My 410 Magnum on the engine dyno

Posted By: onebaddakota

My 410 Magnum on the engine dyno - 05/23/12 11:13 PM

I'm heading to the dyno. This a 40 over magnum 360 with 4" forged crank,H beams, and flat tops. It retains the factory hydr. roller setup. The cam is a racer brown 248/252@50 with 608 lift. Compression came in at 11.8:1. Carb is a 950hp.It's also on E85. Intake is a ported M1 with a fully ported eddy magnum that flows 290s at 600 lift. Headers are a little bit of a compromise. They are a midlength with 1 3/4 primary and 3" collector. The cam is a little bit out there for the factory hydraulic roller stuff. I don't know of anyone running that much lift on a magnum set up. To control it, I'm running a nitrided PAC beehive with titanium retainer and a stud girdle.It's on the racier side for a magnum to be sure. I don't know really know what to expect.There's just not a ton of info on magnums with this type of build.
Place your bets boys!

Posted By: wldtm

Re: My 410 Magnum on the engine dyno - 05/24/12 01:25 AM

about 530hp I am guessing!

Posted By: Triple Threat

Re: My 410 Magnum on the engine dyno - 05/24/12 07:02 AM

545hp

How does this compare to the old engine combo that put down the times in your sig?

Posted By: Guitar Jones

Re: My 410 Magnum on the engine dyno - 05/24/12 11:17 AM

563hp/577tq

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/24/12 02:42 PM

Quote:

545hp

How does this compare to the old engine combo that put down the times in your sig?

I never dynoed it, Dustin, so I have no idea.

Posted By: Sick 660r

Re: My 410 Magnum on the engine dyno - 05/24/12 02:45 PM

I'll take a guess. 594 with a dominator

Posted By: MR_P_BODY

Re: My 410 Magnum on the engine dyno - 05/24/12 03:12 PM

530 hp... are you going to dyno it

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/24/12 04:02 PM

Quote:

I'll take a guess. 594 with a dominator

You funny

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/24/12 04:09 PM

I didn't really know what to expect with this motor as some of it is a bit unproven. Would I have a stable valve train to 6500? How bad would the heads and hyd roller hold me back?
Well we get it warmed and start loading it up and seems a little rich we pull 3 jets and make our first clean pull to 6300rpm. 555 Hp I'm happy with that. I was hoping for 550HP after all was said and done. The motor liked 34 degrees.
We were now on to carb spacers. I was prepared to be unimpressed. We put a 1" super sucker 4 hole. We let her buck and were stunned to see: 582HP@6300 and 532 TQ@ 5300
The dyno shop says he sees that type of gain about once a year. He theorized that it was a fuel distribution problem given the extra volume needed to run E85.
We threw a dominator on just for fun and made 594HP!!Tq went up to 543@5300
Ron told me to throw some real headers on for an easy 600+.
I am blown away by those numbers. Myself and the others were pretty sure it wouldn't make over 550. Does this sound right to you guys? Did the E85 pick me up that much?
I asked Ron at R and R about his dyno-whether it was a "happy dyno" or not. He told me he dynos more motors than anyone in the midwest and if anything; it's stingy! I guess will see when it slips into the truck.

Posted By: RobX4406

Re: My 410 Magnum on the engine dyno - 05/24/12 05:25 PM

Yep, those hyd rollers don't work...

Nice job, hope it runs as good as the dyno numbers show.

Maybe a 1 3/4-1 7/8 step, 35-36" and 3.5 collector might work well. Straight 1 7/8", same lengths and collector would be pretty good too.

Posted By: Red440

Re: My 410 Magnum on the engine dyno - 05/24/12 05:26 PM

That is some very nice #'s you should be Happy !

I will bet you are ready to bolt it in the Dakota. Are you going to have to make any converter and gear changes ? Nice combo, good luck.

Posted By: Wedgeman

Re: My 410 Magnum on the engine dyno - 05/24/12 06:02 PM

Good show !!!!

Posted By: 65signet

Re: My 410 Magnum on the engine dyno - 05/24/12 06:07 PM

I like it! very nice

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/24/12 10:48 PM

Quote:

That is some very nice #'s you should be Happy ! I will bet you are ready to bolt it in the Dakota. Are you going to have to make any converter and gear changes ? Nice combo, good luck.

I run an ATI treemaster 8" with a 4400 stall. It should do nicely with this combo. I run the stock 3.92 gears and 8 1/4 axle. It's the same unit that came in the truck in 92. I just can't kill it. I think things are a changing though.

Posted By: Triple Threat

Re: My 410 Magnum on the engine dyno - 05/25/12 12:12 AM

I'm impressed. What does the truck weigh and what was the old engine combo?

Posted By: fishy340

Re: My 410 Magnum on the engine dyno - 05/25/12 12:56 AM

nice little pc

Posted By: toddd

Re: My 410 Magnum on the engine dyno - 05/25/12 01:53 AM

Good results!.

Can't wait to see the time slips.

Posted By: gregsdart

Re: My 410 Magnum on the engine dyno - 05/25/12 02:47 AM

Very good numbers! I am sure it will run as strong as the numbers show.

Posted By: 1967dartgt

Re: My 410 Magnum on the engine dyno - 05/25/12 03:07 AM

Wow nice numbers. Good luck with it.

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/25/12 04:29 AM

Quote:

I'm impressed. What does the truck weigh and what was the old engine combo?

With me in it about 3400lbs. The old combo was a 408 with the same heads,intake, and carb. cam was 236/242 with 579 lift. Compression was 10.0 with dished pistons. Best time in sig. It was probably a 500 HP motor, give or take a few.

Posted By: onebaddakota

Re: My 410 Magnum on the engine dyno - 05/25/12 04:37 AM

I got the carb done and at www.classicmtrsprts.com. Great service, btw. We needed very little tuning. They claim they typically see 3-5% increase on a NA setup. Frankly, I thought that was BS for a NA setup. But given my numbers, maybe it was a legit claim. Are any of you E85 users seeing those type of increases from switching over?

Posted By: 1967dartgt

Re: My 410 Magnum on the engine dyno - 05/25/12 01:38 PM

I see a tenth difference between my e85 carb and my c16 race gas carb.

Posted By: 440charger500

Re: My 410 Magnum on the engine dyno - 05/26/12 06:43 AM

Very nice numbers reading this makes me want to build a stroker out of that old 360 sitting in my garage.