Don't forget the motor and other systems. Turbos alone won't get you to that number. You'll need
- a motor with a good port and a good build
- appropriate fuel system
- a good tune
- appropriate ic setup

Without a doubt, I figured that it would be a given for someone to assume that i meant it to make 400 in conjunction with other mods and not just bolt to stock and go lol
thanks for your post
-Alex:)

Now I am in the stage were I am looking at the pros im cheking out the specs on the re-amemiya car the pan speed and the fujita engineering (feed)

Very good points. :icon_tup:
Also, fwiw, Dave @ KDR said the highest he has seen was 391 rwhp on stock twins running sequentially. He also said that that particular cars turbos sh*t the bed approximately 300 miles later. :(

if its a silver fd it is still here but he wont drive or sell it:wallbash:

Thx for the correction. I've never been around any dynos so I don't understand all this correction hoopla. Guess I've find out when I finally get my 20b up and running.

Its Mercedes Bahama Blue Mica

Original Stock Rotary and sequential twins on my 94
All the major reliability mods done FIRST
PFC was dyno tuned by Dave@KDR to 349 rwhp and 302 rwtq at 15psi
That was 20,000 glorious miles ago (75,000 total).

The only thing I didn't do that I still intend to is add the second oil cooler.
Oh, and port the engine and upgrade to BNR twins and rebuild the tranny and upgrade the differential and ... you get the idea.

I think the 99 twins with methanol injection and a ported motor will give you realiable 400 rwhp.

That's what I plan on doing in the next 6-9 months.

I have to give props to Defined Autoworks in Pataskala OH. Very talented and dedicated shop.

The '99 spec twins are really not all that different from the stock twins so I am not sure why you think you will get 400 whp out of them. What boost are you planning on running?

From what I understand, the 99 spec twins are supposed to be *less* efficient/reliable at higher (above 15 psi) boost levels. A lot of the tuners in japan keep the boost around 0.9 bar/13ish psi.

methanol injection has it's place with single turbos and 20+ psi, but not with stock twins. In my opinion of course :)

I've had that plan for a while. Two reliable shops tell the that is a reacheable and safe goal with the 99 twins. As for methanol injection, there is a whole subforum on the forum about it, and reading it will much more eloquently let you know how methanol will help in this goal as well as reliability. I currently run my stock twins on an untouched reman, open intake, exhaust, fuel, Power FC, Greddy SMIC at 0.85 atm, (Approx 12 lbs?), with 333 rwhp.

I also really enjoy the instant power the twins give, and have experienced single turbo's with much more power, but just too much lag.

Do the BNR's give the same power characteristics as the stock twins, both regular and 99 twins?

Rich has experienced BNRs in non sequential, and loved them. Now he has a 500R and loves that more...

You need to ask them for dynos. I'm not sure there is anyone on this board running 400 whp with '99 spec twins. There are several running that with BNRs, which cost about the same.

IMHO, '99 spec twins are a nonsensical mod given their price and their minor performance improvement.

Well, I technically own two rotary shops myself, one of them pretty well known :)

I'm telling you that you will not make 400 rwhp reliably over a period of time with 99 spec (basically stock) twins. What will happen, is you'll fry the turbos, and possible spin off a compressor nut or two.

I'm very familiar with methanol injection, I've been running an Aquamist system on my FD for years now. With the boost levels that the 99 spec twins are capable of, the full potential of methanol will not be reached.

Replace the 99s with BNRs, and *now* you're talking.

Not trying to break balls, just trying to save you time, aggravation, and cash.

Most importantly cash...BNRs are actually cheaper than BRAND NEW 99 specs. You can find used 99 specs for 1600-2000 on this forum once in a while, but why deal with 99 specs that also deal with boost creep if you don't port the wastegate? BNRs FTW if you stay twins.

ok
 

[QUOTE=gmonsen;7694172]Galagnu... Now you've gone and done it. My instant reaction to using methanol was that hopefully this is just going to be a race car or at least just a toy and that may well be what you're going for. Now, I need to read the subforum and see what makes sense there.

I constantly wonder why in the process of modding FDs some people make them so unuseable on the street. There ought to be a rule that anyone who mods their car poorly or too much can never speak on the subject of reliability publically. As in, "jeeez, my Rx7 is beautiful and has twice the stock whp, but IT has blown several times." "IT" didn't break. The OWNER broke it.

If you want to make 400whp on sequential twins as some sort of exercise to prove you can do it, fine. If there is some particular reason you need 400whp, pushing twins to the brink of extinction probably is not the best way to get it and you would do better with a single that spools well. If the instant response is most important than go with the BNR setup and live with the whp you get reliably.




Appreciate the info. Looks like I will need to do more research. My car's purpose is to please me, both on street, autocross, and would like to do track events. I guess if push came to shove, I would lean to reliability rather than extremes. So 30 rwhp less may not be a deal killer.

That being said, I do think methanol injection is in my future, not only as a power mod, but for reliability. Having seen a car being tuned with it, I just cannot say how impressed I was. Please dissect the methanol (AI) subforum and see what you think. As long as the methanol system is put together professionally, it should be a great addition to a modded 7.

Not to put Chris on the spot, but on their site, he mentions seeing 99 twins as much as 385, but usually 330-350. I also know he leans more towards conservative and safe tuning. With him as my tuner, I have 333 now on stock twins, non ported motor.

I would listen to Goodfellas advice.

do yourself a favor and re-read goodfella's post. his advice is dead on and you arent hearing him. what you are saying is illogical.

oh my god are we back to using logic on this forum. jeeze what abreath of fresh air.
.

I Give!
 

Appreciate the info. Looks like I will need to do more research. My car's purpose is to please me, both on street, autocross, and would like to do track events. I guess if push came to shove, I would lean to reliability rather than extremes. So 30 rwhp less may not be a deal killer.

That being said, I do think methanol injection is in my future, not only as a power mod, but for reliability. Having seen a car being tuned with it, I just cannot say how impressed I was. Please dissect the methanol (AI) subforum and see what you think. As long as the methanol system is put together professionally, it should be a great addition to a modded 7.

Not to put Chris on the spot, but on their site, he mentions seeing 99 twins as much as 385, but usually 330-350. I also know he leans more towards conservative and safe tuning. With him as my tuner, I have 333 now on stock twins, non ported motor.



Perhaps you did not read what I wrote above. It may have been lost in my responce to gmonsen's post. Also, reiterating what people with experience have told me is not illogical. As I said, I will be doing more research before making a decision.

you can make 380+ on 99 spec twin...that reliability factor only inclues the motor NOT the turbos...BNR's are the only twins that can withstand hi-boosting long term because of their 360 degree thrust bearings and reverse threaded compressor wheel nuts.

I think its a terrible idea trying to run 400hp on stock ports as well

What ports would be best for use with BNR's ? (for about 400hp)

I'm just thinking of installing them :)

Thanks

Jon

Ive got a magazine (last years Japanese circuit attack times and cars) here with the FAM speed car. They say its running stock (original) twins which have been overhauled and a running a high flow turbines to increase air flow. 850cc injectors. stock fuel pump.

It even still has original radiator and original cat.

The car has 499ps.

Ive also got the Auto Staff car, its running normal twins with 380ps.

thats around 483 and 375hp