1.8l Pistons
#1
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i know there is a few topic on the subjet but my question is a bit different and i didn't wanted to highjack anyone topic :S
so having 1.8L piston in a 2.0L would raised compression at about 11:1 .....
the thing i was wondering with that kind of CR ratio what fuel would i have to use would 89octane regular still be enough or would i need supreme at 91 octane ?
so having 1.8L piston in a 2.0L would raised compression at about 11:1 .....
the thing i was wondering with that kind of CR ratio what fuel would i have to use would 89octane regular still be enough or would i need supreme at 91 octane ?
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I had the same question!
We run 95 unleaded in South Africa, so I asked two mechanics from different shops
The one guy says ideal compression ratio for 95 is 10.5:1 to 10.8:1
The other guy who isn't out for my money says ideal up to 11.2 and 11.8 maximum for 95
Im sure a google search or call to a decent shop could get you an answer quick enough
Let us know what you find
We run 95 unleaded in South Africa, so I asked two mechanics from different shops
The one guy says ideal compression ratio for 95 is 10.5:1 to 10.8:1
The other guy who isn't out for my money says ideal up to 11.2 and 11.8 maximum for 95
Im sure a google search or call to a decent shop could get you an answer quick enough
Let us know what you find
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^^ If you run 1.8lrods will lower the compresion not the pistions for turbo app. BUT if you use 1.8 rods and pistions in a 2.0L block you can boost up to 25psi and they will hold..
for N/A sets up i suggest to use the following
bore the block 1mm over
use 1.8 pistions and 2.0 rods
Airram intake
272 int/Ext cams
shaved the head 0.07mm "if you want" this will up the comp more buy 0.8 to 1 point
XD head gasket "metal type"
BBTB and headers and 65~68mm catback
That was my old set up..
make sure you check all clearances.. to include the pistions
for N/A sets up i suggest to use the following
bore the block 1mm over
use 1.8 pistions and 2.0 rods
Airram intake
272 int/Ext cams
shaved the head 0.07mm "if you want" this will up the comp more buy 0.8 to 1 point
XD head gasket "metal type"
BBTB and headers and 65~68mm catback
That was my old set up..
make sure you check all clearances.. to include the pistions
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I'm gonna stay on topic here, and just sift through the many duplicated topics to post my loads of questions!
Thanks for your specs Mad_John.. but what fuel did you have to use with that?
What sort of power were you pushing?
I was aiming for 11.8:1 with the pistons and head shave, I wonder if that would be safe with 95 octane lead replacement petrol?
Thanks for your specs Mad_John.. but what fuel did you have to use with that?
What sort of power were you pushing?
I was aiming for 11.8:1 with the pistons and head shave, I wonder if that would be safe with 95 octane lead replacement petrol?
#7
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i was running mogas aka cheap ass army fuel, it ran ok but any thing 92 and above is better noticed a smoother ideal
what you want to do is fine i dont see any problems
what you want to do is fine i dont see any problems
#8
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so having the 1.8L piston i would have to use prenium wich over here is 91-92 .....
what kind of power where you gettin out of that set-up mad john ?
it about the exact set-up that i want.... i want to stay N/A and single TB since it's a daily driver
what kind of power where you gettin out of that set-up mad john ?
it about the exact set-up that i want.... i want to stay N/A and single TB since it's a daily driver
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I am going the N/A route right now john, but I don't want to pull the block and do the 1.8L pistons, too much work and money. I will do that when I go turbo. My question is, is the beta 2 head gasket thinner than the beta 1? I measured my beta 1 and got .029".
And is it safe to mill the head .070"?
The machine shop I am at says he will need to take off about .004-.010", but I would like to raise compression to about 11:1. So it would be ok do take off say .040" even with my oversized valves +1mm?
Thanks.
And is it safe to mill the head .070"?
The machine shop I am at says he will need to take off about .004-.010", but I would like to raise compression to about 11:1. So it would be ok do take off say .040" even with my oversized valves +1mm?
Thanks.
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^^ you dont gotta pull the block to do pistons mang
pull the oil pan
unbolt the 8 bolts for the caps
drop the piston and rod combo
take it to a machine shop have them heat it out and install the pistons(your lookin probably about 40 bux hell they probably will install the rings too)
reinstall
seriously you could do it in a weekend with a lift and some tools (torque wrench to measure the rod bolts) and whatever you dont have autozone will probably have
pull the oil pan
unbolt the 8 bolts for the caps
drop the piston and rod combo
take it to a machine shop have them heat it out and install the pistons(your lookin probably about 40 bux hell they probably will install the rings too)
reinstall
seriously you could do it in a weekend with a lift and some tools (torque wrench to measure the rod bolts) and whatever you dont have autozone will probably have