badass7

I will be running at 12 psi. with a Stage 2 street port and all the bolt ons including straight thru exhaust. Only other fuel mod. is a Walbro 255 high flow pump. Of COURSE...this will only be for about 6 months until I go with the Power FC. Just wondering how safe and how many people are running with a similar setup ? Again, I will not go over 12 psi. of boost until I do away with my G-Force Unlimited ECU.

yzf-r1

iTrader: (1)

I have the same question.....getting my motor ported and wondering if it is safe....I think it is as long as you stay below 13 psi

Mahjik

iTrader: (1)

Here's the list from a FD owner local to me who goes by RTS3GEN here, and who is using a Pettit Unlimited ECU (I just copied his sig):

Pettit Dowelpinned Racemotor
Pettit downpipe/midpipe
Pettit Unlimited ecu
Pettit power pulley kit
Pettit Brakelines
Pettit AST
Pettit Battery relocation kit
Pettit balanced/Flowed injectors
Pettit big/brake/kit
RP Fuelpump
RP Radiator
Ground Control C/O w/Tokico 5ways
Apex GT FMIC
Apex N1 single
Apex sideskirts
Blitz BOV
M2 Rollbar
Greddy Gauges
Greddy Profec B
Custom Homemade intake
KAAZ 1.5 way rearend
Mazdaspeed PPF
Mazdaspeed shortthrow
Masdaspeed 4.30 gear
Wendland Perf. Rebuilt Tranny(126K)
99 spec Mazda Spoiler
99 spec chin spoiler
Sparco Torino DS
CarbonFiber dash
18X8.5/18.9.5 Enkei RPO1 Chrome
Pilot Sport Michelins
Scoot hood
REAmemiya Sleek lights

357.2 rwhp 15psi
11.77@116.77mph

Not too bad...

yzf-r1

iTrader: (1)

I'm assuming he is running race gas at 15 psi, and he must be at 100% duty cycle with the stock injectors

I blew my engine at 14.5 psi with 93 octane, and I actually thought about putting some 104 in before I raced!! big mistake not to

oh well, live and learn, and pay out the cash

Snook

iTrader: (12)

if your injectors are flowing close to 100% and that fuel pump is truly an upgrade I would think you will be safe at 12psi but don't go any high
I think when you get near 14 psi you are really pushing it.

also what are you going to do to ensure that you don't go past 12 psi? Make sure it stays right there


lots of people have blown there motors and if you run lean at all it will happen to you too

is that computer you have the same as the pettit unlimited ecu that is supposed to be good for 14.7 psi?

yzf-r1: I feel your pain but instead of paying out the cash I will most likely be giving up the car

yzf-r1

iTrader: (1)

anyone else? I'm trying to decide if I need to get the 1300cc injectors and PFC to run a street ported engine, IC, and full exhaust at 13 psi....Pettit seems to think I should be fine, but of course they are a little (!) biased

boostedrotor

i'm running all the bolt ons with a streetport....my car just runs rich all of the time, and my ecu is set for 1 bar.....never leans out @ all.....this is a rp ecu btw.....i have no problems excpet sometimes she doesn't idle to well......

Mahjik

iTrader: (1)

IMO, I don't think there is a problem with his config (or ones like it). RTS3GEN has been tracking his car pretty hard for a number of years on that config.

I know he does use race gas from time to time, but I'm sure he's torn up some tracks on pump gas as well with no ill effects. He mostly does SCCA type track events with the occasional drag trip.

Just toss him a PM, I'm sure he won't mind answering a few questions.

The main thing is making sure everything (injectors, fuel pump, ect) are all flowing/working properly when running boost levels like that. I know RTS3GEN goes over his car with a fine tooth comb every week to keep things going for such performance. If you dialed the boost down to say around 13 PSI with all the bolt ons, I think you would be just fine (as long as everything else is working properly on the car).

yzf-r1

iTrader: (1)

believe me I'm not planning to run more than 13 under any conditions this time, it's not worth the risk for a few extra hp....the ported engine should flow better at lower boost anyhow

RTS3GEN

Props Kyle,
Thanks for that, You CAN run safely at 12 psi on pump gas ie 92 or 93, but I don't push anything over 13 on pump gas. I have a wide band at my disposal and my car runs about 10.9 to 11.1 at 13 psi on 92 octane. I find this is safe and effective configuration for street use. However, as you guys point out I ran my Dyno at 15psi with 3 gallons of 104 unleaded race gas and my A/F wideband reading was 11.1 at leanest. Remember you can be safe or sorry, just depends on the boost you run.
Art

RotorMotorRX7

Im using the Pettit ECU with a streetport. 12psi with a few bolt ons runs good... a bit rich.. but good

boostedrotor

sereis7, when i got my midpipe, i don't have creep, just a nice spike @ transition, i have thought about the the non seq. conversion, how do you like it...it seems to be the hip thing to do latley.......btw, what are u doing for fuel???

jspecracer7

Tell you what, the non-sequential change is one of the best things I did to my FD besides going single turbo. When people say that it makes the car feel like it has a small single, they're absolutely right....not that I have a small single, because a Turbonetics 62-1 is definitely bigger than a T-04S.

Below 4000 rpms, the non-sequential and the 62-1 feel the same. About 4300 rpms, the single pushes you in your seat so hold on, where as the non-sequential....well, it was still pretty fast for stock.

ArchangelX

Just outta curiosity (and because I might be doing this for a few days before I get an an aftermarket ECU)...

Can I run a streetported motor with NO mods other than a downpipe without an aftermarket ECU?

Any ill effects?

jspecracer7

Stock ECU map's are fairly conservative when it comes to fuel. I've read somewhere that they're tuned 10.xxx from the factory. I think you'd be safe if the ONLY mod is downpipe.