4AGE block differences explained (incl. some eyecandy)

[Alex170984]

[Walaki]D`Lair Wrote:

Alex170984 Wrote:This has already mangled my melon

Is this why perhaps my other 4age seemed a hell of a lot more responsive because it had higher comp pistons in it?

Am I really going to be able to make 150+ hp with my mods with these piddly pistons in comparison to high comp?

Turbocharge the fuck out of it!

Nah it'd ruin the driveability of the car - supercharge yes, turbocharge no.

[[Walaki]D`Lair]

Alex170984 Wrote:

[Walaki]D`Lair Wrote:

Alex170984 Wrote:This has already mangled my melon

Is this why perhaps my other 4age seemed a hell of a lot more responsive because it had higher comp pistons in it?

Am I really going to be able to make 150+ hp with my mods with these piddly pistons in comparison to high comp?

Turbocharge the fuck out of it!

Nah it'd ruin the driveability of the car - supercharge yes, turbocharge no.

That is exactly my fear too...so I bought an SR20DET :mrgreen: :mrgreen: :mrgreen: :E

[oldeskewltoy]

Not so much candy.... but factory service manual info never the less

Rod clearances AE86 and AE92


Rod Clearances AE111


Mains...

AE86


AE92


AE111

[Bean]

Coming along nicely, although I wasn't a big fan of club4ag still a lot of info has been lost since it crashed.

[ditn]

Yes i had alot of info bookmarked there,should have saved it to the pc

I will take out the engine/crank in the weekend and take pictures then,
not possible right now.
Should lift the mystery arround hybrid 4AGE from late 1986/1987 a bit

[Alex170984]

Due to realising that I have indeed got 9.4:1 low compression pistons – I am yet to double check if I even have a 7 rib block – as I just assumed it would be!

Did the engines which these pistons were used in, run TVIS?

My TVIS did not work even though I swapped over two manifolds – it could just be a loom fault however.

Could someone clear that up for me poss?

[Bean]

Alex170984 Wrote:Due to realising that I have indeed got 9.4:1 low compression pistons – I am yet to double check if I even have a 7 rib block – as I just assumed it would be!

Did the engines which these pistons were used in, run TVIS?

My TVIS did not work even though I swapped over two manifolds – it could just be a loom fault however.

Could someone clear that up for me poss?

All bigports were running TVIS. Simply put the TVIS is based on 4 parts:
the flaps with actuator, vacuum canister, vacuum hoses and trigger solenoid.
Obviously if any of those are faulty or wired/connected wrong way it won't work. Also a non TVIS ecu is a possibility.

[Alex170984]

Its not the ECU as that is still the original supplied with my MR2.

I did swap a working tvis manifold from my old mr2 engine onto this one and it didn't work, so it must be a loom fault.

[Alex170984]

Mercifully I do indeed have a 7-rib block!

So, if I have low comp pistons does that mean i have a low comp engine?

[Bean]

the block has technically nothing to do with compression - so yes low comp pistons equal low compression