4th or 5th gen? - Honda Prelude Forum

Prelude3885 · 10-14-2001, 01:33 AM

are the fourth and fifth gen vtec engines the same?
if not, when i drop in my new engine will it be the 4th or 5th gen engine?

jpprelude · 10-14-2001, 01:41 AM

They are different. H22A1, and H22A4. I think 4th gens had closed decks, and 5th gens had open deck. That and OBDI and OBDII, 1995 and up are OBDII.

I'm tired, so please correct me.

jpprelude · 10-14-2001, 01:42 AM

What year is your car?
1993-1995 VTEC, it will be easier to get a OBDI

VeeTec · 10-14-2001, 06:57 AM

Quote:

Originally posted by jpprelude
They are different. H22A1, and H22A4. I think 4th gens had closed decks, and 5th gens had open deck. That and OBDI and OBDII, 1995 and up are OBDII.

I'm tired, so please correct me.

Ok, the early H22A1's were open deck, the H22A4's are closed deck.

OBDII started in 96. The 93-95's were OBDI.

jpprelude · 10-14-2001, 11:00 AM

Quote:

Originally posted by VeeTec

Ok, the early H22A1's were open deck, the H22A4's are closed deck.

OBDII started in 96. The 93-95's were OBDI.

Thanks Warren, told you I was tired.

Damn, I typed that

Prelude3885 · 10-14-2001, 12:46 PM

what's OBDI and open/closed deck?

sorry if i sound stupid

Prelude3885 · 10-14-2001, 12:47 PM

what is OBDI and open/closed deck?
sorry if i sound stupid...

10-14-2001, 04:44 PM

the 93-95 are closed deck and the 96 and later cars are open deck.

open deck is: the blocks that have the floating piston bores and then you go out and waste 110 dollars to put a plate in there that doesn't help unless you are building a pure race motor or you have a turbo running over 20 pounds of boost.

10-14-2001, 04:47 PM

OBDI: On Board Diagnostics series 1--less emissions equipment, lower standard, and easier to modify the engine without the computer flipping out on you. AKA: much better than OBDII

illusion · 10-14-2001, 05:28 PM

Quote:

Originally posted by feprelude
the 93-95 are closed deck and the 96 and later cars are open deck.

yeah i was gonna say that veetec had it backwards :P

Knight Rider · 10-14-2001, 06:34 PM

4th gen stock preludes are the FASTEST!

jpprelude · 10-14-2001, 07:40 PM

Quote:

Originally posted by illusion

yeah i was gonna say that veetec had it backwards :P

So I wasn't wrong?

starscream · 10-14-2001, 07:41 PM

Quote:

Originally posted by jpprelude

So I wasn't wrong?

you are CORRECT sir... har har har

VeeTec · 10-14-2001, 11:44 PM

Quote:

Originally posted by deceptakon

you are CORRECT sir... har har har

Yes I had it backwards....

I knew the answer but got mixed up.

Guess I'm not perfect after all....

aklucsarits · 10-15-2001, 11:05 AM

Also, 4th gen H22a had peak and hold fuel injectors while the 5th gen H22a has saturated injectors. Several engine sensors are also in different locations. For example, on the 5th gen, the crank position sensor is near the crank while on the 4th gen it's in the distributor housing.

Andrew

grlielude · 10-15-2001, 11:15 AM

I have a fourth gen and I thought that my engine was OBDI H23?
or was I all confused and got that wrong
its an si so its non v-tec.....
By the way is it harder to turbo a DOHC than a SOHC?
I have a lot of other questions too...I'll post them when I get some more money for my baby

jpprelude · 10-15-2001, 11:46 AM

Quote:

Originally posted by grlielude
I have a fourth gen and I thought that my engine was OBDI H23?

depends on the year. if you have a 1996, then OBDII

grlielude · 10-16-2001, 07:33 PM

its a 94

10-16-2001, 09:15 PM

Actually Aklucsarits the crank sensor is by the crank and the cylinder position sensor is in the distributor.