I originally bought this turbo thinking i was going to do a fully built sleeved b20z block and built gsr head.funds ran low. super low. I couldn't do it anymore so i slapped everything together just to see what it could do. Runs peeeeeeeeeeeeerfect. except for the fact that it hits full boost at around 6k. And when it hits, its roasting tires and i gotta death grip the steering wheel.With my stock block b20z im kinda hesitant to take it any higher than 8k rpm's so is there anyway possible with more tuning can i somehow make this turbo spool sooner? lets say instead of 6k maybe 5k? i thought being 2.0liters would help spool the turbo faster but i guess wrong.

B18B1 head
blox intake manifold
str 67mm tb
crower 403's degreed
springs & retainers
skank2 gears

stock block b20z

precision pt6765

in a few months i wont be using this LS head, going to swap it out for a semi built gsr head.I know the turbo is big but what else really can i do to make it spool faster? NO, i dont wanna get a smaller turbo unless i get a good deal so thats outta the question. any help?

 

Nothing really. You're using a big turbo on a small engine (yes sub 3.0 litre is small), on something that creates over 80lbs of air per min. So, with your setup the exhaust energy your engine creates for this turbo is only going to be really efficient in the 5k-8k range anyway. Using nitrous with it on the street will just make the driving characteristics worse,. So... Enjoy it for what it is.

Big turbo.. for big power.. what were you expecting?

 

Correct me as I may be wrong, but running less IGN timing as the turbo spools will achieve a faster spool. This is not going to make this turbo spool like the 50 trim this motor needs but it should help.

 

What manifold and what size downpipe are you using?

 

just a basic ramhorn and an open 3in down pipe that cuts off right behind the oil pan.Someone had told me in my case that maybe a lil back pressure would help with spool.So should i get like a 3in resonated test pipe and another 3in resonator all the way back?

 

i think i remember something saying something about timing but instead of less to run more? but wouldnt i be more prone to knocking?

 

Get a smaller turbo. Or get a bigger engine.

/thread.

 

mmmmm. Not really.. not enough to help the OP, anyway. But you also lose acceleration from the retarded timing.

 

Yea I wasn't sure how that worked..... Never had the chance to test it out.

 

You're thinking of AGGRESSIVE timing retard to create a 2 step effect in order to get the turbo to "spool up" at stop lights and tracks. But it can't be used as a progressive way to have the turbo work faster while driving. Doing it either way too often would cause the manifold to go through a lot of heat and hurts the manifold and turbo over time.

 

No not aggressive 2 step style. Something I read, but it was on the Interwebz

 

I would think that any safe amount of ignition timing that could be added before the turbo begins to build boost (and taken away after pressure is seen) would increase the spool time a little bit, not 1K rpms sooner. It's all irrelevant really, until you're able to examine the results on the dyno. Wouldn't a good tuner know to do this as to make your car less a turd before boost?

 

I know what you mean, and yes, a bit of increased timing could possibly help, but not to the extent that OP wants to move an 80lbs/min+ turbo on a small sub 3.0 Litre for street use. The turbo is just too big to be responsive.

 

I would get some aftermarket rods and a custom set of flat top pistons 10.5:1 comp or higher. also you can get a turbine blanket for the turbo it will help it spool sooner.

 

the least amount of exhaust will result in the fastest spool.

the least amount of timing you can bear will create the fastest spool

the more fuel you can dump into the motor can sometimes result in faster spool

compression does not have nearly the effect on spool some would make you believe, but it does make out of boost perf somewhat better.

I have a PT6776 on my car.. I run active antilag on the street to use it, but my car is making 650+whp running on 10.5x28 slicks RWD.... You really need that type of power in a honda on the street?

 

just sell the 6765 and buy something smaller man. maybe a surfer from theshodan

 

I have a feeling you have no idea what you are talking about. And I call BS on your 650hp RWD claims.

 

Am i reading this correctly?

 

^^^ you mean are you reading ALL OF IT right...

 

Yeah?

I suppose I meant to say exhaust PIPE and whatnot.. A 4inch dia dump out the bottom of the car is going to be the fastest spooling exhaust possible.

The rest is accurate...

And my 650whp PT6776 car is not a honda, its a domestic pushrod thing.

 

Oh i see.

 

anybody wanna trade me for a smaller turbo? i think a precision sc34 or a turbonetics 60-1 would be better for my setup. what do you guys think?

 

a 6262 would work well or a gt3076r, 57 trim, depends what your power goals are and what kind of characteristics u want it to have. gt28, 50 trim will be wicked fast spool.