matty

After ssome serious issues with installing the 1300 cc inj i finally dynoed with power fc, intake, full exhaust, m2 med ic, 1300 cc inj, fuel pump @ 15psi and made 340 rwhp. The turboes and motor are stock with 37k miles. I dynoed at kd rotary. Dave said his dyno has been on the blink lately and been reporting rwhp about 10-20 hp too low. He wants me to come back in a few weeks once it is re-calibrated as he was confident i would make 350-360 rwhp. I dynoed last spring @12 psi and made 297rwhp with full exhaust, intake and power fc so i tend to agree that with the added psi and IC that i am making those levels.
All in all i am extremely happy with the car. It is tuned extremely well as the power curve is very linear and smooth up top. She makes great power and the turboes spool imediately in seq mode....i think i am finally done. blah...maybe just some coilovers now.

paw140

I thought dave was getting his dyno fixed a few weeks ago?

ptrhahn

iTrader: (9)

What "issues" did you have w/ the 1300cc injector install??

matty

oh man it was a disaster..we installed the inj's and we made a run. At 6k rpms the car cut out and then the idled real choppy...we both thought the engine was gone. Dave took the intake manifold off and started searching...he then tested the inj...they tested fine. He then got it to idle ok by taking tons of fuel out.. hmm...seems somehting is up with the inj even though they tested fine. We installed another set...everything was fine. He was cruising in 2 nd gear then all of a sudden tons of black smoke. and the engine died. He again took of the intake manifold and inspected...it turns out the injectors were gettting stuck open and just drowning the engine. We intalled a third set and no problems...and i am making good clean power....man after all this crap..i felt sick..literally.
So end result is two faulty sets of rc injectors and a ton of stress.

Street King

Yikes, good to hear everything is alright and another 350+rwhp FD is pouding the streets.

Anyone else have 1300 inj. problems?

ttpowerd

Sweet, that's good to hear. I have about the same mods...I like the numbers

matty

i like the numbers too man...i should have some 1/4 times next weekend.. the car feels fast..i am hopping for 11s but without drag radials or slicks is gonna be tough.

rynberg

Congratulations, those are good numbers for a stock-ported motor. Mind scanning the dyno sheet? It would be nice to see your A/F ratios and how much low-end torque to retain with a stock-ported engine/mid-pipe combination.

BTW, I keep hearing more and more bad experiences with the RC-bored out 1300cc injectors (leaking or sticking open). I'm beginning to wonder if it might be worth the trouble/expense of just upgrading to 1600cc injectors.....

1stand3rd

Great numbers there Matt. Two sets of injectors were bad??? Sounds unusual to me. Have others had any issues with the 1300cc injectors?
Good meeting you yesterday at KDR.

matty

i would rather have spent double then to go thru the stress i went thru. It is not the money that bothers me...its the amount of time i wouldnt have it and how it wouldnt be under my supervision....i wont even drive my FD to a bar let alone let it sit in a garage for months.

I am trying to speak to my Tech department about scanning it...just have been busy this morn so i havent had a chance.

matty

it was good meeting you...your car runs great.

It does sound odd...thats why i kept insisting that there was some sort of electrical problem or something. But with the thrid set in the car it is running great...!!

ttpowerd

I've got a set and they are fine for me. I don't know what happened to yours Glad everything got worked out though. I ran at the 1/8 mile and posted it here:
https://www.rx7club.com/forum/showth...hreadid=174904

Decay

I guess Dave knows how to tune a PFC, huh?

Did you do any runs at boost levels that won't melt the stock twins? 10psi? 12psi?

matty

12psi ~300rwhp
14psi ~325rwhp
15psi ~340rwhp
My afr were mid 11s

BTW, 15 psi is fine for drag strip or occassional street encounters.

matty

$5 billion dollar hedge fund and no scanners here....
sorry.

Decay

Quality numbers, car is probably a dream to drive...right where I want to be

sexxy7

matty, do you live in NJ?

matty

nope....CT

rxrotary2_7

glad to hear you had a good day.

rxrotary2_7

https://www.rx7club.com/forum/showth...hreadid=174768

teachermechanic

iTrader: (4)

Hi Matty, where i buy 1300 injector w/o a lot of problem and you know price?
Thanks

streetdreamzny

iTrader: (6)

matty congrats thats some nice numbers, i think you'll run some 11's next time at the track

skotx

Do you have a Datalogit? Any chance you could share your maps, for those of us with no tuners nearby?

-Scott

ShortBusRiot

I have heard soo many good things about KDR, i am almost certianly taking my FD there (picking one up this summer).

kwikrx7

Nice numbers Matty - for stock engine and turbos, your car put down respectable numbers. 15 psi is fine for occasional bursts but constant abuse and they'll start to melt. That's the main reason I got the BNRs is so I could run 15 psi more efficiently. Dave still didn't get his dyno fixed yet? I know he said the techs found the problem...350-360 rwhp is great tuning from Dave and the good thing is he's pretty conservative. There's been some talk that he's not a good tuner but my car feels incredible and he's got alot of good numbers out of the twins and singles.