think bout goin carb'd what ya think

[coupe5ohh]

sup guys im thinkin bout goin carb'd on my 94 it wont be a dd once i do this cuz im gettin a free honda from my cousin..here is my parts list so far..what combo should i run with ported gt40 heads,tfs1 cam and full exhaust:
dizzy:
-stock replacement out of a 85 roller cam motor
spark controller:
-msd 6al or 6al2
carb:
-holley
-street avenger 670
-600dp milled choke tower,mechanical secondaries
manifold:
-weiand stealth
-airgap dual plane
-torker
then for misc parts:
-vacuum lines
-gaskets(carb,manifold gaskets and tstat housing)
-throttle cable(from any carbd 302)
-fuel pressure reg.
-fuel pressure guage..
what you guys think open to suggestions on parts lmk

 

[5litrarag]

So its gonna become an offroad or track car? Or are you just gonna find a "sympathetic" tech when smog time comes around?
If you dont know how to setup or tune a carb car, I think you are asking for a hard time for no good reason.

 

[ivan12]

Why are you switching? Sorry I know I'm not much help, I'm just curious and thought I'd ask

 

[coupe5ohh]

So its gonna become an offroad or track car? Or are you just gonna find a "sympathetic" tech when smog time comes around?
If you dont know how to setup or tune a carb car, I think you are asking for a hard time for no good reason.

its gonna be a once and a while weekend car and eventually a track car..but i have my smog taken care of..and i have friends that know how to set up/tune the carb

 

[coupe5ohh]

Why are you switching? Sorry I know I'm not much help, I'm just curious and thought I'd ask

easier to mod,cheaper power,dont have to spen money on tunes,fuel pumps,injectors,mafs..you know all the extra stuff you have to buy to make a lil more power...and it makes for a really nice and cluuter free engine bay..lol just a plus

 

[rz5.0]

+ fuel pump.

 

[CompOrangeSN95]

you do need to put a new fuel pump in it, and maybe a ballast resistor. When I did my swap I rewired the car too so idk if the stock harness has one or not. Plus I don't use a box, just a coil and dizzy haha

 

[BigTang]

sup guys im thinkin bout goin carb'd on my 94 it wont be a dd once i do this cuz im gettin a free honda from my cousin..here is my parts list so far..what combo should i run with ported gt40 heads,tfs1 cam and full exhaust:
dizzy:
-stock replacement out of a 85 roller cam motor
spark controller:
-msd 6al or 6al2
carb:
-holley
-street avenger 670
-600dp milled choke tower,mechanical secondaries
manifold:
-weiand stealth
-airgap dual plane
-torker
then for misc parts:
-vacuum lines
-gaskets(carb,manifold gaskets and tstat housing)
-throttle cable(from any carbd 302)
-fuel pressure reg.
-fuel pressure guage..
what you guys think open to suggestions on parts lmk

I think its a huge waste of money for a GT40 headed motor.

That said here's what I would do:

Cartech fuel pickup
mallory fuel pump
Holley 750 DP
1087 cam
Weiand xcellerator intake
Stock distributor rewired and locked out

 

[CompOrangeSN95]

a 750 would be to big for a 302... just sayin and I don't understand why you think it is a waste of money.

 

[BigTang]

He has little to gain going carbed. That combo would better benefit from a $200 used intake and staying EFI than it would from a $1200 carb swap.

I'd like to know why you think a 750 is too big? Manufacturers reccomend a smaller carb because the normal end user can't properly tune one. A 600 will mask issues because of the stronger signal and appear to run better.
A properly tuned 750 will run circles around a properly tuned 600 all day long on a 302. Call some of these custom carb places. I bet they suggest something larger than a 750 for a strip/street weekend warrior 302 combo.

 

[CompOrangeSN95]

I have 650 on my 302, I did a LOT of research and talked to a lot of shops and all of them said a 650 is the biggest carb I should put on it... My car only drives on the track. Putting a bigger carb on it would be a waste. And what $200 intake are you talking about? Not to mention I did my entire carb conversion for just under $300... my car is just over 100 pounds lighter, is easier to tune (for me), and runs stronger than my EFI ever did... although the EFI was all fucked up so that didn't help anything haha

 

[BigTang]

jesus christ everyone on this board argues so hard to keep misinformation a top priority.

 

[CompOrangeSN95]

yeah that was my plan... I'm talking from experience, I'm not just pulling this out of my fucking ass. Bottom line is if the dude wants to put a carb on it he doesn't give a fuck if you think "its a huge waste of money for a GT40 headed motor" he wants to know what will work.

 

[BigTang]

You're absolutely right. I don't know shit. How many motors have you built? How long have you been building them? How quick have you gone w/ stock parts? Sounds like the reason you aren't pulling the info from your ass is because your head is in there.

how can you say that he doesn't give a fuck if its a waste of money when he fucking asked for opinions on the setup? Go back and finish 5th grade so you can improve your reading comprehension and learn to do some basic math so you can figure out flow rates and why a 750 will run better on a small motor you fucking hick.

That said I stand by my statement to run the 750, the motor will accelerate better, be more responsive and you'll have room to grow with it later on.

I choose parts that make results at the track. This is why my 300 hp motors keep up w/ the other guys 400 hp dyno queen motors.

 

[CompOrangeSN95]

Thanks for the explosion, the only thing I agree with is the room to grow, Mr. Texas. You're entitled to your own opinion. You should be a fucking cop cause you're real good at taking what someone said and making it into what you want. Keep writing essays dick head, I'm done here.

 

[rz5.0]

lets keep TEXAS out of this

 

[duh09]

jesus christ everyone on this board argues so hard to keep misinformation a top priority.

You still haven't explained why its a bad idea on a GT40'd motor besides cost but CompOrange has already said he did his entire swap for $300. You're as much of a cause of misinformation as anyone else.

I've been considering the same swap for awhile simply because it's lighter and makes a lot of stuff easier to work on, however, I'm planning on sticking with EFI until my current motor takes a pop because it's already there and working just fine for now.

 

[russ8825]

If you can get past emissions, than go for it. Like someone else said, if its nothing to crazy stay around a 650cfm. I was researching this swap a few years ago on a fox i use to have.

 

[BigTang]

He didn't state that he was willing to change his heads in the original post so I didn't get into it, besides there is another debate down the page over the usefulness of GT40's.
Basically they aren't that good of a head and won't show much if any gain by going to carb. To properly do a carb swap you need to change the fuel lines, you just can't supply what you need using the stock lines. You can keep the stock feed line as a return line to save some $.
EFI is no harder or easier to tune than a carb, parts end up costing the same if you're buying used.

I'm not sure how it makes things easier to work on by going carb? If you're doing it simply because you don't like the stock style plenum hanging over the valve cover then get a shorter runner intake and a cam to make up for the reversion issues that causes.

I'd like to know how he managed to do it properly for $300, key word is properly. A good fuel pump costs over $150, just the fuel supply side of the system on my last carbed car was $900, including all the AN fittings, the braided line, A1000 pump, sumped tank, etc. I suggested budget friendly options that would work w/ the GT40, why was that over looked.

Why didn't anyone mention that the dual plane intakes that the OP listed weren't the right way to go for a performance application? Those only exist because the factory trying to smooth out the low end and not looking at high RPM performance numbers. I'd suggest a vic jr intake if he had the intake runner to match, but no amount of porting will make that happen so he's limited to 1250 sized intakes.

 

[modo]

750 DP is overkill for a gt40 headed 302. 600 is all that is needed and there is no need for the second accelerator pump either. if you want some wiggle room get a 650.


guess i should take my 650 dp hp off the 289 and put a dominator on it since it will run faster :laughing4: