only reason i ask, is that, i have seen T34, T38's with lots more BHP than mine, but only slightly more or about the same tourqe as mine? on a T3

 

T34 as it will spool up quicker but the power will tail off over 6K as the T34 runs out of puff.

T4 lower torque due to longer spool up (i.e. lag) but will be having a holiday at the top all the way to 7.5K, laggy but may be safer for a 4wd drive car as the gearbox will have an easier time...! (Probably struggle to stop it exceeding 400bhp to be honest!)

 

t34 would be best for you mate, as long as your not gonna want more than 400 hp in the future. my old stage 3 saph was running an xs power to4e similar to t35 and the punch when it came in about 3500 rpm pined me in the seat hard. pined me harder than my current t4 setup
but it didnt make nowhere near as much top end bhp. from my experience torque pins you in your seat and bhp makes high speeds.

 

Dannn Just out of interest, Is there not an inbetween turbo?

 

GT30 FTW!!

 

allegely a T38 - but a lot of people don't think they work very well...

 

Thanks mate,

 

Rich

Bolt a T4 on it..... BADEWLLLLLLLLLLLLLLLL

 

i am not looking to change my turbo buddy, the way my car drives is spot on for how i drive, not really into 150+ mph down the motorway stuff.

it just got me woundering, when i see other peoples cars with more power and less talk

 

Jake, wtf does BADEWLLLLLLLLLLLLLLLLLL mean?

 

My T34.63 did 406bhp and 428 lb ft torque on live mapped greys,peaking at 35 psi,holding 28psi

Turbo only lived for 6 months on that boost though

 

That is how you spell the sound of a T4 chattering as you change gear or back off

 

T4 will give more torque than the other turbos you have mentioned if used on the right set up and mapped correctly. More air+more fuel + less backpressure = more torque and power, it is as simple as that

 

i see mate. its a trade of as far as ive experienced more bhp but less torque. ive had a t3, t34 and t4 and as a road car t3s are wicked so punchy and easy to drive.

 

He said 400Bhp not 500bhp and even then there won't be much in it unless you do a Rod Tarry and you spike 40psi (ref old 500bhp engine) in the mid range and and then claim you have more torque than a torquey thing!lol

 

 

If torque is the be all and end all lets bin the YB and go Diesel power.

Tbh i couldnt care less what power my car makes. I built it to the spec i wanted and it goes well enough and puts a smile on my face[when it does run that it ] It could make 330bhp or 430bhp i am not bothered.

Anyway isnt the reason T34 cars have lots or torque from having a big boost spike in the mid range?

 

get a t2

 

i dont know how its happened but scooby slayers comments where actualy mine

 

Top end power is much easier to get than a wide power band that has alot of torque.

 

You really need to be asking what is best for your needs and driving style.
I run a T34/T3 with a few mods, I have full boost 2 bar by 2300rpm, you are looking nearer 4500rpm for a T4, which will produce more torque higher up, but a hell of a lot less lower down.
If you want to make it really drive able get the inlet ports done around the valve area, man it brings it alive, oh and mine does not even think about getting breathless at the top end due to this, pulling all the way to the rev limit so fast and smoothly I now need to watch the rev counter, the torque difference is amazing.
Torque was one of the things a turbo lump was good at, but spoilt to a degree with T4, as really too big for the power most run, better to sacrifice 10bhp top end to gain 50+ lb ft lower down I say.
A halfway house between turbo sizes would be a cut back T4.
A more modern ecu will give more torque if it has AL properties a lot have like emerald, this is NOT the popping banging sort but in gear AL.
I went for a turbo that will supply enough puff but tried to keep as small as possible, I love it pulls down to 850rpm top gear and pulls with no snatch, in town driving you don't need to go over 1500 rpm, just trundle about all day.
As said a diesel will slaughter the petrol for torque, but lose top end, so it's your choice, steer clear of cheapo turbos made of chocolate though!!
tabetha

 

just about the cheap turbos. i put one on my last saph and ran it at spiking 26 psi and holding 22 psi for 4000 miles and it was still perfect when i sold it. and it was used hard aswell.

 

As Tabetha has hinted at, you need to specify WHERE you want the torque, as the different size turbos will all provide similar torque figures (+/- 40lb ft), but just at different rpm points. A T4 will give peak torque at 5000rpm, a T34 0.48 at 3500, a 0.63 @ 4000. The T38 doesn't give good torque figures though.