just wondering if this conversion is worth my moneys, about how much hp to be gained from a 390cfm holley and the arizona z car 4bbl manifold?-like to be rid of the primitive fuel injection on this thing.
thanks

 

If there's nothing wrong with the F.I., its not worth it. You'll waste your money on something that doesn't make any more power than the F.I. All you're doing is changing your fuel delivery system and reducing your gas mileage. Plus more stops to the gas station.

 

well theres nothing wrong with the fi that i know of, it just needs retuned every week, getting a bit tired of it

 

What needs to be retuned?

 

the afm, keeps going back to rich. as of now it sarts up fina and then about 10 secs into running it drops rpm to like 400-500 and barely runs, have to keep my foot in it to 1000 till it warms up after 5 minutes, and then its fine

 

Is the AFM bad or just needs constant adjustment? I have one for sale off of an 80 for $25. Its a 5 prong (P/N : A31-618-420)

 

i have no idea, I have a friend here in boise who is a z specialst (owns his own shop) and i have to take it in for a new heater core so im gonna have him look at it again. but I'll let you know

 

Sounds more like a problem with the cylinder head temperature sensor and/or the cold start injector.

 

cold start injector sprays fine, last i checked, will check the temp sensor

 

you sure it wont raise hp? just talked to my z specialst mechanic and he said it will raise the power. I guess I'll research some more

 

No offense but your "z spe******t mechanic" is either a shister or an idiot since he knows pretty much nothing about the stock EFI system. Anyone who knows anything about tuning an engine (and I don't know a whole lot myself but I do) know that your power comes from your spark timing advance which is based on vaccum and mechanical advance on the NA and the ECU controls it on the turbo. You can squeeze a little from tricking the stock AFM to enrichen the mixture but it's hardly worth it unless you have a cam in there that you want to try to get something out. There is no beating a tunable system though....

Going from a primative EFI to a carb is still going backwards. You can still only tune the AFR and only roughly at that with a carb....

 

Lol - apparently s p e c i a l i s t is a bad word

 

Lol, there is like a 2mpg difference between a properly tuned carb and efi and that comes from fuel shut off when you let off the gas.

Your best bet is a z31 efi swap if you don't want to deal with completely stone age efi.

 

Fixed. It has "Cialis" in it, which was on the anti-spam list.

And we've discussed the "EFI to CARB conversion" soooo many times... How many new cars come from the factory w/ carbs these days?

 

right and 20 years of experience means nothing to you, he had the carb conversion on one of his cars. 'no offense'?! what the ****, If your main purpose was not to insult someone dont start it with no offense and then insult someone

Why arent admins doing their jobs and kicking some *** right now
I find this forum rude and unhelpful aside from hoov who was somewhat friendly in his response
thanks have a nice day

 

eh? There are no forum rules against posting opinions based on facts.

Also, you asked a VERY generic question, and one that has been asked and answered many times before... we have discussed 4barrel swaps, triples, etc...

Also, you recently asked "how much power can a stock L28E handle from being turbocharged?" ( https://www.zdriver.com/forums/280zx-performance-technical-79/l28e-t-33938/ ).

Are you wanting a turbo, a carb, a 10 second car?

Like Jerry Maguire says... help me help you.

 

haha how about you go ask that question on Zcar.com

make sure you put on your flame retardant suit before TonyD gets ahold of you (:

oh the joy of being a young high school kid who knows everything, and they all seem to have a "z specialist who owns their own shop"

 

Im out of college with a 2 year degree, and I would be the first person to tell you that I dont know eveything. and I do have a friend with his own Z shop you can drive out to Idaho if you dont believe me, stop making assumptions about me for questioning an answer because I heard something different.

Nismopick- I was referring to his insulting comments regarding my good friend("the no nothing z mechanic of 20 years")
Im trying to figure out my options and choose the best one by process of elimination

"No offense but your "z spe******t mechanic" is either a shister or an idiot since he knows pretty much nothing about the stock EFI system."

most forums would have booted his *** by now, just saying.

 

ok, since you don't want to listen to anyone's advice, here is what you want to year. "Yes it will make GOBS of power with a arizona z car 4 barrel manifold and a holley carb." Problem solved

 

Not to mention they are SUPER easy to come by these days...

https://www.zdriver.com/forums/showt...hlight=arizona

/Sarcasm.

I can think of MANY other / better things to spend $400-$600 on than a carb setup that will actually make worth while power.

 

all I did was question an answer, and that means I don't want to listen? ok.
I heard what was said
-most help with issue early on
-Z31 ecu swap
-less mileage by 2mpg (debatable)
-go check the other threads
-tell him what we think he wants to hear instead of answering his question
bout sums it up
instigation is clearly key in ****ing up someones thread
RB25 it is then. since Im clearly bothering everyone with my questions

 

You aren't "bothering" anyone. This forum is here to help everyone, but as you previously stated:

And when you state something like this, what do you expect us to say???

The 280zx EFI is as simple as EFI gets.

 

note: I did search. now maybe I didnt search long enough or with the right terms but all I found was my thread and a bunch of other stuff that had very little to do with answering my question.
Saw the 4bbl conversion; got excited about it because I keep having to retune my **** and posted without taking a whole lot of time to search. I guess Im in the mood to diffuse this argument ATM.

 

let me give you a piece of GOOD advice, do your searching on hybridz.org and zcar.com

the archives there have GOBS of information that is FACTUAL evidence, not hear say like some of the information is on here.

 

Such as?