Trots*88TII-AE*

iTrader: (11)

Figure I should finally post up a build thread, pics to come. Story first: First car I bought was an RX-7 when I was 15, fell in love immediately. It was an '88 base model in charcoal grey/burgundy interior.

For a long time I was trying to figure out what to do to get the power I wanted out of it, until finally giving in and looking for a TII. Sold the N/A, and was on the search.

A couple months later, I found a 10th Anniversary TII in Indiana on e-bay, ended up winning it for $2600, but had to have it shipped up to Ontario. By the time I got it home, it cost me close to $5000, but it was fine, it runs, just has a blown turbo. Well, I learned my lesson.

Engine ended up having chewed an apex seal in the rear rotor, and me in my youthful wisdom thought no problem, I'll rebuild it and port it myself. Well, 3 years later, I just finally picked my car up from RPM in Breslau, had Joe clean up the porting and put the engine together for me. Too many hours, too little confidence for me to have done it myself.

So, as it stands now, engine is in car, running on a Microtech LT-8s base tune. Engine is all S4, streetported with a corksport turbo-back with titanium can. Turbo is the "HKS Sports" upgrade, T04E "57 trim" 0.50 A/R comp. and .84 A/R O-Trim (66mm) turbine.

Additional crap:
AEM wideband
Autometer gauges (EGT, boost, oil temp, oil press, water temp)
FC3000 ignition amplifier
Taylor racing 10mm wires
Turbosmart E-Boost2 EBC
Centerforce DF clutch
Walbro 255



So far, plans are to get a larger compressor cover and the compressor wheel from a GT35R, install my snow performance alky injection, mix 75/25 meth/water and run some serious boost.

Now for a few questions: Does anybody have experience with the Kenne Bell boost-a-pump? I'm wondering if it would be adequate enough with the 255 to supply fuel for 50-55 lbs/min (what I'd like to eventually run with the 35r wheel) using stock lines/rails/FPR???? From the flow tests I've seen, a 255lph pump @ 60psi on the BAP can run 290 lph. Is this realistic though?

A few pics of the engine: http://s256.photobucket.com/albums/h...010AE/?start=0

'90rps13

you should link in the pictures. great start though

Trots*88TII-AE*

iTrader: (11)

Alright, so did some looking into it. The Kenne Bell BAP can put out 290 lph on a standard 255 Walbro at 60psi, tested and documented. I have 2x 550cc primaries and 2x 1680cc secondaries, altogether making 4460 cc or ml/min. so 4.460 L/min x 60 min/hour = 267.6 LPH max flow at 100% duty cycle. Pump should be A-OK, although this is just theory... And, along with my twin 375cc meth injectors (running 75% meth/ 25% water, essentially making them 280cc injectors), according to RX7.com calculators (on stock ports) I should be able to support 660 hp at the flywheel, which is more then enough for any amount of boost a 35R can put out. I'm really looking forward to getting on the alky train.

Here are some Engine pics:






My ALS seals, looking forward to seeing how they do.
\

Studly engine.

Joe's awesome porting skills!


And for the car:





Anybody else ever seen a stock Mazda radar detector? "I swear officer, it was a standard option!"


hideous.

Trots*88TII-AE*

iTrader: (11)

Lots of stuff

Money shot, almost...

So much to do over winter, so little time.

-Have to get the idle tuned to a little less fuel, and get it to coldstart
-Install the plethora of gauges
-Mount the MT and have a data cable permanently mounted in my CF surround
-Cut out the CF surround
-Put on some new leather seat covers
-Install the Meth kit
-Put on my new pads/rotors and ss braided brake lines/clutch line
-Mount the exhaust properly
-Install the FC3000
-Install the S5 Lower FD UIM's
-Buy/install the Kenne Bell B-A-P
-Possibly buy/install a J&S box
-Start planning out my V-Mount setup, install my new (to me) Rad & Oil cooler(s)
-TUNE THE BIATCH!

Trots*88TII-AE*

iTrader: (11)

Alrighty, so been a while since last update, got the car on stands, turbo off, new turbo came in, etc. Got the makings of a GT3574 turbo now, just need to port the hell out of the wastegate bores, get the Vmount going, and finish installing everything. I gave up on trying to get it to start and run better, since it's -30 out. I'll wait for some realistic driving weather to work on the tune. Some more pics; Santa was good to me!

A big mess, waiting on the dual 19 row oil cooler setup, Intercooler and Shine FC2K bumper.



Gotta love the yellows! Just waiting on my GC's to come in along with Camber plates and rear camber link.



A cluster-**** of turboness! gotta get the right parts sorted, balanced and dropped back in. Specs are: 82mm 35R compressor, 0.60 A/R cover, O-trim 74mm turbine wheel, 0.84 A/R split T4 hotside. Will be porting both wastegate bores to 28mm each, roughly equivalent to a 40mm single wastegate.



Bigger is DEFINITELY better. 0.60 cover compared to old 0.50 T04E cover.



A couple little goodies to help out.




EGT and AFR gauges installed on A-pillar.



Oooohhhh. Aaahhhhhh. So puuuurrrtty. Pictures really don't do these wheels justice.



Less than 16 lbs for the 17 x 9's. That's A-OK in my books. (15.9 lbs from Enkei.com)





Still left to do:

Install Turbosmart EBC, B-A-P, and Safeguard.

Install remainder of gauges (Boost, water & oil temp, oil pressure)

Order intercooler, fab up Vmount.

Decide whether or not to run the DC EWP, and if so to order the controller.

Order and install second oil cooler

Find me some rubber

Re-finish seats.



so much to do, so little heat...

RxFuel

iTrader: (1)

nice, sweet pics.... I may have missed it but what kind of exhaust is that?

K-Tune

iTrader: (26)

what parts of the HKS turbo/manifold do you have left? i'd like to buy them.

Trots*88TII-AE*

iTrader: (11)

Exhaust is a corksport PS 80mm with Titanium muffler.

I'm actually re-using the HKS mani, with the stock HKS hotside (0.84 A/R and 74mm turbine) and 35R wheel, all I will have left is the T04E 57, 0.50 A/R compressor mated to the Precision 0.69 A/R T4 (undivided), 70.1mm turbine

The Griffin

That's kind of a mismatch using a smaller "O-trim" exhaust wheel with that large a compressor wheel. You are going to have fun I suspect trying to get boost creep under control even if you port the snot out of the HKS internal gates. It probably can be done but you will have to do like "Blue TII" and cut a hole in the turbo backplate and weld in a 2 inch weld-el for a separate wastegate dump. Probably even disconnecting the internal flappers,porting the passages to an extreme and using a external wastegate on the 2 inch dump tube like "Blue TII". Doable but not worth the effort to keep the HKS sport kit over a typical single/external wastegate setup.That's assuming you open up the intake and exhaust,if you restrict either/or you may be able to keep the creep down with just porting the holes as you mentioned,but that would defeat the purpose though.

Trots*88TII-AE*

iTrader: (11)

Well, considering a few things:

A) Stock GT35R turbine wheel is 68mm (inducer)

B) Stock GT35 non-ball bearing is 68mm (but with a smaller 76mm compressor wheel)

C) A-Spec's proven GT3574 uses a 74mm turbine (not sure which trim)

My Garrett (HKS) 74mm O-trim should be just fine.

I'm not sure what makes you think that this is a mismatch, or that the o-trim is smaller in comparison to what?

I would hardly consider choking a turbo as a solution for any setup in the purpose of controlling boost creep. I might as well just put a limiter on the throttle or purposely de-tune it.

I'm going to be porting the passages out to 28mm each, weld on some new flappers to fit, which will give me the same amount of volume as a 40mm single wastegate.

I also plan on eventually sealing off the turbine from the wastegate, and either venting to the atmosphere outside of the turbo backplate, or creating a divorced downpipe.

I'm using this setup both because I already have it, and I'm curious to see how effectively it can control boost if done right. Regardless, it will still be cheaper than buying a new mani and WG.

Trots*88TII-AE*

iTrader: (11)

But I get what you're saying, it is an inferior design, and boost control will be a challenge. I just kind of want to see how far I can take this turbo, and then decide whether I'm going to be focusing more on power and drag racing, and get a considerably larger turbo, or whether this is enough power, and get something decent along the lines of a 500r or BW S362.

HAI-TEK7

iTrader: (31)

I dont understand how you say its a mismatch? The wheel diameter ratio for this setup is 1.108 ,and from what i have read that is very good. Correct me if im wrong, b/c I know the Griffin knows his stuff. Also the o-trim is only smaller on the exducer side of about 3.098mm from a p-trim. i dont think that compressor wheel is to big for the o-trim.

The Griffin

Mismatch may not be the right term I was looking for, normally in most all T4 setups it's a "P-trim" exhaust wheel 2.544" exducer/2.922" inducer you see used on a rotary. The "O-trim" 2.296" / 2.922" is 0.248" (6.3mm) smaller on the exducer diameter. I think you were posting the radius differnce ? They are both 74 mm(2.922") wheels but the "trim" is different ,the O-trim being 69 and the P-trim being a 76 trim wheel.

Just looking at how much "Blue TII" had to port out the stock S5 hotside with a clipped P-trim/60-1 comp. wheel and external 60mm HKS wastegate on a separate dump tube ,it most likely will be similar to what Trots*88TII-AE* set-up will need to be.

The Griffin

Give it a go, should work. It may be a little extra work to get it to the point you would like. You have a nice build going on. I like your choice in wheels should look really slick in white with the 10th AE , I'm running the same type enkei' RPF1's just in silver.

HAI-TEK7

iTrader: (31)

Your math is right, i did a quick google and the spec of the o-trim i got was wrong. Yes, i understand the trim differences.

Yes Blue Tll put alot more effort than i would have to fix his creep.

I'm going to run a similar setup with the HKS sport kit, there is no way that I would go that extreme to what Blue did, but i would step up to a p-trim wheel if it was needed. I am going with a divorced DP. So Trot get your stuff together so i'll know what Im getting into

Trots*88TII-AE*

iTrader: (11)

Haha, I've been waiting on you!!! I'm going the easier route, instead of divorced DP, I'm thinking to just seal off the turbine, and vent the WG's open-air with a 90 degree bend or something. Gotta love the sound of a rotary wide open scream through the WG!!

And Griffin, you're saying that Blue TII has an S5 hotside, do you know off-hand what the max stock diameter you can go on it for WG holes? The stock flappers on our HKS kit are nearly about an inch in diameter each, but I'm thinking to go further (28mm each). If it works, great, if not, well it'll just mean I need to go turbo-shopping sooner! If I can get 400-450whp with a bit of alky, I'll be thrilled.

HAI-TEK7

iTrader: (31)

Haha, I thought about that too but im getting old. Open WG aint my style no more.

Blue Tll's hot side was hogged out that you can put your fist into it. I found the thread, but no pics. I think i might have some pic of it on my pc at home.

https://www.rx7club.com/showthread.p...ight=wastegate

TehMonkay

iTrader: (-1)

Eh, I'd buy the bosch 040 http://boschfuelpumps.com/

No pun intended.

Trots*88TII-AE*

iTrader: (11)

Then it's possible that the problem doesn't lie in the size of the wastegate bores, but in the internal design itself. I guess I'll have to wait and see how bad the creep is, if it's too big an issue, I'll move to a different manifold and WG setup early than expected.
I'm going to see if the walbro and B-A-P will cut it first, if not I plan on getting the bosch or Denso unit.











Eh.

The Griffin

You can port them out to the ends as long as the gate valves still cover the holes. Here is a couple of pics of Blue TII's modified S5 hotside. IIRC he mentioned that he had to hog out the manifold runners also(seen in the pic) increasing the lag slightly a couple of hundred rpm's. The T4 hotside/HKS manifold I'm guessing is less restrictive then the S5(even being a smaller A/R ratio) so it's maybe an apples and oranges comparison. But I'm also guessing the effort is not going to be far off from this to control the creep plus you are using an even larger compressor wheel.

Trots*88TII-AE*

iTrader: (11)

What I was asking was the physical size extent the S5 manifold could be ported to, in comparison to the HKS unit, but the pictures show. I'm going to have to get new flappers for the valves in order to do my planned 28mm/valve.

And A/R is only proportionate to the size of the turbine housing. A 0.69 A/R T6 GT45 will flow much more exhaust volume than a 1.00 A/R T25 turbo..

The T4 HKS unit is obviously larger than the stock S5, and can flow a deal more. We'll see how this comes into play with trying to control boost. I'm not hell-bent on making this setup work, it just happens to be what I have for the time being, and I plan on tuning for the high boost with Meth/H20. Who likes being below 20 psi anyways?

Battle Cat

iTrader: (78)

Sick Build!!!!

waxball88

Coming along nicely. Should be a "fun" build. Best of lucK!

Trots*88TII-AE*

iTrader: (11)

Yeah, it's my first build, so I've been learning alot along the way. Hind sight is 20/20, there are a lot of things I should've just waited for and done properly from the beginning (I.E. proper turbo set-up). Meh, live and learn.

HAI-TEK7

iTrader: (31)

I wouldn't go that far saying that setup isnt "properly", i like the word "hybrid". Yes, its going to creep, but how much? Dunno. So put your stuff together and get going!!! So we both can stop "wondering". All it takes is one pull in 3rd....mmmmmm Boooost!

Plus you got meth! compensate for it!

I'm really liking your build, those wheels are sex, and to top it off its a 10th.

Game over.