Hi everybody,
I just recently purchased a new engine for a current project Im working on. I want to swap a Japanese Prelude Type-S (H22A) into a 1997 Civic. I am aware that because of the ATTS I will not be using this transmission since it does not fit (with the module) into my engine bay. Instead I will be using a regular LSD transmission from a 1997 H22A. My concern is finding out if this is a REAL Type-S engine. It has a red valve cover and the ECU code matches to the Type-S but the intake manifold is what concerns me most. Did the Type-S come with a dual stage manifold like the regular H22 (IAB valve) or did it have a single stage only with shorter runners like an Integra Type-R? I have not yet checked the exact measurement of the throddle body but I know it should be 62mm instead of 60mm on the regular H22's. Can you tell me anything else so that I can determine if this is a real Type-S? What is the difference between the Prelude Type-S and the Prelude SIR? Someone told me I might have the Prelude SIR...

 

should be stamped with "p5p" the ecu should be the same as well as head stampings and block stamping

type s had dual stage intake mani much like the h22


the euro r had the single stage

 

Thank you for that, I didnt know about the Euro spec fact, very useful to know. The p5p is found on ecu, but are u saying the head and blcok should have p5p stamped as well?

Any other input of course always greatly appreaciated so feel free to add pleaseeee, thanks!

Also what are the Spec's for the Prelude SIR?

 

pretty sure the sir is 200 bhut had optional lsd

and yes you should see a p5p stamp on the head..and block behinde the exaust manifold on the left hand side of it