Faster Is Faster

Simply question: (and simply answer)

What is the differents between to4b and to4e? and how much hp can they produce? which one you recommend? (hope to get +500hp)

Ryde _Or_Die

Neither for 500+HP. Their are minor differences, I believe the T04E is slightly smaller and a newer design. For 500HP you need a T88 or something close to it and a strong engine(port job will help alot).

hondah8er

You do not need a T88 for 500 hp! a 60-1 you can get 500 hp if you turn up the boost to around 20 psi and have a well tuned motor. A t66 will also easily make 500 hp.

eViLRotor

iTrader: (2)

T04B 60-1 is a 2.34" inducer and 3.00" exducer wheel, a T04E 60 trim (the largest T04E) is a 2.29" inducer and 2.950" exducer.

The 60-1 flows more: 65lb/min compared to 50 lb/min for T04E 60

82streetracer

iTrader: (1)

inducer? exducer???

what does that mean.

CrackHeadMel

iTrader: (2)

air inlet, and exhaust outlet i belive

Ryde _Or_Die

Ok, maybe you don't HAVE to have a T88 or the like, but it will make it much easier. A 60-1 is not known to be easy to get to 500RWHP(nor have a seen or heard of anyone doing it). A T66 is more in comparison to a T78 which is fairly close to a T88.

82streetracer

iTrader: (1)

the 60-1 has a 4 in inducer then

the 60-1 hi-fi has a 2.34 inducer. it flows just slightly less than a normal 60-1.

Faster Is Faster

okay I am quite a new with this hobby and dont know a lot of turbos. Question: If I have street ported engine and fuel system is adequate and I want 500hp, how I choose what turbo should I get. Let say that at the moment I have 300hp (street port and new turbo coming up next winter), how my hp figure will differ if I get To4B or T66?

MrBob 86

http://64.225.76.178/catalog/comp_wheels.html

HWO

Who said he was talking RWHP???

a 60-1 compressor wheel will certainly flow over 500 flywheel HP as someone else already said, Why do some people always think someone is talking RWHP? RWHP is never accurate, it depends on the dyno type that it is being recorded on, true HP is engine HP

HWO

INCORRECT

the Inducer and the Compressor housing Inlet diameter are 2 complete different things

the inducer is the diameter of the compressor wheel across the leading edge of the wheel.

You are qouting intake throat sizes from the compressor housing

Ryde _Or_Die

I've never talked to anyone except ricers that didn't use WHP. And if RWHP is never accurate, whose going to be faster in a 500flywheel HP FD or a 500RWHP FD.

Seems to me most people use flywheel horsepower simply to impress people since they have a larger number.

Anyways, where can you get engine HP measured?

West TX RX-7

I think he was talking reliably. 20lbs on a 60-1 would be pushing it to get 500 rwhp, a 66 could do it at 20. But a T-76 would do it at reasonable boost levels and be reliable at it. ie 14-15psi.

Black7Conv

Hello there!
I wonder if someone can help me to find out more about a TO4B Garrett turbo unit. The code name is TO4B34 and the serial number is 465070-3. I intend to push it at 1 bar boost. Is this turbo enough up to 350+ hp?

Thanks
George

eViLRotor

iTrader: (2)

I kind of agree with HWO in this one. Most manufacturers rate automotive equipment or flow rates etc. at bhp

And yes, rwhp is inaccurate as a comparison, because every dyno is different. Mustang, Dynapack, Dynojet will all give different readings with the same car.

If I want to brag I can say, I've got 342 rwhp(DynoJet). But I've also made 308 rwhp on a Mustang Dyno. That is the number is generally use, because most dynos in my area are Mustangs.

Ryde _Or_Die

I understand they can be different, but engine HP doesn't tell you anything really. What if you have some driveline problems and you are losing 25% or some terrible amount of HP before it gets to the wheels. What if your car just has a big loss of HP through the driveline. Its just engine horsepower isn't what is used. You can't use it if it doesn't make it to the ground.

eViLRotor

iTrader: (2)

Yes, but when spec'ing turbo flow rates, and horsepower capability of that turbo, then driveline should not be involved at all, right?

Its just about how much hp the turbo and engine combination is capable of, that is what you are trying to determine.

remember, RWHP is really only how much power you are putting down on a set of rollers, which could roll harder or easier depending on dyno...

Ryde _Or_Die

Sure, you can use engine HP to compare turbo/engine setups. But don't let this guy be confused to this that 500 flywheel HP is going to get him into the mid 10s like hes proabably thinking after he searched. I think most people go by RWHP on here because they like to talk about USEABLE HP. If it doesn't make it to the ground it might as well be imaginary IMO.

Enough argument for me. I like RWHP because thats what gets me down the strip. Other people like flywheel HP because thats what the engine produces.

jspec shichi

people believe you know hey theres not much differance between a t77 and t88 turbo rar rar rar... you have to understand that there maybe be slight differances in comp wheel size, intake and exhaust housing sizes etc but if you think about it you are running anywhere from 1 to 2 bar of boost (14.8 to 28.6 pounds per square inch) which is alot and these minor differances in sizes can allow a slightly and i mean SLIGHTLY amount of air more in over the smaller turbine yet this all equivalates to more power when you think about how much air and fuel actualy goes in on each stroke...

for 500hp atw youd be looking at alot of the hks range for good mid power figures

t04e
gt2510 (its getting close to 500hp and should still do)
gt3040
gt3540
3037 and 3037s v trim applications

and also few other turbos like the t66 and td06 units.

also remmeber that even the stock series 5 turbos can tollerate high power outputs... maybe try taking a basic s5 turbo, t04 front cover and compressor wheel with backcut exhaust housing and larger exhaust wheel with external 42mm gate and you should be able to flow around 400hp

- adz