I've got all the bits on the way for the new engine, depending on when they arrive I should have it up and running in a month or so. Soooooo . . . I've been looking at turbos (the fun bit!).
Original plan: Sp61GT. Excellent spool, but I think it's going to be a little too small for me. I want something that will seriously embarass a 4-500hp MkIV and give me full boost around 4000rpm.
Medium plan: SP63. Everyones got one, or so it seems. I've seen some really good numbers out of it, but usually running REALLY high boost on rocket fuel. I want something that will perform well on pump fuel, street boost. Not just one time dyno blasts.
Loony plan: CTC67H/SP67. I think from what I've read that these are pretty much the same turbo. It seems that all the pieces are there; users report hitting full boost at 4100rpm with boost building way before that, even on pump fuel it should make enough power to annihilate street tyres in the first three gears, and once it hooks up there are only a few MkIV's in the country that will hang with it.
So it all sounds good for the 67. BUT. I don't want to go to a full standalone for $$$ reasons, my plan was to retain the Lexus AFM which I have, and upgrade my 550's for 780cc injectors along with a twin walbro pump setup (two feeds to the stock fuel line, one return). Then use the E-manageto work it all. I was also hoping to hang on to my Clutchmasters Stg 3 clutch as that's only been in for a year. I reckon all those pieces would work well for a smaller single, but are they going to be completely overwhelmed by a bigger single?
I think what I'm saying is . . . if I want to keep to my planned fuel/management/transmission setup, will I be able to work the 67 hard enough to get any advantage over a smaller turbo? Or will I have to put up with the extra lag without being able to take advantage of it's greater potential because of lots of bottlenecks in my setup.
I don't want much, just an 11 second daily driver which is reliable and has a nice powerband
Original plan: Sp61GT. Excellent spool, but I think it's going to be a little too small for me. I want something that will seriously embarass a 4-500hp MkIV and give me full boost around 4000rpm.
Medium plan: SP63. Everyones got one, or so it seems. I've seen some really good numbers out of it, but usually running REALLY high boost on rocket fuel. I want something that will perform well on pump fuel, street boost. Not just one time dyno blasts.
Loony plan: CTC67H/SP67. I think from what I've read that these are pretty much the same turbo. It seems that all the pieces are there; users report hitting full boost at 4100rpm with boost building way before that, even on pump fuel it should make enough power to annihilate street tyres in the first three gears, and once it hooks up there are only a few MkIV's in the country that will hang with it.
So it all sounds good for the 67. BUT. I don't want to go to a full standalone for $$$ reasons, my plan was to retain the Lexus AFM which I have, and upgrade my 550's for 780cc injectors along with a twin walbro pump setup (two feeds to the stock fuel line, one return). Then use the E-manageto work it all. I was also hoping to hang on to my Clutchmasters Stg 3 clutch as that's only been in for a year. I reckon all those pieces would work well for a smaller single, but are they going to be completely overwhelmed by a bigger single?
I think what I'm saying is . . . if I want to keep to my planned fuel/management/transmission setup, will I be able to work the 67 hard enough to get any advantage over a smaller turbo? Or will I have to put up with the extra lag without being able to take advantage of it's greater potential because of lots of bottlenecks in my setup.
I don't want much, just an 11 second daily driver which is reliable and has a nice powerband
