Dyno Results, 4.6 Super-Stroker
09-25-2014, 12:26 PM
#46
09-25-2014, 02:40 PM
#47
CF Veteran
Thread Starter
It's rough guestimation from equations and it's obviously not WHP.
The meth injection isn't spraying for some reason so pickup is being delayed until further notice.
I just asked what the results were and he said 200 at the wheels which seems off to me. He also said it was making 3 PSI. I'm going to get the actual cylinder compression numbers tomorrow. The guy working on it yesterday had today off. I sense there is still open valve'ry with those numbers.
The meth injection isn't spraying for some reason so pickup is being delayed until further notice.
I just asked what the results were and he said 200 at the wheels which seems off to me. He also said it was making 3 PSI. I'm going to get the actual cylinder compression numbers tomorrow. The guy working on it yesterday had today off. I sense there is still open valve'ry with those numbers.
09-25-2014, 02:45 PM
#48
CF Veteran
Thread Starter
It's rough guestimation from equations and it's obviously not WHP.
The meth injection isn't spraying for some reason so pickup is being delayed until further notice.
I just asked what the results were and he said 200 at the wheels which seems off to me. He also said it was making 3 PSI. I'm going to get the actual cylinder compression numbers tomorrow. The guy working on it yesterday had today off. I sense there is still open valve'ry with those numbers.
The meth injection isn't spraying for some reason so pickup is being delayed until further notice.
I just asked what the results were and he said 200 at the wheels which seems off to me. He also said it was making 3 PSI. I'm going to get the actual cylinder compression numbers tomorrow. The guy working on it yesterday had today off. I sense there is still open valve'ry with those numbers.
I'm also running 34"x12.5" ish tires so I'm sure that's not helping. It's also an automatic transmission so it's not going to be as high as if it was a manual. He also mentioned because it was an automatic it was hard to get it to stay in gear because of the way it shifted. I don't understand dyno procedures so that's foreign to me.
09-25-2014, 03:04 PM
#49
THE Admin
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 34,036
Received 231 Likes
on
187 Posts
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Mine was off of RWP. Things like fluid viscosity can help alleviate some parasitic loss in the drivetrain. Also my clutch packs and solenoids in the AW4 were upgraded to minimize the natural slippage that normally occurs.
09-25-2014, 03:14 PM
#50
CF Veteran
Join Date: Dec 2011
Location: PA KOTUFU!
Posts: 1,777
Likes: 0
Received 16 Likes
on
15 Posts
Year: 1998
Engine: 4.0L 162,000
Yeah, the auto needs to be locked in a gear to be able to dyno well. I modified my TCU to shift 1-2-3 and hold in each gear. That is what is needed to dyno. Other is to unplug the TCU and it will just stay in gear and not shift. I forget if it stays in 2nd or 3rd.
What was the TQ?
What was the TQ?
09-25-2014, 03:19 PM
#51
CF Veteran
Join Date: Dec 2011
Location: PA KOTUFU!
Posts: 1,777
Likes: 0
Received 16 Likes
on
15 Posts
Year: 1998
Engine: 4.0L 162,000
Predictions-
I have only seen dyno results on 3 strokers. 2-4.6L, 1-5.0L. All 3 were 5 speeds and built with cam and head porting, etc.
The AW-4 auto zaps an additional 5% drivetrain loss.
193rwhp/236rwtq 4.6L 5 speed 2WD ?dyno
202rwhp/258rwtq 4.6L 5 speed 4WD Dastec dyno
208rwhp/280rwtq 5.0L 5 speed 4WD Mustang dyno
expect 10-12 hp and tq less due to the auto trans.
So N/A 4.6L cam head headers exhaust Auto 4WD-
expect 180-185rwhp and 225-235rwtq which is about 253-260HP/317-330TQ at the crank
Not bad considering stock is 135rwhp/170rwtq and rated 190HP/225TQ crank
Sprintex Supercharged- (if charged air temps are less than 170*)
4 pounds boost +20% 218rwhp/276rwtq (307HP/384TQ crank)
6 pounds boost +30% 236rwhp/299rwtq (333HP/416TQ crank)
-the 20% and 30% are conservative numbers
Can't wait to see the actual dyno results.
I have only seen dyno results on 3 strokers. 2-4.6L, 1-5.0L. All 3 were 5 speeds and built with cam and head porting, etc.
The AW-4 auto zaps an additional 5% drivetrain loss.
193rwhp/236rwtq 4.6L 5 speed 2WD ?dyno
202rwhp/258rwtq 4.6L 5 speed 4WD Dastec dyno
208rwhp/280rwtq 5.0L 5 speed 4WD Mustang dyno
expect 10-12 hp and tq less due to the auto trans.
So N/A 4.6L cam head headers exhaust Auto 4WD-
expect 180-185rwhp and 225-235rwtq which is about 253-260HP/317-330TQ at the crank
Not bad considering stock is 135rwhp/170rwtq and rated 190HP/225TQ crank
Sprintex Supercharged- (if charged air temps are less than 170*)
4 pounds boost +20% 218rwhp/276rwtq (307HP/384TQ crank)
6 pounds boost +30% 236rwhp/299rwtq (333HP/416TQ crank)
-the 20% and 30% are conservative numbers
Can't wait to see the actual dyno results.
With 34" x 12.5" heavy tires and stock trans and no meth or 7th injector to cool IAT and 200 rwhp is pretty close.
What Throttle Body are you running?
Last edited by CobraMarty; 09-25-2014 at 03:22 PM.
09-25-2014, 03:21 PM
#52
THE Admin
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 34,036
Received 231 Likes
on
187 Posts
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Also go find an 80's model MKIII Supra with the AW 30-60 auto transmission and grab it's shift solenoids. The AW30-60 is identical to the AW30-40 (AW4) found in our Xjs internally except thicker/stronger clutches, steels and larger shift solenoids which hold more line pressure than the AW4s.
09-25-2014, 03:58 PM
#53
CF Veteran
Thread Starter
Yeah, the auto needs to be locked in a gear to be able to dyno well. I modified my TCU to shift 1-2-3 and hold in each gear. That is what is needed to dyno. Other is to unplug the TCU and it will just stay in gear and not shift. I forget if it stays in 2nd or 3rd.
What was the TQ?
What was the TQ?
09-25-2014, 04:00 PM
#55
CF Veteran
Thread Starter
09-25-2014, 04:00 PM
#56
CF Veteran
Thread Starter
09-25-2014, 05:51 PM
#58
CF Veteran
Join Date: Dec 2011
Location: PA KOTUFU!
Posts: 1,777
Likes: 0
Received 16 Likes
on
15 Posts
Year: 1998
Engine: 4.0L 162,000
I'm crying!!
Guys with stock 4.0s put bored 62mm TBs for more performance.
You have 15% more displacement and a slightly more cam and the supercharger. You've spent $1000s on the stroker longblock, sprintex supercharger, meth injection and labor. Please spend an additional $100 and get a 62mm bored TB.Your IATs will go down, your boost and power will go up. $400 on a 70mm F+B would be better but then you would have to port the housing under the TB which requires taking the SC off the motor.
Interesting that my predicted 207rwhp vs. your actual 200rwhp is 3.5% difference. That can be due to a 35* higher charge IAT because you don't have the meth working yet or the 7th injector.
Please before you put on a smaller SC pulley, put on a larger TB and get the meth working.
I would predict +1 pound more boost (3 to 4) with a 62mm TB and your current set up and +2 pound more boost (3 to 5) with your current set up and the 70mm TB.
Guys with stock 4.0s put bored 62mm TBs for more performance.
You have 15% more displacement and a slightly more cam and the supercharger. You've spent $1000s on the stroker longblock, sprintex supercharger, meth injection and labor. Please spend an additional $100 and get a 62mm bored TB.Your IATs will go down, your boost and power will go up. $400 on a 70mm F+B would be better but then you would have to port the housing under the TB which requires taking the SC off the motor.
Interesting that my predicted 207rwhp vs. your actual 200rwhp is 3.5% difference. That can be due to a 35* higher charge IAT because you don't have the meth working yet or the 7th injector.
Please before you put on a smaller SC pulley, put on a larger TB and get the meth working.
I would predict +1 pound more boost (3 to 4) with a 62mm TB and your current set up and +2 pound more boost (3 to 5) with your current set up and the 70mm TB.
09-25-2014, 08:45 PM
#60
CF Veteran
Thread Starter
I'm crying!!
Guys with stock 4.0s put bored 62mm TBs for more performance.
You have 15% more displacement and a slightly more cam and the supercharger. You've spent $1000s on the stroker longblock, sprintex supercharger, meth injection and labor. Please spend an additional $100 and get a 62mm bored TB.Your IATs will go down, your boost and power will go up. $400 on a 70mm F+B would be better but then you would have to port the housing under the TB which requires taking the SC off the motor.
Interesting that my predicted 207rwhp vs. your actual 200rwhp is 3.5% difference. That can be due to a 35* higher charge IAT because you don't have the meth working yet or the 7th injector.
Please before you put on a smaller SC pulley, put on a larger TB and get the meth working.
I would predict +1 pound more boost (3 to 4) with a 62mm TB and your current set up and +2 pound more boost (3 to 5) with your current set up and the 70mm TB.
Guys with stock 4.0s put bored 62mm TBs for more performance.
You have 15% more displacement and a slightly more cam and the supercharger. You've spent $1000s on the stroker longblock, sprintex supercharger, meth injection and labor. Please spend an additional $100 and get a 62mm bored TB.Your IATs will go down, your boost and power will go up. $400 on a 70mm F+B would be better but then you would have to port the housing under the TB which requires taking the SC off the motor.
Interesting that my predicted 207rwhp vs. your actual 200rwhp is 3.5% difference. That can be due to a 35* higher charge IAT because you don't have the meth working yet or the 7th injector.
Please before you put on a smaller SC pulley, put on a larger TB and get the meth working.
I would predict +1 pound more boost (3 to 4) with a 62mm TB and your current set up and +2 pound more boost (3 to 5) with your current set up and the 70mm TB.
I would prefer not having to do any modifications to it.