1989 AW11 MR2 Pistons,rods and cranck

[dethpool]

Can we use de MR2 Pistons,rods and crank in a 7afe, if is posible that, what others changes we have to do?

[toyotaspeed90]

in a 7afe? no. You'll have little to no compression.

[Donald]

If you want to do something with a 7A, your best bet is probably getting high compression pistons from Weisco or someone like that. The Weisco set will cost you about $600.

Swapping on a 4A-GE head and pistons will probably give you more gain, but will be a lot more work.

[pnyk33]

Nope. only the Pistons you can use . there is also a company in Australia that sell forged rods for the 7a motor if you want the crank stronger just cryo treat it.

[Donald]

Originally Posted by pnyk33

Nope. only the Pistons you can use . there is also a company in Australia that sell forged rods for the 7a motor if you want the crank stronger just cryo treat it.

"Spool" is the name of the Austrailian compamy makes the rods. But before you need rods or cryo, you will be needing to do other work and spend a lot more money and then it starts becoming effort in diminishing return.

At that point you would be getting more from a 20V or GZE swap for that kind of investment.

[toyotaspeed90]

WTF.

both of you should know better. I don't want to hear how you don't like me and that I'm just being an ass. Your information is wrong.

If you want to use the 7a then you can do a simple 7age build. It involves usually using some 7afe and some 4age parts. One of the easier and better options is:

7afe block, crank, rods
4age smallport high comp pistons (the 7a wrist pins are 20mm and the 7a is the identical bore to the 4a) and rings
smallport 4age head

(that's the short of it).

If you just want to use a 7afe and make a little more compression then use a set of 4afe pistons. They aren't the same and you'll increase in compression. Parts are easily found.

the 7a is a 1.8L.... same bore, so the stroke is longer. This is accomplished with the 7afe crank that has a longer throw on it, and it also requires the longer 7afe rods. many will say that you need to use a different sent of rods if you want to increase power, but actually the weaker point of the rods is the bolts.

[eage8]

Originally Posted by toyotaspeed90

WTF.

both of you should know better. I don't want to hear how you don't like me and that I'm just being an ass. Your information is wrong.

If you want to use the 7a then you can do a simple 7age build. It involves usually using some 7afe and some 4age parts. One of the easier and better options is:

7afe block, crank, rods
4age smallport high comp pistons (the 7a wrist pins are 20mm and the 7a is the identical bore to the 4a) and rings
smallport 4age head

(that's the short of it).

If you just want to use a 7afe and make a little more compression then use a set of 4afe pistons. They aren't the same and you'll increase in compression. Parts are easily found.

the 7a is a 1.8L.... same bore, so the stroke is longer. This is accomplished with the 7afe crank that has a longer throw on it, and it also requires the longer 7afe rods. many will say that you need to use a different sent of rods if you want to increase power, but actually the weaker point of the rods is the bolts.

none of their information was wrong that I can see... the guy was asking weather or not he could use 4age crank/rods/pistons in a 7afe and they said only pistons make sense...

How is that wrong?

[dethpool]

Thanks Bros for the Info,I'm new to all this and just want to have my 7afe that walks well and shut his big mouth to my brother and his honda acura integra, and the mr2 parts one bro give me de parts of his work very cheaps.

[toyotaspeed90]

Originally Posted by eage8

none of their information was wrong that I can see... the guy was asking weather or not he could use 4age crank/rods/pistons in a 7afe and they said only pistons make sense...

How is that wrong?

I read it wrong

that being said, without being specific it's still wrong

depends on the year. You can't use early 18mm wrist pin 4age pistons (which 85/86 mr2's had) in a 7a.

[Donald]

Originally Posted by dethpool

Thanks Bros for the Info,I'm new to all this and just want to have my 7afe that walks well and shut his big mouth to my brother and his honda acura integra, and the mr2 parts one bro give me de parts of his work very cheaps.

The 4A-GE pistons will work in the 7A-FE.
I actually have those in my 7A-FE, and I believe (not sure) that it bumps the compression up a bit, not much, but I used a 4A-FE head gasket to make sure that it remains a non-interference engine.
With the 7A-FE gasket, the valves would clear the piston if everything was timed right, but if the timing belt skipped or broke, the valves will make contact with the pistons. That is why I used the 4A-FE head gasket.

If this was not my daily driver, I would just use the 7A head gasket, and that would give a bit more compression.

I reccommend the Weisco pistons because they can make them to whatever compression ratio you want, and they will be the right shape to clear the valves. I plan on doing that to my 7A some time in the future.

I do not think that just bumping up the compression of the 7A will make it an Integra killer.
For that, I would say do an engine swap like I mentioned before. Even then, it still might not beat the Integra. You could just go turbo.

[dethpool]

YEs I have realy work to do and a lot of mone to spend I guess,
but I love my 7AFE rola and Im gona worked on it

[dethpool]

tanto de que usted debe saber mejor. No quiero oír cómo no me gusta y que estoy de ser sólo un culo. Su información es incorrecta.

Si desea utilizar la 7a entonces usted puede hacer un simple 7age construir. Se trata por lo general con algunos 7afe y algunas partes 4AGE. Una de las opciones mejor y más fácil es:

7afe bloque, cigüeñal, las barras
4AGE smallport pistones de alta competición (el bulones 7 son 20 mm y el 7 es el idénticas dio a luz a la 4a) y los anillos
4AGE smallport cabeza

(Que es el corto de la misma).

Si lo que desea es utilizar un 7afe y hacer un poco más de compresión a continuación, utilice un conjunto de 4afe pistones. Ellos no son lo mismo y te aumento de la compresión. Las piezas son fáciles de encontrar.

el 7 es un 1.8L .... mismo diámetro, por lo que la carrera es más larga. Esto se logra con la 7afe manivela que tiene un tiro largo en él, y también requiere de las barras ya 7afe. muchos dirán que es necesario utilizar otro enviado de las barras si se quiere aumentar la potencia, pero en realidad el punto más débil de las barras es de los pernos

those parts which are of black or silver top 4AGE