I'm sure you're all bored to tears with my noobie questions but here's another.

With my set up, being a JDM Honda B18C Type-R with a Garrett GT2860RS turbo and log manifold. I'm wondering what kind of turbo lag I can expect. I'm not pushing the boost at all as I don't want to modify the engine internals so the state of tune is going to be very mild.

Since it's a 1700 lb car and the turbo having all ball bearings, oil and liquid cooled, I'm thinking it should spin up quick enough to move the car with little or no lag, assuming I'm in an appropriate gear.

I'm not sure how much HP I lost off idle before the turbo comes into play but it was fast before. It had something over 200 hp before but the exhaust is now restricted by the turbo before it spins up, so I'm guessing off Idle HP and torque will be less. It still has its 11.1 to 1 compression and I'm shooting for 300 hp.

So what do you folks think? It's a street car with no aspirations of turning it into a race car. I will drag race it a little, autocross it some, track day road racing when I can (Mid Ohio) and running the new "Wilmington Mile" with it but all in all it's not designed to be a max power temperamental race horse.

 

Well. I tried to address this with you on the turbocharger and housing that you were using several months before bringing the car down. You seemed to just bypass that discussion by going with whatever housing Greg was going to use on an external wastegate system, so its a bit late to try and minimize/discuss/ or change anything physically at this point.

regardless, its hard to say, since we don't know what A/R turbine housing you're using on there with that turbine wheel (this was why I suggested what I did.. ), and don't know what electronic boost control you plan to use.. if any.

The exhaust not restricted before the turbo's rotational inertia begins. If anything, it can acclerate the process.

I personally think that with the tyre you're running, and the course, you'll need proper boost control to change any characteristics you want of the turbocharger. You don't want this thing to come in at 1500rpms, or the driveline will just spin the tires, and you'll be upset with the amount of torque steer that you'll experience on any of these events...yes, even with an OEM JDM Tosen-LSD.

On the longer courses at Mid-Ohio, Mid-America and Beaver, you'll like that a bit more, even with your lower final drive. The shorter courses, however may present some problems, so your best bet right now is to literally "try it out". But you need to know what spring you have in the wastegate, turbine A/R size, boost controller you plan to use, etc.. before any true discussion can become of it.

 

98 spec?

(If yes)
Be very careful.

Let me know how it turns out, I am interested. Good luck.

 

Have the tuner ramp the boost upto 6k rpm

 

Hehe...

What really needs to happen here is EDUCATE yourself about YOUR car... you continuously prove to know nothing about it. Get the specifics. You may not have a clue what they mean, but for those of us who do, it makes a world of difference. So my answer is:

Yes.

Educated guess: That engine, turbo, manifold, ect... lag *should* be non-existant. Then again the tune and boost controller can change this.

 

Why would you put a gt28 and a log manifold on an ITR motor? Such a waste. Turbo will spool, make a bunch of mid range power/tq (exactly what you dont want on a stock motor) and then drop boost out the top.

Just throw a 57 trim with a ramhorn on it, make 320whp@10psi and be done with it.

 

Two words: space restriction.

Regardless, he won't listen. He is edumacated.

 

From one of your pictures it looks like the turbo's oil drain line goes forward, kind of makes a loop? Maybe that's the only way it will fit but it doesn't look ideal - the oil drain should be straight down and back to the oil pan if possible.

A turbo ITR engine in a 1700 pound car will be pretty wild, have fun. With high compression will you be using high octane fuel?

 

Never mind....

 

Poor guy... It's like you never seem to win, huh?

 

The oil drain does point down then moves around till it gets to the Moroso oil pan. I'm pretty sure the only important thing is that the oil plan is lower than the turbo drain line. Otherwise it could flow backward into the turbo.

Winning? I would have to care about what the peanut gallery has to say.

 

Uh on an External wastegated setup and if its a T3 GT2860RS I think it would be awesome. Maybe a bit on the small side. I'd probably do a 2871R but, anyway lol. On a road course it would be good.


Just got to remember there's a difference between "spool" and transient response.

 

Dude we put GT28RS turbos on our Quads .


I have just seen a few ITR/GSR's with Log manifolds and GT28/50trims on them and the power/powerband sucks, i mean i guess the midrange was good but it just sucked haha

 

Its only because you're seeing this from a drag racing perspective, and not looking at the bigger picture. It's like Peakboost thinking all over again with huge Kooks manifolds , low boost pressure on overly large turbochargers.. Hehe

 

57 trim and a Ramhorn was pretty nice on my GSR back in the day, Stock motor and all. Felt good, full boost by 3800iirc. Still carried the power out the top.

 

Myles. I never said it didn't , brother.. I'm saying that it was a top end power highway setup using that combination (and it was affordable too). But for this use, and purpose, either component just seems ... well, antiquated by design... But for a street-racing EG civic, yes, it was quite the combination back then.