Ok, check this out. I have a 93 VTEC Prelude H22A1, I am buying a 97 H22A4 to put into my car. The 97 it came out of had ATTS. If I am not mistaken the ATTS is part of the tranny. Well, I was looking to use my existing tranny for this swap. I know this is an ODB II vehicle, but I will have the harness to convert to a ODB I. What other issues am I looking at? Basically are there any problems with this swap? Anything I should look out for. Will the ATTS thing matter? Hook me up with some info because I need it!

gsr*lude

 

wow a 97 lude motor? you didnt say h22a1 so is it jap spec? if it is find an engine code book and run the serial# see if it is the type-s motor. My friend put a 97 motor into his 4thgen and found out it put out 220hp and that it was the type-s motor. oh yeah, the atts is automatic torque transfer system. it is suppose to help the handling odf the car. check this out....http://asia.vtec.net/beystock/honda/preludes/


[Modified by 4thgenturboSi, 3:22 AM 9/20/2001]

 

why would you want to DOWNGRADE?

 

Well JG, I was hoping to hear from you on this, you post ***** you! J/J But really I got a deal I couldn't pass on a completely built H22A out of a 97. Sleeved, the whole nine. So, I was just going to throw it in and boost the **** out of it. Well, with my Hondata reprogram that is. I was just going to sell my H22A1 after the swap. So, I just wanted to know what problems, if any, to expect with this swap. The ATTS thing was kinda bugging me too. I have no experience with that. I don't really consider it a downgrade. It is built from the bottom up, and it is still a VTEC!

gsr*lude

 

I don't think the 97 is a JDM engine. I will check it and let you know. But I don't think it would matter too much, the CR has been changed to 9:1 anyway. I know the cams might be different, I have read soooo many posts on that, so I am not going to even go there!

gsr*lude

 

Prelude SH motors are kind of odd. Jeff at Atomic Performance has said something to the effect that NON-SH transmissions don't fit them. You might want to email him about it just to be safe.

 

I have no idea, but I think you'll run into problems. The ATTS motor does have some structural differences from the non-ATTS motor, so I don't know if your regular tranny will bolt right up to the new motor.
What is the engine code on the SH ATTS motors anyways? Still an H22A4? I can't believe it has the same engine code 'cause the motors are a bit different.

 

hum, i just thought the tranny housing was different, I very highly doubt that the blocks are different

 

Well, the oil filter is in a different place.

 

I thought that was moved to make room for the ATTS unit. And I thought that inturn was located on the tranny itself, but I could be worng, and that is why I want to make sure.

Anyone with an email contact to Atomic? I went to their website and they said not to call for any technical advice. I understand, they have a business to run, but I need knowledge!


[Modified by gsr*lude, 11:44 AM 9/20/2001]

 

The blocks are slightly different to accomidate for the ATTS unit, as mentioned. Talk to 98turbosh on hp.com or go read his posts there about swapping the base tranny in for the SH. Everything bolts up fine according to him but there were some added things that needed done.

Gabe


[Modified by Gabe, 9:05 AM 9/20/2001]

 

I have a 97 SH engine and a Si tranny and it bolted on to my 90 Accord with no problems. I just got the call today they engine cranked up fine with no problems they are now bleeding the clutch. You have to have a Prelude SH body to have the ATTS to function properly since there are sensors on the SH body. You can bolt on any H series tranny to that SH engine just like I did. You will need the distributor, injectors, and ECU off your 93 H22 to convert the engine to OBD1. I will post pics when the car is done but I rather wait till I get my 97+ 3 inch diameter AEM CAI in.

 

HEY! I need a 3" diameter intake for my 4th gen Accord H22A4 too. Which intake will you be using? The 5th gen Prelude AEM CAI doesn't look like it'll fit. Will it bolt in without any modifications? Thanks.

 

I'll let you know when I get it in. I'm sure I have to use an air saw to make the hole(next to the battery) bigger for the 3 inch piping. I've seen many 4th gens(2.75 inch 2 peice) with 5th gen(3 inch one peice) CAI. Some stores don't care and just send them 5th intakes anyways.

 

I have my 3" CAI from my 4yh gen I am selling for $75+SH.