Been looking all over the place, even emailed Precision (never replied...) and couldn't find any... any help would be appreciated. Thank you.

 

Ask, and you shall receive. However, the housings used in the application you're looking at are changed relative to this map that doesn't reflect the .63A/R and 2.559" turbine wheel. This is strictly the compressor map.

 

^how do you read those? always see them but never understood them.

 

https://honda-tech.com/forums/forced-induction-16/how-read-compressor-map-142398/

 

It looks like the pictures in the link the other guy posted aren't showing up. Just google "How to read a compressor map" and you'll find more information than you could ever possibly want.

 

There used to be a link in the Forced Induction forum...not sure if it's still active

 

So, i plotted the map, and i think this is too big for b18b?

I used the following numbers to plot the line... granted, this isn't strictly gt3251 map, but how far off of this gt32 vs gt3251? I don't think i should push it to 10psi either with a bone stock b18b?

 

Could someone tell me how will the 51mm vs the 71mm be different on the compressor map? Will the 51mm effectively shift the whole graph to the left side, making it a better match for the b18b? By the look of it now, it would only hit full boost making ~250whp at 6800 rpm right?

 

You aren't looking at this correctly. Full pressure is at 3400 rpms. The map is the compressor side. The Gt32 refers to the standard configuration. The actual GT3251 is based off the standard compressor wheel and modified exhaust wheel and turbine housing. There is only one 71mm wheel. Not a 51mm compressor wheel. Im working on a vid of tue ejtire platform after the holiday.