Single option is going to be a beeotch..

Here's a 460 Ford boat that I had.. Twins are the way to go.

Going to fuel injector or carb?

 

I have a 67bird I will turbo/fuel inject once I get a 'real' job, and I've determined that for a 5.7L sb chevy any of the big holsets (h2a, hx40, etc) would be great for them. IIRC I saw a 3.2L bmw guy say his H2A spooled around 3700.

I'd almost suggest two 57trims, if you can spool at 5k on a 1.8L motor, worst case you'd be fully spooled on a 454 by 2200rpm. And since you can hit 400whp EACH on a Honda with pump gas, more with C16, you're looking at an easy 750whp. Two 60trims or sc61's would be closer to 1000.

Just look at some supra forum. The max WHP may be lower with a given turbo (esp if you carb it), but the spool time will be cut in half (3.2L I6 vs 7.4L V8...)

 

Gt47e's can ussually be picked up for a good price. I have a friend that has 2 of them new in the box. They have twin scroll inlet with a t5 flange and I think the turbine housings are around 1.19
They somehow slipped out of the CAT plant. I'll see if he is interested in selling one, if so I will shoot you his number. I doubt he will ever use them, he is running a blown alky setup in a in a all steel 1946 chevy pickup. Last trip to the track it clipped of 152mph!!so I doubt he is changing anything

 

2 holset hx40/50 or 55. 4 or 500$ for both will last forever and make all that power with a faster spool then a nigg er

 

I have a T4 60-1 that I was gonna use in my Z but my be changing direction. Brand spanking new and also comes new v-band also.

 

Like spiker said, i've got a T6 flanged garrett TMF55 that you could use if you don't want to pay 1500-2000 for something.

https://www.homemadeturbo.com/forum/...?topic=86524.0