I take it your rail pressure is fine? Who's injectors are you running and were they tested? Have you checked for boost leaks? Are you running big tires? Just throwing out some questions so others can chime in. At least your numbers are consistent. :confused013:

 

Rail is perfect, doesn't drop at all, injectors are extrude hone 150hp with about 10k on them and the new bodies, no boost leaks, tires..... Yes lol 37-13.5-20 on a 20x12

 

Mustang dyno or dynojet?


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What kind of dyno? Corrected or not?

 

Does running bigger tires cause lower hp numbers on a dyno? I have no clue

 

The one run was at Woodburn on the inertia right? Have you been on a mustang?

 

I would say your tires have all to do with it. 37's and what? 3:73?

 

Increased tire size moves everything to the right. Doesn't really lower numbers at all.

 

Tire size does not make much difference...

^treed

 

So gear ratio makes no difference?

 

No.

We run 3.42's in our street truck and it made just shy of 1200hp.

Gearing makes no difference.

 

Take it to the track! That will get you real results. Some truck just dont dyno well.

 

^Manuals are more rare to dyno poorly. Manuals are also more subject to operator error when drag racing. Even with a great drive a manual gives up at least 1/2 second and a few mph to an auto of equal power. Usually its more like a full second and 5+mph.

Interesting. Subbing in to watch. Dyno'ing in 5th? I agree those numbers are low. That setup reads like its good to max out that 66 somewhere around or above 750. The tuning is such that is calling for full fueling? Is it smokey? What are the specs on the 66? At what revs is it making the peak numbers?

 

^Manuals are more rare to dyno poorly. Manuals are also more subject to operator error when drag racing. Even with a great drive a manual gives up at least 1/2 second and a few mph to an auto of equal power. Usually its more like a full second and 5+mph.


Interesting. Subbing in to watch. Dyno'ing in 5th? I agree those numbers are low. That setup reads like its good to max out that 66 somewhere around or above 750. The tuning is such that is calling for full fueling? Is it smokey? What are the specs on the 66? At what revs is it making the peak numbers?

Trap speeds don't usually differ that much. That's a true indication of horsepower. I had a 2.2 60 ft and ran a mid 12 but still trapped 121 at one point.

That does seem a little low. I dynoed 896hp with a 67.7 and 150s on dans diesel performance dyno.

LOL dans diesel performance dyno

6spd or not, track will tell you something.. I just saw. 11.68 fri night at test&tune... It was a dually, with the single tire set up, 6spd.. He trapped at 120mph.....that mph says alot.

See^

It is a dmax pump but I'm only running 9psi lift pump pressure because of the pump. Lift pump is a brand new airdog 165 with 1/2" lines..

Search "quest for 700hp" in this forum it's a build up of my truck.. Lots of problems we have found already and I guess it isn't over yet

I run 17-18 on my dmax top pump and have never had an issue, I actually want to raise it a tad.

 

Does the smoke clean up? I know you were having smoky issues in the past.

 

That does seem a little low. I dynoed 896hp with a 67.7 and 150s on dans diesel performance dyno.

 

It's smokey down low then cleans up on top end, one was a mobile Dyno and today was a loaded Dyno but I may have been blowing thru the brakes.. Dyno graphs are smooth and look good, just low. Two completely diff dynos and exactly the same hp just seems weird unless both aren't loading on top end I guess.. If u have Instagram I have a video of my pull mattlosch17

I was seeing 50-52 psi which I believe is about correct for the 66..

 

Maybe I just need a 467.7 ........

 

And yes 5th gear pulls.. Track times won't really tell me much as it's a 6spd and pretty big...

 

6spd or not, track will tell you something.. I just saw. 11.68 fri night at test&tune... It was a dually, with the single tire set up, 6spd.. He trapped at 120mph.....that mph says alot.

 

I always saw 40-50hp difference on the dyno between 5th and 6th gear.

 

There wasn't much diff between two gears... Only thing I can think of is the "loaded" Dyno wasn't holding under higher hp and I was blowing thru the brakes so essentially both dynos were non load??

 

there wasn't much diff between two gears... Only thing i can think of is the "loaded" dyno wasn't holding under higher hp and i was blowing thru the brakes so essentially both dynos were non load??

what dynos.

Don't expect help when you don't answer questions.

 

First Dyno was Jefferson state mobile Dyno at the Nhrda here in Woodburn Oregon, where les drove my truck on the Dyno.. Second was at DFI performance here in Oregon on a "loaded" Dyno do not know the brand think dynojet? Was super old inground Dyno..

The turbo is a s366? Three years old purchased from manning Motorsports don't remember all the specs on it but believe its a 66/73 .91 t4

 

So first Dyno was at the Nhrda and was a dynojet







Second Dyno was a Dyno dynamics



Truck we are workin with

 

I would chek your airdog...

 

Seems weird that a 66 could clean up 150's on the top end... How's your cp3 supply pressure under full load? What do egt get to at the top end full load?

IMO 150's should be able to melt down a 66 on a hot tune... If not, then it's not getting full fuelling.

 

Honestly never looked at egts on the run, and I'm sure les is having it fuel hard but not for sure on that.. He was even surprised on my numbers

 

Since all the pulls finish at the same peak HP I don't think its dyno loading. What rail pressure and duration is he commanding? I also think knowing EGT's would help. So far its all looking like it just wants more fuel. I know you said you trusted the 150's but maybe they are on the small side of 150?

And dyno's that don't show RPM are super frustrating to me.