Which Is Better To4z Hks Or T78 Trust Greddy

[Top_RPM]

hi all,

i just recently finished building my R33 GTR engine (cp pistons with tomei rods) running standards turbo. and iám cunfused wich turbos are better To4z Hks or t78 33d trust.

can anyone get me some Info about these turbo's and wich one is better 4 me if im thinkin of 400+ KW at the 4 wheels .....

[MSRB26]

I don't know about the T04Z but i know the T78 would get you to roughly the 450kw mark on a built engine, it's rated to 750 hp. I think it would just come down to personal preference provided they are rated to the same hp.

[wrxkilla]

T04Z all the way, newer technology...

will make the power easier than a t78

hell id go for T51R....

mick

[wrxkilla]

heep in mind spool times for t04z are very good.

mick

[Morgs]

Get the T04Z, you won't look back

[Roy]

heep in mind spool times for t04z are very good.

mick

<{POST_SNAPBACK}>

Has anyone actually seen a T04Z on an RB26 with std head?

[manage13]

Has anyone actually seen a T04Z on an RB26 with std head?

<{POST_SNAPBACK}>

Good question Roy! Here are some graphs from HKS. The turbo was fitted on a R32 GTR with 272 IN/EX cams.

But I would go the HKS T04Z over the Trust T78!

[Morgs]

I'll post up my curve when I scan it. Head isn't standard though.

[Roy]

1 bar at 4,200rpm???? Out of interest how often are ppl abel to match HKS claims of reponse and power...i have never really looked too much at the HKS website

I would have thought that std RB26s struggle to make 1bar at 4,200rpm...or is it a matter of whilst they may not be in full stride at 4,200rpm, they are actually makign that level of boost...they always seem to offer their best power over 4,500rpm when std?!?!?!

[Sydneykid]

hi all,

i just recently finished building my R33 GTR engine (cp pistons with tomei rods) running standards turbo. and iám cunfused wich turbos are better To4z Hks or t78 33d trust.

can anyone get me some Info about these turbo's and wich one is better 4 me if im thinkin of 400+ KW at the 4 wheels .....

<{POST_SNAPBACK}>

Personally I don't use plain bearing turbos, so the T78 wouldn't make it onto my list.

Does anyone have a compressor map for a T04Z?

I had heard (more than once) that the Garrett T04Z and the HKS T04Z are exactly the same.

If you are doing circuit work with that GTR I would be looking at a pair of 2530 Kai, similar power and better response.

cheers

[Top_RPM]

Thanks all 4 the info ... Thinking of the T04z

[discopotato03]

I remember searching somewhere in US sites for Garrett GT42R's and finding some mob that does custom housings for GT42R cartridges to recreate the HKS T51R's (KAI/SPL?) .

Now that some of these monsters (GT40R's and GT42R's) are available with ball bearing cartridges they no doubt will wind up on RB's , but with more conventional mounting flanges than the HKS T51R's with there specific V band mounts to suit their exclu er expensive manifolds .

For what big turbos cost I would not be without the ball bearinga either , the oil shear resistance on big shafts is considerable so bushes ? no way .

Again what Arnie said , cheers A .

[StageZilla]

so can anyone verify how similiar the hks t04z and garret t04z are?

[discopotato03]

Hi peoples , I did some sniffing around and it seems that Garretts GT40R and 42R are similar deal to HKS's T04R's and T51R's .

For the juicy pics search GT40R Pictures and look at the two image search pages .

Then drop down to the 9th site (FresnoRacing etc) for some pics comparing GT40R and T78 .

With a bit of searching there may be a twin entry T3 flange with suitable ARR housing to make it fit . These turbos are getting really big (huge) so maybe twins are not so bad after all . Note the 40R and 42R use threaded bore compressors rather than a nut .

Cheers A .

[williamsf1]

Morgs has a TO4Z and is a gearbox killer!!! it makes more torque earlier harder, and boosts faster than a 750hp gemballa 996 TT.... try beating that from a RB26 anything.....

[DLuded]

skylinesteve (i think thats his name) has 500+kw at the wheels with the t04z. just shows u how good it really is