We threw my car on the dyno this afternoon at Pettits. I managed 290RWHP in 3rd gear at less than 10 PSI. Boost controler is just jacked. We are going to yank it and install a new Profec next week. I am also having fuel issues so I am thinking of a new fuel pump and a rising rate pressure regulator.



Oh well...



Kicked the crap out of an Audi 1.9T coupe on my way home. We rolled off a light and he suprised me and punched it right as I short shifted second. Lets just say he got to watch me fishtail my shift to third from about 20 feet behind me.



Clobbered a 3000GT (non turbo) also. He has some killer lighted windshield sprayers. That was an ugly beating.

i feel your pain, ive never had a good dyno session. on the good side ive never had a motor blow or not been able to drive it home, just dont find the power

GO BLITZ SBC-ID IT ROCKS!!!!!

How much boost do you plan on running?

Cameron is amazing. You can see the wheels in side his head spinning he is really good on his feet.



He ended up throwing a Manual boost controller in just to see what would happen. We have determined my Profec B is either broke or defective so in goes a new digital profec b.



My timing was a tad off. Like 20° LOL. I was pulling 250 to the wheels as soon as we adjusted the timing it shot up to 290.

Cameron looked over my timing maps and liked them a lot.



My fuel is driving me nuts though. Something must be set wrong on my Motec. We were running on the lean side at 1 bar and had to keep letting off. I plan on dropping it off to Cameron next week and letting him install the Profec B and screw w/ the fuel system. He thinks the pump is weak.



We looked at each other at one point and Cameron says "there is no reason why this car should not be putting down 400 to the wheels you can feel its there."

I want to set it up for 14PSI or 1 bar. should get me well into the 300's to the wheels.

VIDEO!!!!!!!!!!!!!

you are lucky to have someone as talented as Cam nearby.

the hardest part is making it work........trust me i know! it will be worth in the end. you are in good hands

You shoudl be pushing near 400 with a streetport.



I made 330 at 10psi stock engine, 60-1

good news considering your problems. Keeps us posted with your updates.

We decided to take her off the the dyno and screw with her on the street. Cam made a real fast and dirty MBC and we had her running at 1 bar rock solid on the street. That dispelled any suspisions we had of the wastegate being the culprit. We suspected that the wastegate shaft was galling and that was not the case.



When we hooked the Profec B back up all hell broke loose again. It would spike to 1.2-1.3 bar at 5K RPM then drop to 0.7 bar at 7K RPM it was all over the place.



Sorry no pics or Video we were kind of busy.

what was your air fuel target range ..

We want to see mid to high 12's on the a/f. we were seeing mid to high 13's and we both are not happy w/ it.



We are going to hook a fuel pressure guage up and see whats going on. If it is falling off, new fuel pump and a FPR.

is it across the board, or does it lean out after a certain rpm? cym's car does the same thing, the injectors go 100% and it starts to lean out over 6k. its too bad too cause thats where everythign starts to flow.

good luck next time at least u got to vent

Aren't 12's a little on the lean side for a target though? 11:5:1 was always what I shot for, plenty safe but not rich either.

i prefer not to venture above low 12s..

takin into consideration seasonal temp changes and creep for me..

me and mazda agree with you. theroretically theres a correction map for that, but i like my motor where it is, in the car. mazda just runs 10:1 under boost

Typically 12:1 is for optimal peformance that is one the edge. Should be fine, but then again wouldn't take much to detonate.

i ran 10.0 on boost and it ran fine...

10 i never knew mazda was that conservative.



Jims, wouldn't a rising rate fuel pressure reg make tuning difficult. Why not just tune for injector duty cycle? which fuel pump are u using, i recall you mentioned u use the Denso pump?



BTW get teh apexi AVCR, I guarentee you will like it.

its nto just mazda that runs 10 on boost, even na cars run 10s, in fact most stock cars are there, tha ti have seen that hit the dynoes. timing is the big key in tunnig af is only part of it.

yeah the wrx runs like 10:1 too and my bro's audi was off the charts. they have to make it so it wont blow up on a cold night and cheap gas

Who was it that dynoed his Fd at 10:1 @ 15psi and hit in the neighborhood of 450rwhp? Seems like it was with a t-78, wish I could remember. ErnieT maybe?

Igy tuned a TO4s on a FD to 460 on a sideported motor....

10:1 huh? OMG! MY fuel map is already at 90 out of 99. I am going to look over my maps more and see if I do not have something wrong here.

like 90% duty? how big are your injectors?

FD motor - Stock primaries 1300cc secondaries.



I think my fuel map is messed up I have the fuel coming on too late.

Well with 550/1200 I never saw 100% duty cycle till I threw in the t62-1 and went above 16psi. I guess with your ecu you can re-phase your injectors so the secondaries come on later.

yeah you should be able to do like 330-350rwhp on those injectors, at an 85% duty.

Lets see, looking at my handy fuel chart, 550/1300 @ 85% duty cycle is showing 405rwhp. 100% duty cycle puts it at 475rwhp.

at what bsfc? this is another arguement, but most of the fuel calculators i think are wrong on the bsfc. because they were made when everyone thought the stock ecu only did 63% injector duty, well surprise, it does like 85%+, so the bsfc on a stock fd is more like .85 than .65, so that makes my numbers lower. i find a .7-.75bsfc is more realistic than the .60-.65 that most people use.

what what fuel pressure? 37? 45? 100?

Very true. I don't know all those details. But when I compared the chart to when I dynoed my apexi kit, it was almost dead on the money for horsepower VS duty cycle.

hmm cool https://www.nopistons.com/forums/pub...#>/biggrin.png