can any tell me whats the difference between and lt1 and a l98 mine is a 91 coupe i always thought it was an lt1 but someone on the firbird forum said it was an l98. just wondering whats the difference :seeya

 

The LT1 started in 92 . The engine incorporated a new camshaft, cylinder heads, a higher compression ratio, and multiport fuel injection to achieve 300 hp. compared to the 250 on the L98 engine.


[Modified by HG, 8:45 PM 1/22/2004]

 

91 is an L98, about 50hp less than the LT1

LT1 is a Gen II SBC, totally different intake/heads/cam/exhaust/block/cooling, etc etc. They changed it all.

 

thanks for the info guys .i only have 250 oh :sad: ill have to do something about that :auto:

 

As well you should! :cheers:

More power!!! :smash:

 

any info on what i should :confused: :steering:

 

Ok, I'll put it to you straight. L98's are just plain better! :jester
Dont forget! you have 340 ft lbs of torque.....It doesent take much to take a stock Lt1....get to modding. :thumbs:

 

Start off with the exhaust. The L98 vettes came with really restrictive mufflers. You will feel an immediate difference. :hurray:

 

Start with the free mods. Check the "tech tips" section of the forum. The waterpump "saucer", and porting the plenum are 2 big ones in my book. Then Exaust, headers, afpr, maybe a 52mm Throttlebody. etc. If you have an automatic, most later L98's benifit well from a torque converter change. 2000-2200 rpm is a good range for a driver/mild mods car.

You can go as fast as your wallet (or purse) is deep. :steering:

 

:withstupid: And don't forget, you many have less HP than an LT1, but you've got more low torque :thumbs:

:cool: :cheers:

 

Torque monsters rule! :D


[Modified by Z-07 freak, 2:50 PM 1/23/2004]

 

:withstupid:

HA! Proof!

See im not the only one. :jester

 

A 91 L98 has the sametorque as a 97-00 LS1 350 lb ft whereas a 92-93 LT1 has 330 lb ft and 94-96 is 340 lb ft. The main reason L98's have such a low hp rating is the tuned port runners can't flow enough air to into the engine past 4500 RPM. LT1's can rev higher which makes more hp. :seeya

 

[QUOTE]Ok, I'll put it to you straight. L98's are just plain better! :jester/QUOTE]

Bring it on!!! :jester

-Rick

 

This article would beg to differ
http://www.vettenet.org/torquehp.html

 

:thumbs: :party:

 

Ok, I'll put it to you straight. L98's are just plain better! :jester
Dont forget! you have 340 ft lbs of torque.....It doesent take much to take a stock Lt1....get to modding. :thumbs: [/QUOTE]

:iagree:

 

:thumbs: thanks for the help guys :thumbs: i love this forum everyone is so willing to help everyone .i think this is just great.because been a woman i dont know to much about cars :cry so im thankful for all the help i get from everyone on this forum thanks :seeya :steering:

 

Well, I can't argue with that :(

Good job :thumbs: :cheers:

BTW, lots of good stuff in that article, but especially this part:

"...L98 is making 328 foot pounds of torque at its power peak (250 hp @ 4000), and we can infer that it cannot be making any more than 263 pound feet of torque at 5000 rpm...the L98 is probably making no more than around 210 pound feet or so at 5000 rpm, and anybody who owns one would shift it at around 46-4700 rpm, because more torque is available at the drive wheels in the next gear...
On the other hand, the LT1 is fairly happy making 315 pound feet at 5000 rpm, and is happy right up to its mid 5s redline.

So, in a drag race, the cars would launch more or less together. The L98 might have a slight advantage due to its peak torque occuring a little earlier in the rev range...the LT1 has a wider, flatter curve. From somewhere in the mid range and up, however, the LT1 would begin to pull away. Where the L98 has to shift to second (and throw away torque multiplication for speed), the LT1 still has around another 1000 rpm to go in first, and thus begins to widen its lead, more and more as the speeds climb. As long as the revs are high, the LT1, by definition, has an advantage."




[Modified by JSA 007, 10:26 AM 1/23/2004]

 

Just remember - All Vettes Are Beautiful! Enjoy your car and let it bring some joy into your life.