Single (t51r) Vs Twins (t517z)

[GTR 94]

I think what people are trying to say is that: You sacrificed sooooo much response and usable power for so little power gains.

It just doesn't sound right. You mentioned you have a 1100hp set-up, so why is it only making 500hp?

I know an rb25 with a to4z making 360rwkw on pump fuel at 20spi

or

an rb30et with a 1000hp turbo making 420rwkw at 22psi, on pump fuel.

I do understand that these turbos really wake up at about 30+psi, especially when using C16, but your figures really sound low.

My question is; which set-up do you really prefer to drive?

*edit: Damn Daz just got in b4 me *

ok you are correct the power gains so far are minimal but, the car has plenty still to go. all i was trying to show was what i think is one extreme to the other, seeing as i have been there and done it that is all. not trying to put wind up anyone or prove any points just one against the other.

Hey Lee,

I definetly had the 8cm version and most power i made with the t517z turbos was 365rwkws...

Seeing your car at the show and shine with the BFT (big fu(koff turbo) i thought this car has come along way since i last saw it...

At the end of the day it something you had to try and its not the end of the world, if your not happy with the lag swap it for a smaller turbo and you should still have the same peak power but shitloads more midrange...

And remember dynos are tuning tools..... all dynos are different....

Cheers,

Jack

hey Jack cheers for clearing that up. yeah was good to see you at the show and shine would have been good to have a good chat, but mate needed to be home so had to leave early. hopefully i can get to a few more events and meetings now and do more club activities.

i know that i always have the opportunity to go back to a smaller setup but like you said i had to try it and i did, but i am also not saying i am not happy with the lag it is a totally different feeling to the twins.

And couldnt agree more "dynos are tuning tools..... all dynos are different...."

cheers mate

you can actually get T51R's to make power earlier...but it takes a fair bit of experience and r & d. Ive seen what we thought the was perfect set-up (made 500AWKW at 25psi on 98 pump fuel) come alive 1000rpm earlier and made another 50AWKW with a different approach to the port work and camshaft change.

ok i understand. maybe you could send me a dyno sheet showing this, i do believe you, its just to be honest i haven't really been able to find any dyno sheets for 2.6lt SPL's around anywhere to compare with. as ive also said it is still tuned very rich so deffinatley with more tuning ill be hoping to see better results.

cheers