4A Engine Family Intake Manifold Ports at a glance

Post by **dr.occa** » Thu Oct 30, 2008 10:18 am

the following are views of the intake port layouts of the 4AGE/GZE/F/C w/ respective p/n's (if available).

4AGE/GZE - intake (largeport w/ TVIS) FEL-PRO p/n: MS92148

4AGE - intake (smallport) FEL-PRO p/n: MS94516

4AF - intake FEL-PRO p/n: MS94135

4AC - intake & exhaust FEL-PRO p/n: MS90873

Post by **CBR_TOY** » Thu Oct 30, 2008 4:18 pm

informative.... nice find

Post by **nt66** » Thu Oct 30, 2008 4:31 pm

4ac makes me want to set myself on fire. all 4 of its intake ports are smaller than two of the ports on the tvis plate and it has 8

Nasser · Post by **Nasser** » Thu Oct 30, 2008 4:36 pm

would the second gasket on the large port fit on mine i want to take out my tvis completely since i already have it disabled and i wanted to remove and port the tvis because i have seen write ups where people do that like how this dude did http://www.gtfours.co.uk/default.htm?ht ... s/tvis.htm go to-how to-modify-remove and port tvis

Post by **nt66** » Thu Oct 30, 2008 4:50 pm

that website is not talking about 4ags and your car wont benifit from removing the tvis it will only LOSE power on the low end But it wont gain any on top. If your still going to do it anyway you HAVE to use the top gasket for the blue top in the picture the bottom one wont seal the intake directly to the head. Also you have to get gze intake manifold bolts becasue the blue top ones are to long with no tvis. Also I would strongly recomend not trying to port anything it is very easy to screw stuff up with bad port work

Nasser · Post by **Nasser** » Thu Oct 30, 2008 4:53 pm

very well i am convinced

i will still be removing the tvis since it is open all the time.

Post by **nt66** » Thu Oct 30, 2008 4:57 pm

Nasser wrote:very well i am convinced i will still be removing the tvis since it is open all the time.

why not fix it so it works correctly?? gain that 10 to 15 hp back on the low end??? The way it works is super simple shouldent be hard to make it work

Nasser · Post by **Nasser** » Thu Oct 30, 2008 5:02 pm

their was a dyno sheet that showed a 2hp gain floating around somewhere either way allot of people run without it and stock 4age's have made over 100hp without it on so idc much for it i noticed more of a difference with it off.

Post by **nt66** » Thu Oct 30, 2008 5:17 pm

lol your not going to feel a 2hp gain on top what you dont understand is your losing power from 1000rpms to 4500rpms thats the 10 to 15 im talking about. Im making over 160hp and im still running it it adds power at lower rpms when vacume is high. It opens as soon as the vacume gets low (above 4500 rpms) it adds a very small amount of restriction for the gains down low. The reason toyota put it on there is because the blue top ports are to big and flow to much air at lower rpms which reduces power. This is why the later small port engines have smaller intake ports so they dont need tvis and dont lose low end power

Nasser · Post by **Nasser** » Thu Oct 30, 2008 5:27 pm

blah

Post by **CBR_TOY** » Thu Oct 30, 2008 6:14 pm

i think will knows what he is talking about so i'd pay attention youngster....

i need to hook mine back up. i'm not even sure if it's hooked up or not actually

Post by **nt66** » Thu Oct 30, 2008 6:30 pm

yeah toyota had no idea what they where doing they just put it on there because they felt like wasting some money

Nasser · Post by **Nasser** » Thu Oct 30, 2008 7:08 pm

finally some1 gets it

Post by **CBR_TOY** » Thu Oct 30, 2008 7:27 pm

it's called sarcasm.....

Nasser · Post by **Nasser** » Thu Oct 30, 2008 7:32 pm

thanks cbr_toy for correcting me on that