 5500 RPM, to be on the safe side.

I know now, that I could have safely run it up to 6500 RPM, and maybe found out were the TRUE max. HP was

Next year I'll definatly find out for sure

Thanks for all the comments guys

 

Max Power: 264.4 @5250 RPM
Max Torque: 273.8 @4500 RPM


what the hell good does it do spinning a motor to 6500 rpm's if the powerpeak is 5250 like you say in your first post?

i can understand spinning it a little higher to get the rpm's up in the powerband for the next gear,but seems a litle senseless to spin it higher then needed...


btw,nice numbers,wish i would have went the route you went,ive spent assloads of money in my 383 and my cars been sitting since january,i envy you.

 

Like I'm trying to say, the run was cut short, at my request of 5500 rpm, but the print out that they gave me ended at 5250 rpm, with the horsepower still climbing.

I'm still a little confused as to why they didn't take it to 5500 rpm, but I guess that I have something more to look forward to next time.

To find the peak hp., going to 6500 rpm, might have shown were the cam would have run out of steam.

The guys running the dyno,also were confused as to why I wanted to limit the run to 5500rpm, because the HP was still increasing, at 5250 rpm. All I can say, is for myself, No Guts, No Glory, but I wasn't ready to take a chance at the engine being damaged, and being over a 100 miles away from home.

 

hehe...I understand not wanting to hammer on a new powerplant.

 

I have a vortec headed 355(not saying what it is in) but i got it dynoed in the middle of the winter with 215/70R15 winter tires!. I have a 200-4r so they had to start dynoing it at 3200 which was where the peak torque was so it could have even more but I will never know. They only dynoed it to 5100 rpm, for sum dumb reason, it should make peak HP at about 5800 RPM. The car was just dyned not ever tuned otr even the timimg played with, stock jetting in the carb. But heres the numbers.

Remember this is with a 200-4r so it is at 29% drivetrain loss.
236 hp at 4800 (dips down a bit at 500 but starts going up again at 5100)
328 Tq

that equals out to be 304 hp and 423 TQ, neither of these numbers are peak though, because the never took it to redline and because the started to dyno it after peak torque.

I want to get it dynoed again but this time I want to find a way to make the kickdown not work and take the motor right to 6500, that way i will know my peak hp and TQ numbers.

I think this engine is woth about 360hp and 435Tq.

 

i now have a headache.