I have a Profec B and didn't experience boost creep either...until I installed my midpipe . I'm now creeping to 13 in warm weather and have seen 14 in cooler weather. I'm running 13 all the time, so technically there's no creep. *But* w/the Profec off you're supposed to get 7psi. I would creep from 7 at midrange to 13-14 at redline. So...the Profec B definitely does not cure boost creep. The only thing that does (that I know of) is a ported wastegate. Dave at KDR ported mine; I can only imagine what boost I'd see w/the stock wastegate.

hope this helps,

 

While on the subject of upgraded twins, has anyone here tried Forced Performance's upgraded twins? http://www.forcedperformance.com

They've been doing some great things with turbos for DSMs, just curious as to if anyone's tried em.

 

Want2race,

Getting 10 psi before 2000 RPM is pretty impressive.

Capt. Bill,

Do you get full boost that early? When do you get full boost now?

 

Hey this larger Twin turbo upgrade sounds good. But i'm just curiuos if this upgrade will get u up to 430+ HP w/ the proper setup. Could using a Seq. twin setup get you in the 10s?

 

GoodfellaFD3S, With you`r PRofec on you "technically"get no creep, with it off you get creep. But it doesn`t cure creep? You want to run that by me again?

Red Rotary Rocket, I seem to get 5 or so psi of boost by 1800 rpm and full boost by 3000 rpm. It`s a bit hard to keep an eye on the tach and pillar mounted boost gauge at the same time to judge this. And I have an aluminum flywheel so the rpms change pretty fast.

Tobal, I would assume if the turbos are big enough and you had the right fuel and boost setup, twin seq. could take you into the 10s or lower.

 

but i'm just saying do upgrade seq. twins have the potential to go into 10s or even lower. Cuz i'm pretty sure most of the single upgrade can be acheived. cuz there is only so much space u can upgard the sequential setup.

 

What gear...5th? lol

sorry just couldn't resist, 10 psi at 1800 rpm, seem salmost unbeleivable. in 1st or 2nd. well maybe second

 

I have a couple of questions.....

The M2 kit includes the exhaust maifold? They didn't mention that when I called, so I just want to verify. Is it a stock manifold? Does it look ported or anything?

Does the $2800 price tag include your turbos in exchange?

I wouldn't expect that you would be able to run with the same ECU (stage 3 M2 in your case), as they should be moving more air (lower temp) at the same psi. Perhaps you are just running less rich now than before. I think some dyno time could really make the difference.

I plan on getting a few dyno runs with my current setup:

M2 Downpipe
Sr Midpipe
Apexi Catback
Greddy IC
RP Pulley
RP Fuel Pump
HKS Ignition
Pettit Intake
Blitz Boost Controller
Power FC

And then a few runs with the M2 BB kit and upgraded set of injectors.

That's a couple of months off though....

-Matt

 

Phil- Try 3rd Thats the boost test gear!


I think 450hp wouldnt be unreasonable!! Its my goal if someone provides the $$

Definitely capable of 10's with some nicetires and a diff.

My only problem is that WHEN both worked they made soo much boost during the transition it would shift the tires sideways!!! Scary feeling! Thats why many people go NS

 

hey sounds good that you can produce that much power with the upgraded Seq. power. I just really want power w/o the lag and it seems like upgrading Seq. turbos will do it. my goal is really 400+HP and going into 10s. And looking at the single upgrades all kit get spools around 3500+. And i know w/ the single i could acheive 10s and 450+. cuz i've been really looking into teh single upgrade for big power. But if the upgarde Seq. setup can get up there...i might just go that direction.

 

i dunno why, but i just dont like big single turbos. there is too much lag and too much other **** to buy.

to go single, you need a stand alone ($1500), new IC ($1500), full fuel system ($1000) and the kit itself ($3500), and coutless hours of dyno tuning and labor ($1000). thats $8500 for 100 more hp that you get with all of the other bolt on mods that you need, assuming you already had them. (350 hp for stock twins with all the bolt ons, as opposed to 450 hp for single with all the bolt ons and all the other ****.)

100 / 8500 = 0.0117647. that is hp/dollar for single turbo.

i dunno why....but i just dont like the thought of going single. too much hassle.

 

Bill, When you dyno please boost a couple of different levels..ie 10 psi, 15 psi and 20 psi or whatever you decide...most appriciated..

 

Tobal,
I`m afraid I don`t know the final answer to you`r question about getting into the 10s. Give Brett a call at M2, maybe he can answer it.
Speaking of Brett, he called me late on friday to check how things are going with the car. Nice follow up on his/M2`s part.

matt_ledbetter,
The turbos do come mounted on a fully setup manifold. And I believe it is ported.
the price I payed was $2995 and you do not have to send you`r turbos in as exchange.
And you`r right , they do pump in more air at a given psi.
That said, I am running a stage 3 M2 ECU and M2 said it would work with up to 12 psi of boost with these turbos. I have a J&S air/fuel meter and it always reads rich under boost.
While I intend to get on a dyno soon, perhaps next week. There is not much tuning I can do at the moment. Except for perhaps increasing the the boost a little as long as the engine stays rich.
It`s tempting to increase the boost alot as long as the air/fuel mixture is on the rich side . But without being able to tell what duty cycle the injectors are running at I don`t want to burn them out.
Once I get a fully programmable engine management system and 1300 cc injectors I`m sure there will be more HP to come.

Want2race,
That reminds me. Have have not done a true 3rd gear boost test yet. I will try to do one this weekand and post the results.

JoeD,
Just remember, to do a high flow twin setup right, as in get the max HP out of it, you have to do the same modifications as a high flow single. I did it because I didn`t want lag and I just like doing things a bit differently.

Mr rx7 tt,
I`ll try to do that.

 

I was originally going to get the M2 unit, but at the time, Brett didn't have any in stock or on the way (about 4 to 5 months ago) and I bought the SR upgraded twins. Kinda sucked when Brett called and said some were ready a couple of weeks ago, so I sold the SR twins cheaper than I really needed to so that I could get the M2 units. Now I just need to go work the street corner a couple of months to come up with the rest of the money

Can't wait to hear how the dyno session goes. When you say piping needed work, do you mean the hard pipes that come off the turbo inlets? Metal in back and that hard black one in front?

Tim Benton

 

Hey Tim & Bill, well i would love to know dyno results with the upgrade. This might make me go back to a Seq. setup again.

 

everyone has there own taste on turbos
but most high tuned twinturbo cars have almost the same stuff as a single. Look at most peoples mods. Most have an intercooler upgrade, some type of ecu upgrade, pfc or haltech, most have upgraded fuel pump. upgrade injectors and a fuel rail can be had for not to much money. I don't see how you could spend $8500 for a single kit with just a few other items.

plus when you do go single you can make a little money off the parts you would sell. your stock twins, your downpipe, your remapped ecu if you dont have a pfc or haltech. that probably close to $1000 at least in parts you would sell.

the only thing i changed on my car is Adding haltech, $1050 and single turbo kit that I put together. $2000 along with injectors and rail and fpr. around $400. i spent around $3450
then if i add in selling my stock turbos for $350, downpipe for $100 and remapped ecu for $400 I made back a little money to help with the cost. i have not had to pay for dyno tuning yet, so i can't factor that cost in. But the cost of going with the M2 highflow twins and a single kit is not that different. $3k for there kit, and they state on there site the highflow twins require additional engine management and fueling over M2 stage 3.

i think it all comes down to what you are doing with your car. for me i did not car for the constant problems wiht the twin system. and I don't like the kick in power of the 2nd turbo coming on so hard. Just my opinion, but still I don't see a big cost diff on a good set of twins like M2 or a good single setup.

 

so basically a twin setup comes on faster and a single comes on later. and depending on which single you get you can achieve higher rwhp. and a single has its advantages because of a less complicated setup (ie vaccuum lines). am i right ?

luigi

 

Yea i kinda looked prices for single and Twin upgrade. And they are about the same price. And the Single is less complicated because of less vacuum lines. and no matter if u go single or twin you would still need the same upgrades and management. Right now i just want to know the potential of the upgraded twins. Cuz i have a idea of how single would be like.

 

OK, heres the results of my boost test and 40 to 70 mph test.
Nice cool night, low to mid 70s, three quarters of a tank of gas.

Starting in third gear at 35 mph and then going to WOT I get a full 12 psi of boost at between 2800 and 3000. Needle on boost gauge moves so fast it`s hard to tell the exact rpm full boost is obtained. But it is definitely before 3000 rpm..

40 to 70 test.
An average stock RX 7 runs the test in about 4.9 sec.
A slightly modified car in 4.2 sec.
This according to Rob`s site.
The best time I got was 3.64 sec. and the worst time was 3.83 sec..

So I`m at least 1 full sec. quicker than a stock car.
Works for me!

 

Wow that pretty impressive being in 3rd gear with that time. That's the nice thing about upgraded twins or even the stock sequential system - any gear at any speed and you're spooling quickly. I'm running non-seq. and get all my boost (13 psi) around 3500 rpms - it's a little laggy before that. But my car acts like it has a small single - like a T04. Wants it hits 3500 rpms it pulls MADDLY all the way - no switchover - just mad acceleration. I sacrifice low-end power for more midrange. i personally like the feeling of the stock sequentials and how fast they spool up and I can only imagine the M2's BB turbos. But if you like 1/4 miling, street racing (need more midrange and topend power) on the highway over autocrossing then a single or nonsequential set-up is for you.

 

Dyno plot!!! I know others have said this already, but I'm eagerly waiting to see a dyno plot for these turbos!!

 

bbr1, I know, I know me too. I just have to find ther time. Maybe next week.

 

^Bump^
*now chanting* "DYNO PLOT!!"

 

Any updates??? I need to know!

 

No plot yet. Engine now has a miss at off throttle cruising. Going to fix that first. Hopefully on Wed..