i know 750 is alot on a 305. thats one thing but would it cause the car to run or feel good in the lower of 4k rpm then at wide open throttle cause a bogg or just a sluggish feeling?

 

Wouldn't be surprising.

 

thnaks for the replay. i mean oviously too much fuel can cause a bog at wot but just confirming im not so big into carbs. im thinking maybe a 600 cfm would do it good?

 

Actually, too little fuel causes bog, and too big a carb is a great way to get too little fuel for the air being dumped in the engine.

600 CFM would be better, yes.

 

Again thanks. great info. Im going to be picking up a car this weekend if the seller is avalible to meet up.

87 z28 5 speed. needs some work but runs and drives. so hopefully ill have 2 3rd gens by the end of this weekend.

it use to be tbi and still has the wiring and computer for it. but i think ill stick with carb.

I have a 75 350 4 bolt main block sitting in my garage i might just rebuild it close to stock spec. and that 750 will be much better with it.

ill have to be careful with driving it dont wannt break the t5 with the 350. but a fairly stock 350 should be fine if i baby the clutch a little more.


Edit. I take that back just refreshed my memory on the 87's in the 87 data. its either CCC or tpi wiring? humm maybe ive got and eve nbetter find going on here. its a 305 for sure block code 460777 305 from 78-79 2 bolt main. so its not the stock block for sure. humm.

Any more input on this year of the z28 modle would be apriciated. ive focused most of my 3rd gen info on the TPI's

 

'87 would either be CC carb or TPI, correct (unless V6, of course). In any case, it would have come from the factory with an in-tank electric fuel pump. That often isn't properly handled when converting to non-computer, so that's the first thing I would check.

2nd thing is the heads. '77-'79 305's got terrible heads, generally speaking.

 

Yea its deffinatly in tank fuel pump. what would i have to do to make the in take work with carb?

if it turns out tpi im just going to convert it back. for sure but CCC i think ill just keep a basic carb on it.

and im not sure if the heads are 77-79 or not that will be something i look at when i have it in my hands. but im thinking if its a 79 block in a 87 it could have a different year heads to. we will see.

thanks for the info and help. maybe ill know exactly what to do allready when i get it

EDIt ----- Its an H so it was Originally CCC Would it be worth going back to CCC over just a carb? would the CCC work on a fairly stock 350 motor without chokeing it. And ive read some information about the distributor and the carb having to match up. if its a non CC dist. would i have to go back to a CC dist. to make a CCC work.

thanks

 

CC carb isn't choking my engine. I put a 650 CFM Holley spread bore on it for awhile, the CC carb actually had better 1/4 mile MPH than the Holley.

I don't know if you would call my engine "mild" or not. In a lot of ways, it is, but mid-13's with 2.93 gears sounds pretty healthy to me.

I believe all the factory did for '87 carb models is use the in-tank electric with the engine mounted mechanical with return. I've been using an engine mounted mechanical with return only with no problems, so having the electric pusher should just be that much better.

 

alright so i dont have to do anything to the in tank fuel pump to have it work with a carb? no regulator to lower the fuel pressure or anything?

i mean all of the wiring and computer is still on the car just zip tied off to the side for the CC carb so im wondering if it would be worth it to go back to CC or just go buy a 600 or 650 cfm electic choke non cc carb.

basicly i just need to know what i have to do to run either setup.

and it just has a plate covering the mechanical fuel pump bolt up. so im assuming it probably doesnt have any return at all? So i would need to buy either a electricle or mechanical to return. (what problems would this be causing the car not having a return with the in tank pump?

if i went with CC carb what do i need to convert it back from the non CC it is now.(grant it has all the wiring allready and comp.)

or if i went with keeping it non CC carb and just bought an more sizeable carb for a stock 305. do i need to regulate my fuel pressure lower. or just get rid of the intake all togather. (i would like to keep the in tank as its working perfect right now why change it)

thanks

 

For stock to mildly warmed over motors you will not do better then a Q-jet. I don't know of a single person who has swapped on a E'brock, Holley, Demon or something else onto a mostly stock 305 or 350 and not been plagued with bogs, stumbles, stalling or hard starting issues.

Stick with Q-jet you won't be sorry.

 

i wouldnt mind that at all but i havent even bought the car yet. this weekend is when im picking it up and it has a fully mechanicle with eclectical choke on it for a carb right now.

what do i have to do to it to get it back to CC carb.

Im not sure if the dist. is CC or not even if it is a CC dist. and the guy put a non CC carb on it then thats probably the wot problem itself as it not advancing the timing acutartly. right?