apneablue

Ok, I have seen that thread on MP and HF cats but I wanted to see if my mods will allow it or not and just see your input in general...

Mods are as follows...
- PFC with Commander (base maps)
- Apexi Intakes
- Pettit DP
- Racing Beat Dual Tip Exhaust...

Thanks again...
me

sexxy7

You should definitely get a midpipe! I think no matter what mods you have, a midpipe is always your best bet! It will help cool down your temps too!

GoodfellaFD3S

iTrader: (213)

Ummmm, NO. I've typed this like 100 times, so I'll keep it short--downpipe, midpipe, catback (no backpressure) coupled with a stock wastegate will most likely lead to boost creep, i.e. as revs increase your boost increases uncontrollably. A boost controller won't help this. You need backpressure to combat the creep--when I ran a midpipe (WITH a ported wastegate) I still crept up to 13 on a hot day and 14-15 on cold days. Last Xmas I blew *five* apex seals, and I'm pretty positive the creep was the cause....I blew at the top of third gear on a very cold night. Also, Dave at KD Rotary recommends against midpipes for stock-twin turboed FDs.

PM me if you want to talk more--I can give you a call and explain much better over the phone .

matty

some data has shown that creep is more probable with a 93 then any other years. I know there are more 93 out there but...there has been discussions about that. Also it seems that the pfc has something to do with less creep. I know, i know...boost creep is caused b/c of a mechanical inferiority (small watsegate) not electrical like a boost gauge or in this case a pfc.
How do you explain it..there is some truth out there...alot of people dont get creep.

I dont...i have the pfc and i am also a 94. 12psi all the way till redline!

sexxy7

GoodfellaFD3S,
I never knew that, thanks for posting that info though, that actually helped me too!
Thanks ~Nicole~

GoodfellaFD3S

iTrader: (213)

No problem, girl .

Although I loved the noise and smell of my midpipe (and the flames ) , blowing a motor just isn't fun .

Rich

suganuma

I 2nd Rich's recommendation for a HF cat...a good one will not take away much power at all.

apneablue

Ok, if I am planning to go single will the same HFC or MP work with the singles? I know when yo go single you have to change the DP but don't know about the rest...

This forum and it's members rock...well, most of the members anyway

suganuma

the DP that you make or are given should have a flange that will bolt up to whatever HF cat or MP that you are running before going single.

apneablue

so when you buy, say a single turbo kit it comes with a DP, correct? then does that DP already come bent to fit any MP?

Sorry for all the questions...I have been trying to figure this out for a while...

suganuma

ya

ttRx7racer

I got a question. MP or high flow which is better

azndisgrace

power wise the MP is better, but high flow is more stable

Snook

iTrader: (12)

I have an intake, streetport, dp, mp, cb and on a 65 degree night I get 14 psi solid nothing more or less ever.
Pettit ecu and upgraded fuel pump also

Don't listen to these clowns
if you don't mind the smell and noise get a midpipe
if you do mind those things at all then get a hfc for sure but remember you will be losing a good amount of hp especially with a single turbo upgrade.

If your tuner is good he is able to control your boost by doing one or a combination of these things: porting the wastegate, using pills, or some type of boost controller.

As for me I just want to run stock boost on the street and 12 max when I go to the track.

good luck friend

Snook

suganuma

single turbo you have a MUCH larger wastegate - you can run a midpipe, a GOOD HF cat wont hurt you that much

stock twins - run a HF cat, the stock wastegate even when ported can't handle the gas flow

Mr. Stock

I had the same setup(Intake, downpipe, midpipe and catback) with no boost creep.

I used Home Depot boost controller mod and had solid 14 pounds of boost.

I can tell you this also, once you go with a midpipe, you are not going to want to switch back to a hi-flo cat. The power difference is significant.

GoodfellaFD3S

iTrader: (213)

First of all watch who you're callin' a clown, pally....I'm thinkin' that Dave at KD Rotary knows just a bit more about rotaries than you. Call me crazy

I had similar mods to you, along with a ported wastegate *and* a boost controller. And Chris Ott of Rotary Performance and Dave both tuned my car, so I don't think there is a problem there.

Hell, look at the rwhp I made on a High Flow Cat and stock twins--with good tuning. You're telling me you're not satisfied with that kinda power?

Point is, all FDs are different. If some of them will blow with a midpipe and stock twins, isn't it better to err on the side of caution? Do you really want to see another "I blew my motor " thread? I sure as hell don't.

take it easy--
Rich

Mr. Stock

I agree.

Snook

iTrader: (12)

I have no boost controller at all
I ran the lines into the car for the manual boost controller though and I'm going to do that soon so I can run stock boost. The hp loss IS significant. Why does my tuner that has to warranty the work on his motor almost force people to get a midpipe instead of a hfc??
He tells them you have come all this way and now you are going to limit your car with a hfc?? this doesn't make sense.
I know you have 368 hp or whatever you are bragging about in your sig. I personally think you should keep mods to yourself unless a post asks for it. I also know you are famous in magazines or whatever and have heard good things about kd rotary. However, if you blew 5 apex seals and they don't know how to deal with a midpipe maybe you should drive your fast car over here and visit my tuner for a couple hours.
He has rebuilt hundreds of motors and had 3 come back blown but those were drag rotaries. Why would you be satisfied with that much hp if you could easily have more with a midpipe? Is any hp ever enough?

sorry to be an *** this is how I feel

GoodfellaFD3S

iTrader: (213)

(1) There are quite a few people that list their dynoed peak power in their sig--are you really naive enough to think that I'm bragging? If it was 268 rwhp I'd still have it up there.

(2) The sig is *meant* to have mods in it. 90% of the time before I respond to a post, I look at the mods in the sig first. How many times have you seen someone post "What are your mods?"

(3) Go ahead and make more horsepower on stock twins and come talk to me. It would suck if someone blows a motor b/c of your "if it works on my 7, then it'll work on everyone's" approach.

(4) You're not being an ***---I just disagree with you. That's what makes this forum so great....contrasting viewpoints. Let's agree to disagree and leave it at that .

Rich

kwikrx7

Funny, I had a midpipe on my car for a few weeks. The car was too loud and stinky but the car did move - however, I decided to throw on a hi-flo cat. I didn't lose any power and I actually got my power much quicker. I got alot more low and midrange power and highend stayed the same. it's not that a MP is bad, but it CAN cause problems with stock turbos, especially on a cold night. A lot of you talk like you know it all, but one day you might get owned because of that MP. And anyone dissing Dave at KDR - get a life. He's aorked on more RX7s than you've seen in your life - including all the times you watched F&TF. I'll show you what a hi-flo cat power FD can run.....

twinturborx7pete

iTrader: (3)

my car has all the mods, even before i ported the wastegate i never had a problem with my midpipe.. and i used a homedepot valve to hold my boost and some pills.

I say do the MP.. but it will be loud and stinky., and make sure you have the right fuel and boost controlled. Porting the wategate will help everything. Don't let fear keep you from modding your car.. just do it smart and make sure you have the supporting mods.

RX7Elmo

i had the n-tech hi-flow cat on my car [supposed best hi-flow] and it's impact was huge over the stock cat. I was able to hold boost to a steady 10.5psi without any dip at transition.

I then put on a midpipe, and the power increase in the low end was about the same, but let me tell you, when the 2ndary kicks in, it's a dramatic increase from then on.

I'm using the homedepot valve in the wastegate and a homemade pill for the pre-control. I had to turn the valve full open to retain my 10.5psi [ before was half closed ]. Although i spike at transition to around 11.5psi. this is on an un-ported stock twins.

Overall, if you don't care about the smell, the lil bit of extra noise, and want some hi-end power, go for midpipe.

Hi-flow isn't that much of a loss in power. You aren't really missing out...except the flames

Danny

Snook

iTrader: (12)

it's rediculous to say that you shouldn't get a midpipe with the stock twins
if you tune any car properly it will work beautiful

With a midpipe when the 2nd turbo comes on it's just incredible especially in the higher gears like in 4th

I can't express how cool the flames are, I love it.

I don't want to sound like I know everything because I hardly know anything. I just know everything up to all the mods I have. I have no idea how to rebuild a motor and don't claim to be better than kd rotary (that's a joke to compare me to them??)
Just limit your boost with the midpipe and get control of the boost. I don't see what is so hard about this. It's a frigen pipe give me a break. And you do lose significant hp but you may not feel it. I don't really feel that much difference between 12 psi and 14psi but I know it's pretty significant.

I disagree with all of you except for twinturbopete-he actually knows his ****
all you guys are wrong and I am the best

BTW come down here and show me what that hfc can do. I'll start your car on fire as soon as I pass you and shift from 1st to 2nd.

DavidDeco

hey yanni, is *your* tuner good???
None of them so far seem very adept at controlling my boost issues and I have a HF and had no boost problems prior to rebuild (and now new turbos too although the problems existed before and after them)

[The jury's still out for me on our mutual friend but we'll see...sure the car's back in the shop and I'm out of town as usual. I'm praying I just had bad luck but if one other thing breaks in that shop or anything else happens soon after, it's all over...I'll ship my car to japan or garland for work I'll stop hijacking the thread now...]