Just wanting some input from people. I have a chance to buy a brande new Precision 5431 .63 A/R journal bearing or a Turbonetics 60-1 ceramic ball bearing. This is goin on a B16A with a built block and GS-R cams. Shooting for close to 400 WHP with as little lag as possible, which turbo will be more streetable? I cant find much on the turbonetics turbo. Any info would be great

 

budget? 60-1 is pretty big.. almost too big. Get the smaller of the two if must choose only between those two

 

Well the turbonetics is out, way to big. I like the precision 5431. I dont wanna spend much more then about $700. The precision is $619 shipped. So ill prolly end up with that. Unless you think theres a better one for about the same price

 

I just got my 5431 in the mail this week.. For a 400whp goal in sure thats more than enough turbo for the job..

 

Well 400 is just a goal, the motor can take more. Whats the most you think I can run outta it in pump gas? I dont have E85 where I live either, so 91 OCT is all I can get. Ill be running precision 1000cc injectors with it

 

there are 2 precision 5431's

one is the older design with the 8 bladed v trim compressor wheel and often comes in a B case. this turbo isn't as efficient as the new one and surges if pushed

the new one is the bad *** one. 6 bladed 50 trim, bright billet aluminum compressor, usually comes in an E case but can be ordered in B as well

 

stick wit precision turbo.. I luv my sc61 n my 6262... Precision turbo all the way..

 

I assume you are talking about the billett 5431? Either way if 400 whp is your goal, you should probably have something a bit larger than that.....how about a 3431 or 6031? both bigger and will make 400 whp a lot easier, same price as the 5431 as well....

 

With the new 5431b like i have im sure he would have no problem at all making 400.. And have great spool response as well.. If 400 is only his goal why go with sumthing thats goin to be slow spooling..

 

A 5431 is going to have to work pretty damn hard to make 400 whp, especially if its 5431 cast, not the billett. Judging by the price he quoted at the top, $619, that is the price for a cast 5431, not billett. A 3431 will get to 400 whp a lot easier and at lower boost pressure.

He has B16 with gsr cams, reving to 8500 rpm is no problem. He will see full boost by 5000 rpm, leaving lots of room for a great power band.

 

Yea this is true.. U can get the 5431b shiped from speedfactory for 675.. I see full boost at 4000 but that is on a lsv with type r cams.. Im sure with a b16 and gsr cams it may be some what slower.. Either choice would be a great choice in my opioion one may require alittle more boost than the other but better spool respose.

 

I actually just tuned a pretty typical street car build the other day with a billet 5431 .63a/r.

Setup:
81.5mm GSR
B16 Head
9.0:1 CP pistons, Eagle rods
GSR cams
Blox IM, 68mm TB
Ramhorn, PTE CEA 5431 .63 a/r
PTE 600hp IC, 2.5" charge piping
PTE 880cc injectors, SF 4bar, 255HP Walbro pump
3" DP and exhaust

Results:
442whp/308tq @ 19psi - (injectors at 86% duty cycle)

The turbo is a nice match for a quick street car. The car is very responsive and fun to drive around town. Spool wise, it built 7psi by 4500rpm, 15psi by 5300rpm. I'll try to put the dyno chart up here for you guys tomorrow.

 

Its been awhile. But I put everything on last week. Runs good ( stock P2T ECU and OEM injectors right now ) doesnt see over 3K RPMS though as im babying it around town. I have Precision 1000cc injectors and a Chipped P28 with and OBDII-OBDI conversion harness running hondata. Ill let you know of the results when I take leave and get it tuned. Did end up goin with the precision 5431

 

5431 cast or billet?

this goes without saying, but stay out of boost untill its tuned, or by by motor.......

 

Took it to the dyno, saw 344WHP on 16 PSI, but after it was all said and done, settled on 14PSI and the car is app 330WHP 230TQ. Reached peak TQ at around 5K and the TQ line stays straight till redline. HOWEVER, I was drivin home 3 days later, crusin on the freeway at half throttle, 85 MPH at about 5K in 5th ( itr tranny ) and all the sudden power was lost and the throttle hardly responded and made a god awful clicking noise. Sounds just like a kid who taped a card in between the spokes of his bike. When I crank it over and push the throttle all the way down in struggles to hold 300 rpms, other times itll have perfect throttle response and rev up but the "clicking" is very noticable. Any idea? Im thinkin its a bent valve, just wondering if anyone else has had this happen? Timing is dead on, thats the first thing I checked.

 

Turbonetics burned me hard (with the ceramic junk), several times in the past. They can go to hell as far as I am concerned

Long story short I dropped about $8500 with them back in the day. Turbos kept going bad (3). One let go and scuffed the cylinder walls. In warranty but they wouldn't cover them. Completely their kit. Cost me thousands on the rebuild and essentially threw out the rest of the parts (turbo included) except the piping and intercooler. Overall it was a $14,000 mistake to choose turbonetics.

Get the precision.

 

careful. your beloved Precisions used to use Turbonetics turbine wheels, as well as the same content of their ball-bearings that are used now.
And what did you wind up getting in the end? A Garrett, right? Why not recommend that to him?

 

Yeah... I had a lapse of self control there. You guys like the precision and he said journal bearings. I try to suppress those feelings but its been a long day and I saw the word turbonetics lol.

If it were me I would get a Garrett GT .

 

... no one has had an unpleseant experiance like I posted above?? Damn, alright. guess a new head is in order. Gonna run a full supertech set up then back to the dyno. Let you know of more results when it gets done

 

Not that's turbo related, no. that's bad assembly and valving of parts.. installer error.

Use the DR series valvetrain in case you change camshafts.

 

Pulled the head off. The valve snapped in half and had a nice play day in the number four cylinder. Head is destroyed and so are the pistions. Cylinder walls survived though. I bought another head, this one has a full supertech valvetrain, port and polish job as well. I should have my new CP 81.5MM 9.0 to 1 pistions tomorrow with Eagle rods. Gonna use my original B16A2 motor for yet another build. Hopein for better luck in round two!

 

Dang dude! Thats no good. Never had one fall apart like that but I have had a few holes in blocks from time to time. Any signs of overheating? Obviously that cylinder is pretty chewed up but I would think there would be something obvious as to why it failed. If it came apart during cruising it must have had some damage from something.

 

No signs of overheating, wasnt even a hot day at all, just cruisin along on the freeway and she gave away. Only thing I can think of is I was cruisin about 85 MPH and my ITR tranny sits at like 5200 RPMs at that speed, just a tired valve i guess.

 

THat was going to go whether it was 5200,1000, or 9000 rpms. Ouch.. Best of luck while getting it back together.

 

The bad and the new. Heres what happened. pulled the motor sat and tore down the block yesterday, Block and bottom end are all in good shape minus the pistons. Those are the new pistons