serge1

Anyone here with a XS Engineering T04s Strip Kit??

If so, please post a short review. I am considering that
upgrade this winter.

Thanks all!

Cheers

Serge

Wargasm

I've got it... It's not fully tuned yet (should be within a month), but it is a great kit in my opinion. I did all the install work myself and it was pretty straightforward. The only minor "complaint" if you could even call it that.. is that it doesn't come with an air filter. Not a problem, but for the price, I figure they could throw in a K&N.

I did a street port + all the usual goodies, and there isn't really much lag I don't think. I keep the revs nice and high though (4000 or so). I took it up to KD Rotary for dyno time and started running low on fuel supply at 6500 RPM(550 primary, 1300 secondaries, 12 PSI), so we stopped it there until I could put in some 1600 secondaries. I'm getting that put together now, and expect about 420 RWHP at about 15-16 pounds of boost.

Anyway, I love it. Here are some webpages I did covering it.

http://www.zeroglabs.com/rx7/lagtest.htm
http://www.zeroglabs.com/rx7/newturbo.htm
http://www.zeroglabs.com/rx7/dynoresults.htm

Send me a PM if you want to know anything else.

Brian

Silver7

420 hp at 15-16 psi sounds a bit optimistic to me. Please post the results when you get them. KD told me they were seeing around 380 HP at 15 psi from the T04S kits.

Wargasm

I will definitely post them... Just keep your eyes peeled in the "Single Turbo" forum in about a month (I should be done by then).

Brian

blackscorpio

It depends on what you are running the turbo with. Upraged intercooler, straight exhaust etc will yield alot of power. It is possible to get 450 RWHP with adittional mods

Wargasm

Well I'm running full exhaust, intercooler, upgraded ignition, upgraded fuel, powerfc, blah blah blah all that stuff. I already have 340 rwhp at only 12 psi and stopping at 6500. It would be approx 375 if I went up to redline...

B

ek9220ps

iTrader: (4)

im planning on get that kit next month. just about everyone with the apex kit told me to get the xs t04s. but i haven't see too many dyno sheet on it. would you guy recommod that kit? hows the lag? what kind hp ? any info will help thanks

Brad

All interested should check out this thread...

https://www.rx7club.com/forum/showth...threadid=82872

v_skogh

I am a beginner on this parts.
But what how do you upgrade the ignition and fuel when you still use the power fc? and which parts do you use?

Best regards

Wargasm

Hi,
For the ignition system, I started with new plug wires from Magnecor ( http://www.magnecor.com/ ). To boost the strength of the spark itself, I got the HKS Twinpower Ignition. This unit is simple to install, just make sure you buy the wiring harness adapter for RX-7s if you want to make it a little easier. Obviously you should make sure that you don't have any existing ignition problems like a bad coil. If you do, you need to get that squared away obviously. A nice new set of plugs to top it all off. The PowerFC doesn't "see" any of that stuff, so there is nothing you need to do with your PowerFC when you do these mods.

For the fuel system, I have an upgraded pump from Rotary Performance (I"m not 100% sure that this one will support my mods yet), and larger secondary injectors in a custom secondary fuel rail. I got the 1600 cc/min Bosch injectors + rail from K2RD ( www.k2rd.com ).
Depending on exactly how big your turbo is and how much boost, the larger injectors you use might be 1200, 1300, 1500, or 1600 cc/min. Another thing to consider is that unless you're going over 1300 cc/min, most people don't buy a new rail and new injectors. Instead, they just have their stock secondary 850 cc/min injectors enlarged to whatever size they want. At any rate.. if/when you replace the secondary rail, you end up losing your stock fuel pressure regulator. I bought a Mallory 4309 adjustable regulator from a local shop to fix this 'problem'. You will also need to make some new fuel lines going to and from your new regulator to get it all plugged together.
Once you have all that sorted out, you need to tell the PowerFC unit that you put in bigger injectors. There is a simple setting in the PowerFC for the injector sizes, which I'm sure has been explained in other posts if you needed info on that.

After all that stuff is done and your other mods are all installed, don't go out and go nuts yet! That is a good way to blow up an engine. Instead, take it easy until you can get the car tuned on a dyno by someone with rotary engine experience as well as experience with your PowerFC.

If you have any other specific questions, send me a PM.

Regards,
Brian

v_skogh

You have PM

nycRedRex

i have the pfc/to4s/street port/1600cc inj. combo. Its netted me 365 rwhp@15psi (94 octane). Not too impressed with those numbers but it runs really smooth to redline. AF ratios are around 11.4 the whole way but i think i can lean it out a bit and retard the timing a bit still. Dyno showed that 6500 rpm was peak hp. I get full boost around 4500 rpm. What AF ratio is safe to run?

There was someone in Ohio getting 419 rwhp@ 17 psi. He got it up to 470 rwhp at one point but it was way too lean.

AutoX sucks now with a single. Drag is very good (12.5 1/4 mile in only third attempt). My real goal is road racing which i wanted nice power on the long straights to keep in the race. The twins were getting romped on by vipers, vettes and supras. I hated that.

joe

Wargasm

Joe,
How did you hook up the 1600s? Are these the Bosch injectors? What color were the tops? Did you use resistors?

Thanks,
Brian

v_skogh

Dont you have to use resistors to make i work with so big injectors? To PFC only work with "low OHM" injectors???

Wargasm

If you check my dyno page again

http://www.zeroglabs.com/rx7/dynoresults.htm

you will see that even on a 95+ degree day and very conservative high-rpm ignition timing (10 degrees at 15 psi) I still made about 412 rwhp at 15 PSI. I say "about" because the dyno guy had the pickup hooked up on my failing T1 plug wire on the first run resulting in some lost data.

With proper timing (and a working dyno pickup) I think that 425 rwhp at 15 PSI should be easy for me to obtain.

In response to v_skogh's question about the resistors, I did have to wire in some 10 ohm, 20 watt (other people use 10 ohm, 10 watt and it works too) resistors that I bought at Radio Shack to make them work right.

Brian

1badd7

Just got my 93 tuned w/t04s. Got 350rwhp with 10psi and 425rwhp with 17psi. I'm running 100% 110 octane!!! Couldn't run more than 17psi because the fuel pump wasn't pumping enough. Got the aeromotive a1000 and installing it within one month and heading back for one more tune!!!
Very happy with the turbo and heard great things about it!!!

rx7tt95

I'm amazed that you ran out of fuel with the 55/1300 combo at 12-15psi...I think it was perhaps your pump or another issue? There are plenty of cars putting out 400+ with stock primaries and 1300 secondaries (me included).

I'm about to swap in 850's and a second Walbro for 16psi+ runs :-)

Wargasm

Well the fuel wasn't GONE as I recall... But the duty cycles were at mid 80s and rising fast. I run fairly low fuel pressure (40 at 0 manifold pressure) and perhaps my 1300 weren't really putting out 1300 if you know what I mean.

I've got 550/1600 but at 15 psi, I'm running into the low 90s injector duty % near redline. I think the next step is 850 primaries and more pump.

Brian