For the love of a tractor engine: The life and times of the 18R-G

[73Sell_Liquor]

Jeez, that never dawned on me. Thanks Suave. I'll look through the dizzy mount on the timing cover.

[73Sell_Liquor]

Ok, might have her back together tomorrow. I'm confused bc the RG Service manual crank pulley has 3 marks and mine has 4.

I believe the crankshaft keyway was in this position when I had timing cover pin lined up with mark furthest to the left. We'll call that number 1 position.



Before I set the cam slots back to 12 o'clock. Which mark should I be on for the crankshaft pulley mark?

[o_man_ra23]

The one in the picture looks to be TDC. As the crankshaft rotates clockwise when viewed from the radiator, and nobody ever worries about ADC timing marks as all ignition events occur prior to the piston reaching its peak (except in circumstances such as knock control, rev limiting, overboosting etc), the last timing mark on the pulley which reaches the pin during a rotation is always TDC, and that is the left most.

[73Sell_Liquor]

Easy way to remember TDC on a car. I thought these mark might be some weird Toyota only 18RG different stuff, & I didn't want to muck it up. Thanks for clearing it up. I'm on my way to the shop this morning, & hope to fire her up today or be really close. Wish I could buy you a cold six pack. Thanks X 1 million. Thanks Owen, you're a godsend.

Damon

[o_man_ra23]

bah, simple stuff I learned years ago champ, happy to pass the knowledge on. Just hoping you get her going and get your project back on track.

[2004lowlux]

has anyone got a set of factory 18rg carbies? deciding the efi setup is going to be a nightmare so i figure carbie would be easier

[Slidin23]

hey i know this is the 18rg thread...

but have many people in here played around with 22re's? i have one in my drift car atm and am looking for some advise on how to get this thing to rev... wont go past 5000 looking at making it atleast rev till 6000 or 6500... thinking head work???

can anyone point me in the right direction? i can find info on google but its all american crap and they use them in trucks and want low down power... i want a little more up high!!!

and before you say. yes i know they have a long stroke and are limited by this. but im just looking for it to rev till about 6000 or atleast till stock limiter which is at 6500.... surely head porting/flowing will help this?

[cheviotrola]

Hey Toymods, first post here although I joined in 06, thought you might be interested in these parts I spotted through Yahoo Japan and Import Monster

New TRD oil pump 18RG roughly $500 landed
Import Monster | View 18RG TRD

New 18RG 2.2 pistons
Import Monster | View 2TG 18RG 2 2L

Heard the pump's pretty rare so I thought I'd share

[o_man_ra23]

Slidin23 - firstly, what have you done to the motor? The stock ECU will likely need to be turfed. The cam will need to be changed to a lumpier item. The dizzy will probably need re-graphing, though you should be able to lock it and use the new ECU to determine the timing events. After all this, you can look at porting, larger valves, higher compression etc to give you more power, however those items on their own won't make it rev.

[Slidin23]

what i have done is mild crow cam. replaced all timing gear chain tnesioners ect. pod filter. extractors with 2 1/4 muffler into 2 1/4 strait pipe. lightened flywheel and heavy duty clutch.

got it tuned by brenton at fours and more and it made 75.9 kw's atw's on a not so happy dyno... he said its the best he has seen with such little mods. also made the same amount as torque as a stock 20v 4age.

the problem is it has nothing and i mean nothing after 5000. he said an adjustable cam gear will help make the cam go into the top end... eg get it to about 5500 maybe.

what im wondering has anyone played around with head porting in these? thinking this will be my next and last step to get a little bit more outa this engine.

i would be happy as to have roughly the same power but just top have the thing to rev a bit more freely...

what im asking is has someone done this? did it work? will head porting make it rev. all the americans seam to do it but they arnt using them in corona's or for drifting. there using them for pulling trailers and low down power...

i dont wanna change computers and all that expensive shit. i just wanna replace head do some porting and see what happens...

[Rodger]

Slidin.

Ok now that I have read the post correctly and read Owen's response below.

I agree with Owen's comment about the ECU. Toyota would have matched the ECU with the abilities of the stock 22R-E. That being the cam spec and design of the intake system. The OEM cam runs out of puff beyond 5000 or so as designed so the ECU would only need mapping not much beyond that. Injectors and fuel supply would only need to reach a similar point. The Dyno should show what is happening to the mixtures. If Toyota was doing what it does now the mixture goes rich to stiffle power beyond that 5000 mark.

A 22R-E should rev to 7000 with your combination and it is the ECU holding it back. Ignition timing is by-the-by. All 32 odd degrees of advance should be in by around 2500rpm (check factory manual).

Headwork can be done but you may quickly reach the limit of the actual Intake design and throttle body sizing and already are at the ECU limit.

Regards

Rodger

Regards
Rodger

[o_man_ra23]

Being a single cam, adjustable cam gear will advance/retard both profiles (in and ex) evenly, when you normally want to advance one and retard the other to create more overlap.

If you take the same power figure and move it up the rev range, it will decrease torque and your car will run slower. If you have the same torque output as a stock 4A-GE with a mildly worked 22R-E, you have problems. The 22R-E should have buckets more torque, just at a much lower RPM.

If you want to drift, you need torque, with a well matched gearing ratio. If you want it to rev higher, then you want to move the torque up the RPM, which will increase your power output.

I still think head porting isn't going to move you from 5000rpm to anywhere near 6500rpm, for this you need cam profile, good spark profile (22RE stock profile isn't real good for RPM - I would change the spark control mechanism as mentioned previous), and an ECU that will handle it. You may also need bigger injectors (try ebay for "1G DSM Injectors" they will be from an early Honda Talon and are perfect for what you want) to supply the fuel at those RPM as your stock injectors will be fairly small. In fact I think the single biggest gain you will have at this stage is converting the dizzy to an electronically mapped system (try MegaSpark - or look into a MegaSquirt 2 ECU for a good value for money option).

[Slidin23]

i have the same torque or a little more than a stock 20v 4a which have bucket loads of torque..... not just a normal 4a....

my tuner said a adjustale cam gear will bring it into the higher rev range... which is where i need it... im making all my torque at like 2000 rpm...

apparently head porting helps the motor rev freely...... im not after theory. im after someone who has done porting and what affects it had on reving. im after 1000 more revs... i dont think thats alot to ask for...

like i said i dont want to change ecu or anything like that. to expensive i know i will make big gains here but spending money on this 22re is not an option. i have a 18rg in my celica i would rather spend money on...

im just after that little bit more..... i feel once i do this i will hit the wall of cheap gains and have to pour money into it to gain lots. and i just wanna push the cheap gains as far as i can. at the moment im almost happy. it i can get it to rev freely i will be happy

so anyone done head porting on a 22re or even an 18r single cam? what were the affects? did it give you anymore up high?

[o_man_ra23]

All I can say is that if you can get a 20% rev gain from porting for less than the cost of the ECU change out (if your power level doesn't increase by 20%, then your torque will have decreased) then you are doing extremely well (22R-E ports aren't THAT small).

Factory torque specs:
early 22R-E 185Nm@2800rpm
late 22R-E 192Nm@3200rpm
4A-GE 20V 162Nm@5200rpm

I think you are misled somewhere, or your motor is fooked...

[Slidin23]

ill get my dyno sheet tomorrow.... and post it up. i dont want more power or massive gains.

i just want it to rev a bit freelyer... if thats a word :/

im doing an adjustable cam gear which my tuner said will get the cam to hold on to about 5500 ish. if i can just get 800 or even 500 more revs and a more rev happy engine from porting i will be happy... extatic infact.