Question about my HP numbers

[Night Shifter]

I'm just trying to figure out what i should expect on my next adventure to the dyno. The last time i went i pulled a 247hp and 283tq on an 80* morning with everything in my sig excpept for the tune, pullies, and gears.. With the pullies and tune i should see around 267hpish right? I figure you only get about 5 out of the pullies and 15 from the tune...Or should i expect more out of the tune because i actually have some mods? Also, I always dyno my car at the same place in Fl so the numbers shouldn't be off since it's the same dyno..

I should be getting it done in May, but i might do it earlier than that but the only thing is that if i do it now i'll be 3200ft in the mountains.. What kind of loss in HP will i see if i do it where i'm at now?

thanks

 

[tank_567]

My steeda pulleys only gave me 7rwhp, not much. A tune will give you about 5-10rwhp.

 

[Night Shifter]

A tune will give you about 5-10rwhp.

That's all dang it, that's kind of dissapointing to hear

 

[04YELLOWGT]

That's all dang it, that's kind of dissapointing to hear

Unless you run premium fuel then you might pick up 20rwhp. I did that but that was when gas was cheaper, now it wouldn't be worth it for for an extra 10-15rwhp over regualr.

 

[Night Shifter]

im running the 93 tune... 20hp sounds better than 5-10..

 

[tank_567]

I just got my car dyno tune by a pro on 89/91 the car only picked up 8rwhp. My old car with 93 made 17rwhp. I dont think you can get 20 unless you run a ton of timing and lean it way out. Not safe for the street.

 

[ceracer33]

u guys can get away with running regular? damn even on a stock tune when i was practically stock my car would barely run at all on 87. if i dont run premium my car bucks and spits and sputters and u can hear it spark knocking like crazy. wonder why that is. i just figured it was a mustang thing.

 

[BurningRubber]

Even more important that PEAK HP numbers is the tourque increase you gain.

HP numbers look good on paper but tourqe will get you down the track.

I gained 6.9 rwhp from just a Diablosport handheld tuner but I got 13 lb ft from it, and I lowered my peak tourqe RPM.

So people get upset when you only gain 5-10 peak HP, but your numbers under your peak can actually be greater than that 5-10 HP...

Say a car makes 300 rwhp @ 6000 RPM. Say that same car is making 240 rwhp at 3500 RPM for example. Now his car may peak at 310 rwhp @ 6000 RPM, but instead of making 240 rwhp @ 3500 RPM, he now makes 263 RWHP at 3500 RPM.

Not that those are real accurate numbers, but you get the idea... same concept with tourqe.


And dont expect to gain much at all on an 87 or 89 tune... If you can run 93 octane, tune for 93 octane... you will be able to have more spark advance without detonation occuring and make a little more power.

 

[tank_567]

Even more important that PEAK HP numbers is the tourque increase you gain.

HP numbers look good on paper but tourqe will get you down the track.

I gained 6.9 rwhp from just a Diablosport handheld tuner but I got 13 lb ft from it, and I lowered my peak tourqe RPM.

So people get upset when you only gain 5-10 peak HP, but your numbers under your peak can actually be greater than that 5-10 HP...

Say a car makes 300 rwhp @ 6000 RPM. Say that same car is making 240 rwhp at 3500 RPM for example. Now his car may peak at 310 rwhp @ 6000 RPM, but instead of making 240 rwhp @ 3500 RPM, he now makes 263 RWHP at 3500 RPM.

Not that those are real accurate numbers, but you get the idea... same concept with tourqe.


And dont expect to gain much at all on an 87 or 89 tune... If you can run 93 octane, tune for 93 octane... you will be able to have more spark advance without detonation occuring and make a little more power.

all very true

 

[CobraRed_96_GT]

20hp from a tune? Those are cams gains, only way your getting 20 more hp is if your car was running like crap or you're recently blown and now getting a tune

 

[Winters98GT]

I wouldnt get it tuned, your car doesnt need it.

 

[CobraRed_96_GT]

I wouldnt get it tuned, your car doesnt need it.

I wouldn't get it dyno tuned, but a hand-tuner can't hurt

 

[Crzyhrse]

Your not gonna get 20RWHP from a tune for a bolt-on GT. You'll get 10RWHP max.

 

[Winters98GT]

I wouldn't get it dyno tuned, but a hand-tuner can't hurt

I agree

 

[04YELLOWGT]

Let me find my graphs, I did a hand held tuner with a 93oct tune and picked 20rwhp.

 

[Night Shifter]

Your not gonna get 20RWHP from a tune for a bolt-on GT. You'll get 10RWHP max.

I guess i can live with 10HP then... better 10 than 5. I was hoping for at least 15 since i spent $400 buying it from MPH.

ceracer33, I can't run my car on 87 either.. Tried it twice, both times it sputtered and stalled everytime i came to a stop, and that was only with H pipe and mufflers...I can't imagine what it would do on 87 now

 

[EPIK]

I had my car dyno'd with a catted H pipe, catback, & C&L 85mm MAF & with an email tune it gained about 14 rwhp & 17 rwtq over untuned, but the car was way too lean. Then I changed my exhaust to LT's & o/r H & got a real dyno tune & I picked up about 13 hp & only 9 ft lbs, but keep in mind that with the new dyno tune my car was at a safer more rich a/f ratio & was at a mild 19 degrees of timing. Then I added a few degrees of timing & put it back on the dyno & My car gained 12hp & 8 rwtq just by advancing the timing from 19 degrees to 22 degrees.

I started out @ 275 rwhp & 294 rwtq & by adding LT's, o/r H, & a dyno tune my car is now @ 315rwhp & 327 rwtq

That being said, I think that if you actually have a good tuner tune your car, I dont see why u wont pick up around 15-20 rwhp because u have most of the bolt ons that u can do on a 2V besides headers. I heard that the GT's have a pretty lame tune from the factory & with all the induction upgrades & no cats, your car is probably a little out of wack @ this point. Are u getting an actual dyno tune, or an E mail tune. Like I said before, I had bad luck with my e mail tune being too lean......Good luck with your tune....

 

[chrisconsin]

correct me if im wrong, but don't dyno numbers go down slightly when numerically higher gears are installed?

 

[Night Shifter]

I had my car dyno'd with a catted H pipe, catback, & C&L 85mm MAF & with an email tune it gained about 14 rwhp & 17 rwtq over untuned, but the car was way too lean. Then I changed my exhaust to LT's & o/r H & got a real dyno tune & I picked up about 13 hp & only 9 ft lbs, but keep in mind that with the new dyno tune my car was at a safer more rich a/f ratio & was at a mild 19 degrees of timing. Then I added a few degrees of timing & put it back on the dyno & My car gained 12hp & 8 rwtq just by advancing the timing from 19 degrees to 22 degrees.

I started out @ 275 rwhp & 294 rwtq & by adding LT's, o/r H, & a dyno tune my car is now @ 315rwhp & 327 rwtq

That being said, I think that if you actually have a good tuner tune your car, I dont see why u wont pick up around 15-20 rwhp because u have most of the bolt ons that u can do on a 2V besides headers. I heard that the GT's have a pretty lame tune from the factory & with all the induction upgrades & no cats, your car is probably a little out of wack @ this point. Are u getting an actual dyno tune, or an E mail tune. Like I said before, I had bad luck with my e mail tune being too lean......Good luck with your tune....

I hope mine picks up power like yours did.. Tim at MPH did the tune on my tuner if that makes anykind of difference. The last time i had mine dynod i thought the A/F would be out of whack also but at WOT it was 12.7.. so maybe with his tune i'll pick up a good amount of power and keep my A/F in the 12.5-12.7 range

 

[Night Shifter]

correct me if im wrong, but don't dyno numbers go down slightly when numerically higher gears are installed?

HA, i was wondering about that too but i forgot to ask..

If i get my car dynod at 3200 feet does anyone know how much power i will lose from being so high up in altitude? I'm gonna try to wait till May so that don't happed but theres a portable dyno lurking around here