Dostovel

Just curious if there is a TT kit for the L98 C4

neat

No.

cplonner

i have have pictures of one that they have done in an 86, I dont know if you could buy that one, but it was done.

Dostovel

Damn.... well with internal work on the engine and some sort of FI, what kind of power could I see out of this engine? Or should I just swap... I'll have enough saved up when I get back from Iraq to be able to do something big with this bad boy

C4driver99

You would be better to just swap it out. The L-98 is old technology and would not last under the strain of one turbo much less twins. The best bet would be to get a 383 bore it out and then turbo that. JMHO. Goodluck and thanks for serving our country

89b2k

I'll have to disagree with your comments about L-98 not lasting . With a forged bottem end a L-98 would hold-up just fine. Witness the L-98 Callaways that have just a forged crank and pistons. My stock Callaway makes over 380 rwhp .Surf and Sun has made over 435 rear-wheel hp with a stock Callaway by turning up the boost .

themonkeyoflife

damn that looks good tt vette

ok thoughts

bench racing here but comp and i think this is good for about 1200

400 block bored .030 over and destroked
forged eagle crank
forged eagle h beams
forged mahel coated pistons

afr 220's

edelbrock single plane
accufab 1000 cfm throtlebody
fast controller




now this is capable of 35 psi comfortably and with a digital bost controller i can just turn down the boost and hey welcome home 87 octaine

if you do twin turbos do them right there is no point in speanding that much money on all the stuff and then later wanting more power and having to start all over again

do it right once and set it up so you build 1 count that 1 motor and never come back to that motor to replace rods pistons crank ect beacuse you under built the motor

in mine i will be putting a t56 with guts from g-force transmissions

but if you are not ready for 800+ HP go NA and just throw some eagle rods and crank maybe some forged srp pistons and afr 180s

thats good for a solid 450hp for way less than a tt setup see
http://www.airflowresearch.com/
for info

look if you to twin t4/5 turbos you have to make the guts stronger and if you go any bigger there is no point in not adding the cubes especially beacuse the cost to do the 350 is so close to a 400

thoughts

C4driver99

You are correct if it has a stronger end and forged insides. I was conforming to a STOCK L-98. For it to be twin turbo.....you will have to have it forged as you said have a better exaust, intake, better rearend. Now once you have that work done to it then yes it will last just fine and will be a hell of a torque monster. Now if you were planning on going that route hell yea do it You would make the L-98 owners proud. I have often thought about charging mine but i have nowhere near enough cash or the smarts to do it myself. Goodluck with whichever you take.

skateparkdave

Callaway has done it.
http://www.supercars.net/cars/374.html
If your pockets are deep you may be able to buy the stuff needed and get some advise from them if they're still around but I dont think they sell a kit per say. Probably cost about as much as just finding a Callaway car and buying it already done right. Seems like alot of money for a 13.4 second 1/4 mile to me. Cool as heck though.

mn_vette

The Callaway car is not a bolt on kit. They made hundreds of changes to the chassi, frame and everything else to make that thing fit.

Twin turbos are definately a BIG project. Ask some of us turbo guys how long it took us to get our setups on the street. And trust me, you can break a fully forged engine if you don't have ALL the correct components for the setup and they must work together properly.

If you are looking for a kit, then do a supercharger. 600rwhp is pretty easy to obtain with a 383, 210 afr's, and a supercharger.

How much is your budget?? And how long do you want to have the car down for working on it? Doing things in baby steps isn't a bad idea. I would start with a low compression stroker. Obviously it won't be as much HP as with a high compression stroker, but the change will be HUGE compared to what you have now.

The L-98 platform is fine for a build like this, just make sure you get a new intake. By the way the engine alone will probably cost you close to $10k.

Intake 1K
rotating assembly 2-3K
machine work and such 1k
AFR heads 3k
new TB 500
injectors 500
cam 250
roller rockers 250
new programming 500-1k
new clutch or torqe converter 500-1k
headers and cat back 1-2k

so a quick estimate you've got 10.5k - 13.5k in parts on just the stroker setup, not to mention the forced induction after that.

lcvette

I think in that situation.. www.dyno-flow.com offers a complete ready to go in shortblock using the dart little M block and eagle internals (4340 forged version) for like 3700 bucks.. this is one hell of a deal. not great for us LTx guys as it is not reverse cooled, but I am looking at this for our race car project we are gonna do with the 85 L98 vette.. gonna go something like a 421 CI short block from them with a few upgrades like the steel main caps (5) not just the center 3.. and then we are going to top the engine off with soem brodix 18* heads and intake and of course something very big like a 91mm or even a 101mm turbo.. this car will be gutted and set up for the strip.. we have not decided whether to go ford 9" or try and get a Dana 44 to stay alive behind it all with a spool and some reinforcement done to the case along with chromolly half shafts and the rest of what would be needed..

anyways.. that is a bullet proof platform to work with.. all blind holes for the head bolts on the dart blocks and beefed up to handle to power of big boost!

Chris

skateparkdave

I said that didn't I ?

I was really just pointing out that it had been done.

Fatt Vette

http://forums.corvetteforum.com/sear...archid=2511929

You can do it yourself with a little know how and a lot of time. I built mine; it took nine months to complete. There are a few things I would do differently if given the chance but all in all it turned out pretty well. My main objective was to make the system as invisible from the top of the engine as practically possible.

In December 2005 I added an adjustable boost controller. I got greedy and melted a piston in the stock L98. The past six months have been spent building a bullet proof 383... It is almost ready to go back in!

neat

Direct linking to search results doesn't work on this site for some reason, what were you trying to show us?

Fatt Vette

http://forums.corvetteforum.com/show....php?t=1049850

http://forums.corvetteforum.com/show....php?t=1078716

http://forums.corvetteforum.com/show....php?t=1120373

http://forums.corvetteforum.com/show....php?t=1230977

neat

Did you ever figure out the oil soaking/spraying problem?

Fatt Vette

increased blowby was creating pressure in the crank case, pushing up the dip stick and blowing the oil out.

themonkeyoflife

an easy way to get rid of crankcase pressure is to plumb two lines from the stock baffled breathers to the exaust in an na motor it is imperitive that you dont plumb into the collector rather go just after in the main exaust pipe on a turbod' motor go after the turbo the pipe will cause vacume, reduce ring flutter, and it doesnt have to be rebuilt regularly

its an old smokey trick

travis

krivera

1985 Corvette

I'm getting red X's when I try to see the pictures! This computer is worthless! I want to see that twin turbo L-98!