Forced Induction Custom Turbo System: 2001 Corolla

That's running 10 lbs, we're using a Walbro 255 fuel pump, 380cc injectors, and Greddy eManage blue, dyno tuned on our Dynojet and using an LM1 wideband. No internal modifications, the complete turbo system including everything ran about $7000 or so (I'll have to double-check), that's a lot of money but it's ALL CUSTOM, and we are using all the best of the best parts, brand new ball-bearing turbo, high-density intercooler, and the list goes on and on, plus that includes all of the dyno tuning time, custom intercooler piping, custom manifold and downpipe, etc.

Properly built and tuned, 10psi is no problem at all.

-Doc

a friend of mine did a 1zz-fe @ 15psi, but the owners started changing parts and fecking around with it and they blew the engine

so yea, properly tuned and detonation free is the way to go

7k is OK if it's a doc tweek monster and that ammount is just parts right?

Nope that's everything, parts, labor, tuning, etc.

-Doc

1 question what kind of turbo do you use? reason I am asking is because i run at 7PSI and with no intercooler with the current T-28 BB it had a T-25 Twin Scroll but it siezed due to poor lubircation, and it took forever to spool for its size. both turbos ran at the same PSI. the only difference is the T-25 TS boosted form high-mid to top end. the T-28 BB spools at just over 2000 RPM.

GT2860RS Ball Bearing.

-Doc

Arigato Gozaeimas! or thank you in plain in english. hey its 0340 in the moring and i am sitting inside a 12 x 14 foot cage with 40 Shot guns and 60 9MM Pistols I am getting really bored and tired but anyway............

You got gun cage duty? LOL My friend would love to trade places with you. He's a weapons freak.

I've heard good things about the potato turbo. Anyone care to explain the extra benefits?

Pretty much the same benefits as a potato gun.

yes i do for 24hrs. i really dont' give a crap, all the weapons are clean and inventoried as well as the ammo so right now i am sitting behind my desk typing and its now 0500 , yes three more hours to go!

i don't know jack Sh!t about a disco potato or whatever the hell it is it seems every time they talk about it i loose track at some point.

rollatuner110, the benefits of a "disco potato" are the rev range. It hits peak boost by about 4000 RPM, if I'm not mistaken. Good turbo for low range.

Everybody Was Kung Fu Fighting

do you think you could get more than 10psi out of it?

yeah i he should but then that may require to build the engine more stronger internally, right now i know I can handle 14 psi safely but since my car is currently being used for a daily driver with two very paranoid parents about power i have it set at 7 psi. i was told that since it was modified to handle more power i could have up to 18 PSI but i don't want to push it.

Can the speed limiter be remove or set higher?

This is the GT28RS compressor map:



In addition to having an unusually wide mid-section so it's very efficient, this particular turbo is well-sized to this engine and for this power level. As you can see in the dyno chart, the turbo begins to spool at 2750 RPM (indicated by the steep "bank" at that point) which is quite low, so the low-end response is great, then reaching full boost by 3250 rpm (where the steep bank suddenly levels off). Looking at the other side of the chart, we see that beyond 6000 rpm where we hit the speed limiter, horsepower was still rising rapidly and torque still looks very good... indicating that the turbo is large enough, if it was too small then power and torque would be dropping off quickly.

Oh yes, quite easily, the only concern at this point is the engine itself. Next year we are doing a full forged rebuild, at which point will bring it up to 15 to 18 psi.

Yes, actually we could install a digital speed calibration unit to set it higher if you like.

-Doc

What are the benfits?

You're currently limited to a top speed of around 120. If you want to go faster than 120, you will need it.

-Doc

sorry tweak i thought you did a full forged rebuild on this corolla mustve read it wrong

Yes, lets do this. Lets talk.

quite busy are we?

hey DOC i got another engine laying around at my house I will PM you.

I just need to get my emanage wiring straightened out and my car will be back on the road running 8 psi, I blew my engine running 12psi but that was with a bad tune and potential wiring problems hehe 8 psi should be pretty safe. Corolla's with boost feel like little super cars.

any updates and dj reads 10% higher than md,right?.

I've got some pics on the way

There's no way to say for sure how one dyno reads to another since so many factors are involved. What we do know for sure is that it made x amount of power before, and now it's making x amount of power after, on the SAME dyno. That's really the only accurate way to compare numbers.

-Doc

WAY WAY WAY WAY OVERDUE update This whole kit was completed like a month or two ago, I've just been so busy that I just now had a chance to post these up. I've got some more as well that I'll put up as soon as I can.

that is just a work of art that plumbing and CAI, doesn't MAF have problems when venting boost (blow off) to atmosphere? or you got yourself covered with a map? just askin'

Very good question.

If you look in the 3rd-to-last pic, you can see a small diameter aluminum pipe... that routes the air from the bypass valve back into the intake stream after the MAF... no problems

-Doc

those new HKS SSQVs are pretty spiffy

Man Doc that looks really nice., maybe once i get back i might have to bring my car by so maybe i can finish her off......