Hi,

I currently have a T34.48, light blues, RS500 cooler etc, and after a little mishap have replaced the standard head with one thats got 25/26mm ports, matched manifolds, cut back valve guides, etc. The head is good for a comfy 500.

The car is booked to be mapped on the 18th by Karl, and I've been thinking of changing to Siemen's blacks and a bigger T34 housing. Initially I was after a .63, but someone has offered a .55 - how much power will the .55 do?

Really I'm after 400 BHP. I can't go to a T38 or T4/GT30 yet as the bottom end is standard although rebuilt and its a 205 block so I don't want to push my luck too far!! It should be OK for 400 though?

Cheers.

 

the .55 wont make 400, infact a .63 will just about get there, on a proper live map, on a sweet engine and turbo a .55 could make 380 at a push but i reckon 370 really on a .55

 

As above 370 bhp,go for siemens blacks and .63 housing thats what i have and its brilliant.

 

why not ask karl?as he is going to mapping it?i have the same spec as u on a .55 mapped by karl he est around the 370 mark

 

Mine is on a .55, 400s with mild head porting and has made 372bhp on a Dyno Dynamics RR & 376bhp on a Dastek RR, thats only holding 22psi as well.

Steve.

 

is that not 376.4 steve

 

It was 376.5

Steve.

 

Lol,they all count.