There were 16 runs total these are the ones that I was able to video. The truck is a 1990 Ford F250, 7.3 non turbo IDI diesel, Straight piped with stacks, Banks Power Pack Air Cleaner lid, K&N air filter, rebuilt injection pump with 4200 rpm rev limit, BB code injectors, E4OD trans with B&M shift improver kit, Mobile 1 synthetic trans fluid. The best run yielded 149.66 Hp, no torque was able to be tested.
@seawalkersee Great. I? need to port the 6. 9 heads I have laying around. Where is the intake and exhaust runners thinnest.
Sorry about the delay in posting a response to your question? about the ported heads. When it is timed correctly, it is smooth as silk. There is great power at part throttole all the way out. My tach does not work so I can’t tell you where it starts to pick up. But, compared to the stocker, the cam, IP, and ported heads are well worth it.
@tpvalley that’s what? I was getting at.
@Th35ac
thing is if its making said power then the ford figures must be at? flywheel.
@Th35ac Sorry but the emissions sticker on the? drivers side valve cover says 185hp. The 6. 9’s had 170hp mines a 7. 3 NA
@tpvalley yes, i understand that, but 1972 and up, the hp and torque are measured at the rear wheels, not at the flywheel. it should be 170 rwhp, which would be about 190 to 200 fly wheel? hp
@dieselgaint stock specs for these motors at the rear wheels? is around 175ish hp. unless the motor’s in need of a tune up, then it should be kicking around that.
@Th35ac
150bhp from a 170bhp engine is about right- 20bhp? loss in trans is good.
the bhp figure is low due to the engines revving so low as bhp = rpm X torque/ constant.
It will have good torque.
@Th35ac but figure drive train lose especially through an E40D. The general rule for an auto trans is 30% friction lose from the engine to the rear wheels. ?
@tpvalley they couldn’t test it cuz it? was off the charts hahaha. 150hp seems way low for even these motors. something’s up with that dyno if it says you’re only kicking 150hp. . .
not according to dyno jet
?
he couldnt test the torque?!!
bhp is calculated from torque!
bhp=torque? X rpm/constant.
@Trashjack101
u know ford made a turbo idi?
it had only 10bhp extra and 30lbft more!
banks also made/make one.
I believe there r lower compression marine pistons available to match? also.
sounds like a fucking harley when he mashes? it
@Trashjack101 Yup, but their pricey if you want a? new one.
Do they make turbo kits? for this?
@2009jee but take a 30% friction loss through the power train and i? have about 195 at the crank
is that a 6. 9 or 7. 3 bc the? non turboed 7. 3s make 185 hp stock somethin like that so somethin deff. aint right
@seawalkersee How did the? porting work for ya. I really thinking about getting a better cam, really like to see how it affects a non turbo.
I know the springs are weak. I ported my heads and was surprised to see what they were when I pulled? them. I just wonder why you raised the rpms. Im not trying to set any records with mine, just want to be able to tow a few loads till I shell my 9” (it in a bronco). I like it though. Have you stepped up and got a better cam yet?
@seawalkersee It makes the Horsepower curve higher instead of falling off at 3300rpm it falls of at 4000ish. I can’t stress this enough above 4000rpms you can have valve float which isin’t good, so you would need to install stronger valve springs. I have not exsperenced valve float but I know I’m pushing it with stock valve springs. ?
That winds? up pretty good. Why did you raise your rpms? I just had my IP rebuilt and should have it back within the week. . . Like the way yours sounds.
@arockyway2go? I called and talked to Dyno Jet and asked if not having a rpm input would mess up the final hp numbers and i talked to TWO tech personel and they both said NO IT WON’T. Yea all chassie dyno’s have there own tach pickups but this these people didn’t have the opptional Crank tachometer pickup. Remeber this is a diesel no spark.
ALL chassis dynos have their own tach pick-up. Thats how they measure the rate of acceleration,has nothing to do with any thing else. Ratings? being measured will be “uncorrected” because of this but will still be measured. With some kind of engine signal ie: injector pulse adapter. Then a corrected (actual) hp/torque rating can’t be achieved. I’ve been the chassis dyno oper for Roush/Fenway Racing for the last 12yrs so I know how they work. Those are uncorrected and invalid numbers.
@arockyway2go That may be true with other dynos but most dynos need an RPM signal thrown into the equation, since my trucks a diesel you have no spark, the other method is a crank position sensor that you put on the Harmonic Balancer and the computer can then pick? up a signal and calculate torque from the rate of accel/decel and RPM