yeah.. ive delt with rotorsports before... i belive they use a byno thats in morrisville.. and ive herd nothing but good about rx7world.. but ive never had owrk with them..yet..

 

Ok, I've been debating over 3 setups for a while now. I'm currently trying to get a few things done such as finish the stock twins setup (ie. DP, High-Flow Cat, SMIC, Fuel Pump, Injectors and then PFC). The three setups:

1. Stay with Stock Twins (pushing 335 to 350rwhp)
2. BNRs Stage3 (around the 400rwhp)
3. gt35r (also staying around 400rwhp)

I'm a street guy. Not a street racer but just like to have a really fast street car. So that being said, is it worth going with all the extra cash to gain 50 more rwhp by going BNRs or a Single for a fast street car with a track day or dragstrip day about 3 or 4 times a year? Are/were any of you pleased with a maxed out stock twins setup?

No matter which way I go, I think that 400-425rwhp is a good stopping point but I realize that's to much for the stock twins, which is why I asked the question about being pleased with them maxed out. Thanks.

Brad

 

I am making 373 whp w/ my twins @ 16 psi. I was getting used to the power as I modded through the years. So I kept striving for more. Pretty much like everyone else on here. This current set-up still feels very good to me. 7000 wiles w/ this set-up and I'm not "bored" w/ it. Although I always think of what about a little more. Who doesnt. Getting to my current set up you have to take the big dip. Wallet dip that is. Stand alone, more fuel , tuning,. I even recommend a real time wideband w/ guage to monitor AFR's. I also run at least 50/50 100/93 octane mix. If you run more than a bar of boost you better be smart about it. Still no guaranties. Garret

 

^^damn I think that's the most I've seen with the stock twins

 

damn l leave for a day yall dun took over!!! lol. So seq. twins "can't" give me the power i'm lookin for??? Yall tell me......which is more fun.....seq twins or a single

 

Just search for the two words "sequential vs*"

 

That is a matter of opinon. Your not going get one difinetive answer.

You may want to seak someone in your area out with a gt35 or similar sized turbo, and see if they are nice enough to take you for a ride.

Thats just my advise though.

 

see below

 

here are some dyno graphs:

Sequential twins:


mods:
15 psi
Sequential
11.3:1 AFR's
Power FC with my tune
RX7Fashion Intake
Bomez upper intake pipe
Koyo
NPG-R
ASP Medium SMIC w/10" Spal Fan
Greddy Elbow
SMC denatured alcohol injection (10GPH nozzle)
HKS Twinpower
9's all around
Megan racing downpipe & midpipe
Racing beat catback
Neo Synth driveline fluids
100 octane unleaded for safety
ACT Xtreme plate with a full face street disk
28lb blingin' wheels :p
__________________________________________________ _______________________

BNR's sequential


ask rynberg he is pushing 350 sequential at I think 15 psi. (sorry I could not find his dyno
__________________________________________________ _______________________
Single Gt3540 16 psi

 

Don't foget a linear powerband on a road course is alot more predictable in the middle of a corner under throttle. This was one of the reasons for me to go parallel, and then changed my mind to end up going single.

 

I don't know how much HP I have (never had it on a dyno), but with my stock turbos and stock engine with 103K miles (not rebuilt) I am doing the 1/4 mile in 11.78 secs @ 117.8 mph on 94 sunoco pump gas, and I will beat this next time I go since I got a short throw shifter so I can shift into third much faster and accurately, and maybe the new NGK -115 race plugs and FC leading coil might help alittle. I wideband tuned it, running about 17-18 psi, I know most people say don't go above like 15 psi on the stock turbos, but I've had no problems and like going faster!. Best 60' time on Hoosier drag radials 225/50/16s is 1.68 .

To answer somebody's question, Yes I am very happy with the stock turbos maxed out setup! (stock sequential turbo setup)

 

I went from stock twins set @ 10psi, to a Greddy t-88.
Even thought I do deal with some lag, the car is an absolute sick beast!

The stock twins are a very nice street setup, but try getting a ride from someone that has a big single turbo in their FD and you will completely understand!

 

is 550 achivable whit the bnr twins..??? sequentially that is.. if so ill keep that setup.. if not ill go with the single.. the sigle would be easier to achive this amount but i dont wanna just be a hiway runner... ya know..

 

550? Are you on crack? These aren't supras man--I'd venture to say that less than 1% of all FDs in the USA make more than 550 rwhp, and a majority of those are not street cars.

In order to make 550 on a 13b, you need to run somewhere in the vicinity of 25 psi. That is not an easy or inexpensive task......

 

one potential advantage of the twins is they can theoretically produce more torque at lower rpm, I know Bryan told me he put down 360 rwtq with his Stage 2s

I have the "official" last set of Stage 2s Bryan will ever produce (along with a David Garfinkle custom ported manifold), and I can you this set-up spools extremely fast and the boost is ultra smooth, I'm not missing the sequential twins one little bit

I'm still breaking the motor in, so dyno numbers will have to wait...as Rich said, it's been a long road getting here

 

So i guess i'mma have to switch my whole mind set then. Single for HP Seq Twins for fun.......I want HP!!! so....will a T-88 Be good??? I mean...I'll upgrade everthing to make the turbo make the hp....what will i need for a powerful set up?? 5-600hp?? Are there anyways to make that much tq from a rotory??

 

I really feel like you have a lot to learn when it comes to rx7s, performance cars in general, and basically think you don't have a grasp of reality when it comes to these things.

An FD weighs anywhere from 2650 to 2800 pounds depending on mods, and has a 4.1x final drive ratio, not to mention a 0.29 coefficient of drag. All this means that you don't NEED 5-600 rwhp in a street car to be fast.

Sure, you can run a t-88 and have a powerband from 5k to 8k rpm, if you consider that fun.

I suggest you get a ride in a well-set up 400 rwhp FD. I guarantee you it will be plenty fast for you. If it's not, I suggest you go purchase a crotch rocket and be done with it.

Rich

 

All good points, Rich.

 

ok....a couple of things first......I know everything you pointed out about the 7......I also know about power to weight ratios.....what YOU don't know is why I want plenty of power.... A friend of mine has a 79 Porsche 930 pushin 630rwhp. This is my competition. his car is about 2400-2550lbs. Yes a real Rocket Ship. So I know fast and powerful.....My question is; how can I get high HP without the sacrifice of the seq twin setup....everyone put their input and the basic conclusion: only a single will let me achieve this goal of high hp. I feel you on your POV Goodfella, good lookin out. but i know what i want out of this car because i know what i want it to be like......I'm not just somebody who is horse power hungry for no damn reason. I believe in Skill before Speed. but the fun in the FD with the seq twins is unlike anything that 930 could do. I just thought I should clear some things up with yall before you all think I got this car just to be cool. Rotary engines are a marvel in every right. with that said...... All Hail The Rotary!!

 

hm.....just take ur time learning everything about the RX7. Patience is a virtue and if you want a big HP u should go for single and deal with the lag, some of the forum members send me dyno on their single T-78 which produce around 550HP and seriously with 550HP u'll be racing bikes and supras is nothing compare to the 7. if you want a dynoqueens go with the supra as supras is easy to get 600 or 700 HP on the dyno. so far i'm also still learning about different performance set up and etc and when it comes to the 7, it's an unending learning experience. just my $0.002

 

Ok, now that I know all of that.....if you want to stay rotary, your only real choice is a single turbo 20b.

 

rich, do you think is a good idea for him to go with 20B since he does not know that much about 13B, you're talking about a lot of dough just for the conversion itself and does not even involve doing the single.

 

would 450 be a more reasonable estimate of achivable power for the bnr twin setup.. running sequentially..?? the reason im wnating to get power out of my fd.. is because there is this kid running around with a viper that his dad bout him for his bday when he was in the 10th grade.. needless to say.. he has wrecked it twice.. and needless to say.. his dad fixed it tiwce.. its stock minus exhaust.. but all he does is talk crap.. so i wast to be able to post about him in the kill section one day.. and i along with most of use just have that craving for power...

 

You'll be able to easily make 400 seq and possibly 425 seq. That is enough to trap 125 mph and run a high 10 with slicks and good driving. plenty fast enough.

Personally, I have built my FD for one person.....myself. Not to get laid, not to look cool for friends, not to race some retard in a viper. In my opinion those are very poor reasons to spend alot of time and money on a car.

 

Nobody has mentioned the LS1 to this guy.....