C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

L98

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Old Nov 1, 2011 | 06:44 AM
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Ive been asking a lot of questions and have been getting a lot of good answers, thanks to the forum members. Ive been working on putting an L98 into an off road racer, to blend a classic GM motor into a vehicle with a much different purpose from the 87 C4. So here is a picture of what was installed into the vehicle. Its not an award winner or chrome show-piece but I think does justice to the breed. Please excuse the chains and rope used for lifting the motor into the new engine bay.
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Old Nov 1, 2011 | 06:50 AM
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.. and here is a pic of it going to the happy recipient vehicle. you can see the two delete kits for the EGR and aircon compressor.
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Old Nov 1, 2011 | 06:56 AM
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and one more of yours truly, the weekend wrencher, with the recipient vehicle in the background at left.

trans is a 700r4 with manual lock up. Tires are 44" which is where the L98 torque monster will show what its got for a heart ...
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Old Nov 1, 2011 | 07:40 AM
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Originally Posted by Mountaineer
you can see the two delete kits for the EGR and aircon compressor.
Could have saved some $$$
http://forums.corvetteforum.com/1566807620-post48.html

http://forums.corvetteforum.com/1569586370-post53.html

http://forums.corvetteforum.com/1577159842-post103.html
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Old Nov 1, 2011 | 07:53 AM
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wow, I look at what other guys have done with C4 motors and it makes me want to be like them ... NICE looking work in the pictures you put up. I am learning that the cool aftermarket stuff for the L98 is pretty much an endless selection limited only by your budget. What is it, race happy but cash poor....

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Old Nov 1, 2011 | 07:54 AM
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Lookin good !!

If I still had my Jeep, my L98 may have made it's way under the hood, too. The 4 litre lacked !!
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Old Nov 1, 2011 | 08:05 AM
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Originally Posted by AGENT 86
Lookin good !!

If I still had my Jeep, my L98 may have made it's way under the hood, too. The 4 litre lacked !!
thanks ! Agent 86. Good to know someone out there knows where Im going with this project. Its a blend for me, in 1970 I bought a '67 427 big block for a steal price but had to give it up in a divorce. For this project I looked for that motor, but could only find junk or stuff way out of my price range. So I figured the classic L98 beast woud be a good compromise -- shes no chrome beauty or show girl but its mine ! and I got it out of the original C4 for $1500 !

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Old Nov 1, 2011 | 09:17 AM
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A little OT...

For a supposedly "crappy" engine, the L98 sure finds its way into a good many applications.

It has the one thing that makes a great motor for the street. Gobs and gobs of low end torque.

About how much did the rebuild cost you ? For the motor alone ? I am curious so I can start to budget money for rebuilding or replacing mine. Which is better, cheaper ?
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Old Nov 1, 2011 | 06:02 PM
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Originally Posted by 87Vetteowner
A little OT...

For a supposedly "crappy" engine, the L98 sure finds its way into a good many applications.

It has the one thing that makes a great motor for the street. Gobs and gobs of low end torque.

About how much did the rebuild cost you ? For the motor alone ? I am curious so I can start to budget money for rebuilding or replacing mine. Which is better, cheaper ?
hi guy, yup, its a torque monster, which is why it will be great for my application too. alot of the off road driving is slow/low throttle but under heavy loads turning 44" tall 20" wide tires through mud and up steep hills, and for the straight and level stuff it has great throttle response.

I bought it for $1500, it was still in the original car, and that included the flex plate, fuel ines, and all the bracketry and accessories. even the starter, which is nearly new. I havent been keeping track of every penny Ive spent but Id say that including a new wire harness for motor functions Im at about $3000 ( spent enough at Summit to get a $50 certificate !). So yes, for a total of $4500 I could have bought a crate motor, Vortecs are popular and a great motor, but I didnt want to go that route because this way is lots more fun, plus the aftermarket stuff for the L98 is endless, and I just think there is a "cool" factor with the L98, esp. with alum heads.
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