tuning 94-95 berettas

[JeffD]

Hey guys, I've been looking for another beretta for a while now and can't find any decent bodied cars that are 1993 and under.
I'm thinking that I should just get a 94 or 95 for the SFI and younger body.
But I'm going to drop in a 3400 when I get one, so It would need to be tuned, so whats needed to do that? I have all the stuff for tuning OBDI, what else is needed? I've been told that these cars are essentially OBD1.5, is that true?
thank in advance!

[1988GTU]

What I would do is either swap your current pre 93 harness in to the newer car (which you will no longer have SFI) or swap to obd2 by using a 96 harness and it will keep the SFI.  94 and 95 is currently not able to be tuned and I don't see anyone coming up with an idea anytime soon.

[JeffD]

Hmmm, I guess your right. what do you need to tune OBDII then? I might just stick to OBDI if it gets pricey though.

[1988GTU]

DHP was the only thing I remember last that people were using, but DHP is no longer available so .... yeah you might be stuck using obd1 again.

[JeffD]

DHP? What is that? It makes me curious even though I'm leaning towards OBDI since my friend has a 1996 Beretta.

[1988GTU]

DHP power tuner.  Try googling it, there will be a few forums about it.

[Asylum]

If you revert back to OBD 1 (as opposed to your current OBD 1.5) It is somewhat tunable with a few systems that are available.

I have a couple of custom chips for mine, and I'm getting ready to start researching another for the upgrades I'm doing.

As far as MPFI and SFI are concerned, EVERYTHING is MPFI after 2500 RPM. The computer just can't keep up.

Check out Moates Tuners (just Google it) Thay have some pretty good OBD-1 stuff, non of which I personally understand, but Rodney "3400Beretta" on B'Stuff, is pretty good with this stuff, and has been really helpful to me.

Having said all that crap, if you can get an OBD 2, and want to spend the time and money, it is much more tunable.

Most of the info is on B'Stuff if you search.

[Cliff8928]

(1988GTU @ Mar. 19 2008,17:32)QUOTEDHP was the only thing I remember last that people were using, but DHP is no longer available so .... yeah you might be stuck using obd1 again.
HP Tuners

http://www.hputners.com/

[1988GTU]

There is talk about them, I didn't want to say much about there services until it's official.  IIRC Right now they don't support the L body platform or something to make it difficult.
http://www.hptuners.com/products/vcmsuite_vehicles.php
http://www.hptuners.com/forum....beretta
http://www.hptuners.com/forum....beretta

[JeffD]

I have a willem Eprom burner and tunerpro RT for tuning OBDI.
I've also seen Moates's stuff, that stuff is great but I think I'll stick with what I have. all I need to do Is get my datalogging working.
I think that you guys sealed the OBDI deal for me.
as far as swapping the harnesses, all the places where the harness goes through the fire wall and other places should be the same right?

[3X00-Modified]

That second HP tuner thread is one I started to see if they would support the 97 Venture ECM that I know works on a 96 Beretta wiring harness and engine setup. Apparently they have support for a 97 Pontiac Montana which should be the same as the Chevy Venture, but I was never able to verify that since DHP doesn’t have a Montana mapped file so I couldn’t flash my 97 ECM with it to see if it would run the car.  I’m sure it would since those two models should be exactly the same wiring and engine wise.

Now going to obdi, been there tried that… with a 4t60e in there it’s impossible unless you plan on swapping transmissions.  You need either an A-body ecm or a piggy back system, I tried both and failed… I think it was because I was trying to adapt the emc’s to my harness and I really should have used a whole donor harness… BUT since DHP supported the Beretta when I did it why swap an entire harness for something older when I could go the other way and get better support for my setup.

I pulled a 96 Beretta harness and then found out what had to be done to make that work with my 95 interior one, a few wire changes here and there and I was ready to go, dropped it in and blammo, OBDII 95 Beretta.  I then later upgrade the ECM to  97 venture one since they are plug and play and DHP had many more tables to play with in that ecm.
I didn’t have 500 to drop on a HP tuner otherwise I would have tested the Montana setup to see if the Beretta crowd had a supporting place to go… Bottom line is if the Montana ECM file is the same as the Venture then you could buy the tuner to support the Montana, get a Montana ecm, plug it in and then tune it accordingly… possibly change trans tables and such to get it to work right.

Also a 3400 will run on a stock OBDI.5 ecm.  I ran a 13.818 with OBDI.5 and a 100 shot of nitrous on a stock 3400 and didn’t have tune issues, I’m sure it wasn’t optimal but it still ran fine.

Now to answer your ODBI swap question, the only side that would be the same is the passenger side where those go into the ECM, since its a through hole.  Yes the bulkhead connector will appear the same on the drivers side but the odds of all the pins begin the same are pretty slim, I've never compared the two and never had the ambition to since you can't do it with the auto trans in there.

[Cliff8928]

(3X00-Modified @ Mar. 20 2008,11:58)QUOTEApparently they have support for a 97 Pontiac Montana which should be the same as the Chevy Venture, but I was never able to verify that since DHP doesn’t have a Montana mapped file so I couldn’t flash my 97 ECM with it to see if it would run the car. ÂÂÂ
That PCM goes in...

1997 BUICK LESABRE CUSTOM V6 3.8L 231cid GAS FI N Engine VIN = K
1997 BUICK LESABRE LIMITED V6 3.8L 231cid GAS FI N Engine VIN = K
1997 BUICK SKYLARK CUSTOM V6 3.1L 189cid GAS FI N Engine VIN = M
1997 BUICK SKYLARK GRAN SPORT V6 3.1L 189cid GAS FI N Engine VIN = M
1997 BUICK SKYLARK LIMITED V6 3.1L 189cid GAS FI N Engine VIN = M
1997 CHEVROLET VENTURE V6 3.4L 207cid GAS FI N Engine VIN = E
1997 OLDSMOBILE ACHIEVA SC V6 3.1L 189cid GAS FI N Engine VIN = M
1997 OLDSMOBILE ACHIEVA SL V6 3.1L 189cid GAS FI N Engine VIN = M
1997 OLDSMOBILE DELTA 88 ROYALE V6 3.8L 231cid GAS FI N Engine VIN = K
1997 OLDSMOBILE DELTA 88 ROYALE LS V6 3.8L 231cid GAS FI N Engine VIN = K
1997 OLDSMOBILE LSS V6 3.8L 231cid GAS FI N Engine VIN = K
1997 OLDSMOBILE REGENCY V6 3.8L 231cid GAS FI N Engine VIN = K
1997 OLDSMOBILE SILHOUETTE V6 3.4L 207cid GAS FI N Engine VIN = E
1997 PONTIAC BONNEVILLE SE V6 3.8L 231cid GAS FI N Engine VIN = K
1997 PONTIAC GRAND AM GT V6 3.1L 189cid GAS FI N Engine VIN = M
1997 PONTIAC GRAND AM SE V6 3.1L 189cid GAS FI N Engine VIN = M
1997 PONTIAC TRANS SPORT V6 3.4L 207cid GAS FI N Engine VIN = E

[1988GTU]

You can use obd1 with a 4t6X-e.
http://wot-tech.com/shop....01.html

[JeffD]

if I get a auto car, I have a 5 speed to drop in with the 3400, so no worries about that. that venture PCM swap is news for me, thank for the info on that and all the other applicable apps too.
I'm going to stick with OBDI for myself since I Don't have the extra cash for a DHP tuner anyway. but that Van PCM may come in handy if my friend ever wants to put a 3400 in his beretta.