SP_Rocket

Newbie here with turbos, I've been reading and reading and I've come to the conclusion of....I need help.
I have a 93 fd rx7 and I want to go single (my cars stock). I know I have to get a lot of supporting mods etc. but I want to pick the turbo first and build from there. I want a (I'm going to sound like any other newbie here) a fast spooling turbo that gets me to 400hp without having to boost 30psi and without pushing things to the limit because I want this for an everyday, reliable, evo killer lol. The GTX30R so far is what I'm leaning towards but still not sure?
Any suggestions? Thanks

thewird

iTrader: (8)

GTX35R with a T4 1.0 divided turbine housing and a matching divided manifold. Twin wastegates on a fully divided manifold if your ballin to get even more turbo response. 3.5-4" downpipe/ complete exhaust also helps but even just downpipe helps.

thewird

SP_Rocket

A gtx35r t4 isn't too big? Because I want this to be a quick spooling street monster.
(I plan on investing about 15k in the next 5 years or so, little by little though because I'm not ballin lol)

thewird

iTrader: (8)

Anything smaller then a 35R would have to run a lot more boost to hit 400 rwhp. The 35R is quick spooling.

thewird

SP_Rocket

Ohhhh gotcha! So running that turbo would still give me that low end and keep pulling up top? I was also thinking of running a 3" exhaust. I already have the down pipe and mid pipe in a 3". I'm thinking about going with a magnaflow exhaust, something that flows and that has a deep tone rather then hearing a super loud obnoxious sound.

thewird

iTrader: (8)

It'll come on around 3,200-3,800 RPM depending on how efficient the rest of the setup is. Get a 3.5" downpipe if you can.

thewird

SP_Rocket

Just a 3.5" down pipe or I also switch the mid pipe and exhaust to a 3.5"?
What does the 1/2 inch contribute to? Faster exhaust comes out means spool is faster?

SP_Rocket

And you say 3,200-3,800 rpm is when boost starts or is that peak boost?

thewird

iTrader: (8)

Faster spool and stronger powerband.

thewird

Turblown

iTrader: (12)

Turblown Engineering FD3S RX-7 Turbo System

SP_Rocket

(Turblown) wow that pretty much exactly what I was looking for! Running about 15psi and getting around 400hp!!
Only thing is, is there a way to get the turbo to kick on a little sooner? I noticed in the video it's pretty close to about 4k rpm before it starts to spool and make power, any recommendations on other supporting mods to make it spool a little faster?? In the street I hang around 3k rpm and floor it from there.

No_love_for_pistons

iTrader: (4)

Then that should give the other guy a fighting chance.

SP_Rocket

I don't get it? Lol

Grinch

iTrader: (2)

Look at turblown fb page has a boost plot chart for that turbo kit. It spool pretty fast

Turblown

iTrader: (12)

Here is the boost plot of the last car I tuned. A lot of variables affect the boost threshold and response.

Speed of light

iTrader: (8)

^^^ Turblown, how was the car being loaded to achieve that response?

SP_Rocket

Wow that is impressive.

SP_Rocket

So that's all I need to know is just tdx61 turbo? Or are there different tdx61 versions?

Turblown

iTrader: (12)

Mustang Dyno rollers, no load control. I built another that did identical years ago, and response on the street was identical to that dyno also.( dynapak ). Several end users here who have followed my advice have achieved the same results.

turbomaniac

iTrader: (7)

Sorry newbie here to rx7's, so what is being stated is that the tdx61 T4 turbo with supporting mods like , wide down pipe, a solid wastegate and manifold with a Unrestrictive exhaust and obviously proper fuel setup is one of the most efficient ways to make 400+ hp with a very responsive powerband start at 3k +? And I didn't know that mustang dynos could produce load like that of a tire balancer