turbine wheel-
73.09mm ----- 64.00mm
which is 76.673277 trim

compressor wheel-
75.01mm ------ 55.09mm
which is 53.939537 trim

t3 flange .84 ar housings

opinions on spool time?? 350 ci summit 1104 113 aluminum corvette heads hopefully on e85

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Pretty sure you will be near instant spool on that, I would guess without running numbers you would see 12-15lbs before 4k.

You can run the number thought and plot it on the map yourself. Here is the formula below.

Airflow rate = cid x rpm x 0.5 x Ev divided by 1728

 

That turbo may be dangerously small for that motor.

 

If I read your sig correctly, you're planning twins???

 

yes sir its going to be 2 sorry i diddnt clarify i know the ar on turbine is a lil big but its a t3 flange. twin scroll

 

I have a pair of 57mm T3/T4s and they are spooling HARD by 60'~100'.

 

whats the ar on the exhaust

 

.60 compressor/.63 exhaust

 

mine are .50 comp, .84 exh

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is your carb home brew or bought?

 

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i know it looks like junk now but at least it would be fast ( i hope)

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I stated with a BG carb, and did all the mods myself, both to switch to E85, and for blow-through.

 

what are your base tuning for the e85 in the carb ? if you dont mind me asking

 

Well, in the beginning, it was still N/A, and a couple friends talked me into trying E85. I had enough fuel pump and fuel system, so my friend Mike loaned me his spare raceone85 carb. It was set up for his 383, so it was pretty close to what my motor needed. I liked it, and decided to make the switch. I started doing research on what was needed, and found this: http://members.tccoa.com/392bird/carbtech.htm . Suddenly, Mike's primary carb started acting up, and he needed his spare back. So I did a quick teardown, measured every orifice, freshened the gaskets, and gave it back. Then, between his measurements, and the ones in the link above, I decided what I was going to start with on my own carb. I have all that stuff written down somewhere at the shop, but most of it was pretty close to what's in that link above. I opened my boosters up to .170", which was easy because the BG carb boosters are held in by a nut on the outside of the main body, you can take them out and switch them, or mod them and put them back in. After drilling them out, I took some thin strips of emery cloth, blew them through the passages, and polished the drilled passages a bit to eliminate any burrs or turbulence. My jetting is 88P, 99S, and I'm using a BRPV I did myself, there are some pics in one of the BRPV threads, and it's referenced to turbine pressure. I'm using 50cc pumps primary and secondary. I'll look for the rest of the specs when I get to the shop later.....

 

cool thanks we should be pretty close so if i start rich ill tune down . rather be rich than broke!!!

 

sorry for the delay rickracer. bout to get back to the vega build again

 

I blew mine up due to not enough fuel pump, (enough volume, but not enough pressure), building a cheap .040" over 2 bolt cast crank hyper flat top spare for now, working on some heads for it, doing up a pair of W/P S/Rs I've had laying around for w few years, gasket matching, raising the port roofs, hopefully wind up about 180~190 cc intake ports, (started at 165).