if i go for the 3.4 what size injectors should i use??? i want performance, not stock

 

Haven't you read my swap thread.
That answwer is there.
Yes, you MUST get the 3.4 injectors when you get the engine.

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

well i didn't want to know i have to use

i wanted to know what i could use for better
performance

 

The 3.4 injectors are the same size as the 305 Chevy ones.
Two, the spray pattern is much improved upon the pintle style injectors with your 3.1 set up.
Using them solves every possible problem.

In other words, you win.

------------------
Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

yes but will they bump my HP up

i'm not saying 10 hp i mean every 1 or 2 i can get will help

what about using 350 spec injectors???

 

speaking of injectors... which ones will help the 2.8 out the most? Or are the stock ones good enough? hehe.. payce

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85 2.8L Sport Coupe 5-speed.
Mods: Hpertech chip and powerstat, MSD 6A-L, Crane fireball coil, Dynomax hi-flow cat and catback system with a dynomax magnum race bullet muffler on the i-pipe, K&N filterchargers, Eibach Sportlines and Tokiko springs/shocks setup, Global west sub frames, Suspension techniqs front and rear sway bars, and good ole 88 IROC wheels with Kumo Ecstas on em!
"I'm out to seek those pesky VTEC boys!" (don't get me wrong, I'm asian myself! hehe)

Wins: 2000 V6 Accord, 69 302 Mustang, 2000 Auto VR6 Jetta, 89 Toyota MR2, 90 Civic Si, 76 350 Camaro.

 

WOW antiVTEC nice wins, man

i especially hate those honda civics

-later

 

FROM WHAT I SAW,
MAYBE the 3.4 injectors will help.
THAT SAID, if your current 2.8 ones work right, you also win.
Meaning, if you cannot use what ya put in, it MAY backfire and work against your plans for more performance.
Like a larger carb on a small engine.
All you may do is (gas) foul out the plugs quicker.
Me?
I'd say plan on upgrading to the 3.4 block.
OR, keep making everything you have on your current engine work great, then go get the 3.4 block (hop up distributor, ignition system, they will swap over when ya get the bigger engine!, increase exhaust flow, too)

------------------
Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA