I know a little about this, but you know what they say about a little knowledge......

whats the difference between a .48, .55, .60 exhaust housing? is it smaller number = less lag but less top end power?

size of the compressor wheel effects what?

Trim? whats the differencebetween 52 or 56 trim in the turbos performance?

I assume the compressor maps require the flow rate of a head and the required pressure and you work off of an area of the map.

If anyone can explain some of this SIMPLY I would be thankfull.

 

Would like to also know this

 

The larger the Exhaust housing the more lag but less restrictive it is. 0.48 is the size.

Trim is the size of the compressor.

 

where is the exhaust housing marked?

 

bttt until we get some answers.

 

The larger the Trim the more air it can flow.

 

so far then-

a .48 exhaust housing will give less lag and also less top end power due to restriction than a .55 or .63

Trim is the size of the compressor but is that the wheel or housing inlet? will a large trim and a small exhaust housing fight each other upon operation??

Is trim and the compressor wheel size related directly?

 

bttt. Am also interested in this. Maybe stu could do one of his layman terms essays?

 

as weare on the wondering subject... i have always pondered about what bttt means? Nothing to do with turbos tho ha ha ha

 

Back To The Top

 

bttt coz i wanna know too

 

still in need....

 

 

One for the FAQ????

 

Good lord.. all these questions... not sure ive consumed enough beer to do an essay like this just yet.....

 

no comment beardy

but this could be a good post ... once stu has had enough to drink ...

hmmm .. now there is a thought .. drink+passionford = oh bugger im banned again

 

Have you all read the:

"How a large turbo makes more power than a small turbo with the same boost pressure" essay i wrote?

Its very relevant

 

ermmmmmmmmmmmmmm ... nope


so ok .. on another tangent ..
if you have a stage 3 chip set up to a standard t3 turbo (cossie) but then want to change it for a t 35/34 .. i would suspect that the fueling pressure would have to be increased???

 

is that the fookin massive one stu ?

 

Thats the one about shifting a larger volume of air etc etc.

Really just a quick knock down of what the relivant numbers relate to in performance.

Really simple not techie talk please.

Lets not get this into teh Q&A section as I don't think many people go there.

 

Buy this book.... forced induction performance tuning by A. Graham Bell ....do a search on www.amazon.co.uk top book at it'll answer all your questions simpily and in plain english...

 

so .. what was the outcome

 

for craig (Although most of it will go over my head, I'd love to know...).

 

Well some of the essay required has ended up here:
https://passionford.com/forum/viewtopic.php?t=73030