Hitting the dyno next week.. predictions?

[ZiG]

I hate to make a 'what will it make' thread, but I'm curious and I have heard a pretty wide range of guesses. I'm hoping for low 200s. Some people say I will be lucky to make 180, some say I will be over 250.

rebuilt 93 ka (stock rebuild)SR t25 'stock wg' - seems to like to hit 10 psisr injectors, cleaned and flowedz32 fuel filterwalbro 2551 step colder plugssr smic (good for keeping boost at high RPMS?)3" zorstmegasquirt full standalone ECUssac tubular mani

etc.

I figure if a stock SR is 200hp, and I am using its own turbo on an engine that's slightly bigger, plus the mods like intake exhaust and custom tune, I should be able to pull out a little ahead, no?

[icnuthin]

i have almost the same stuff. im hitting 220. but i dont know about the smic. let me know what you do and on the 27th ill let you know what i do.

[boznuttz]

The stock wastegate is set at 7 psi.

[ZiG]

I know. After talking to some guys in my local club, it seems that creping up to 10 or so is commonplace though. So I dont really know what to say about it.

[bruinbear714]

My guess is 210rwhp and about 230tq.

[neverlift]

lol you may save me a trip to the dyno... basically same setup, x the 370's though. and squirt, but on custom ecu setupIDK honestly your looking for 200chp min(at 7), may sneak out with 220whp thats due to rebuild. let us know though be nice to see some dynos with m/s setup

[ZiG]

Yeah, the thing still has 190 psi across the board so I'm feeling pretty good about it. Apparently the fact that I have a SMIC will help me maintain max boost into higher rpm, so I guess that's good.

[neverlift]

let me put it to you like this, mine has a few small boost leaks I sealed with rtv, holds 10psi easy feels like to redline anyways. 7k limit.

[eazye2000]

I hope it exceeds your expectations!

It should do pretty good considering you are boosting an already high compression motor. Just watch the knock and adjust your timing accordingly through the MS.

Sometimes I feel like I digest food faster than my car can go from 0-60 mph..

[ZiG]

hah, yeah, well on one hand smic = easier detonation, but on the other hand, knock light for the win!

I was talking with the guys at the place I am taking it, and it turns out they've done 2 other megasquirted 240s within the past 6 months. I mentioned that bit about the SMIC to them and they said "KAs dont seem to need a lot of timing to make good power", I guess that's a relief. And looking at the stock timing map, I'm inclined to agree.

[gaehrings13]

Im running 9psi on 480cc but on a much larger turbo (t04e .69 rear housing) Safc 2. I made 256 hp 249tq. Slipping clutch, old ignition wires. I have the clutching running a little better but it won't hold third gear, but the car feels great.

I think you will be close to those numbers though because you can play with timing a little more. Im going with rom tune on my computer and have the ignition tuned a little more so I can run 12psi. I could probably run more but I don't want to really push it. I'm planning on building the motor in the future and I don't want to ruin this one lol, well if I get a replacement one then I wont care lol.

[Florida240sx]

234/226

[gaehrings13]

Jebus when are you going lol, I want to know what you made on that setup.

[Jookmasta]

228rwhp/232 torque..............

[ZiG]

Jebus when are you going lol, I want to know what you made on that setup.

Tuesday.

[gaehrings13]

Dang, lol thats a long wait. I'll try to be patient.

[ZiG]

Ok, the wait is over:



My best run was 170 whp. This is on a mustang dyno, which I'm told reads a lot lower than others. :S

It was funny, because there was another guy there who had the same setup as me, except he had a full FMIC, stage 2 cams and a fully built bottom end, he put down 180. haha.

[gaehrings13]

How many lbs was this. I think sr's sometime pull the same amount or around it. I really thought you would be over 200hp. I dynoed my car on a dynojet, i think lol it was one of those in the ground..

[ZiG]

Yeah, they said it would read as about 190-200 on a dynojet.

Stock wastegate, 7.2 psi.

Had to pull a LOT of timing though, stupid smic...

[Florida240sx]

So it stayed at 7psi??

[ZiG]

Yup. I guess it was only spiking before because of a bad tune? In any case it stopped, so I'm happy.

[Florida240sx]

This dyno#'s seem so wrong... Something is not adding up. What does the timing map look like? Seems very conservative....

[neverlift]

too bad I'm broke right now or I would dyno my sr smic and t25 on a tired ka. I think your timing must be real conservative how much time you run at wit 7psi, here is a hint I'm using 20* for 8 in florida without ait sensor or knock sensor no knock or the 700miles would have killed it. plugs a tad hot but good.

also why are your afr so chopy where is your smic I know I'm getting good performance for what it is with my bumper here is a pic for ref.

did you water it down or something before the run(s)?

[ZiG]

Well they said that it seemed like the motor seemed more prone to knock than most, and they didn't really know why. I'll post my map when I get home.

We did water down the intercooler a bit, yeah. We did like 8 runs and it was starting to get pretty hot.

As for the AFRs I think them looking choppy was kind of an optical illusion. If you look at the bottom there, you see that the min was 11.2 and the max was 11.9 so I think they're ok.

And I am running colder plugs, too...

They said that 170 whp on their mustang dyno was about equivalent to 190 on a dynojet though.

[neverlift]

hhmmmmmm IDK without seeing you map.but if they pulled aLOT from your map and it was a tune you made for boost(I assume cause your on ms you have a clue as to boost timing) you have a problem. I could see a * or so...

after 8 runs(with tuning in between) I would have expected more. I need to get some cash up so I can hit the dyno, just for a "base line" for future upgrades. what engine temps were you at on best run? were they using their knock monitor or yours? is yours too sensitive by any chances? just thoughts here, pistons have any blemishes or knicks? Something is up is what I'm getting at here.. cause I'm not seeign the break up from knock on your chart. and the afrs I must be looking wrong or somehting

[ZiG]

Ok, here's my table



And don't look at the very top rows because we never got in there.. I guess 7 psi of boost, we were around the 150 kpa area.

We were using my knock sensor and his ears. The light would come on just a millisecond before we could hear really faint knocking. The last was done with his ear right up to the engine.

I, uh, also looked at the datalog and noticed they were only running at 93% throttle. wtf? I think the floor mat might have slipped in behind the pedal or something. Ya think that would account for much?

And like I said (at least i think i said this) they told me it just seemed to like to knock more than most motors. Maybe I got some bad gas or something.. it was 94 octane from chevron, so it SHOULD be good.... The engine was at about 200* F through all of this.

My max manifold air temp was about 133* F. Too high?

[Florida240sx]

Different throttle postion affects a lot. Because then it's not at WOT... How could you overlook something like that or is their machine messed up?

[ZiG]

Good question... I think it was the floor mat. i wasn't sitting in the car though, the tuner was. And he was the one looking at the datalogs, so he missed it. I noticed it this morning when i was looking at the log to see if it was picking up any knock. I guess i will go back next week (flying home for thanksgiving) and show him the log and see if we can run it again.

[S13FX]

Actually that timing map doesnt look bad at all, a lil bit on the safe side.

But it looks like the timing is there where its most needed between 3700-4300 RPM range.

Actually I just looked over my timing map from the SOHC and it is very simillar.

[neverlift]

yeah if the floor mat was stopping the pedal it would make about 7% from wot. I would check my tps voltage to make sure thats not a culprit, but it sounds like stupid mistake, I'd go back for at least one free run(they/he should be more then willing to do that for yah)

timing looks ok ,little safe for 7 IMHO, like I said 20deg for my 8.5psi.could be bad gas, if you heard audible knock it was knocking lol, 93% throttle would put you in a slightly advanced timing for wot, if he was tuning the wot area and you were not really in that area then that could be why so much time was taken out. Is that making sense I have an uber migraine.

to end, wtf is up with these dyno techs some of the **** I have seen happen on nico is