anyone have dyno #s????

[sungoesdown]

Did not want to hijack an existing thread, so I will start my own.

Who on here has dyno #s from thier amc engines? Please state model of dyno, elevation, and this is not limited to FSJs but I want AMC only. And what mods were done to get those #s.

[Jeepguy77]

i havent actually had a chance to go to the dyno shop, but I have desktop dyno 2003, and with all the edelbrock performer rpm stuff and 9 to 1 comp it should make around 400 hp and over 400 ft lbs of torque. but i think its more like 360hp and 400ftlbs. i know you probably want chassis dyno results but thats all i got. desk top dyno really helps because here pretty soon im going to be building another 360 with all the parts i tested on desktop dyno, so between 360 and 400 hp is gonna be a real fun truck to drive.

[midmichfsj]

Can't help too much but i should have dyno results for my 401 in about a month.
If it ever gets finished:banghead:

[TPICherokee]

89 Jeep Grand Wagoneer stock 360 100k
Dyno run at or near sea level:

125.4 Horsepower at 3750 RPM
204.8 ft/lbs torque at 2750 RPM

89 Jeep Grand Wagoneer stock 360 with Edelbrock Fuel Injection 105k:
Dyno run at or near sea level:

143.3 Horsepower at 4250 RPM
210.7 ft/lbs torque at 2750 RPM

Drivability, cold starts and fuel mileage, all much better.

[Tornado230]

I do not have this info, but I will try to put you in the right direction.
Go on the "AMC Forum".
Lots of information, probably what you are interested in.
Something on the order of this site, only for AMC.
Also, check out "Performance American Style".

[sungoesdown]

Thanks, TPI, thats exactly where I wanted to start.

Now, anyone have any numbers for a modified 401 yet?

I have desktop dyno, but i was looking for real world numbers, taking in to account of the 727 slushbox and the TC. Can I take into account the normal 15% loss even being 4wd that you would do normal vehicles?

The last motor I rebuilt puts out way over 100 hp per liter, I do not see that happening with American iron, at lease without some juice

[red mistress]

I don't know where all my sheets are, probably in foot thick stack of receipts.:o

Scrambler's 401 with carb on engine stand was 480.

Chassis dyno with 38" tires and 4.56's and Edelbrock MPFI that tuner messed with for 6 hours best pull was 280 rear wheel.

I still remember the open exhaust, all revved up ROAR :eek:
(had to take the supertraps off so the meter would clip on.)

Its got high compression, full roller, balanced, and bench flowed iron heads.

Remember the cam made most torque around 4 grand.

[Ghinmi]

Larry (millerluck) has been on the dyno. He's got a 401 w/edelbrock heads.

If all goes well I'll be able to talk my professor into running my Jeep on the school's dyno. I'm really curious as to what kind of power it makes.

[coiler]

I have juiced up 401 with eddy efi and a whole list of goodies dyno was 368hp at rear wheels 477lbs torque. Finally have everything done drive trainwise and it moves for heavy iron. I have about 12k into the motor alone.

[J4GRAND]

I had the 360 in my J4000 with the mods listed in my signature run through a desktop dyno and it came out slightly above 350HP and 400 ft lbs of torque.

[Elliott]

I have some 401 dyno sheets that were scanned on my home computer I'll post up or email to you when I get them.

[sungoesdown]

thank you

[Millerluck]

Here's my engine build and numbers.

http://mysite.verizon.net/lsjlmiller/401build.htm

http://mysite.verizon.net/lsjlmiller/sheet1.jpg


http://mysite.verizon.net/lsjlmiller/sheet.jpg



http://www.youtube.com/watch?v=lvD76GCuw1M

Larry

[Elliott]

Here's stuff from the AMC Forum:
http://www.fullsizejeeps.com/jeeps/files/Users/Elliott/TX401dyno2n.jpg
AMC 401, 10.5:1 93 octane Indy SR401 heads (only port matched)

Okay, the Indy-head 401 is 10.5:1 compression, gasket matched heads, J&E pistons, stock crank/rods and ARP bolts, 1 3/4" Hookers, and the cam is a SOLID lifter Crower, .498/.509 246/252 @ .050, and 108 lobe sep. Initially, I did all of the tests with 1.6 rockers, but the final tests, and comparison of intakes was with 1.7s. Thus, the camshaft would then effectively lift the valve about .530/.540. That's probably where I should have started....but I didn't! I ran this same motor about 6 months ago with a smaller .477/.485 (240/242) solid. That combo made 423 pk. hp, while this new cam/rocker combo only produced about 23 hp more, but I didn't sacrifice any low end torque. Still, made almost 490 lb/ft with either cam, this bigger one allowed it to rev a bit more. But revving a stock rod 401 more than 6500 rpm seems a bit wasteful to me. Remember, this is going into a 3400 lb Javelin that has 2.73s out back. Oh yeah, it made the numbers on 93 octane pump gas, that's available ANYWHERE in the Dallas area, and a total of 34 degrees of timing. When we dialed in more, the power fell. That's a good sign that the heads are efficient, and not needing more spark lead, I think. Okay, fire away, who will be the first to say, "My desktop dyno says that I make 500 hp...." I can tell you that the desktop dyno was about 60 horsepower optimistic of what my engine made on a real dyno.

Yes, this is engine might be slightly undercammed, especially considering the Indy SR heads, but like I said, pump gas, starts easy, and idled at 900 rpm and held 11" of vaccum. The heads were probably just waking up when the cam had peaked.

klvn8r



Well, I spent the WHOLE day yesterday, running my brand new Indy-head 401 on a REAL dyno. Not a $40 Mr. Gasket desktop version (Yes, I'm becoming a BIG skeptic!), but a real Superflow, water-brake dyno. Here's the combo.

.030 401 with stock crank/rods and ARP bolts, with J&E forged pistons that are built from the Indy head combustion chamber mold. I went with 10.5:1 compression, 1 3/4" headers, RPM Air Gap, 830 Holley, and a Crower solid lifter camshaft. Why the solid lifter?? WEll, just cuz...mainly it was a compromise for power and power brakes. I was thinking the next size up bigger solid (246/252 @ .050 108 LC .498"/.509") would be too big for the street, after yesterday, I don't think so.
Anyhow, here's the numbers you're wanting to hear.

Best peak torque: 489.7 @3900 rpm.
Best horsepower was 423.8 at 5300 rpm.

Incidently, a 1" open spacer picked up over 20 lb/ft and 20-25hp almost all the way across the 3600-6000 rpm pull! That's quite a bit!!!

For the record, my desktop dyno predicted 474 hp, and 494 lb/ft of torque. Interesting that the torque was really close, but the horsepower 'guess' was over 50 hp optimistic. On the other hand, I understand that the dyno my brothers and I use isn't as "optimistic" as many others....

For what its worth...

klvn8r

[Elliott]

1AMX2GO (http://cgi.amcforum.net/cgi-bin/yabb/YaBB.pl?board=Drag;action=viewprofile;username=1AM X2GO)
Anyway, back to the subject, I was the second to make a pull. My car (1969 AMX, 390, TH400, 32" tall Hoosiers) made my best pull in 3rd gear reading 311hp, and 589 torque at the wheels. I was a little dissapointed and was having carb issues fouling plugs.

AMXRalf (http://cgi.amcforum.net/cgi-bin/yabb/YaBB.pl?board=Drag;action=viewprofile;username=AMX Ralf)
Anyway, I got 283.6 through the muffs, and 293.7 with the headers open. Since I only ran 103 or 104 mph and I usually can get 106 or so even with the street tires and 108-111 with a drag radial, I figure the air was pretty much awful.

you gotta love Dynomax super turbos and K&N air filters. 10 hp isn't hardly worth crawling under the car. btw one of the dyno operators opened up my exhaust and put it back up, can't thank 'em enough.

Too bad there were only 3 of us that took advantage of the opportunity. Personally I knew the clutch wouldn't hold up to any more real passes with real tires, so I pretty much took a day off from work just to run on the dyno. I think I was spinning the tires on the dyno, but it spins the tires in third on the street sometimes too.

I'm only a few rwhp shy of those 11 second cars, so I can settle for not busting that 300 number.

While I believe the HP is at least representative, the torque should be equal to the HP at 5250 rpm, and so I don't believe the 606 that the printout said. Can't explain it.

As far as my "setup": tired and loose 390 with trw flattops and about 10.7 to 1 compression. 401 heads with a nice port clean up, stock valves, 236 cfm at .500 lift, Crower 45316 cam with 246/250 at 050 and 500/510 lift. Torker and 800 dp Holley. 1 5/8 $99 headers, T10 4speed, 3.54 AMC 20
Best ET 12.41 best MPH 110.9
ralf

[Elliott]

http://www.bulltear.com/forum/viewtopic.php?t=3283 (http://www.bulltear.com/forum/viewtopic.php?t=3283)
Under “Strokin and AMC 401” AMC Hot Rods section 1-21-2005
radamx
OK what I did was to have the crank offset ground to a small block chevy rod size. 2.100 which took my 401 stroke from 3.68 to 3.825.
then I bought 6 inch chevy rods and custom pistons.
I 1/2 filled the block with block filler and bored it .085 over to 4.250 bore
this gives me 434 cid .
I have heard of useing a 400 piston but I just went with a custom piston to get what I wanted.
you could also grind the crank to 2.00 small journal for more stroke.
I am sure there are 50 different ways to do this .I was just shareing mine
Good luck.
http://memimage.cardomain.net/member_images/11/web/671000-671999/671473_31_full.jpg (http://memimage.cardomain.net/member_images/11/web/671000-671999/671473_31_full.jpg)


I have the engine at the shop right now waiting for dyno time.
duration at .050 is 274-280
kinda big for most but I plan on running a lot of Nitrous
hopeing for 600 ft torque and 750 hp without Nitrous.
*edit
Dyno results

434 Indy 401-1 heads
motor pull

741.6 HP at 7500 rpm
572 ft torque at 5800 rpm

1st stage nitrous 200 hp

942.9 hp at 6800 rpm
851.0 ft torque 5700 rpm

2nd stage nitrous 400 hp

1162 hp at 7300 rpm
1000.8 ft torque at 5800

I think the header size was to big for the best power on the motor but they worked great on the Nitrous

http://memimage.cardomain.net/member_images/11/web/671000-671999/671473_3_full.jpg (http://memimage.cardomain.net/member_images/11/web/671000-671999/671473_3_full.jpg)


http://memimage.cardomain.com//member_images/11/web/671000-671999/671473_3_full.jpg

[Menace]

Did not want to hijack an existing thread, so I will start my own.

Who on here has dyno #s from thier amc engines? Please state model of dyno, elevation, and this is not limited to FSJs but I want AMC only. And what mods were done to get those #s.

Did you want engine dyno numbers or chassis dyno numbers?
:cool:

[sungoesdown]

both actually, I did not want dyno #s of FSJs with chevy or other engines.

Any information is good information for me right now