modified 502mpi intake on 502 dyno session at my shop
02-11-2016, 07:18 PM
#121
Registered
Join Date: Mar 2004
Location: Denver, NC
Posts: 65
Likes: 0
Received 0 Likes
on
0 Posts
Cam is Isky custom grind 244/252 114 Lobe center .632/.632, Heads are dart pro1 325 with 2.3 intake and 1.89 exhaust, Compression not sure, maybe 9.8 to 1, Stock injectors with 45 psi fuel pressure, Lower all new with scat crank and srp pistons, Stock ignition at 32 degrees final advance, MEFI3, dyno with all accessories vortech intake with filter and dry headers, torque was 676 at 4400
Hope this helped.
02-11-2016, 07:44 PM
#122
Registered
iTrader: (3)
I will share what I know:
Cam is Isky custom grind 244/252 114 Lobe center .632/.632, Heads are dart pro1 325 with 2.3 intake and 1.89 exhaust, Compression not sure, maybe 9.8 to 1, Stock injectors with 45 psi fuel pressure, Lower all new with scat crank and srp pistons, Stock ignition at 32 degrees final advance, MEFI3, dyno with all accessories vortech intake with filter and dry headers, torque was 676 at 4400
Hope this helped.
Cam is Isky custom grind 244/252 114 Lobe center .632/.632, Heads are dart pro1 325 with 2.3 intake and 1.89 exhaust, Compression not sure, maybe 9.8 to 1, Stock injectors with 45 psi fuel pressure, Lower all new with scat crank and srp pistons, Stock ignition at 32 degrees final advance, MEFI3, dyno with all accessories vortech intake with filter and dry headers, torque was 676 at 4400
Hope this helped.
02-11-2016, 08:58 PM
#124
Platinum Member
Platinum Member
Continued my dyno testing 2 days ago, made baseline pull, motor made 536 hp for my baseline pull, bolted on just the adapter for the "rex marine" flame arrestor, now i was previously referring to this as the AZSM as the guy I borrowed it from bought it from AZSM about 10 years ago (they used to sell it but no longer do) (hardin, rex marine etc still do) and it made WORSE hp without the KN element and drove map table from the 100 map table (was seeing 98.5 map) down to the 90 map table (with JUST adapter it causes so much restriction we saw 91.5 map on scanner pro/mefiburn in real time above 4500 rpms) . This leaned motor out so bad hp dropped to 485 and tq dropped 40+ ft lbs, a 51hp drop. I re-wrote the fuel tables in the 90 map area to get afrs back to where it made peak power, with same afrs on tq peak the tq was down 20 ft lbs or so, was getting the hp peak afrs close and got hp up to 505 and at that point the tach signal generator for the depac started faltering and had to end dynoing until I get a new one. So, the BIG restriction with this flame arrestor appears to be more in the adapter than the area of the element. I was REALLY trying to wring out as much hp with just adapter on because I recently bought a hp 500 intake for my NEXT project and the hp 500 kn element is 30% smaller than the hp killing one that goes with this adapter and I can use it to mount the hp 500 kn on and see how bad IT is. The test however will probably NOT be valid since the adapter is already causing so much restriction. I will probably build;d a temporary sheet metal cone to mount it for testing, I will post results when dyno is back up and running, Smitty
02-12-2016, 11:06 AM
#125
Platinum Member
Platinum MemberThread Starter
iTrader: (1)
For 500efi? Thats what I'm building next I would love to get my hands on one and test it as I can plainly see the stock on this terribly restrictive and the Hardin marine one is four or $500 for their nice one
02-12-2016, 11:19 AM
#126
Platinum Member
Platinum Member
E mail and pics sent.
02-13-2016, 06:20 PM
#127
Platinum Member
Platinum MemberThread Starter
iTrader: (1)
Dynoed again today, sometimes things defy logic and what you would ever expect. Made baseline pull, saw 535 hp with 1.007 correction factor so observed vs corrected there was no difference, air conditions pretty much perfect. Never got motor past 505 hp w rex marine flame arrestor adapter, really wanted to use it to adapt on the 500efi FA BUT if it kills that much hp on its own no reason to bother going forward w anymore testing with it on, going to make a sheet metal cone adapter to use 500 efi FA. Ran out of fuel (shell 89), motor makes 3 to 5 hp MORE consistently w shell 89 than shell 93 even IF you give it more timing. Was waiting on customers to stop by shop so couldnt leave, got 5 gallons of Sunoco 93 out of snowmobile trailer, in sealed jug, 2 weeks old. Motor immediately made 525 hp (10 LESS) , remind me NOT to buy Sunoco gas! So other than adapting 500efi FA on for testing, tuning some 80/90 map tables and testing measured timing w dui module to see why it loses 20 hp just about done. Figured it would be a good time to test the taylor 10.5 mm wires that i mentioned earlier having bad resistance readings, fired motor up after installing them, just so happens the one w 24,000,000 ohms ends up on cyl that has my innovate o2 sensor, it immediately goes between 17 to 18 -1, motors sputtering and running like crap, made pull anyways. Expected to see 480 hp, o2 sensor clears up, motor makes 527 hp and 3 more ft lbs of tq, WTF! Pulled wites back off, bad one STILL consistently measures 24,000,000 ohms, 2nd worst one stll resds 3 to 4 million, cant believe under power they can work fine!!
02-14-2016, 07:37 AM
#129
Platinum Member
Platinum MemberThread Starter
iTrader: (1)
The old taylor 10.5s i had on my 540 tested fukked up, 24 mol ohms on one, 3mil on another, 80k on 3rd, rest were good . Thought was going to see a big drop putting them on as a test, motor sputtered but pulled same at wot, go figure, wtf!
