z-beater

*Warning this thread is long*


Hey guys I have been searching for months now. I decided about 3 months ago that I was going to go single on my project so I started to research straight away…thus being said I wanted a few of the experts to chime in a give me a helping hand. (sorry came from the n/a v8 world where turbo’s are not as common)

So this setup is for my se:

Engine:
-13b-rew with stock ports(at least for now) about 50k on engine rebuild after it is tuned.
-all the appropriate mods to go single

Fuel system:
-Bosch fuel pump maybe Aeromotive 1000(what are your experiences?)
- 850 primaries(possible 720’s I have both )
-1600 secondaries
-FPR with gauge

More specifically I have been looking at the rx7store.net package for 625. That would set me up with everthing but the pump.

ECU:
-power fc

I am sure that I have forgotten something but I am pretty sure that I am on the right track. Months of searching does help out…it sucks but well worth it. Probably wouldn’t have taken so long if I knew anything about turbos…lol huge learning curve.

What I am trying to achieve:
This car is not a daily driven car. Actually it only gets driven about 3k a year and it never ever sees rain, which here is Washington is pretty rare for a car. It is a street car though. I want to run pump gas and only boost to about 12-15psi on the street(max) 10 normal driving. I want 400rwhp at 14-16psi. Might boost to 19-20 once or twice to just see what it can do. I want a fairly conservative tune and as you can see have taken the fuel system extremely seriously. No 1300’s here!

Types of turbo’s:
There are 2 turbos that I have been looking at the gt40 blowzilla and the to4r. I would really like to purchase new and would like to buy from cheapturbos.com since they seem to have a good rep and people are happy with their product.

I am looking at the different kits that they offer. They can be found here:
http://store.yahoo.com/cheapturbo/packagedeals.html

GT40
Pros:
1700 kit price
seems that it will produce the desired amount of hp

cons:
heard that they are hard to get replacement parts for. Ie you have to buy a whole new turbo

To4r
Pros:
Produce a good amount of hp
Easier to repair
Flows more air

Cons:
Might be too big…laggy
More expensive no need in paying more

So please help me out. I am extremely tired of searching!
Z

7knight

look in this section about a-spec's GT35R, it's probly the best match for the power that you're looking for.. it's a very quick spooling turbo and should give you 400rwhp at 15lbs.

i looked at the link that you provided.. but it doesn't seem like you get a manifold or a downpipe... i mean, i think it's a great price for whats still missing...

z-beater

For me that is ok...it is going into a SE so all of that has to be custom made. I am not sure if purchasing a kit with a manifold will fit but it is better to play it safe. I also be re-doing all the exhaust with 3" from the turbo back. So as I said I am not too worried about it.

Since I am going with a fairly large single I would rather play it safe and have one custom made so that I don't have to worry about fitment issues. I still have to talk to some people that have gone single on a se but it seems that they all go with custom tubing. When it comes down to it there is not too much information on a se swap since the swap is quite a bit more intense then the s4/5 drop in.

I will check out the gt 35's maybe a-spec will chime in. All the threads that I also read people seemed to be happy with their turbos. Seem to be a pretty good outfit.

I also do not want to turbo to run out of steam. If I ever want to go more I want to tune with race gas and the turn of a ****. No turbo swapping etc. One setup good results! I find that when you do a good amount of research you do not usually have to change out turbos that often. Unless they break of course...

RotaryResurrection

iTrader: (8)

I think I'd look at a t78, which seems perfect for what you're asking about. Most people put down 400-415 at 15psi, yet the turbo works well to about 22psi if you feel the need to crank on it. You can buy a quality bolt on kit for 3 grand.

z-beater

See that is also another one of my problems. I do not want to buy a 3rd gen complete package since I cannot use some of the parts. The t78 was one of the turbos that I was seriously looking at. And it made it to the "finals". I also liked that there was a huge amount of support for this turbo on the rotaries. The kit that I am looking at is 2k minus in piping, manifold and other fittings. Probably close to 2500-2700 when I am done.

RotaryResurrection

iTrader: (8)

As long as it's going on an REW, you should be able to use everything but the downpipe...but you'll need a downpipe to begin with anyway, to modify to mate up to whatever you have on the rest of the car. Hell, if it were me, I'd rather stick the t78 downpipe on, and provided it clears the floorpan and such, the *rest* of my car's exhaust is likely what I'd hack up...that way should you decide to go with a different turbo or setup altogether you can sell the unmolested t78 kit to some FD owner and get the best resale possible.

z-beater

Yeah that is a good point. I just saw the r85 kit that kgparts offers. Any comments on that one? At 25psi it produced over 600hp. A little more than I want but has the potential

What is a good place to find that t78 kit?

RotaryResurrection

iTrader: (8)

I think some folks are a bit disappointed by the much hyped r85. The quote I read was 415 @ 17psi or something, none too impressive...perhaps there was some other issue. Do a search on that and correct me if need be.

I think rx7store.net has the t78 kit for 3100 right now.

z-beater

hmmm....looked on kgparts site and they had a dyno sheet at over 400 at 15psi. The kit at rx7store is 3400. A little more than I would like to spend. I am on a little of a budget too. I want my build to be under 9k. And with the other parts the turbo and other corresponding pieces has to be under 4k. Granted that this does not include the fuel system which will add up to about 850-900. So you can see my dilemna. I purchased a front clip for 3k so I have 6k to work with for the rest of the swap. And that would be about 4k for the turbo setup...give or take.

With the t78 I do not think that I could achieve these numbers...

RotaryResurrection

iTrader: (8)

recent r85 dyno 15psi 400hp

https://www.rx7club.com/showthread.p...no#post4654861

z-beater

I started reading that thread when it first started but did not see that dyno. Oh well false hopes...3 months...you think that is plenty of time to find a turbo!

7knight

haha, 3 months, i've had my FD in the planning or 3 years.. i finally got my exterior figured out and now i'm looking for a turbo as well...

z-beater

Man you are slower than a slug...every free waking moment has been concentrated on this swap. If I am not in the garage working, I am on the computer reseaching. A large portion of that time has been either looking at the turbo system or the turbo setup.

cmartinp28

well... since you have 50k on your engine, and you're going to slap a turbo on there to make a lot of power with your stock ports, i would go with something easily rebuildable since i dont think your car will last very long with the power you are expecting. i hope it does, but once you blow the motor, the turbo will most likely go with it also.

most of the single turbo kits out there, including smaller kits like gt35/40, to4s, 60-1 will produce the numbers you are asking for. if you are only going to high boost only "a couple" of times.. then stick with something smaller. they would probably the most fun to drive because of their responsiveness.

7knight

i would agree with cmartin.. your motor might not last very long, mine needed a rebuild at about 80k miles...

i'm not jus doin the motor my friend... i've stripped the paint down to the metal everywhere and doin a custom paint job..

but the turbos stated above would be great for what you're looking for...

Broken09

iTrader: (1)

You'd definately be happy with A-Spec's 35r kit. I just dyno'd 436 at 16psi on pump with a street port. Driving around on the street I have 16psi by 3500 rpm. Definately a blast to drive. Not to mention A-Spec's customer service is top notch!

edit:: Forgot to mention I have the T4 35r

z-beater

Yep I know just joking with you. Trust me I know how long it takes to do these projects right. Not to mention that we have to fit it alongside all the other stuff that we have to do.

I looked into the 60-1 and really was not partial to it. I would really like to go with a bigger turbo. The key is high hp on low boost. Lag is not too much of a deal for me.

As far as the engine goes I am going to get it rebuilt after the tune. All the people I have talked to said that this was a good idea since i could tune the engine then pull the motor again and rebuild it. No break in etc. The car would probably would hardly see street time even if at all. Maybe the drive back from the tune shop.

I will look at the 35r's a little harder. All the dyno's that I have seen though were not producing the numbers that you have achieved. Maybe I was not looking in the right place though.

Thanks guys...Any more?

su_maverick

I guess I am a little partial but I love the TO4R. I got a chance to drive one before I bought my kit and I think its a great turbo for a multi use car. The lag is minimal at worst and it produces a good amount of power at low boost. Its very similar to the T-78 except its not made by Greddy (which may be a good thing in some people's minds). My advice would be to see if you can get a ride in some cars with the turbos you are looking at.. it can make a world of difference in your selection.

RotorJoe

You should have cornered me and I would have given you a ride.

You may not need the 850s as primary injectors. You may run into low end cruise issues because of those. Yes it can be tuned out, but I hear its hard.

A nice Walbro or Supra pump will due with 1300cc-1600cc injectors up top.

Being that this is going in a first gen you may not need a big boy turbo. You may have better luck running a smaller one so you build boost quicker.

Joe

Red Star

the t78 seems to be more popular. i guess cause they seem to make alot of power at mid to high range rpm

z-beater

Joe I will have to have you give me a ride in your car now that the single is done. It might give me a better idea of what I am looking for. Too bad maverick I would really like to take a ride in your car. I like the idea of taking a ride in a car that has a similar setup...hard part is finding one.

I have also heard about that joe. I could always use the 550's and just get 1300's in the secondary rail. I hate running the extra risk of not having enough fuel though.

This is strictly a weekend and summer driver. Like many of you it is now my money pit.

Joe by the way it was good to see you this weekend. Long time no see.

7knight

when you say your gonna get your motor rebuilt, to you mean with porting done as well? if that's the case, don't expect huge numbers when you strap on a big turbo.

RotaryResurrection

iTrader: (8)

Yeah, because porting decreases power potential so much...

z8cw

All these turbo will push enough air efficiently for your boost goals. The larger the turbo the more lag and the more boost potentiell which will ultimately lead to more power. Don't get so hung up on the right turbo. General rule "go as small as you can for your boost goals". A larger turbo doesn't make more power at lower boost, it actually can make less if you run into surge issues or haven't reached the optimal efficiency range. That said, most of these turbos will produce a similar power to heat ratio in our boost to flow range, so this difference isn't of great importance. 10 psi is 10 psi, the difference is how quickly you can build it. If it is a street driven car that will make a big difference since I doubt you can stay in high revs or slip/drop the clutch on every light. If you live at altitude you generally need a turbo that can tolerate a higher pressure ratio.

z-beater

Yes porting will be done...lose power? what? I think that the gt40 or the a-spec will be quite sufficient for my goals. Thanks guys/gals. I appreciate your help.

I will keep you guys posted.

Z