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406 W/TPI injector sizing?

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Old 11-07-2010, 08:51 PM
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406 W/TPI injector sizing?

Hey guys, been reading around this board for a little while now and figured I go ahead and join. I have been trying to seek some info on the set up I plan on running in my toyota rock crawler. Here it is:

-406 all forged bottom end (Scat or Eagle, currently working out the details with the builder
-9.5:1 compression with 72cc heads (10:1 + with 64cc, for the future)
-Plan on running Patriot aluminum 185 cc runner, 72cc combustion chamber, angle plug, part # 2170 (just while the engine is in the truck, plan on changing them out with better heads if I choose to sell off the truck and use the motor in a street car/truck. Also using them primarily for the cost)
-Comp Cams hydraulic flat tappet extreme energy 4x4 cam and lifter kit, part # CL12-243-3
-Comp Cams magnum rocker arm kit, stamped chromoly roller tipped, 1.52, part #RPR200
-Summit circle track oil pan with extra trap doors welded in, part # SUM-121002
-Billet double roller timing chain (really any of the name brands)
-TPI set up off an '87 camaro, stripped it down and thoroughly cleaned, EGR deleted, cold start deleted, 58MM throttle body, new ARP bolt kit, new Felpro gasket set...

So that leads me to this, I am trying to figure out what size injectors I need/want to run (LB injectors). I do not plan on porting anything out due to the fact I do not need the upper end HP. However I do not want to lean out the motor and possibly hurt something and would like to size the injectors accordingly. I have done quite a bit of reading, and am not new to the forum thing (a frequenter on the Pirate 4x4 forum) and know how people get irritated by people not searching. As it stands with the knowledge I have now I am planning on running 30 LB injectors

Thanks ahead of time and if this thread is out of place sorry.
Old 11-07-2010, 11:42 PM
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Car: 89 K3500 Fleetside
Engine: RAT *tbi* EBL
Transmission: TH400
Axle/Gears: 3.73-Dana 60
Re: 406 W/TPI injector sizing?

I think this one will be helpful to you.

http://public.sheet.zoho.com/publish...man/calculator
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