WeatherGuy

I'm considering converting my 422 over to a forced induction setup, and have a couple of questions since I don't know too much about FI.

Basically, I would take my 422, put in 8.5 to 1 pistons, and then run about 7lbs of boost from either a blower or twin turbo setup. Realistically,

1) Would the blower or twin setup be better?
2) Would my engine be able to live a decent amount of time if boost is limited to 7 lbs? While I am going more and more drag racing, I would still want to drive it on occasion on the street.
3) Could I run this with pump gas safely?
4) What kind of power could I get from this. I currently get 495 RWHP all motor, but that's with an 11.3 to 1 CR.
5) Aluminum block/heads OK for this boost level, with appropriate gaskets, o-ringing, etc.?

Any opinions?

Black LS1 T/A

What RWHP and RWTQ goals do you have in mind?

The lower compression would decrease your NA RWHP maybe 50 or so, but the blower could add a couple hundred back to that.

How many RPMs will your motor spin up now? With that large a motor, depending on the type of rotating assmebly and your heads and cam setup, your RPMs range could vary. If you spin high revs, a blower would work well. If you give out of rev's soon, a turbo may add the most power and torque in that RPM range... but, with such a big-cube motor, would you be able to harness a large increase down low and hook it up to justify the cost?

Decisions, decisions! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

WeatherGuy

The motor I have spins up to 6800 (limiter), but the valvetrain/bottom end is probably good for about 7000. I like some safety margin though.

Basically, I'm looking for about 675-700 RWHP. And I would like it to be semi-reliable. Though I could easily go higher here, warped heads, blown gaskets, etc. start scaring me pretty quickly. Also, hooking up beyond 700 RWHP, on street or track, = <img border="0" alt="[jester]" title="" src="graemlins/gr_jest.gif" /> without killing the car's streetability.

What would pick up torque quicker for the 60 ft. The blower?

Black LS1 T/A

60'?

I'd say getting traction! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Beyond that, turbos generally have mad torque down low. But with a 422's bottom end torque, I'd say the top-end is what you'd want to enhance.

What kind of stroke and bore does your 422 have?

I'd REALLY talk to an expert at GWP to get the best information. If you are not careful, you could get less gain than you expect.

What size valves are you running with your heads?

scottywheels

I have a blower but with the set up yo uhave id go t juice and run a 200 shot and go 9's.

VINCE

iTrader: (1)

That would be an awesome setup.. We need to get these forced induction setups on the road.. I am not going to get one until 5 people have reliable setups..

WeatherGuy

I've done some checking, and it seems that finding a *reliable* blower that can feed a 422 is not currently in the cards. That, and being warned about running one in Houston heat (which is 2/3 of the year here) has kind of scared me away.

I still want to go to a FI setup on a 422, but I think I am going to wait a year or so yet. IN the meanwhile, I am going to put on a 150 wet shot, and convert to a 200-4R with a PY3500E. That should get me really close to a 10-flat in a near full-weight car. At least I hope so . . .

BLOWNMERO

Experts at GWP??? You better try your luck with a turbo setup