480 hp, 456 tq, BIC twin gt28r turbo's

[becauseican]

Well I finally got the E-manage installed, with all options, fuel injector harness, ignition control, pressure sensor........ Other mods are custom BIC twin GT28R turbo system, twin 2.5" downpipes, HKS Highpower exhaust, BIC top feed fuel rail, 550's, Turbonetics IC, Tial BOV, Mines ECU.

On 94 octane pump gas, at 14psi I made 378 HP and 372 TQ.

At 19psi, pump gas made 446 HP and 437 TQ.

AT 21 psi with 4 gallons C-16 made 480 rwhp and 456 TQ.

I was able to make about 30 hp more just by playing with the timing at the same boost. I could have easilly hit 500 rwhp but I blew my boost controller hose off and didnt know about it , it started over boosting so we called it a night. I must say the E-manage works very well with the 1JZ and esspecially with a tuned ECU ( Mines). I will post up the sheets soon. The curves are very nice with a big power band.

Pump gas runs.

 

[group a supra]

well done sir :naughty:

 

[Dew511]

Damn! I want! I want! Keep it up. Im trying to get my hands on a upgraded ECU too. Anyways again... good numbers.

 

[Loki]

Nice numbers Randy, your car is a work of art

 

[derK]

so which is faster?? your old 7m setup, or your new 1jz setup??

 

[kylemartin]

nice! Precision turbo and engine makes some nice bell mouths for the GT-28R

i have one on my turbo.

 

[Troyota]

How does this set up feel on the street? Aproximately how much did the set up run for all the extras...I know you are tossing around the idea of marketing the Kit, but I'm curious about the entire set up (fuel management, delivery, ect.) Beyond the 1jz swap in general.

 

[becauseican]

Thanks for the compliments, The 1J is way faster than the old 7m, I went to the track last night and was doing 116 mph trap speeds. Those extra 1000-1500 rpm make all the diference in the world. The 1J is such a smooth engine, it doesnt sound/ feel like the 7m at 5000 + rpms ,it just keeps revving smoothly.

I havent added up the total bill yet, I dont really want to. I was able to sell all my old 7m stuff and turbo kit, and also lots of the extra's I got with the front clip, so I got allot of the money back.

Is that bell mouth 3", that looks sweet, I just might have to get me some of those.

 

[drunk_medic]

Now I am wondering, just how much hp/tq are those twins good for? Kits out there for the 1JZ always seem to have a single turbocharger, which I believe is the wrong setup for the 1JZ. The 1JZ needs twins running in parallel and a horsepower goal that allows it to get into and take advantage of it's powerband, no matter what the current RPMs. Your setup is probably at or near the optimum for autocross or mild street racing. I bet you are gonna have some fun.

 

[kylemartin]

Is that bell mouth 3", that looks sweet, I just might have to get me some of those.

yes

 

[IJ.]

DM: 280hp each (this is for the base model 28R not sure but think Garrett rate em at the crank)

 

[drunk_medic]

Hey, that 28R is the one they call the "Disco Potato", right? I've heard good things about that particular turbocharger - very popular with the Silvia crowd. It comes stock as the single on the S15, doesn't it? I hope those two do you well.

That's really cool - since the bore is the same, it should be feasible to do the same piping/manifold job on a 2JZ in the A70 chassis - which I may take into consideration someday. It looks like you made yours and still managed to keep plenty of room between the turbochargers, piping and the strut tower. I like.

 

[IJ.]

nope the Spud is the 28RS @ 320hp!

Then there's a bunch of hybrid 28's up to 450hp!

 

[supraturbo1987]

So gorgeous randy....simply gorgeous...

Did you get that gasket?

Trev

 

[siman]

Sexy. :love:

 

[group a supra]

ij your right again just beat me to it again :biglaugh:

 

[Troyota]

Do you think with the GT28RS this kit would have made the 600whp that you were shooting for? The GT28RS would still bolt right up to those manifolds right? And, I know it's a pretty fast spooler too...any guestimations on whether the powerband would be similar with "Disco Potato's"?

 

[GrimJack]

Damn - nice work, Randy! Methinks you are going to get even higher in short order, too.

 

[becauseican]

I will max out these turbo's first. I think they should be able to make 520-550 rwhp. I will be going back to the dyno very soon. But I only have 550cc injectors so I will be running out of fuel soon. I will probably change the turbo's to GT28RS's next year, those should make 600rwhp, but they will spoolup a little slower because of the larger wheels. The RS will bolt to the manifolds and use the same turbne housings and downpipes.

 

[trdmk3supra]

Man your set-up is sweet BIC. I am currently undergoing the 1jzgte swap in my 86.5 supra. Right now I am pulling my old N/A 7m motor and tranny. Then to body shop for paint and body work. Then be putting the 1jzgte in her and have some fun. :evil2: