Dynoed my Car today with catastrophic results.

[4gotn1]

well i dynoed my 90 coupe with ka24e. got one run out of it and then it crapped out. havent figured out what happend but the dyno results were much lower than expected. 130hp @ 6500 and 123ftlbs @ 4700. my torque curve is so flat. its almost at 123ftbls from 3100 to just over 5000. then it drops off slowly. it was dynoed on a mustang dyno. after the run was over, the car stalled. and shot alot of flaming **** out the back end. looked like gasket material. dont know why. but something really bad happened and i think it possibly blew the head gasket, but im going to tear into it and see what happened. if anyone has had a similar problem or might now what caused this then please feel free to chime in.

heres all the power adder i could think of, tell me what you all think:obx header, custom intake kyo exhaust 2.5 in test pipe port matched intake and exhaust magnecore wires beru silverstone plugs msd blaster 2 coil asp underdrive pulley obx adj fuel pressure regulator 300zx fuel filter walboro fuel pump 16in electric fan conversion removed secondary butterfly valves nismo motor mounts nismo transmission mount myth concepts tuned ecu removed ac (complete) myth concepts ground kit exedy stage 1 clutch i am running moble 1 synthetic in engine trann and diff if that makes a difference.

and i will link to the page with the dyno on it because its too large to post up here.

http://www.mythconcepts.com/We...1.jpg

[TheOne]

if the power seems low for ya it could be because a mustang dyno usually yields lower hp than dynojets, guess its on the way of how each does the dyno.

[4gotn1]

i thought i had read that somewhere, but wasent sure. but i do have bigger problems now. fixing it.

[sixxdeuce]

I know its not really necessary on na, but do you have any monitering equiptment for the fuel and ecu mods u have done?

[4gotn1]

i do have an air fuel gauge, but when on the dyno they did have the wideband hooked up. you can see the af graph on the dyno chart. but i am planning on purchasing a wideband myself.

[ArticDragon192]

I produced that much power on a stock KA24DE on a Mustang dyno, so somethign is def wrong.

[4gotn1]

well i just got off work and im tearing thru the engine to see what happened, after a couple of tests of course.

[4gotn1]

wow im amazed, compression was 170 across the board. but i did find the problem. i removed all the unneccasary vacuume lines fromt the intake manifold, and emissions (i love Ky) and one of the holes i plugged up with a bolt. well it seems to have shot out of the manifold, and stripped the hole too. amazing. abosultely amazing. i dont know how it did it but im dumbfounded. so i am swapping to a spare manifold i had laying around. i appreaciate all the help. thanks.

[ArticDragon192]

GL with the engine and keep us updated.

[slipnfall]

Shot out or sucked in? Where was this bolt located??

[NateDogg]

Did you remove your PCV system?

[PalmerWMD]

Between headers intake+ exhaust w/o a ECU reflash you think you were running lean?

[4gotn1]

i had removed my pcv valve and plugged the hole with a bolt i had laying around. that bolt shot out and hit the valve cover at the end of the dyno run. i was running a little lean in the 5-6k range but i have since fixed that. i chipped my ecu and tune it my self. its going pretty good, i have my second manifold port matched allready, secondary butterfly valves have been removed. and im getting ready to install it. but i stopped to get another beer and take a short breather. should be done here in about an hour or so. then some time this week im going to go back and redyno it because i am no where near satisfied with those numbers.

[240ssex]

How do you tune your ka ecu?

[4gotn1]

well i am using live edit and rom editor. i havent descided which i like better, but pretty much i modify the .bin to my likings then burn it to a chip and throw it it and see how it runs. its alot more complicated that i make it out to be. but there are a number of people on here that tune there own ecu's. just search for it.

[NateDogg]

You shoulda kept your PCV valve. The gases inside the engine built up enough to shoot out that bolt, imagine what it's doing to the rings and how they are sealing.

[4gotn1]

i still have it, its just not going back into the intake manifold anymore. so the gases are getting vented to the atmosphere, just not back into the intake manifold.

[S13240]

Kinda funny how you listed all your "power adder" parts and 1/3 of the list is only "power adder" parts. The rest are just upgrades from stock parts that does not yield you any more hp.

130 hp doesn't sound that bad with basic bolt ons and a tuned ecu.

[HaveBlue]

My 1990 automatic dynoed at about 122hp/123tq on a hot day in socal. I/H/E. so 130 is what i would expect with your mods (without solid tuning). Probably leaned out, spit fuel into a hot exhaust, blew up and shot a bolt out the side.

Almost like 'blowing the welds on your intake manifold'. maybe you should get one of those big red lights that say 'danger to manifold'.

nm, just saw it was the PCV valve you plugged not the AIV on the header. still funny though.

[Ni2s4s0aSnX]

sometimes on kas removing the butterfly valves can lower your horsepower. and the aftermarket underdrive pulleys can cause reduction in power on some cars. Also if you have any computer mods, ive seen some computer mods decrease power by 25hp.

[GEO]

hmm.. Maybe the Single overhead cam has something to do with it?

[KAcoupe]

i think the ecu is not tuned correctly and all the stock specs (correct me if im wrong) are at the crank and get the real pully for it UR everything else is a copycat(sry dont mean to bag on you) but hey i was wondering how hard the electric fan was to convert.. and 16' wow that big i thought that i could only fit a 12 in there

[4gotn1]

actually the electric fan was pretty easy. just wired it to come on when the key goes to the on position. works great. and the pulley made a huge difference, just like the ecu did too. the ecu tuning made a 4rwhp difference on a previous dyno session. the stock specks for all 240's are at the rear of the transmission with all acessories running. thats what the fsm says. i actually im putting it back together. i ripped the head off and had a port and polish done, with a 3 angle valve job, and had it decked too. also had the intake manifold fully ported. so im kinda excited to see how it does now. oh and i found out that i do have the eairly 9.0:1 pistons.im going to get a romulator and convert to a standalone. ive been playing with designs for itb manifolds, with a plenum so i could keep a mafs and not have to swap to a map sensor. i will try to get that done sometime over the summer.

also i have had constant problems with the beru plugs cracking in the insulation and cracking the electrodes too. dont get them there crap. right now im running some ngk's and there much better. and i havent had any problems with them yet.

[deviousKA]

Hey 4gotn1, cant wait to hear your new results after you assemble the beast.

I tune the ka24 ecus as well and have been working on a few projects in this area for the last month or so. One project being a NA ka24e version that can be used a variety of ways real time/eprom etc. Anyways I plan to offer a few finished tunes free for download. Would you be interested in testing some of these files or discussing specifics of ka24e tuning?

I am also working on my own realtime edit/view and datalogging system for the ka24e ecus. This system has possibility of maptrace unlike most emulator systems, also will have no large external components. I wouldnt mind sharing my information/development on this system.

[Dattebayo]

NGK's are stock equipment! You didnt know that?

[4gotn1]

yes i did know ngk's are stock. hence why there in there right now. i wanted to try the beru's and ended up they sucked. the only thing i have to do now is find time to put it all together, especially since im trying to get my business up on its own feet. its just consuming my life just about.

deviousKA i would love to. im always up for learning something new.

[Nismo_Freak]

Enrichen the midrange and hang the A/F's around the 13.4:1 range with advanced timing over stock by about 2-3 degrees.