This was the first time I've ever been on a dyno and the first time for my car. I think the air fuel ratios are good but a little rich.

The first run was at 5.5 psi, the second run at 6.5psi, which dropped back to 5psi after 6000 rpms. It was in the mid 90s temperature and I melted half a bag of ice on the intercooler.

Mods are:
emissions + airpump removed
cats hollowed
stock turbo
rising rate FPR set abut a quarter turn from completely open (very small rise in fuel pressure)
3" TID, cone intake
HKS FCD

Can the fuel be tuned much more? I think with an AFC on the stock fuel system I should be able to run 8-9psi safely and hit about 210-220 hp at the wheels.

Thanks for any comments/ suggestions.

 

No rpms on the dyno sheet. What gear did you dyno in ?

Here's my stock 1992 TII with exhaust upgrades only for comparison (running 7.5PSI from boostcreep).

 

Your A/Fs doesn't look to bad, especially after 4K rpm.

Your a little lean out at the bottom end (1500-3000), though!

And I'm guessing that really rich spike is when your secondaries come on.

 

Yeah I was wondering about that lean condition on the low end. Shouldn't be a problem since it's really not running hard or under boost in those conditions.

The dyno runs were in 3rd gear. I think it seems to be in line with your 1992 TII. I don't have a good exhaust system but it's probably a small improvement from stock, the cats are hollowed and the intake is far from stock. I'm making a touch more HP but my a/f could be a bit better and you've got a handful more torque which you should have with the newer engine.

I plan to use the RRFPR and buy an AFC to tune this setup a little neater, upgrade my boost controller to get on the boost quicker and hold it steadier than the current shitty regulator. I'd like to run about 220hp on the stock fuel system and it looks like I can do it safely.

After that I'll have to save up a bunch for fuel pump, larger secondaries, proper exhaust and a larger turbo. I'd like to get it all in one go... but if I pick up the AFC then I should be able to tune some 720s and a higher flowing pump to not run too rich before I get some extra boost. :-) Any other comments appreciated. I supposed there's not much to say. I wonder why the low end is running lean. Old clogging injectors maybe? It does tend to flood easily.

 

I just got back from the dyno as well yesterday, here is my run:



This was a 4th gear pull at 13 psi done on a mustang dyno.. from what i've heard, since the mustang dyno's are load bearing dynos, compared to the Dynojet systems, the numbers you get are somewhat lower (shrug.. couldn't ever find some real proof of this)

I was experiencing an ignition glitch at 5800 rpm (this happened no matter what gear or boost i ran) which hurt my overall figures (most t2 dyno's I've seen have had peak power at about 6500-6800 rpm).. I've tracked this down to faulty wireing which I have just fixed..
I won't be getting myself back on the dyno until I get my front mount IC installed though.. running 13psi boost I was seeing intake temps up around 99C.. which is about 200F.. much too hot.. I wonder how much power i've lost because of that...

I went on the dyno just to give me a little peace of mind that I wasn't too far off with my wolf3d maps, which i've been tuning on the streets using my greddy a/f guage.. as you can see, I wasn't too far off on my a/f .. I've since leaned out my maps from about 3000 rpm - 6000 rpm ..

You should really do you pulls in 4th gear, since that is your 1:1 gear ... I made a couple of pulls in 3rd gear, and it netted me 218rwhp... (had the same 5800 ignition glitch) .. made a 4th gear pull and hit 230.4 @ 5800 rpm...

Mods so far:
s4 3mm streetport
550 primaries, 720 secondaries
malpassi FPR (set at 40psig)
racing beat exhaust
Wolf3d v.3.1
FD fuel pump
Hybrid turbo

 

I asked the Dyno guys about 3rd or 4th gear. They said most people do 3rd gear runs but it wouldn't matter. Since everyone else was doing 3rd gear that day I did too as it seemed better comparison. Next time I get near a dyno I'll run 4th gear. Thanks for the info... You're making pretty good power too for light mods. That street port must feel really good with a full exhaust.