josh77888
04-01-2009, 04:27 PM
i have a 93z i believe it has stock 24lb. What would you guys estimate on hp gains if i swapped over to 32 or 36lb injectors.
stock heads and i have a slightly bigger cam then stock.
Kevin Blown 95 TA
04-01-2009, 06:33 PM
You won't get a horsepower gain unless you are starving it for fuel right now and it is running too lean for lack of enough injector. With that in mind, larger injectors don't directly give you a horsepower gain.
Injuneer
04-01-2009, 11:52 PM
93 was the only year with 22 #/HR injectors. With your limited mods, they should still be OK.
MikeGyver
04-02-2009, 12:01 AM
Increasing injector size is done to allow greater fuel flow on engines that are flowing signicifantly more air and therefore require more fuel. (i.e. turbo, not cold air intake)
The computer will need to be retuned to rescale fueling.
josh77888
04-02-2009, 09:46 AM
but when i get heads, throttle body, bigger cam, and intake. thats when i should go up in fuel injectors? what size would be a good one.
and mine has 24lb already researched it.
Kevin Blown 95 TA
04-02-2009, 06:43 PM
but when i get heads, throttle body, bigger cam, and intake. thats when i should go up in fuel injectors? what size would be a good one.
and mine has 24lb already researched it.
30# maybe or slightly larger.
Injuneer
04-03-2009, 06:28 AM
Depends on the flywheel HP, quality of the tune, efficiency of the combustion chamber configuration, etc. As a minimum size, get an injector that is 0.07 X the flywheel HP. A 450 HP setup would require 0.07 X 450 = 31.5 #/HR minimum. In that case, I'd go with a 36.
Nothing wrong with going to a larger injector, within reason. It helps keep the duty cycle down. But you will not see any extra HP from the injectors' excess capacity.
mrmint69
04-03-2009, 07:56 PM
85 to 93 came with 22lb. Here an Ebay auction with the info. http://cgi.ebay.com/ebaymotors/FUEL-INJECTORS-22LB-1985-93-Corvette-Camaro-Firebird_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c6 6Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c 293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhash Zitem110329267642QQitemZ110329267642QQptZMotorsQ5f CarQ5fTruckQ5fPartsQ5fAccessories