Turbo selection gt4294r or gt4202r goal 650-700rwhp
 

It´s time to change my turbo.

Which turbo is better choice gt4294r,gt4202r or something else? Goal 650-700hp

My current set up:

13b full bridge ported engine scr apex selas (two piece)

turbonetics T66 TURBO, 60SE-BB-H66-65-TUND0_81
60 series compressor cover with a HP66 (66mm) compressor wheel. F1-65 turbine wheel in a tangential undivided .81 A/R housing. Ball bearing

Injectors 850/1680cc fuel pump boch044 stock lines.Re wired.(if i upgrade turbo i need 2000cc injectors and other boch044 pump?)
Big inter cooler
4"down pipe 3.5" exhaust
devil own water injection 800cc injector start 12psi (0.8Bar)
BMC dual air filter
ngr r 10.5 plugs
hks twin power

Apexi power fc tuned 20psi(1.4bar) ar 11.2-11.7 timing 8 split 8
Fuel octane 98 premix 1:100

Stock intake manifold and throttle body.

Max hp 517

Either could reach your HP goal, it just depends how much boost you wish to run and how important response is to you versus that given boost needed. A good compromise between the two would be a GTX4294, it essentially has the ability to flow the same as the older cast 4202 but keep the response of the 4294.

~S~

Sean, what's ur price on the gtx4294? And how does it compare to spool and power of the S400-sx 67mm Borg.

I highly recommend a Borg Warner turbo...s400-xs would do the job

Islander PM sent,

BW units are good solid units as well, I haven't had a chance to do a side by side against a comparable GTX. You can also get smaller inducer GTX's as well but they are special order.

~S~

How abaut this turbo, is this too big for 650-700ps abaut 25psi

Borg Warner S400SX3 Turbocharger With Attenuator "Race Cover" (74mm) - AGP Turbochargers, Inc. Store

i have the borg warner s400sx fmw, 67.7mm with the race cover t4 divided 1.10 housing.

brand new in box, only scuffs or whatever from test fitting. id like to sell it for $1100 USD.

PM me,

i think this is abaut same size than my turbonetics t66, maybe biger turbine 75mm?

Similar size but his flows 94lb per min. Yours might low high 70's to low 80's.

Roan from rxpart.com makes 741whp on e85 & 805whp on e98 w/ an s475...I think 30psi

What guy´s think this turbo?
BorgWarner AirWerks S400SX3 (179176)
Kompressor: 76,00mm/ 104,90mm
Turbine: 87,37mm / 81,74mm / 1,10ar
Goal +600whp and 200 mph standing mile with 98e5 fuel

http://www.ebay.de/itm/BorgWarner-Ai...item19e0bba556

Here is what I would use if you want to stick with BW;

BorgWarner S400SX 67mm FMW

Thanks, where i can find compressor maps?

Its in there...

Sorry my mistake.

Look it´s flow abaut 75-80lbs/m maybe it is too a small amount of my goal 650-700 whp. i think i need abaut 90lbs/m.
My old turbonetics t66 flow 65-70lbs/m and did 530whp.

Your previous post said 600rwhp plus, which this turbo will easily do. Keep in mind you were previously limited by you turbine wheel, so comparing compressors is only half of it.

the BW S400 FMW looks like a good recommendation given your objectives.

86 pounds per minute will more than do the job.

http://img513.imageshack.us/img513/2712/hokp.jpg

the price and build quality are right.

howard

GTX4294 will be a bit more efficient on the compressor and response has the potential to be a bit better depending on the setup, GTX4202 is a very efficient compressor at the flow you are considering. The BW is a solid performer with that turbine though and I would say if you do buy the BW at least give the sale to Elliot over someone on ebay.


~S~

If i read map correct it make 86 pounds per minute under 0.65 efficient and very hi pressure ratio?
I know, pressure ratio is not boost pressure.
I think this 86 pounds per minute is absolute maximum for this 67mm compressor?
Sorry, i write very bad english.

Yes 600+ is under 700 :blush:

yes i know at turbine wheel limit flow and need to think aggregate, turbo and 13b engine flow etc.

Do you know which one turbine is better for 700whp and hi engine rpm abaut 9000rpm:
Turbine: 87,37mm / 81,74mm / 1,10ar or 83,47mm /74,29mm/ 1.10ar

i probably choose between these turbo´s

S400 74mm (179174) 83mm turbine 1.10 a/r
BorgWarner AirWerks S400SX3 Turbo 179174 original Turbolader Borg Warner S400 | eBay

S400 76m (179176) 87mm turbine 1.10 a/r
BorgWarner AirWerks S400SX3 Turbo 179176 original Turbolader Borg Warner S400 | eBay

I'm not telling you which turbo to pick but here is what I am using.

I have a full bridgeport 13B-REW with Cosmo upper and lower intake manifolds. I'm running an HPI (High Power Improvement) T4 exhaust manifold and a Borg Warner 475 with a 1.10 AR and 83mm exhaust wheel. It was the standard 75mm with no race cover. running a 4 inch exhaust from the turbo all the way back.

This set up made 703 RWHP at 23psi on E85 only (no race gas, no water injection) on Steve Kans dual eddy current mustang dyno. When we took it to a dynojet to see what it would make there since the majority of people on this forum post dynojet numbers it put down 810 RWHP at 23psi. We didn't change anything, just made a few runs.

I personally like the "low" readings better of a mustang dyno since it is in my opinion more accurate.

Here is a dyno graph of the set up. It revs up to 10,500 RPM's. Its all done on stock bearings, 2mm Rotary aviation black supper seals, atkins solid corner seals. No stud kit, no extra dowl pins. 6000 miles on this set up with zero issues getting beat on daily. Oh I run 1 ounce of Benol castor oil premix per 1 gallon of E85.

Hi.
Wow.nice numbers.
What engine managment and ignition you use?

For ECU I'm running Motec M84

For ignition I'm running an M&W Pro 14R and I'm using Honda CBR coils. They are coil on plug. Spark plugs are 11.5 NGK race plugs.

Are your Rotors clearenced and is the rotating assembly balanced?

Rotors are NOT clearanced but the rotating assembly is balanced.