Snook

iTrader: (12)

My car is really really fast especially for my mods. It's a 12 second car no problem with a 2.0 or less 60 time.

Last night after driving around I was bored on the way home and decided to see when I get full boost. I know normally with non sequential it's supposed to be ~3500. I have intake, full exhaust with midipipe and pettit ecu and running 12 psi. Is there a problem? I do have a manual boost controller from home depot not even the ball and spring type. Is this why it takes so long to build the boost? The lag is incredible I can even feel a sort of transition when I floor it from around 2500 rpms I feel the transition at around 3000-3500 and then the boost comes on. This never occured to me until I checked last night because the car is so fast. If I could get boost 500+ rpms faster that would rock.
Here's a pic of the beast



Thanks guys
-Snook

pp13bnos

iTrader: (1)

If you replaced the ecu with a p-fc, or something thats programable, you could remove some fuel, add some timing down low to get it to spool faster.

I'm not shure how well the pettit ecu governs boost in non-seq, so I can't say for shure on the boost controler issue.

Also, make shure you remove anything in the intake path that causes the intake charge to slow down. In otherwords, the double throttle, the little butterfly in rear part of the Y-pipe etc. Also, I would think that an efini y-pipe would help the car spool faster. CJ

Scorpio

An electronic boost controller will allow the wastegate to remain completely shut until you reach your target-max boost. With a manual controller, the wastegate is slowly opening as you approach your target boost. So, with the manual controller, you are "bleeding" some exhaust energy (out the wastegate) that could be used to continue spooling the turbos.

An electronic controller is a must for non-seq IMO (I am running the older Apexi AVC-R).

Snook

iTrader: (12)

pp13bnos: a pettit ecu is a stock ecu with enough fuel to run 14.7 psi or 12 psi (there are 2 versions) It removes the fuel cut and rev limiter and bumps timing.
I'm not sure how the computer influences the way my car boosts but it should be the same as the stock ecu and in that case I think the car produces the boost and the ecu tries to compensate for it as best as possible.
Some very good suggestions you had. thanks much!!

scorpio: yes, im aware of that. The ball and spring manual controller works in the same way as soon as you hit the boost that you have it set at then the wastegate is opened. Its nice to have an electronic boost controller but the ball and spring manual ones will work 100% just as good. thanks for your help

anyone else? im sure theres nobody else on the forum with a pettit ecu intake and full exhaust running non sequential right?

racerfoo

get a BALL AND SPRING boost controller....those work just like electronic boost controller....not giving the wastegate any untill youa re at max boost...spools a lot faster.

edit: with the stock pills, non-seq i still have full boost by 3500-4000. with them removed its a little slower, but im gonna change that with ball/spring mbc

racerfoo

oh btw snook...do you have times on it yet? i have similar mods...minus the ecu and im on 10lbs...but with this much flow im gonna be where you are very soon, so just curious

Dyre

OT: Your car looks GREAT without the wing and the 99spec front. Wow! Nearly perfect!

pp13bnos

iTrader: (1)

What I'm saying is, if you want the turbo's to spool faster, you could go to a power fc instead of a pettit ecu. (I use to run a unlimited chip) If you ran a p-fc, you could remove some fuel down low, and add some timing to the motor, to get the turbo's to spool faster. Basicly its tunealbe, while a pettit is'nt. CJ

Snook

iTrader: (12)

racerfoo your boost responce shouldnt be the only thing thats changed with the pills out. you should also get less boost. **** if I put those back in i'd be in big trouble. the lowest I can get my boost is 12 period.

I forgot to mention I have a streetport maybe thats why I get boost later too. but youde think that id get boost faster with a streetport and just my powerband would be shifted higher. umm I don't have any really helpful times yet because I can't launch with my tires I spin first and 2nd my best 60 foot time is 2.2 : ( and the last time I went I got around a 2.3 60 time with a 220 pound passenger and I ran a 13.1 @ 112. I didnt have my boost gauge hooked up and I found out when I hooked it up that I forgot to put a cap on the y pipe before going to the track so I was getting 8 psi only! So with some drag radials the car is waaaaay into the 12s but Im also running 2-3 psi more than you and the midpipe helps so much along with the streetport.

Dyre thanks man I agree! finally someone has good taste like me

pp13bnos I think im probably missing 25 rwhp because of not being tuned. I still beat everyone with intercoolers and pfc so I dont really care enough to do something about it

BTW the car is for sale guys if you know of anyone that wants it.

thanks for the help any more thoughts from new people?

racerfoo

thanks for the info, i guess i didnt mention...i took the pills out to lower my boost, the boost gauge was shooting up a little too high with the pills in. i've got downpipe, hollowed cat and will have intake/exhaust within a couple weeks. the only thing im scared of is keeping my boost DOWN...so far its been ok but im thinkin computer is gonna have to go on asap when the exhaust/intake goes on.

oh yea, nice car!! you can find ball/spring mbc on ebay for like 12 bucks, and although i havnt tried them, i put one on my friends eclipse and they're pretty easy to adjust and seem to be pretty consistant.

dubulup

get the efini Y (as mentioned) and a SMIC...add some punch.