Finally someone else who points out that the color of the lettering on the cam covers isn't a reliable way to identify the different 4A-GE's. I can certainly appreciate video's like these, but you are pretty focused on the head design. I know that's where the terms 'Bigport' and 'Smallport' come from. But there are some differences in the cylinder blocks of earlier and later 4A-GE's as well. Very early 4A-GE's (In both the AE86 and the AW11 MR2) used 3-ribbed cylinder blocks with 40mm bigends on the conrods instead of the 42mm bigends and 7-ribs of the later blocks. They also used 18mm piston pins which were pressed in instead of the 20mm piston pins which were held in place with retaining clips. So both the cylinder blocks and the internals were beefed up with later blocks. Not a direct difference between smallport and bigport 4A-GE's, but still something to look out for if you are looking at the 4A-GE engine in general.
Thank you i appreciate it!! 😁☺ and thanks for the great info! I will definitely make sure to incorporate it when i Talk about the 4age engines again! Thank you for the awesome comment 😁👌
@@Tuned4Speed it was cool and stupid me I didn’t know it. I knew it was fast, but I wanted a Honda Civic or Prelude with a sunroof. Just a stupid kid. Mine was a 1991 and beat my friends NA 1987 300z. Totaled that car with 180k on it and insurance paid me $3500.
big port had the faulty designed oil pump, the small port have redesign improve oil pump ( which the 20v 4age also use). small port has higher compression ratio, make 130hp vs 112 hp. stronger block and crank. over all, the small port beat the big port in every cat, the down side is finding one cause it was only made from 1990 to 1991 so there are not alot of them around.
@@darylthorne3225 the different is in the teeth of the pump, the first generation oil pump got the square teeth shape. and over time it caused crack inside the oil pump. the second generation oil pump got a more thicker inner teeth with round shape, it create less friction and don't cause crack like the old one did. the second pump was used from 1988-1991 4age, 1988-1999 the 4age is still the big port with tvist but the oil pump is new. the 1990-1991 the 4age small port came to birth. no more tvist which is a good thing cause now the intake port all open up all the time vs the tvist system which close some intake port and only open all when a certain rpm reach. the small port compression ratio is 10 vs 9 from the big port. back in the 90 compression ratio of 10 is consider advance at that time.
@@Tuned4Speed no prob. The fist gen 4age 16v had 3 rib block, 40mm big ends and the small end was press fit 18mm. The 2nd gen big port 4age had 7 ribs, 42mm big end and small end 20mm onwards. The cam duration is also a bit diffent. 240s in the fist gen,. 232 in the 2nd gen big port and small port.
Well if your getting a smallport from an ae92 which is fwd. Then youll have to transfer some components off of your rwd in 4age like for example the wateroutlet housing by intake side of the engine is different on the rwd smallport vs your rwd 4age. Basically youll have to transfer your rwd 4age parts as well as get the smallport intake. Also the smallport has a knock sensor while your bigport ae86 doesn't. So just some small differences but once sorted out it goes really smooth
Well if your getting a smallport from an ae92 which is fwd. Then youll have to transfer some components off of your rwd in 4age like for example the wateroutlet housing by intake side of the engine is different on the rwd smallport vs your rwd 4age. Basically youll have to transfer your rwd 4age parts as well as get the smallport intake. Also the smallport has a knock sensor while your bigport ae86 doesn't. So just some small differences but once sorted out it goes really smooth
Hey evening bro i from trinidad & i'm looking for ah trottle body for a 1600 bigport the air screw has to be working tho may be if you come across one you can call me or somthing
Another guy who doesn't actually know the progression of changes to the 4AGE and trying to sound like an expert. All it would have taken was an additional ten minutes of research before turning the camera on.
Hey! Definitely appreciate the comment and feedback man, can't wait to make more content for you guys on the 4age, definitely keep your eyes peeled for the next 4age video and share your thoughts on the improvements on the info I've made man! Appreciate you and thanks for watching! 😁
The bigport can be turbod and still have a great setup but The smallport is better because all small ports had a 7rib reinforcements on the block when the bigport only had it in it's 2nd generation. Also the smallport had oil squirters, a better cylinder head that provided smaller ports which got rid of the bigport 4ages main issue at low rpms hence why they deleted tvis in the smallport 4age . Oh and They all added a knock sensor. 4age smaller ports increase air velocity down low to improve torque and power at the lower rpms In general both 4ages can do great with turbos but the smallport has it's advantages but the bigport has it's as well. Hopes it helps thanks for watching!
Have to give a thumbs down because you didn't explain the difference between early big ports and the later ones. 3 rib to 7 rib block, increase size of crank journal and piston pin size and oil pump gear design, plus oil squirters- all happened before small port head was introduced. Your not the expert you portray yourself to be.
Thanks I definitely appreciate the info! There's a decent amount of things I missed and didn't touch on but hopefully soon Ill come out with a more updated video that's talks more about the big port! since this is videos more between the bigport and small port 4ages differences
@@Tuned4Speed I have had my MR2 S/C for a year now and I'm going to start collecting parts for my rebuild, I have no intention of a 3S swap. I see no point, and I want to keep this car original. Some of us value the heritage represented by older engines, and I don't need or want 300bhp in this thing.
But to help you out the bigport 4age made around 112 to 115hp depending on which generation bigport you had. The small port 4age made around 123hp to 128 hp depending on what market you were in and if you had a maf or map sensor.
Your the god of 4age wish I knew you I had 2 cars toyota Corolla fx 16 gts I use it for.my daily never red line it i couldn't afford for it to break down youtube MOTOIQ a Japanese American who work for Ted he said 4age was garbage he said the block and and the oil pump but the corolla 92 block is good youtube motoiq 4age will last week a fx16 gts 40000 miles original paint was like new only had 3 grand while I was talking to the seller an old white guy 64 years old interrupt the sell and shows the 5 grand I should of borrow the rest of the money it a fun motor to drive
Hey man!! And thanks alot definitely means alot !! Theyre really great cars! Try to get your hands on one man theyre such a blast!! And yeah i remember seeing his videos
If you loved this video be sure to check out our New video on HOW TO MAKE 300HP IN 3 MINS ON YOUR 4AGE!! ruclips.net/video/PxEtyTAuaaM/видео.html
Finally someone else who points out that the color of the lettering on the cam covers isn't a reliable way to identify the different 4A-GE's.
I can certainly appreciate video's like these, but you are pretty focused on the head design. I know that's where the terms 'Bigport' and 'Smallport' come from. But there are some differences in the cylinder blocks of earlier and later 4A-GE's as well.
Very early 4A-GE's (In both the AE86 and the AW11 MR2) used 3-ribbed cylinder blocks with 40mm bigends on the conrods instead of the 42mm bigends and 7-ribs of the later blocks. They also used 18mm piston pins which were pressed in instead of the 20mm piston pins which were held in place with retaining clips.
So both the cylinder blocks and the internals were beefed up with later blocks.
Not a direct difference between smallport and bigport 4A-GE's, but still something to look out for if you are looking at the 4A-GE engine in general.
Thank you i appreciate it!! 😁☺ and thanks for the great info! I will definitely make sure to incorporate it when i Talk about the 4age engines again! Thank you for the awesome comment 😁👌
Aw11 mr2 came with the 7 rib bigport 4age.
ruclips.net/video/Sur01w0S8hs/видео.html
I had the small port in a Geo Prizm GSI. I didn’t even know what I had at 17yr old. Man I miss that car now. That was an amazing engine.
Damn that's really cool!! Yeah I feel you man they're really awesome engines, and sound amazing
@@Tuned4Speed it was cool and stupid me I didn’t know it. I knew it was fast, but I wanted a Honda Civic or Prelude with a sunroof. Just a stupid kid. Mine was a 1991 and beat my friends NA 1987 300z. Totaled that car with 180k on it and insurance paid me $3500.
@@douglowry7382 felt I did the same! That's really cool tho man hopefully you find another some time! That was a good payout
big port had the faulty designed oil pump, the small port have redesign improve oil pump ( which the 20v 4age also use). small port has higher compression ratio, make 130hp vs 112 hp. stronger block and crank. over all, the small port beat the big port in every cat, the down side is finding one cause it was only made from 1990 to 1991 so there are not alot of them around.
Yess definitely spot on! Fortunately got lucky enough to find a gts with a small port lol
How can you tell the difference between both oil pumps
Can a small port oil pump work on a bigport
@@darylthorne3225 it can but u wouldn't want a faulty design,
@@darylthorne3225 the different is in the teeth of the pump, the first generation oil pump got the square teeth shape. and over time it caused crack inside the oil pump. the second generation oil pump got a more thicker inner teeth with round shape, it create less friction and don't cause crack like the old one did. the second pump was used from 1988-1991 4age, 1988-1999 the 4age is still the big port with tvist but the oil pump is new. the 1990-1991 the 4age small port came to birth. no more tvist which is a good thing cause now the intake port all open up all the time vs the tvist system which close some intake port and only open all when a certain rpm reach. the small port compression ratio is 10 vs 9 from the big port. back in the 90 compression ratio of 10 is consider advance at that time.
Also definitely check out How to swap do a 4age swap! ruclips.net/video/AOnSo92mnW8/видео.html
4age 16v had a 3 rib and 7 rib block in big port. The small port also has a external oil drain which the big ports dont have.
Thanks alot for the info! really really appreciate it and it definitely helps us all out
@@Tuned4Speed no prob. The fist gen 4age 16v had 3 rib block, 40mm big ends and the small end was press fit 18mm. The 2nd gen big port 4age had 7 ribs, 42mm big end and small end 20mm onwards. The cam duration is also a bit diffent. 240s in the fist gen,. 232 in the 2nd gen big port and small port.
@@carbonehouseholdcarbone8110It's a crankcase breather, not oil drain.
Thanks for the info bro was definitely usefull
No problem man! Glad it was! Hope it helps
How hard is it to put small port into ae86..is it just change intake around..??
Well if your getting a smallport from an ae92 which is fwd. Then youll have to transfer some components off of your rwd in 4age like for example the wateroutlet housing by intake side of the engine is different on the rwd smallport vs your rwd 4age. Basically youll have to transfer your rwd 4age parts as well as get the smallport intake. Also the smallport has a knock sensor while your bigport ae86 doesn't. So just some small differences but once sorted out it goes really smooth
Well if your getting a smallport from an ae92 which is fwd. Then youll have to transfer some components off of your rwd in 4age like for example the wateroutlet housing by intake side of the engine is different on the rwd smallport vs your rwd 4age. Basically youll have to transfer your rwd 4age parts as well as get the smallport intake. Also the smallport has a knock sensor while your bigport ae86 doesn't. So just some small differences but once sorted out it goes really smooth
Very informative, thank you. I am going to pick up a 4age from the mr2 for my 86, so excited
Not a problem! And that's awesome congrats! Definitely excited for you
@@Tuned4Speed thanks! Now i just need to figure out how to make it work in the corola🤣
@@eightyseveneightyfive6280 lol that's always the fun part 🤣
The ae82's also had 4age, I believe the same as the ae86
Yes they definitely did!
Hey man i am from trinidad wi i am trying to find a tvis trottle body can you find one with air screw working
Hey evening bro i from trinidad & i'm looking for ah trottle body for a 1600 bigport the air screw has to be working tho may be if you come across one you can call me or somthing
Hi and I'm sorry I don't know anyone with one at the moment but when I do I'll definitely let you know
Another guy who doesn't actually know the progression of changes to the 4AGE and trying to sound like an expert. All it would have taken was an additional ten minutes of research before turning the camera on.
Hey! Definitely appreciate the comment and feedback man, can't wait to make more content for you guys on the 4age, definitely keep your eyes peeled for the next 4age video and share your thoughts on the improvements on the info I've made man!
Appreciate you and thanks for watching! 😁
Lmao My man’s still salty from a month ago?😂🤣
My geo came with a 4age
That's awesome!
why is the small port is better for turbocharging like I seriously want to know.
The bigport can be turbod and still have a great setup but The smallport is better because all small ports had a 7rib reinforcements on the block when the bigport only had it in it's 2nd generation. Also the smallport had oil squirters, a better cylinder head that provided smaller ports which got rid of the bigport 4ages main issue at low rpms hence why they deleted tvis in the smallport 4age . Oh and They all added a knock sensor.
4age smaller ports increase air velocity down low to improve torque and power at the lower rpms
In general both 4ages can do great with turbos but the smallport has it's advantages but the bigport has it's as well.
Hopes it helps thanks for watching!
new sub here!!
Great thanks! and welcome to the channel takumi😁! Lol perfect topic for you
ruclips.net/video/Sur01w0S8hs/видео.html
Big Ports are good for 200+ hp
Yess👌✌😎
Have to give a thumbs down because you didn't explain the difference between early big ports and the later ones. 3 rib to 7 rib block, increase size of crank journal and piston pin size and oil pump gear design, plus oil squirters- all happened before small port head was introduced. Your not the expert you portray yourself to be.
Thanks I definitely appreciate the info!
There's a decent amount of things I missed and didn't touch on but hopefully soon Ill come out with a more updated video that's talks more about the big port!
since this is videos more between the bigport and small port 4ages differences
These engines are irrelevant now. Its like an old man explain antiques lol
Lmao naw these engines will always have they’re place, regardless of how slow and outdated they are stock lol ppl love this engine plateform
@@Tuned4Speed I have had my MR2 S/C for a year now and I'm going to start collecting parts for my rebuild, I have no intention of a 3S swap. I see no point, and I want to keep this car original. Some of us value the heritage represented by older engines, and I don't need or want 300bhp in this thing.
@@mescko nice man! Yeah definitely go for it! That’s pretty awesome to hear!
Dont say anything about power diffrence.. tumbs down
But to help you out the bigport 4age made around 112 to 115hp depending on which generation bigport you had.
The small port 4age made around 123hp to 128 hp depending on what market you were in and if you had a maf or map sensor.
Your the god of 4age wish I knew you I had 2 cars toyota Corolla fx 16 gts I use it for.my daily never red line it i couldn't afford for it to break down youtube MOTOIQ a Japanese American who work for Ted he said 4age was garbage he said the block and and the oil pump but the corolla 92 block is good youtube motoiq 4age will last week a fx16 gts 40000 miles original paint was like new only had 3 grand while I was talking to the seller an old white guy 64 years old interrupt the sell and shows the 5 grand I should of borrow the rest of the money it a fun motor to drive
Hey man!! And thanks alot definitely means alot !! Theyre really great cars! Try to get your hands on one man theyre such a blast!! And yeah i remember seeing his videos