4.6 2v power a little low??

[RichV]

PI 4.6, LT headers with off road h, dumped mufflers, steeda timing adjuster, stock ECU.

It makes 237hp and 277tq. Does that sound right? Not sure on the timing setup.

So so you guys know the rules, this is a local CMC Mustang. ECU tuning is not allowed. Does the HP/Tq sound right? Limits are 260/310. Seems like others are making the limits where this guy is about 20hp off.

 

[Royal96]

If it's a PI engine on a NPI tune, I could see 230 hp to the rear wheels being right.

 

[Frank.JD.Perez]

totally seems off but i also agree with royal

 

[RichV]

He said it's a 01 GT ECU.

 

[Frank.JD.Perez]

then something seems way off...

 

[Royal96]

So is it a full PI motor (with the lower compression bottom end) or a pi swap (pi heads on npi shortblock)? Because an 01 GT only made 260 HP to the flywheel. Factor in your typical 15% drivetrain loss and you're looking at 221 rwhp. Exhaust and timing can only get you so far. Still sounds normal to me.

 

[RichV]

So is it a full PI motor (with the lower compression bottom end) or a pi swap (pi heads on npi shortblock)? Because an 01 GT only made 260 HP to the flywheel. Factor in your typical 15% drivetrain loss and you're looking at 221 rwhp. Exhaust and timing can only get you so far. Still sounds normal to me.

PI motor top and bottom. 5 speed.

 

[wmfateam]

Make sure it doesn't have a Doormann (sp) intake.

Sent from my XT1254 using Tapatalk

 

[97stanger]

To be honest I don't think it sounds off at all. Factory PI motor came with 265 crank hp, when factoring in about 15% drive train loss that is about 225rwhp. To say he picked up 12rwhp from long tubes and a mid pipe on a stock PI motor if anything is generous.

 

[white95]

Echo

Echo

Looks good to me

Echo

 

[lwarrior1016]

Mustang's suck. These things are super weak

 

[Royal96]

PI motor top and bottom. 5 speed.

Perfectly normal then. These things aren't particularly n/a kings or anything.

 

[the5.ohh]

Yeah thats about right. 260 crank hp stock, so you're in the ball park.

 

[Nighttrain]

Now if he had a npi bottom end? Different story.

 

[Frank.JD.Perez]

Now if he had a npi bottom end? Different story.

pi heads, cams and intake? 9.5:1 comp ratio with npi bottom end right?

 

[Nighttrain]

I think its 10.5 to 1 gotta back track...blak would know fo sho. Now you deck the heads and do some valve reliefs? Look out!

 

[Nighttrain]

But the limit for CMC is 260rwhp i think

 

[Frank.JD.Perez]

I had about 280 or so, maybe more at the crank with my 98 pi and with my 97 I have about 220 to the wheels currently...it's enough to have fun and get in trouble with. But I need multiple tiers up from get in trouble. I need more like set up the road blocks and dispatch the pursuit Lamborghini hahah. Not that extreme...but it'd be cool

 

[lwarrior1016]

Pi swap will be around 10-10.5:1

 

[Nighttrain]

Pi swap will be around 10-10.5:1

Thats what i thought, really as long as you can keep the heads and intake flowing these 2v love compression. The higher the better