Jump to content

210 Horse Power


Recommended Posts

Posted

the autos were rated at 200 and the 5 speeds 210 why is this and is there any easy way to get the auto to 210?

Posted

That's correct for '91 thru '93 auto 3.4 DOHCs.

To make yours 210HP you can swap it to a 5-speed :wink: , or you can add some performance parts. The FFP UD Pulley and Chip would put you over 210HP.

Posted

I'm pretty sure it's just from the different compression ratio.

 

Auto = 9.25:1

Manual = 9.5:1

Posted

Yep. I think i read that manuals pistons were just a bit better. I could be wrong though.

Posted

Anyone ever rip out there manual pistons and compare them to auto? I'm surprised a 0.25 jump in compression made 10 hp......thats about the gains from 1.0.....maybe there was a bit to be had in tuning perhaps?

Posted

I compared the pistons and found the valve relief cuts were deeper on the auto by a small amount. I really doubt .25 is 10 hp. The tuning is close performance wise, same PE fueling, same WOT spark areas. Chalk one up for GM Powertrain messin with the dyno. Its not worth looking for a 5 speed engine.

Posted

i seem to remeber reading:

 

auto: 200hp @ 5000rpm

manual: 210 @ 5200rpm

(source: 1993 Chevrolet Catalog, 1991 Pontiac Catalog)

 

not sure if 200rpm counts for 10hp or not.

Posted
i seem to remeber reading:

 

auto: 200hp @ 5000rpm

manual: 210 @ 5200rpm

(source: 1993 Chevrolet Catalog, 1991 Pontiac Catalog)

 

not sure if 200rpm counts for 10hp or not.

 

That's the thing...............the auto may very well MAKE 200hp at 5000rpm...........but by 5200-5500rpm it probably DOES make the ~210hp the manual does.............but likely around 10hp LESS to the wheels (most LQ1 auto's seem to make 160-165whp stock, where manuals make 170-175whp..............the auto's seem to make peak power a little higher [a couple hundred rpm higher] too for some reason :? ).

Posted

the only thing i can think of where the autos make about 10 less is a crappier torque converter and actually maybe having to drpive power to operate the automatic

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...