turbo school

[7.3HeavyHauler]

ok kinda at a loss here, my stock turbo is a 1.10 ratio, i bought another turbo and it will not fit because the ratio on it is 1.00, this compressor housing is bigger than the 1.10?? Now I thought the larger the number the bigger the housing but that is not the case here, the 1.10 has 4 bolts holding the housing together, the 1.00 has 5 bolts and obviously bigger, i tried to put this on my truck but like i said before the compressor housing is too big, hits the pedestal support on the drivers side, i thought about taking a grinder to it but i would have to take alot off which would include that allen head bolt that I am sure is a drain of some nature, if the pedestal was 1/4" higher this would work. The turbo i bought came from a 99, I am wondering if this was from an E99 and thats why it won't fit.

[Sticker Monster]

your question piqued my interest so I did a quick google search and found this...

Turbos, Turbo Selection 101

SM

[Solid98]

My Norton AV does NOT like that link. Says there is a bunch of malicious redirects.

[Sticker Monster]

interesting, ms security essentials has no problem with it.

SM

[AgTires4295]

The top of your link looks good, however about halfway down, it becomes garbled and text loads on top of text/pictures. Sounds like OP has an early 99.

[Sticker Monster]

here is another good page on A/R...

Turbine housing A/R and sizing | Turbobygarrett

but it still doesn't answer your question and seems counterintuitive to what you have.

SM

[7.3HeavyHauler]

well this really doesn't make an sense now, the 1.00 ratio is the pic i posted earlier which is bigger than the 1.10 that is currently on my truck. now according to garrett, the bigger the number the bigger the housing........ugh...gonna look at the turbo again on my truck to double check the a/r, this is making no sense

[blue99stroker]

a 4 bolt housing is an early 99 turbo.
the 5 bolt compressor housing is late 99-03
the mounts are different.

[7.3HeavyHauler]

got it, don't suppose you can put a late 99 pedestal on an e99?