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Old 01-28-2010, 09:02 PM   #1 (permalink)
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H22 Questions, ATTS/Auto, etc.

I own a 97 Prelude

What is the benefit of going JDM instead of USDM?

Is everything mounted the same? (Power steering pump, belts, alternator, etc)

Also, what is really needed to convert from Auto to Manual? Does it involve changing the blocks themselves or just installing an ATTS ?

The reason I am asking is because I'm swapping my engine with a custom built H22 engine and I'm not sure if I want to go JDM/USDM or keep Auto/go Manual.

Any advice would be extremely beneficial and I appreciate any of it ahead of time!

Thanks!
Austin
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Old 01-28-2010, 09:16 PM   #2 (permalink)
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In no particular order:

to change from auto to manual you need to have correct blocks/trannies. to have atts you must use an sh block. to have a regular trans you can use a base block or an sh block but the sh block would require fabbing up adaptor plates, buying an axle etc.. chances are, your custom h22 is a base block so you would need a base trans. i would recommend using an lsd trans especially since its a built engine. many members on PO will tell you to stay away from the ss auto tranny bc of their high and almost guaranteed failure rate.ac alt and ps are mounted the same i believe. the benefit of JDM h22 is about 20 more hp. there is also one more thing you should consider, using the search function.

anyone should feel free to make corrections because im not the h22 professor

Last edited by dontbuyprelude; 01-28-2010 at 09:19 PM. Reason: additional info
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Old 01-28-2010, 10:27 PM   #3 (permalink)
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Rompirate has a great write-up.

A while back, I tried compiling a thread that listed every thread that had valuable 5-spd swap info, whether it be a full write-up, or just good random info....however, I have mentally lost track of it. I'll spend a week lookin' for it. It was on another Prelude forum I'm on.......it's gotta be here somewhere...:searches-through-junk:
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Old 01-29-2010, 01:26 PM   #4 (permalink)
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Simply sell the car and buy one with a manual transmission. It is THE MOST COST EFFECTIVE method of owning a 5spd Prelude.
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Old 01-29-2010, 07:58 PM   #5 (permalink)
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Simply sell the car and buy one with a manual transmission. It is THE MOST COST EFFECTIVE method of owning a 5spd Prelude.
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Old 01-29-2010, 10:12 PM   #6 (permalink)
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I understand your point, however I bought this 97 prelude for $800.. has PERFECT interior and a decently running engine right. Minus the clogged injectors... I'd rather convert to JDM and keep the Auto trans if it's that much work.
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Old 01-29-2010, 10:25 PM   #7 (permalink)
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I understand your point, however I bought this 97 prelude for $800.. has PERFECT interior and a decently running engine right. Minus the clogged injectors... I'd rather convert to JDM and keep the Auto trans if it's that much work.
well, in that case either sell for its true value, or yes, conversion might be fine. I think depending on shop labor, usually costs between $2-3gs with parts/labor
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Old 01-30-2010, 06:10 PM   #8 (permalink)
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yeah, that sounds like a good idea. How can I tell if my car is a base or SH?
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Old 01-30-2010, 07:58 PM   #9 (permalink)
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If it's an auto, then it's a base.
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Old 01-31-2010, 01:03 AM   #10 (permalink)
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Alright,so from what I'm gathering.. a SH block has ATTS for manual transmission. Base is always Auto.

Is there a way to drop a JDM SH block into a car and hook it up to an automatic transmission?

Thanks,
Austin
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Old 01-31-2010, 06:56 AM   #11 (permalink)
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Base is always Auto.
No, but an SH is always a manual.
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Old 01-31-2010, 09:54 PM   #12 (permalink)
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Originally Posted by ajorden88 View Post
Alright,so from what I'm gathering.. a SH block has ATTS for manual transmission. Base is always Auto.

Is there a way to drop a JDM SH block into a car and hook it up to an automatic transmission?

Thanks,
Austin
just to clarify USDM got 2 models of preludes:
Base model: can be auto or manual
and SH model: always manual, came with an atts unit (also found in the type-s prelude(type-s is jdm))

search: "atts" and "sh model" in this website and read about it to understand.

Heres some info (please read):
Honda Prelude - Wikipedia, the free encyclopedia

Last edited by rpwolf; 01-31-2010 at 09:57 PM.
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Old 01-31-2010, 11:51 PM   #13 (permalink)
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Originally Posted by rpwolf View Post
just to clarify USDM got 2 models of preludes:
Base model: can be auto or manual
and SH model: always manual, came with an atts unit (also found in the type-s prelude(type-s is jdm))

search: "atts" and "sh model" in this website and read about it to understand.

Heres some info (please read):
Honda Prelude - Wikipedia, the free encyclopedia
perfect, thanks guys! I really appreciate this information. I'll go out and do some more research.
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Old 02-01-2010, 12:38 AM   #14 (permalink)
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Originally Posted by dontbuyprelude View Post
In no particular order:

to change from auto to manual you need to have correct blocks/trannies. to have atts you must use an sh block. to have a regular trans you can use a base block or an sh block but the sh block would require fabbing up adaptor plates, buying an axle etc.. chances are, your custom h22 is a base block so you would need a base trans. i would recommend using an lsd trans especially since its a built engine. many members on PO will tell you to stay away from the ss auto tranny bc of their high and almost guaranteed failure rate.ac alt and ps are mounted the same i believe. the benefit of JDM h22 is about 20 more hp. there is also one more thing you should consider, using the search function.

anyone should feel free to make corrections because im not the h22 professor
What I'm gathering is.. if I buy a JDM H22 block.. customize it how I see fit, yada yada yada... I can keep my base Auto Trans for the mean time and swap in a LSD trans in the future if I'm still wanting to go manual after the engine swap?

Thanks,
Austin
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Old 02-01-2010, 01:40 AM   #15 (permalink)
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Quote:
Originally Posted by ajorden88 View Post
What I'm gathering is.. if I buy a JDM H22 block.. customize it how I see fit, yada yada yada... I can keep my base Auto Trans for the mean time and swap in a LSD trans in the future if I'm still wanting to go manual after the engine swap?

Thanks,
Austin
only if the jdm h22 is non type s. but why would you even want an auto on a built block. with the additional power its going to fail in a short time. just do it right and get a manual tranny.
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