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DYNO Results- Post them here

CobraMarty

CobraMarty

NAXJA Forum User
Location
PM me any questions
Post your rear wheel dyno results.
Give a little info- dyno type, CID, mileage, mods, etc

I'll start-

135rwhp/160rwtq mustang dyno, '99 150k stock

150rwhp/174rwtq mustang dyno, '99 150k CAI, 62mmTB, cat back, ignition

211rwhp/274rwtq mustang dyno, '98 160k sprintex supercharger 6 pounds boost

193rwhp/236rwtq ?dyno, 'Gradon's stroker' from old post, 4.6L, 30cam, ported head

202rwhp/258rwtq ?dyno, 'Cheromaniac's' 4.6L 'poor man's stroker"

220rwhp/260rwtq ?dyno, 'Mountaineer's' 4.0L nitrous

Any others?
 
'89 block, '94 ported head from 505 Performance, medium cam, 99+ intake, adapted and bored RENIX TB, aftermarket header, CAI, no cat, 2.25" exhaust to Cherry Bomb, Ford 19 lb injectors, 210k miles, fresh rebuild. AW4, Mustang Dyno.

134 rwhp/160 lb/ft

Which is I now run a V8. Lighter, double the HP, more than double the torque.
 
CobraMarty said:
202rwhp/258rwtq ?dyno, 'Cheromaniac's' 4.6L 'poor man's stroker"
Click to expand...

'92 XJ Laredo 4-door 4WD with AX15 5-speed manual tranny, NP231, D30 front, D35 rear, 225/70R15 tires

4563cc "poor man's" stroker (+20 thou overbore, 258 crank, 258 rods, 677P pistons, 9.25:1 CR, ported 7120 head, stock cam)

Homebrew CAI, Modified Ford 65mm throttle body, 65-to-62mm tapered TB spacer, '01 XJ intake manifold (injector bosses ported), Thermotec manifold heatshield, IAT sensor relocated to CAI.

Borla header (modified with 3" collector), custom 3"-to-2.5" downpipe, no cat, Flowmaster center muffler, Magnaflow rear muffler, Kolak 2.5" tailpipe with Pacesetter Monza 3" chrome tip.

Clutch fan delete (dual electric fans), Ford 24lb injectors at stock 40psi fuel pressure, homebrew MAP adjuster set at 5.3v, stock ECU.

Dastek load bearing dyno:

HP_TQ.jpg
 
Why do jeep cherokee's feel quick, yet spit out low hp/tq numbers?

My stock 160,000 mile 96' bolt on 2-wheel drive cherokee feels quicker than my bolt-on 93 aod gt convertible with the 5.0 HO. It had shift kit, 3.73's, explorer intake manifold, explorer 4 hole injectors, shorty headers, x pipe, etc...
 
streetxj said:
Why do jeep cherokee's feel quick, yet spit out low hp/tq numbers?

My stock 160,000 mile 96' bolt on 2-wheel drive cherokee feels quicker than my bolt-on 93 aod gt convertible with the 5.0 HO. It had shift kit, 3.73's, explorer intake manifold, explorer 4 hole injectors, shorty headers, x pipe, etc...
Click to expand...

The curb weight of a 2WD is around 3,000 pounds. Passenger vehicles weigh 2,600 to 2,800 pounds on average. The 4.0L puts out about 90% of its torque right off idle.
 
IXNAYXJ said:
Actually, the "low end torque" of the 4.0 is something of a myth.
Click to expand...

My 4.6 stroker produces 89% of maximum torque at only 1500rpm and that isn't a myth. It'll also pull cleanly on a level road from 20mph (600rpm) in 5th gear and easily do a standing start from 3rd gear.
 
Love the flat TQ curve of Dr.Dyno's stroker, 230+TQ from 1500-4500 rpm.

Dr. Dyno's stroker build is pretty close to average max stroker build less cam(he uses stock cam).
5speed, 4563cc, ported head and manifold, 9.25CR, 65mmTB, headers and downpipe, cat back, CAI, heatshield, no cat, stock cam-
Doesn't get much better that this. Nice engine build.
 
Dr. Dyno said:
My 4.6 stroker produces 89% of maximum torque at only 1500rpm and that isn't a myth. It'll also pull cleanly on a level road from 20mph (600rpm) in 5th gear and easily do a standing start from 3rd gear.
Click to expand...
Note I didn't say "stroker," I said 4-liter. Torque peak on a stock H.O. is well into the rev range (3k+). IMHO the only real reason to build a stroker is the significantly increase the tq figure and put it lower in the rev band.
 
IXNAYXJ said:
Note I didn't say "stroker," I said 4-liter. Torque peak on a stock H.O. is well into the rev range (3k+). IMHO the only real reason to build a stroker is the significantly increase the tq figure and put it lower in the rev band.
Click to expand...

I was quoting the 90% figure for a stock 4.0L. The low end torque is not a myth. This dynamometer chart is straight from Chrysler.

curve_40.jpg
 
CobraMarty said:
Dr. Dyno's stroker build is pretty close to average max stroker build less cam(he uses stock cam).
Click to expand...

I used the Crane 753905 in my original build but after 34k miles two lifters and one cam lobe bit the dust. I didn't dyno my stroker with the Crane cam but I estimate it would have put down around 208rwhp/262rwtq.
I lost a little performance after swapping in my old '92 stock cam but since then I clawed back much of the loss by removing the JET Stage 2 chip, swapping in an '01 XJ intake manifold, and revamping my cold air intake with a less restrictive pipe.
My stroker has now done 72k miles and still runs like a champ.
 
Alexia said:
The curb weight of a 2WD is around 3,000 pounds. Passenger vehicles weigh 2,600 to 2,800 pounds on average. The 4.0L puts out about 90% of its torque right off idle.
Click to expand...

That probably explains the "much quicker" feeling. The stock aod mustang transmission has a 1600 rpm stall converter on an engine that has a peak torque at 3000-3200 rpms.... So that doesn't help either in take off. The jeep Aw4 transmission has a 2500 rpm stall converter, so it is much closer to peak torque. According to my vin #, my truck weighs 2905 lbs. :)
 
Dr. Dyno said:
I used the Crane 753905 in my original build but after 34k miles two lifters and one cam lobe bit the dust. I didn't dyno my stroker with the Crane cam but I estimate it would have put down around 208rwhp/262rwtq.
I lost a little performance after swapping in my old '92 stock cam but since then I clawed back much of the loss by removing the JET Stage 2 chip, swapping in an '01 XJ intake manifold, and revamping my cold air intake with a less restrictive pipe.
My stroker has now done 72k miles and still runs like a champ.
Click to expand...

Cool. :) Have you tried running a factory dual ratio cam from a 96-98 4.0 with 1.7 rockers? Those have a lower peak torque and a broader torque band than the 91-95 single pattern cams.
 
That would have been a nice idea except that I already had my original '92 cam as a spare so I chose to reuse it rather than buy a new '96-'98 cam. I also already had the 1.6 ratio "yellow terrors".
 
325hp@5300/363tq@4100 engine dyno, ?4.9L, fully ported BV head, 470 carb, stock Clifford intake, Newcomer Racing

361hp@5400/377tq@4800 engine dyno, ?4.9L, fully ported BV head, bigger carb, intake and headers, Newcomer Racing

?253rwhp/?283rwtq -22% drivetrain loss, projected on above 325hp/363tq engine
 
240k 4.0L
T3/T4 turbo 6 psi tapering to 3-4 psi by redline (boost leak)
36 lbs injectors
99+ intake
way too small intercooler and piping
recycled scrap metal 2.5" downpipe and exhaust

201hp / 263tq

IMAG0652.jpg


You can see where the boost starts to taper off after 3500 RPM. Also it starts spooling at 1700 RPM but the transmission would downshift so we couldn't get a clean pull. At least it gave us some numbers to go by and improve upon.
 
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142rwhp/187rwtq Dynojet, 4.0 Wrangler, stock
151rwhp/183rwtq Dynojet, 4.0 Wrangler, NO air intake tube or filter-unrestricted--open TB(+9hp/-4tq)

144rwhp/175rwtq '97 ZJ 4.0

148rwhp@4700/187rwtq@3100 Land+Sea Dyno, '01 WJ 4.0 106k, K+N FIPK, HF cat, flowmaster

163rwhp/190rwtq Dynojet K+N Company Test, '97 XJ AW4 2WD 60k 2nd gear
171rwhp/199rwtq Dynojet K+N Company Test, +FIPK (+7.9hp/+9.19tq)

156rwhp/202rwtq ?Dynojet '00 TJ 31"
177rwhp/232rwtq ?Dynojet '00 TJ 31" + 62TB, CAI, EDGE Trail Jammer module (+21hp/+30tq)
 
153rwhp/200rwtq Dynojet '00 TJ 5sp MagnumPowers
250rwhp/305rwtq Dynojet '00 TJ 5sp MagnumPowers M90 SC, 85mmTB, water IC, 10-11 psi boost
358rwhp/450rwtq Dynojet '00 TJ 5sp MagnumPowers M90 SC, 85TP, water IC, 20-21 psi boost
 
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