7afe internals, sumthing a lil new Options

[playr158]

7A block with F head:
1.8 liters (1,762cc)
105hp (SAE net) @ 5,200 rpm
117 lb-ft torque (SAE net) @ 2,800 rpm
Bore = 81.0mm
Stroke = 85.5mm
CR = 9.5:1


7AFE / 4AGE
rod length=.......................132.5 / 122
crank throw=.....................42.75 / 38.5
stroke=..............................85.5 / 77
Difference in compression height =14.75mm

Toyota 4AGE 1.6L DOHC 88-92 MR2
Stock Bore: 3.189, 81 mm | Stroke: 3.031 | Rod Length: 4.804 | Head cc: 39.0 | Gasket: .028 | Deck: .005

ARIAS pistons 4ag(z)e=
Bore in/mm: 3.209 / 81.50
Cr Height: 1.190
Dome CC: 7.5
Cr Ratio w/G head: 10.7
Gram Wt: 288
prt #= 3730300
ring kit prt # =1012283209

Pauter RODS-4a motor
.787” ----------------------pin diam
1.772” --------------------BE bore
4.800”---------------------length
.856” ---------------------BE width
460g ----------------------weight
TOY-200-450-1220F -----prt #

Stock 4AGZE pistons in 7A block will give you 10.8 CR (Edo got 11.06 cuz of the Bigger bore), so then using 1.5 mm head gasked you will get the CR between 9.5-9.6 and using 2mm head gasket will get you at 9-9.1 CR.
you have three options on aftermarket rods ARGO, PUATER, OR CUSTOM 700+ at min



This post has been edited by playr158: Apr 7, 2005 - 10:18 AM

[doGGy]

You can use 82 mm bore on your 81 head... 1 mm gap is practicly nothing, cuz you have to counth that the gap will be smaller then the headgasked will be pressured between block and head. It is way worse then you get the head gasket to stick in combusion chamber, then you get detonations and etc...

As for pistons... If you gonna go with head swap - then youo can go with high $ pistons, but as for 7AFTE..... i dotn see a point in going with somthing more, get the GZE stock pistons, they will cost you 120-200$ and they are forged from factory, so you woun t have any problems.. Invest better in Pauter rods insted in overpriced pistons and 2 mm head gasket this will give you safe boost and higher boost.

[Hanyo]

make a high compressoin 7afe..

[nik]

make a high compressoin 7afe..
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why high compression when you get 2 times the power turbo for almost the some money

[playr158]

mmk doggy thanks
so best way for a pre boost setup would be

stock 4agze pistons
2mm headgasket (82mm bore doesn't matter)
and better rods (obviusly lol)

[nik]

mmk doggy thanks
so best way for a pre boost setup would be

stock 4agze pistons
2mm headgasket (82mm bore doesn't matter)
and better rods (obviusly lol)
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i have 3 stock 4agze pistons 8.9:1 if your interested

i just bought new 8.0:1 pistons




This post has been edited by nik: Apr 5, 2005 - 11:12 AM

[playr158]

NIK i need four you dork

[nik]

NIK i need four you dork
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the forth one is all scared and chip on the bottom only 3 are good you retard

[playr158]

yea i know your loser

thats why i'm goin to look for new pistons
cause even if i take pistons from a used motor
i'll still need new rings and might as well just save up for the package deal and support dustin!

oh and for the 4age head on a 7afe
can i do it NA?.

do for the hell of asking
when i do go 7afte...or rare option of 7agte
can i go SIDEmount INtercooler?
i'm really thinking about this since i have the invader front which a nice fat fmic would be hot but i think if i slid the intercooler (more square shape to it) on the inside of the driver side fender?

This post has been edited by playr158: Apr 5, 2005 - 1:42 PM

[nik]

yea i know your loser 

thats why i'm goin to look for new pistons
cause even if i take pistons from a used motor
i'll still need new rings and might as well just save up for the package deal and support dustin!

oh and for the 4age head on a 7afe
can i do it NA?.

do for the hell of asking
when i do go 7afte...or rare option of 7agte
can i go SIDEmount INtercooler?
i'm really thinking about this since i have the invader front which a nice fat fmic would be hot but i think if i slid the intercooler (more square shape to it) on the inside of the driver side fender?
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i'll answer in order

yes i'm a winner ok maybe not

i would buy new also but if your on a budget used ones are ok

yes you can build a 7age with tvis look on club4ag.com for more info

yes you can go side mount just get a good one

i like the look of a fatty FMIC

This post has been edited by nik: Apr 5, 2005 - 2:39 PM

[playr158]

mmk
are all 4age heads TVIS?
cause then all i would need to do is
use the ecu and wiring harness and the rest should bolt up?

[nik]

mmk
are all 4age heads TVIS?
cause then all i would need to do is
use the ecu and wiring harness and the rest should bolt up?
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yes there are non tvis 4age heads

yeah if you get a full harness with ecu and head your 70% closer to a 7age

This post has been edited by nik: Apr 5, 2005 - 2:40 PM

[playr158]

aite thanks to DUSTIN

i'm looking at 4agze pistons (je or arais)
with rings
a cometic head gasket
and now i'm thinking about what to do with rods?
shot peen?
or how should i go about those?

oh block i'm goin to hunt down at the junk yard monday
so thats all gravy woot 35$ for it
oh and i'm goin to stick to a solid 7afte
no motor hybrid for me i've decided to keep the original motor goin!

This post has been edited by playr158: Apr 6, 2005 - 12:08 AM

[nik]

aite thanks to DUSTIN

i'm looking at 4agze pistons (je or arais)
with rings
a cometic head gasket
and now i'm thinking about what to do with rods?
shot peen?
or how should i go about those?

oh block i'm goin to hunt down at the junk yard monday
so thats all gravy woot 35$ for it
oh and i'm goin to stick to a solid 7afte
no motor hybrid for me i've decided to keep the original motor goin!
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who is dustin?

i just saw a set of 8.0:1 OEM new 4agze pistons with rings on club4ag
you have three options on aftermarket rods ARGO, PUATER, OR CUSTOM 700+ at min
i just tore apart my spare block and had a look at the 7afe rods and i would replace them they are thin

if your staying 7afte on the head get better valves and springs
also if you want my spare head pm me
what you have so far for your turbo stuff?

[S_C_M]

Imo, you will need to calculate the CR for a 7AF with 4A pistons, or any 7AG. Deck heights are quite a bit different from that of a 4AG, as is the chamber volume of the 7A head, if you're using that.

Just a quick thing I'm sure most have already thought about, but I figured I'd throw it in for anyone who might need it.

*edit* I remember a few years back that Crower had some 7A rods in stock for around $650. Another option that may still be available.

This post has been edited by S_C_M: Apr 6, 2005 - 10:18 PM

[playr158]

the CR on a 7a head with 4agze pistons will increase although the pistons are low cr

thats why a 2mm headgaket is needed
to create a closer to stock cr

[edo17982]

I'm using 4age pistons, bore 82mm and they were rated 8.9 CR and once work were finished I got a static CR of 11.06! do your math....

[doGGy]

Stock 4AGZE pistons in 7A block will give you 10.8 CR (Edo got 11.06 cuz of the Bigger bore), so then using 1.5 mm head gasked you will get the CR between 9.5-9.6 and using 2mm head gasket will get you at 9-9.1 CR.

[nik]

Stock 4AGZE pistons in 7A block will give you 10.8 CR (Edo got 11.06 cuz of the Bigger bore), so then using 1.5 mm head gasked you will get the CR between 9.5-9.6 and using 2mm head gasket will get you at 9-9.1 CR.
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ok this is a little off topic but I’m getting to the point where I’m going to start reassemble now you know doggy 4agze head and pistons 8.0:1 can I just the stock height gasket and will my comp change?

[doGGy]

i was just tryint to find this info my self too.. i dont know about the CR with the Gze piostons and GE head.. Need to do a research on Club4AG there was few topics there i go the info about CR..




By the way, if some one could recalculate the CR for 7A with GZE pistons, here are the info:

Bore 81
Stroke 85.5

Cumbusion chamber volume - 36 cc (head)
Dished piston volume 10 cc

7A pistons are dished, as 4AGZE pistons are almost flat...

Stock 4AGZE pistons in 7A block will give you 10.8 CR (Edo got 11.06 cuz of the Bigger bore), so then using 1.5 mm head gasked you will get the CR between 9.5-9.6 and using 2mm head gasket will get you at 9-9.1 CR.
[right][snapback]267689[/snapback][/right]

ok this is a little off topic but I’m getting to the point where I’m going to start reassemble now you know doggy 4agze head and pistons 8.0:1 can I just the stock height gasket and will my comp change?
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