My dyno numbers

[ebk06]

What do you guys think? I was satisfied with the numbers. A little higher than I expected on the torque. The humidity was really high that day and it actually started raining during our group runs. I dont think it effected me too much though.

Heres my sheet hopefully its big enough to view clearly.

87 LX 5.0
Longtube headers (not sure of brand)
Moroso CAI
Mac Off-road H-pipe
Mac Pro-Dumps
MSD Blaster Coil
FRPP 9mm wires
FRPP Cap and rotor
18* timing
Smog pump delete

 

[MustangOwner]

Those are some nice #'s for those modifications. I'd be perfectly happy with that. My buddies car has the same setup but shorties and he put down 206. You must of gained extra hp with the LT's and the 18 degrees timing. Thats seems high doesn't it? His is at 14 degrees. Long as it doesn't ping i guess.

 

[ebk06]

You are right the timing is high but since its not my daily driver I run 93 octane in it. Im actually going to bump the timing a little more this weekend. No signs of pinging either when I had it at 20* a few weeks ago. I just got a bad feeling having it set so high and moved it down but I read in a few places some foxes have had it at 22* with no problems. My cars an 87 with about 97K too.

 

[MustangOwner]

I've read that the highest you should go (safely) on a stock motor is 18 degrees of timing. And thats rec. for the drag strip only. On a daily street driven stang, you want to stay at 14 degrees or below. Now if your gonna step it up to 20 degrees timing, well as long as it doesn't ping is the only concern! But i'm not sure that you will see/feel any gains by upping the timing on your n/a setup anymore. Run your car on corn fuel and you'll be able to take advantage of the 105 octane!

 

[ebk06]

Ill have to look around some more. I dont wanna blow a motor or anything. The car does run great though.

 

[FastDriver]

I hope it wasn't an earlier post by me that led you to set timing so high. Do not bump base timing over 18*. In fact, if you are running stock heads, your timing light and timing marks are correct, the spout connector is out, and you are otherwise measuring properly, 18* is about 4* more than you should want it to be.

Furthermore, it is not one of those things that you can keep getting more power by adding more timing(advancing it). There is a "just right" place where retarding will hurt power and advancing will not help. According to a little reading I've done that occurs when the cylinder pressure is at it's peak right at 10* ATDC. I don't think that is a certainty under any conditions, but at 18* base timing, plus your computer's 16* advance at WOT higher in the rpm band, you're very likely to detonate and damage your engine.

Bottom line: do NOT advance your timing beyond 18*. I've done it before, but I was running AFR 165s, which have chambers that are much more efficient and much less likely to cause detonation.

Chris

 

[ebk06]

No I've read in numerous places you could bump the timing......maybe im wrong and its at 16* lol Now im curious ill have to check it when I replace the rack Sunday. The car does run good though and I have never had pinging or problems do to the timing.

 

[85_SS_302_Coupe]

Anything over 210hp on a mostly stock engine (especially stock heads/cam/intake) is really good, considering they were rated at 225hp.

 

[ebk06]

Anything over 210hp on a mostly stock engine (especially stock heads/cam/intake) is really good, considering they were rated at 225hp.

Yea I was only making 23 les hp and 11 more tq than my friend 01 bullit and 11 less hp and 19 more tq than my other friends 01 GT We are going to the track on the 25th and im going to run the 01 gt and see what happens. Should be a decent run.

 

[FastDriver]

Given the equal drivers, beating both of those cars wouldn't surprise me in the least. Your car should be quite a bit lighter than either of them. Your hp numbers don't surprise me at all. It wasn't rare to see a speed density car ('87-88) make 200 rwhp on the dyno without any go-fast parts and only a "ten-minute tune-up."

Buddy, I've been playing with 5.0s for a long time. It's not a question, it's a fact: 18* timing is too much on the stock e7 heads. Not all gas is the same grade. Temperature, humidity, load, and long engine running durations can all have an impact on detonation. You're not always necessarily going to hear detonation. Although, you would lose power if you were getting detonation, and your car seems to be strong...

I'm all for getting the most from your combo, but 18* is too much for me. I don't think you'd lose anything dropping to 16* and maybe only a very little dropping to 14*. If your car is detonating, the first sign would be lower EGTs a slight loss in power (on a dyno), and the "ping" would not yet be audible without something like a stethoscope. If you go up to 20*, you're making a mistake. Fortunately, the 5.0s take detonation pretty well in stock form because of their forged pistons, and low v.e. You're more likely to blow a head gasket than damage anything, but why risk it in the first place? If you choose to, I'm hoping the best for you.

Chris

 

[ebk06]

Thanks for the advice. Ill check the timing this weekend. Its possible Im wrong and the timing is set at 16* already.

 

[25thmustang]

I run 18 degrees... if it makes the most there then leave it, so long as it doesn't ping...