Thread: sr18vet - sr16 or sr20 crank based?

a SR18DE head and SR20DE head are not even clsoe to being tge same. SR18DE head has smaller combustion chamber and much smaller valves because of the smaller bore.

ok. the sr16ve crank.
modified Eagle rod from a 95+ Chevy Cavalier Quad 4
can I use my sr20det 86.5mm cp pistons? the resulting cr will be around 8.2. do I have to make valve notches?

Andreas. I have read your thread on the sr20forum : "My thoughts about a sr16vet"
I have found a lot of helpful info.

But still there are few questions:
1. Can I use my 8.5 cr sr20det pistons with extra valve notches?
2. I already have a new gt3076r. a/r64. will it be fine?
3. If I rev to 10k, what oil pressure will I get? (rnn14).
4. Do I have to use the electric water pump?

I think you have two options. Ditch the pistons you have.

1. Do it cheap, Buy an sr18 and throw better rods and pistons in it.

2. Do it right, sleeve a sr20 block and go with 90mm plus bore along with sr16 crank. This motor will have an awesome rs ratio and it will flow much better then the sr18.

so you would need the following..

sr16ve crank.
modified Eagle rod from a 95+ Chevy Cavalier Quad 4
CP92mm pistons made to what CR you want
Mazworx HG


and youll have a build high reving 1.8 SR engine..

The first option you mentioned was also my reccomendation.

It can be had very cheap, through in det rods and aft pistons and ur done.

From what ive seen from the one at the shop the sr18 should flow pretty decently. Maybe do a minor port match and debur.

Alot of the power and response will depend on the compression of the motor and the turbo will be ran.

Stratton.

make closer to 9:1 compression. no reason not to if you have good fuel

this year I dont have enough funds to make 92mm bore. I have the 86.5mm det pistons.
can I make valve notches and use then into a sr16vet?

Few posts earlier Andreas have told that the sr18 + ve head is impossible.

I plan to use my nib gt3076r .63ar
the planned cr is 9:1 or the 8,5:1 at least.

cant calculate the cr if i use my det pistons in the sr16ve. it is about 7.5 or so. I have read some threads about cr and think that tht 7.5 is a true result, because the sr16ve pistons are 11 and in the sr20 they are 12.5.

SR16VE Pistons are about 13.5-1 in a VE and 12-1 in a DE

SR20VE 20V pistons which are 11-1 in a 2L VE will be about 8.5-1 in a SR16VE.


To get the 8.5 to 9.0-1 compression piston for the SR16VE the piston will need to be a flat top piston with valve notches about the size of redula VE valve notches.