http://i172.photobucket.com/albums/w37/98buickregalgs/power.jpg

Sadly this is all they talk about the Diesel engine which is why I bought the brochure :rolleyes: Engine cover looks good in black though.

http://i172.photobucket.com/albums/w37/98buickregalgs/dieselpower.jpg

There is a "Diesel Supplement" owner's manual that came with the truck when it was new. It's a second owner's manual that is specific to the 6.5. If it wasn't with the truck when you bought it, the previous owner misplaced it.

There is a "Diesel Supplement" owner's manual that came with the truck when it was new. It's a second owner's manual that is specific to the 6.5. If it wasn't with the truck when you bought it, the previous owner misplaced it.

Yeah the regular manual was in it but no supplement :(

That 430 ft/lbs at 1800 RPM looks a whole better than the 454's 410 ft/lbs at 3200 RPM. I've owned several 454's and trust me, you don't want to the old big block hanging 3200 RPM for a very long time. At best, you will need to become a member of OPEC (8 MPG) and at worse, you will have piston #1 trying to swap holes with #3, #3 with #5, #2 with #4, etc...you get the picture.

maybe i'll be painting that turbo power cover after all? lol. i wanted the gray to be black and have the red letters so it would match the truck. is it metal or plastic on the 96? need to know which can of black paint to use. :D:D

the cover looks a lot better in black. wonder how many trucks that cover was on.

maybe i'll be painting that turbo power cover after all? lol. i wanted the gray to be black and have the red letters so it would match the truck. is it metal or plastic on the 96? need to know which can of black paint to use. :D:D

My 96 suburban has a plastic turbo power cover.

That 430 ft/lbs at 1800 RPM looks a whole better than the 454's 410 ft/lbs at 3200 RPM. I've owned several 454's and trust me, you don't want to the old big block hanging 3200 RPM for a very long time. At best, you will need to become a member of OPEC (8 MPG) and at worse, you will have piston #1 trying to swap holes with #3, #3 with #5, #2 with #4, etc...you get the picture.

My 6.5 only has 10 ft lb more than my 1978 454 but it makes its power at 2800 instead of 3200. I used to drive mine at 3000 rpm for many miles at a time...damn TH400 and 3.73 gears. Only thing i can complain about is the excessive interior noise from the glasspacks. That thing sure did sound good tho. Cant wait to see how it pulls :D I need it for a backup in case something happens to the burb.

maybe i'll be painting that turbo power cover after all? lol. i wanted the gray to be black and have the red letters so it would match the truck. is it metal or plastic on the 96? need to know which can of black paint to use. :D:D


id like to find one to put on my block... i bought the truck without one. do all the 90s diesels come with the same cover (i.e. are they interchangeable?) for instance, if i find a cover off a 94 6.5, will it install cleanly onto my '98?

The cover is plastic Dave.

time to get the plastic paint out then. :D now i've got something to do tomorrow.

I like the 195 hp @ 3400 rpm. Who runs a diesel at 3400RPM ? I don't think I have ever taken mine past 2500 and usually try to keep it below 2100.

I guess most of you haven't been around this forum too long;)

Those plastic covers serve absolutely no purpose other than aesthetic. In fact, what they do is hold heat in - you know, right about the same place the IP and PMD happen to be? Hmmmm. You'll find most people have removed them. If you're not doing any towing, it probably won't matter. But if you are towing or even if you're just adding power - take it off and don't look back!

But, the black does look better than the gray, or at least it's different!

got two sitting on the shelf. Would you believe I bought the one thinking I needed it way back when ?

weve got like four sitting over here, we took them off of all our trucks.

id like to find one to put on my block... i bought the truck without one. do all the 90s diesels come with the same cover (i.e. are they interchangeable?) for instance, if i find a cover off a 94 6.5, will it install cleanly onto my '98?
No I made that mistake.

I like the 195 hp @ 3400 rpm. Who runs a diesel at 3400RPM ? I don't think I have ever taken mine past 2500 and usually try to keep it below 2100.


My 1987 300D redlines at 5500 :D

I guess most of you haven't been around this forum too long;)

Those plastic covers serve absolutely no purpose other than aesthetic. In fact, what they do is hold heat in - you know, right about the same place the IP and PMD happen to be? Hmmmm. You'll find most people have removed them. If you're not doing any towing, it probably won't matter. But if you are towing or even if you're just adding power - take it off and don't look back!

But, the black does look better than the gray, or at least it's different!

If you're PMD is mounted elsewhere besides on the pump, why not put the cover back on? The engine bay looks much better and complete with than without the cover. Mine is staying on...

My 1987 300D redlines at 5500 :D


Mine only goes to about 4900, but that's plenty.

Nick

If you're PMD is mounted elsewhere besides on the pump, why not put the cover back on? The engine bay looks much better and complete with than without the cover. Mine is staying on...


It can't do your intake temp any good. I have 3 of them; pay the shipping and they're yours.

Nick

time to get the plastic paint out then. :D now i've got something to do tomorrow.

Post Pics :)

And I think the covers were changed in 97 or something?

All I know is there are 2 different types of covers.

i think they changed in 95 or 95. My 96 has the new style one.

MBZ is practically alone in running diesels at high rpm. Ours is red at 5000, was not aware earlier revved higher. Of course passenger car engines and light truck engines are apples and oranges (we'll see some flak from euro members - over there they use mercedes wagons as trucks)

6.5 Turbo cover: someone did some temp measurements a while back and the cover was found to be fine. The engine looks incomplete without it, plus in my case it hides the plumbing parts on my intake that provide a port for my boost gage.

Post Pics :)

And I think the covers were changed in 97 or something?

All I know is there are 2 different types of covers.

There are actually 3, as the 92-93 model years had a cutout for the throttle bracket and cruise control cables.

Regards,

The Finnish guys have the same engine (OM603) with stock internals in it making some serious power and rev them to 6k or so without breaking them.


Mine only goes to about 4900, but that's plenty.

Nick

I like the 195 hp @ 3400 rpm. Who runs a diesel at 3400RPM ? I don't think I have ever taken mine past 2500 and usually try to keep it below 2100.

Funny... I try to keep my rpms above 2100... it's usually at 2200 or 2400 around town... I'm constantly in the high 3k rpms... But then again... What do I know... something about lugging being bad for these engines? :D I need somewhere to preach "high speed" to save these high speed diesels...

Listen to a big rig or fire truck around town, they are forever revving high, and they have a huge load on the most of the time... They last forever.

My milage isn't poor either. 14.5 mpg around town is good for my right foot.

Funny... I try to keep my rpms above 2100... it's usually at 2200 or 2400 around town... I'm constantly in the high 3k rpms... But then again... What do I know... something about lugging being bad for these engines? :D I need somewhere to preach "high speed" to save these high speed diesels...

Listen to a big rig or fire truck around town, they are forever revving high, and they have a huge load on the most of the time... They last forever.

My milage isn't poor either. 14.5 mpg around town is good for my right foot.

I am with you here. I never have mine below 2000 I have poor power that low (possible problem) I just always thought this was not a low RPM torque diesel like a Cummins. I lose my turbo whistle at 2500 about that it sounds like a V8 Gas job. 65 MPH is 2500 in my truck. So my 6.5 and low RPM's don't get along.

Well ya gotta realize I grew up driving a one stack Mack with a window in the back. I also owned and drove many Detriots which even those really never ran much over 2100 either they just sounded like more. Macks were comfortable in the 1600-1900 range of course I used to get sore elbows from shifting so much. Twin sticks. I realize the 6.5s and Powerstrokes can go more just still feel old school ya know ? Just doesn't feel right running them that high.

Oh, I agree it doesn't feel right. I just can't get away with not doing it. The truck has really very little power below 2000. I have a 5 speed, not sure how much effect it has on how these trucks drive, as I have never driven an automatic one.

My truck has a sticker on the air box that rates it at 175 hp at about 2800 RPM. The torque is arond 400 or so. I don't remember the exact #'s. I was a little sad when I saw that. Now I really need to mod it up.

I like the 195 hp @ 3400 rpm. Who runs a diesel at 3400RPM ? I don't think I have ever taken mine past 2500 and usually try to keep it below 2100.

Me :D

But I do get worried I'm going to blow a headgasket when I do that

http://www.youtube.com/watch?v=n_MnfzkYE4s

i keep mine 2400 rpm or under. I can still accelerate fairly fast ( at least it feels like it) and to me it feels like a waste wrapping it out past that point. The engine noise changes pitch and what not. Having been around farm machinery all my life none of the equipment i've been around would run faster than 23-2400 rpms, with the exception of some IH tractors. You're way past your peak torque at that point anyway. I just don't think diesels were meant to run really fast and last a long time.

My truck has a sticker on the air box that rates it at 175 hp at about 2800 RPM. The torque is arond 400 or so. I don't remember the exact #'s. I was a little sad when I saw that. Now I really need to mod it up.


Mine has the rating on the driver side valve cover.

id like to find one to put on my block... i bought the truck without one. do all the 90s diesels come with the same cover (i.e. are they interchangeable?) for instance, if i find a cover off a 94 6.5, will it install cleanly onto my '98?

Any of them will bolt on, but if you don't want to have to carve on it, then get one from a '97 up with the dual T-stat housing because the older square ones interfere with the upper radiator hose on the dual t-stat motors. You can get them on Ebay about any time and they are priced reasonable.

Mine has the rating on the driver side valve cover.

Mines on the airbox, but its just the horsepower rating

Mine makes pretty good power even under 2000... 6.5s, atleast when running correctly, make their peak power at 1800 rpm. I have 3.42 gears so maybe that helps keep me in my power band longer than those with 3.73s or 4.10s?