Thread: Need Insight

Bought a SR20det engine and saw 53J 4R on the head and 78E on the block. Did some check and saw that that code on the head is from a 10:1 compression engine. Just wanted to know if the head being that its for a high compression engine, what kind of compression am i looking at. 78E engine suppose to be is 8.5:1. Will the compression change because of the head?

Thanks

Run a compression test on it

Only if the chamber size is different I believe. Ill try to find some numbers

Here is what I have found so far. Technical Questions (SR20DE Specs)

Technical Questions (SR20DE Specs) - SR20 Forum

Hi guys!

Now I do know that the SR20DET GTI-R Specs are the following:
Compression Ratio: 8.3:1
Combustion chamber: 46.1 cc
Stock Head Gasket: 1.2 mm
Deck Height: 0.5 mm
Piston Dish Volume: 15 cc

I also know that the S13 SR20DET has the following specs:
Compression Ratio: 8.5:1
Combustion chamber: 45 cc
Stock Head Gasket: 1.1 mm
Deck Height: 0.5 mm
Piston Dish Volume: 15 cc

But what are the specs of the Bluebird SR20DET and B13 SR20DE?

Bluebird:
Compression Ratio: 8.5:1 ??
Combustion chamber: 45 cc ??
Stock Head Gasket: 1.1 mm ??
Deck Height: 0.5 mm ??
Piston Dish Volume: 15 cc ??

B13 SR20DE:
Compression Ratio: 9.5:1
Combustion chamber: 45 cc ??
Stock Head Gasket: 1.1 mm ??
Deck Height: 0.5 mm ??
Piston Dish Volume: ??