carb to efi swap??? - Page 2 - Toyota Nation Forum : Toyota Car and Truck Forums

freakinbox · 06-02-2006, 01:35 PM

ah.

lots of spare head's at the wreckers I can get redone

Flashmn · 06-02-2006, 02:34 PM

Yeah well, if you plan to stay N/A, the 1st gen head is junk for the purpose. Go with the 2nd gen head, but you'll need to get the crankpulley and tensioner from the newer one too, the timing belt is toothed differently and is longer.

freakinbox · 06-02-2006, 05:38 PM

wonder what 4age pistons would do in a 4af/4afe

toyotaspeed90 · 06-02-2006, 07:09 PM

meh... just throw in 7afe pistons... you'll stay non interference and yield a higher CR

freakinbox · 06-02-2006, 10:02 PM

except I thought the bore would be different? due to the 4afe being a 1.8 liter

Flashmn · 06-03-2006, 08:12 AM

Bore is same, stoke is different.
The 4A-GE pistons in 4A-FE has been discussed, its a pathetic attempt at best imho. If you want to gain compression, just dish out the money for a set of forged wisecos.

freakinbox · 06-03-2006, 10:54 AM

I am still wondering out of the carb or efi set up which is better. I think if I went and put duel carbs on and went with higher compression I would need to go and buy a fuel cell with a larger capacity just so I don't have to fill up all the time.

Flashmn · 06-03-2006, 12:05 PM

and the increase in the weight makes whatever benefit came with the carbs nil.

EFi is better, plain and simple. I've done single, dual and quad carb setups on corollas and now I'm doing efi, because its just plain superior.

freakinbox · 06-03-2006, 02:49 PM

well not really. The extra weight would allow me to turn faster. since right now the rear is trying to kick out when the front tires heat up and the rears don't as much.

efi is better for economy... top end dragsters use carbs still. so does nascar from what I know. which leads me to think that for preformance carbs are the way to go.

Flashmn · 06-03-2006, 04:25 PM

Well YES really, the more mass you have, the more time it takes for forces to affect the object. Its really basic physics.

Quote:

since right now the rear is trying to kick out when the front tires heat up and the rears don't as much.

Uhm and you think few liters of gas is gonna change that scenario? I dont think so. Plus still during braking you're gonna have weight move forward and that heats the tires the most.

Quote:

efi is better for economy... top end dragsters use carbs still. so does nascar from what I know. which leads me to think that for preformance carbs are the way to go.

Really you're still thinking that? Nascar rules dictate the use of carbs, top fuel dragsters have moved to injection already, tho some classes the rules wont allow it. Plus the problem before was you didnt get injectors that flowed enough and didnt take nitromethane, since unlike gasoline, it kills rubber and can hurt aluminium parts and you have to flow TWICE as much nitromethane as gasoline for the same power. Also have WRC cars, F1, which have had fuel injection quite long now. Carbs are moving to the past, EFi has surpassed them long time ago.