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DIY - How to forged and build a turbo 4a/7a motor

54K views 35 replies 15 participants last post by  pnyk33  
#1 · (Edited)
Ok guys for those that want to build there motor to handle boost , i will post everything that needs to be done to have a good built forged motor. this is my build.

1. things you need .
arp rod , main and head bolts - 4agze motor
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Cp pistons 4agze rods and ze crank
note: you can not use the crank or rods off the 4ag. on the 7afe only the pistons can be used.
go to Belfab Racing.com they have 7afe forged rods. you will have to use the stock crank.
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you can see the two 4afe next to 4agze rod.
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time to put the pistons and rods togeather.
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Now dropping in the crank and bolt down the main bolts , arp 60 foot lbs
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Time for the Head
Note : you can use 4age valves the intake are the same size round but the exhaust are a little bigger , take it to the machine shop to have it worked out.
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i am using 4agze exhaust valves , because they are bibber fastair coming in and fast coming out.
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Time to drop the pistons in.
Note : Make shore the rings are gapped right for your style
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Torque down the rod bults to 40 foot lbs.
turn the crank to do the next set.
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#2 · (Edited)
Now time for toga oil pump water pump and pulleys

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Arp head studs and HKS head gasket.

Note: arp head studs torque down to 60 foot lbs and you will need to grind the first two arp studs so that the camshafts can turn free`ly or you can just put oem head bolts.

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Time to slap on the head , camshaft , cam and timing componets.

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#4 · (Edited)
Now time to drop that baby in.

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Make you`r friends hate you as they look. lol

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Ok the list of things needed for a good build.

1. a good machine shop these are my friends that did mine .

head job , valve job

block decked bored over to 83mm

balance and blue print

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#5 · (Edited)
Motor .

Head . bronze guids , new oem valves and springs valve stems .

or if you want bigger , 4agze valves. arp head studs 4agze.

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camshaft work .

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Block . stock 4agze pistons , rods and crank not for 7afe motor

pistons- cp, je or stock

rods- stock 4agze, crower rods

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bearings . main and rods.

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Oil Pump

Toga oil pump

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ARP ROD BOLTS TOYOTA 1.6L 4AGE DOHC 4ALC M9 203-6001

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ARP MAIN STUDS TOYOTA 1.6L 4AGE 2.0L 3SFE DOHC 203-5403

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ARP Head Studs TOYOTA 1.6L 4AGE DOHC 203-4203

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the brains

piggyback or standalone if you go piggyback you will need to check valve it or get a 3sgte map boost sencer.

piggyback

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Ok guys if anyone ever desides to use the Apexi SAFC 2 on there 7th Gen, corolla 4a or 7a there are 2 ways to do it. First is if your Rolla is Auto you use diagram 1 and the ECU code diagram is T5-C . Now if your corolla is Manuel you use Diagram 2 and the code is T4-b.

1. Auto Tranny , T5-C
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2. Manuel Tranny , T4-b
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Note :

When doing this Always SODER your Wires on the EMU wires. Do not SPLICE. :thumbsup:



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what you might need to do.

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3sgte map

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Standalone:
Microtec LT-10
universal or 4age

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Megasquirt

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#6 · (Edited)
Head gasket

HKS metel any size.

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Fuel.

pump , mr2, ae86, supra and celica

walbro 255

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Injectors. your stock clips

440cc 7mgte supra

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3rd gen 460cc RX7

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Note: 93-97 corolla are saturated injectors not peak and hold. to tell the difference you would need a ohms meter and if they read under 10 ohms`s they are Peak and hold or if they are over 10 ohms they are saturated .

If you go aftermarket this is the best for the buck you will need the clips to.

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If you use the stock fuel regulater you will need this 12.1 FMU

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or if you want to get something better , you wont need the FMU

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The 3 most important gauges you need to have on your car.

AEM wideband

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if you dont have this on you car this is what will happen.

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Oil Pressure

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Boost/vacuum : Try to get the boost/vac and not just the boost gauge.
It`s just as important to read Vac as it is to read Boost.

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Spark Plugs :

it would not be good to use the stock spark plugs on your corolla , in time they can and will melt the tips

this will work great on the car and will fit are motor.

if you dont want to step it down to 6 or 7 down the stock on the wrx will work great

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NGK BKR7EIX iridium spark plugs for wrx/sti .
These Iridium plugs are one step colder then stock, which are less prone to detonation at higher boost levels.
Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling

* Fine Iridium tip ensures high durability and a consistently stable spark
* Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
* “Trivalent Metal Plating” has superior anti-corrosion and anti-seizing properties
* Outstanding acceleration, high fuel efficiency and durability
* Ultimate design, technology and performance


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Now when its all said and done all the HEATERS will say this when you blow by them.

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#9 ·
Great write-up man. I'd love to do this one day but unfortunately I don't have a money tree in my backyard, haha. This guide looks excellent though, the pictures are helpful and basically speak for themselves. Good to know that there's a resource available like this if/when I ever go for the forced induction option. Nice work.
 
#15 · (Edited)
Custom Build would be your best bet. :D
miib14WOW!!!!

nice write up bro...

WOW!!!!

nice write up bro...


thanks Man here to help. :cool:

HELL. YES!!

Great writeup. You definitely know exactly what you are doing especially with a turbo buildup. Very impressed! Any videos? I am going to save this page in case I want to get crazy with my rolla.
thank you sir and here is the First dyno run with the new built Motor. :thumbsup:

 
#21 · (Edited)
What kind of clutch are you using? im bossting 0.5bar only and my clutch are slipping from 3000rpm if I WOT.

Im still on stock clutch and its a 2 year old clutch +cover about 50.000 km
Well my Tranny was rebuilt , The the Gear ratio was changed up to handle the power torque Con. shift kit & LSD. it ran me $2,000 to do it. But if you don't want to spend that much all you have to do is get a Silver or Black top Tranny and get the clutch kit and that will do good
up to only 250hp.

Kevin McDonaldAwesome information! And a very magnificent car u got right there, man! :thumbsup:

May good fortune be with u a all the time.... :chug:
thanks Bro, Just tring to help People out , even the ones that come on here asking for Help and then they start acting like a DumbAss.
 
#27 ·
Love the engine!!

Have you taken into consideration to get back a stock/clean style? Im talking about the outside.

You are in the US, have you tried to get the FX front bumper? It will definitely love your car!!

Can you imagine the face of a honda owner when you show him the car and then you open the hood? LOL that would by EPIC! hahhahahha

What is the brand of those wheels?
 
#28 · (Edited)
Love the engine!!

Have you taken into consideration to get back a stock/clean style? Im talking about the outside.

You are in the US, have you tried to get the FX front bumper? It will definitely love your car!!

Can you imagine the face of a honda owner when you show him the car and then you open the hood? LOL that would by EPIC! hahhahahha

What is the brand of those wheels?
thank you sir, and yes i have been looking for a fx bumper, i have someone looking for me . but not rushing to get one right now my car is done for now. i`ve been finishing my S14 tying to get some work meister 3peace rims lol, very pricey. :eek::eek:

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trying to make my S14 look like this.....:D

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Sorry before i forget my rims are Volk Racing LE28 .(le have a crome lid while CE is all one solid color) these rims are discontinued. not made anymore. no matter what anyone says i wont get rid of them. this is one of my Rare Japan parts. :D

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#29 ·
Obviously you got money man! haha


maybe is the color of the rolla that makes it look kind of different on those wheels. THOSE ARE THE WHEELS, love the wheels!


im trying to get some wheels. maybe OZ, the rota slipstream or something but here in CR is kind of difficult, actually lets say EXPENSIVE $$ haha
 
#30 ·
Obviously you'er Wife got money man! haha


maybe is the color of the rolla that makes it look kind of different on those wheels. THOSE ARE THE WHEELS, love the wheels!


im trying to get some wheels. maybe OZ, the rota slipstream or something but here in CR is kind of difficult, actually lets say EXPENSIVE $$ haha
fixed . lol :clap:


just be carfull with rota rims i know some people that had there rims break apart. :eek:
 
#32 · (Edited)
New found Info

i was at CFT checking some cars getting Dyno when one of my Friends thats building a 7age came in with his 1.8 rod and pistion. we were talking about his build when i started to ask rolo about what i can use as an altenitive rod i grabbed a b18 rod and checked it out. Bingo!!!!
Same size except for the pistion pin hole is bigger then the 7a.
So i took the 7a pistion and stuck it in a b18 block....bingo . the same thing , it fits. the b18 has same bore size 81mm. now you can get b18 pistion from any forged maker . The only thing that has to be done is the cut the crank to fit the rod & bering on to the crank.
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#33 ·
i was at CFT checking some cars getting Dyno when one of my Friends thats building a 7age came in with his 1.8 rod and pistion. we were talking about his build when i started to ask rolo about what i can use as an altenitive rod i grabbed a b18 rod and checked it out. Bingo!!!!
Same size except for the pistion pin hole is bigger then the 7a.
So i took the 7a pistion and stuck it in a b18 block....bingo . the same thing , it fits. the b18 has same bore size 81mm. now you can get b18 pistion from any forged maker . The only thing that has to be done is the cut the crank to fit the rod & bering on to the crank.
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Hmmm givin me ideas honda stuff seems ezer to get than 7afe stuff so honda b18forged rods and pistons in a 7afe than turbo?

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