Going to start building my car looking for input

[rx7mechusa]

Ok im looking to build up my car some to make a fun weekend car out of nothing overly incredable and im wanting to push 300-325 hp total wanting some input on the parts im g2 use and recomendations for the parts i havnt located or things you see im not doing right.

Engine-
radiator- Koyo R-core
turbo- Garret GT35R
intercooler- HKS type-s front mount
downpipe- HKS
bov- HKS SSQV
intake- HKS filter on TID i made a while back
ecu- Halteck E8K plug an play for S4 from mazdatrix / any suggestions here? not sure what i want to do here was also wonding how far i can go on stock ecu and fuel i assued 250hp was max on stock ecu and fuel but am not sure.
fuel- again not sure here pump for sure but can i get to 300 on the stock inj?

Exhaust-Apexi GT-Spec

Suspension-
coilover- Tein Flex
bushings- not sure who to get from would like some recomendations

Drivetrain-
clutch- ACT

Electronics / Gauges
boost - HKS
boost controller- HKS
water temp- HKS
A/F R- Innovative (LC-1 harness and gauge)

This is what ive got so far any and all comments changes and recomendations and anything you think i should be looking at and am not please tell me.

[djmtsu]

Sounds good Josh. You and I have nearly the same goals in mind, albeit with different brands! Lol.

[djmtsu]

PS- I'm stealing those wheels.

[rx7mechusa]

haha if i ever decide to take'em off you got first dibs on'em if you still want'em

[RETed]

It sounds like you're too stuck on using prefab'd parts...
If I were you, I would get over trying to buy stuff over the counter.
Yeah, it's nice to brag you're using this and using that, but you're just making things harder on yourself on this build.

1) That HKS downpipe is not going to bolt onto the GT35R.

2) I dunno what a "E8K" is?

3) Stock injectors will not support 300hp.

4) Stock ECU is just about it's limit at the 300hp - 325hp level you're looking at, but couple the stock ECU with an S-AFC device can work (with larger fuel injectors).

5) Don't bother with the APEX'i exhaust - it's necked down to 65mm in the front to mount with the stock exhaust; you're choking your exhaust system.
If you insist on the A'PEXi N1 muffler look, just buy the muffler - get a custom 3" exhaust build from your local muffler shop.
At the same time, have the muffler shop make you a custom downpipe insteading of modifying that HKS downpipe, cause you're going to need it to fit with the GT35R.

Do you actually have these components?
A lot of stuff is big bucks - i.e. HKS, Koyo - so if you already have it, I can understand.
Those eBay IC cores are cheaper (sometimes under $100) and do just as well, if not better than, that HKS Type-S IC.

If you do go with the Haltech, who is going to tune it?
Are you going to haul the car to some tuner to have them tune it for you?


-Ted

[rx7mechusa]

Ok ted i have alot of the stuff already and as a note im deployed to afgan at the moment so money isnt that big of an issue atm. Exhaust came with the car, gauges, boots controller, koyo rad, Tein coilovers are waiting on me to get home. Only thing's i havnt bought yet are the turbo, manifold, injectors, FMIC and ECU couldnt decide if a true stand alone was needed or just a fuel piggy back system. Yes i realize alot is just bolt on parts and as for tuning the haltec i honetly am not sure yet. I want to have it tuned at a shop first then learning the basic's of using the software and what all is required to do some tuning myself. As for modifying the downpipe it wont be an issue i have a few budies that work in the machine shop on the base (made my block off plates for me) that can help me fab whatever will be needed. What injectors do you recomend and what ecu setup would you recomend? Also the turbo is fairly expensive so im waiting on that one until i get home in Dec so i have alot of time to plan for exhaust issues and my plan was once the GT35 is in to run a true 3in exhaust 275-325 is my goal for HP now that ive been looking more at how much ill actually be driving the car

[rx7mechusa]

as far as moving my car around its no issue i have a car trailer and a suburban that i use to move when the army decides its time for me to PCS

[rx7mechusa]

Ok figured out how i want to do the GT35R with downpipe taken care of A-Spec GT35R T4 kit and once that comes in ill custom the exhaust minus the N1 muffler from the apexi GT spec thats on the car now. Still not sure how to go about the fuel yet bosch 044 fuel pump and im looking for rails and injectors now. any thoughts on this and ecu?

[RETed]

Okay, you can use most of the A'PEXi exhaust, but you need to hack the front part of it off.
Like I said before, it's a 65mm flange in front to mate with the stock catalyic converter (exit).
65mm is smaller than 3".
With the GT35R, a 3" exhaust is recommended minimum.

Fuel injectors...
1600's used to be popular, but I haven't seen them recently?
Anyone can help with this?
The Haltech has no problem firing 550 stock primaries and 1600 secondaries.
550 + 1600 is good enough for 400 no problem.

Stock fuel rails not a problem.
They will handle 400 no problem.
You'd need to worry if you're going for 500.
If you're looking for something to modify, you can convert the rail to parallel flow and run an aftermarket FPR like SX or Aeromotive.
http://fc3spro.com/TECH/MODS/FUEL/fsystem.htm
This is not cheap!

Good luck and stay safe over there!


-Ted

[rx7mechusa]

Ok ill keep that in mind about the apexi exhaust and once i can get under the car again ill look to see how it'll fit and were i need to hack it off at. Ill start looking around for some 1600's. what is the max i can get to on stock injectors until i can locate some better ones? say 225-250 ish? again i am only shooting for 300 and was also wondering about doing a greddy intercooler pipe kit and using a regular IC? what do you think of that?

[RETed]

Check out the rx7.com fuel injector calculator here:
http://rx7.com/cgi-local/2ndgencalc.cgi

Keep in mind that the resulting numbers are BHP FLYWHEEL HP numbers.
Knock off 15% for most DynoJet numbers.

550 + 720 will get you maybe 250hp at the rear wheels.

I dunno where you can get just the GReddy IC pipes?
GReddy only sells full kits.
You might get lucky finding someone parting their kit though...


-Ted

[project86]

have you actually heard that muffler yet? cause i think they should call it something different than a "muffler" haha. i have an N1 and expect loud.. and i mean loud. maybe not as bad for you cause the turbo is gonna kil some of the noise but just a thought to think on

[rx7mechusa]

haha noise isnt an issue for me i work on helicopters im deaf anyways How would the Rtek and duel 720's work for 300hp?

[rx7mechusa]

Ok been doing some research and ive decided that i am probably going to go with the Haltech PS1000. as for inj probably 550/720 to start out with.

[rx7mechusa]

Thanks alot Ted for that calculator how hard do you think this set up 550cc primary 1600cc secondary (as you mentioned before) on a Haltech PS1000. I actually found a couple of sites that will sell just the elbow and pipes but i found a reasonably priced HKS one today that im g2 pick up. Who makes good 1600cc injectors? I read some stuff on the "other" fourm today about marren (not sure thats exactly right) i have changed the build some in other ways aswell talking with my buddies in the machine shop here they say modifing the apexi exhaust to become a true 3in wont be a problem. Also what fuel pump do u recomend ive read good reviews about a few bosch 044, walboro 255, and one on rx7.com