Precision Billet Turbos

[PJ.]

Yes it was either going to be really good or really bad!

Dave, it was actually the EGT warning light set too low, the light at the end was the oil pressure though.

Simon, the first pass was on 49psi from memory and the second was on 58psi.

Brad, I think I bogged one run last time out when we went fast, the last year had seen a lot of mucking around to find the balance between bog and wheelsping. We had absolutely no testing with this turbo (which is an 8285 with a 1.12a/r) so it's an absolute monster of a turbo for a 2L. Reality is there is enough turbo there to touch into the 6's in a chassis car.

I believe it could have been good for 170mph on a clean pass, remembering that the car is 2700lb with me. So far from what we've seen looks like it stretched a rod bolt, they are rated to 250hp a rod and I would confidently say that it was making 1000hp atw.

It ran a 1.6 on the first pass and a 1.5 on the grenade. Best 60ft has been 1.28 on radials and 1.32 on slicks.

[SCR48]

Could imagine what what was going through your mind when things got loose. Holy shit.... Great steering job to get it back in shape

[SCR48]

Doesnt need more boost, at 25psi that thing should be at least 500rwkw.

Id say the tune is pretty conservative or something is a miss.

No traction is an issue. Ill be back in the new year for some cooling mods and wil hopefully have some better rubber on by then.

Having to tune this is 5th gear would take away a bit of the power figure. My tuner reckons with the gear ratio in 5th the reading is about 50-60hp lower than what its peak power is.

But in saying that I'm happy with where its at for the moment and gives me a good chance to get used to the car. After having the car off the road for 3 months, going from a 25 to a 30 & adding 140hp its still feeling super quick. For now at least

[ido09s]

PJ - A 1.28 on radials, holy friggin hell!!!! I can only wish i could get my 60's down to that!!!! I would be happy with a 1.60 lol

SCR48 - I would be very surprised if 5th gear made that much difference to a power figure. Torque will be affected more than hp. I guess time will tell though

[Lithium]

I believe it could have been good for 170mph on a clean pass, remembering that the car is 2700lb with me. So far from what we've seen looks like it stretched a rod bolt, they are rated to 250hp a rod and I would confidently say that it was making 1000hp atw.

It ran a 1.6 on the first pass and a 1.5 on the grenade. Best 60ft has been 1.28 on radials and 1.32 on slicks.

You have well and truly proven you can set up and steer this thing, amazing stuff

Something which still boggles my mind is the times some of these guys in the states are doing with EVOs/DSMs with small/medium size turbos - there are a number of guys trapping between 160-170mph on 64mm and 67mm turbos in what must be similar weight cars. I'm not sure wth to make of it, do you have any theories (or wisdom) on how they are pulling that off when you are using a 82mm turbo to get to similar traps?

I know it could seem like I am being facetious, but I am totally not - it's a thing I've been genuinely trying to get my head around, I consider anything that runs over 140mph as completely mind bendingly fast and the step up to run 160+mph I still struggle to comprehend being able to achieve with something which still looks like a car and without a turbo which is under 76mm.

[ido09s]

Lithium, methanol maybe? massive weight savings? Are they running in classes with rules or just street meet type situations

Our 200SX is 3000lbs on the Sydney Dragway weigh bridge and last time out consistantly trapped at 135/137mph. Thats a complete car on E-Flex, no weight saving at all. Drive it to the track and bolt on the ET Streets and go racing. The only reason the sub will come out of it next time is because it tore itself loose on my last pass and i have no real way of securing it properly now lol

Years ago a 13 second car was damn fast, nowadays unless the car is something weird it needs to run 10's to be noticed. The joys of modern technology

[Lithium]

Lithium, methanol maybe? massive weight savings? Are they running in classes with rules or just street meet type situations

Our 200SX is 3000lbs on the Sydney Dragway weigh bridge and last time out consistantly trapped at 135/137mph. Thats a complete car on E-Flex, no weight saving at all. Drive it to the track and bolt on the ET Streets and go racing. The only reason the sub will come out of it next time is because it tore itself loose on my last pass and i have no real way of securing it properly now lol

Years ago a 13 second car was damn fast, nowadays unless the car is something weird it needs to run 10's to be noticed. The joys of modern technology

None of them are on methanol, or using nitrous oxide - though I'd assume the ethanol blends are more like 98%

Here's a late model EVO doing 8s at >160mph on a PT6466 on E85 weighing 2700lbs (really light for an EVO 9, but comparable with PJ's car) - for interests sake in the off season this car is undergoing a bunch of weight reduction and upgraded to a FP Super99 HTZ. Fairly good chance this thing is going to be one to watch next season!

http://forums.evolutionm.net/drag-racing/667853-8-77-163-junk-box-evo-boostin-performance.html

Yes, it's incredible how far things have come - really really cool times we live in! I was ecstatic when I did 12s with an R33 GTS25t back around 2006/2007... so much for that lol.

[ido09s]

We set out wanting to run 12's with the 200 and it went 13.0@107mph with a standard turbo, it was close enough, so much for that target. We then moved the goal post a bit a few times due to the target being easier than we thought.

8 years down the track it makes a bucket load of power and i cant drive it

Its run 11.006@137mph with the old T78 on it which is reasonable but when you consider its run 137mph i have some work to do. Will see how the 6766 goes next time out

[Lithium]

Awesome - what is the T78 power delivery compared to the PT6766? Actually discussed the two turbos with someone recently.... they had a T78-33D, then went to a T51R-Kai, and are still not content with how much lag they have for the power they are making (on a stock stroke RB26) and looking for a suitable way forward.

[SimonR32]

Awesome - what is the T78 power delivery compared to the PT6766? Actually discussed the two turbos with someone recently.... they had a T78-33D, then went to a T51R-Kai, and are still not content with how much lag they have for the power they are making (on a stock stroke RB26) and looking for a suitable way forward.

How much power are they making and how much power do they want? E85 also?

[Lithium]

550-600kw at hubs, C16<br /><br />Sent from my GT-I9505 using Tapatalk<br /><br />

[PJ.]

You have well and truly proven you can set up and steer this thing, amazing stuff

Something which still boggles my mind is the times some of these guys in the states are doing with EVOs/DSMs with small/medium size turbos - there are a number of guys trapping between 160-170mph on 64mm and 67mm turbos in what must be similar weight cars. I'm not sure wth to make of it, do you have any theories (or wisdom) on how they are pulling that off when you are using a 82mm turbo to get to similar traps?

I know it could seem like I am being facetious, but I am totally not - it's a thing I've been genuinely trying to get my head around, I consider anything that runs over 140mph as completely mind bendingly fast and the step up to run 160+mph I still struggle to comprehend being able to achieve with something which still looks like a car and without a turbo which is under 76mm.

Don't worry I have the exact same convo's with one of the most well known tuners in the US responsible for half of them. It's amazing on their behalf, I have trapped 164mph with the 71, I would have expected to see 170mph on 58psi if the thing would have held together on the 82...

They are onto something, full credit to them.

[SimonR32]

550-600kw at hubs, C16

6466? Should do same if not more power and shit on a T51R for response

[Lithium]

Yeah that has been discussed, we aren't short on ideas - it was just going to be particularly helpful if there was a comparison between a turbo that has been on the car before... and one of the options that could be considered. One of the points of consideration is if the PT 64/67mm would make that kind of power at the lower boost levels (comfortably under 30psi) that a highly cammed/ported RB would like to.

[ido09s]

To be honest we couldnt really find much to compare it to on the dyno results and i havent really driven it a lot to get an idea of just how much better it is. Its only because its ridiculously fast and to drive it in anger on the streets is asking for a jail sentence!!!!! You know your onto something though when the speedo turns as quickly as the tacho would in third gear lol

But to give you an idea. The car runs a stock cranked RB26. We have limited it rpm wise to about 8800. We have spun it to 9500 in the past and although the good old RB sounds awesome at 9500, i just dont like doing it with a stock crank. Its got a fairly well ported head, squish zones removed on both sides with some GReddy 264/272 cams. Small lift with 9.7mm, standard valves and a 1.mm head gasket. Its nothing special to be honest, though i am sure others may think differently. The day i find a cheap GT block is the day it will get serious, though i reckon i have more chance of finding a unicorn lol

Response seems to be pretty much the same. On 25psi we used to make 430rwkw with the T78 and now its making 485rwkw. Thats on the Unigroup dyno. This is on Caltex E-Flex. We are going to push it further, i just need to put some head studs in it and get a new boost controller. Currently it has standard head studs in it and the good old Profec B only has a 2 bar map sensor in it. I am confident that on 30/32psi we should see close 550rwkw

With the T78 on it the car went 11.006 and a best mph of 137. The car weighs 1420kgs with me in it. I am very curious to see how it goes mph wise with the 6766 on it. I just hope it doesnt go 140+ too quickly as we dont want to have to put a chute on it before i run a decent et

I will try and get the dyno graph up some time tonight for you so you can have a look at it but from what i have seen so far i would go a 6766 over a Kai. They are an old laggy piece of shit in comparison. We tuned one when i worked at Advan and i was pretty shocked at how laggy it was

Edited December 23, 2013 by ido09s

[Lithium]

What T78 was it? Surprised there isn't a difference in spool!

PS. There is apparently also Gen2 CEA versions of the 62mm and 64mm compressors coming too. This outta be interesting!

[ido09s]

its a 33D 17cm.

I must admit, the car gets driven very rarely, i am talking about 500klms a year, so its a little difficult to comment on the response, but it doesnt seem to be all that different

The drag strip will be the main test. If it goes faster i am happy, if it doesnt, there will be hell to play with lol

[GTScotT]

Poor SR poor wallet.

[silvianc]

hello guys, now to the forum and excited to be almost done with my rb26 build going into a s14 240sx. like most of you guys still debating between precision DBB 6262, 6266(only two option im looking for, nothing else) for my twin scroll setup. im aiming 550-600 whp on 93 octane and water meth kit. here in the states is kinda hard to find e85 in the country wich forced me to choose methanol injection or just pure 93 octane. looking for a decent response no more lag than 15-20 psi @4k. psi goal is around 25-28 with metanol inj? .chime in guys and tell me what you think. note: decided to post my setup after reading 106 pages of information, kinda overwelmed with all the information and my head is just spinning around lol. thanks for the help

JE 8:3:1

eagle rods

ARP main studs

crank polished, collared, N1 pump, 9.8 qt oil sump, acl bearings

greddy 1.2mm HG

Arp head studs

supertech bronze valve guides, springs and retainers. 3 angle valve job

Tomei type B poncams

stock IM, ID 1000's

using haltech plug in, 3.5 bar rmap

raw brokerage twin scroll manifold with twin 38mm tial mv-s, 3" downpipe(made for 6262,6266)

need advise on fuel setup, have a twin entry fuel rail and currently a single walbro 255 in tank that was using on my sr20det swap.

Edited December 28, 2013 by silvianc

[Hattori Hanzo 69]

6262 will easily achieve your power goal