Modifying an LT4 vs. LS1
SLammed with 19" Hres, probably white powercoated 845 Rs, could stick a 12 inch rim in the back cuz of the flares.. 3.73s, a big solid roller cam, fully ported heads .. fully forge the rotating assembly and tons more... would be so much more flashier than a plain old quasar
) but the overall package has really grown on me lately. There are a couple of mint, low-mileage ones on Ebay right now that are garnering bids around $30K. It seems like a pretty good buy for a limited edition Corvette that's barely broken in. As far as modifying one, what would be wrong with that as long as the car appears externally stock and retains matching numbers? A cam, some headwork, possibly long tubes...maybe even a stroker. Especially if done by a reputable tuner like LPE. It would only increase the fun factor and result in a more desireable Vette IMO. Absolutely no Frankenstein bodywork or tack-ons though.

I guess you have checked the Lingenfelter price for an LT4 383 package?
Even that package won't match the run of the mill stroker LSx C5, but the skunk is rare and impressive. As long as you know what you're getting into, go for it. Even my heads/cam LT1 car has the guts to run with C5 Z06s, and the feel of driving it is quite different from the usual C5.
There is a skunk reunion at Carlisle this year, one of many reasons the GS is getting a higher profile. They may be the first of the C4 special cars to appreciate strongly in value. You see one, it can't be confused for anything else.
Last edited by FELNGR8; Apr 4, 2006 at 07:31 PM.
Also in regards to the LT1/4 versus LS1 debate....You guys should venture over to LS1tech.com and look at some of the LT1/4 cam only dyno's as well as the heads/cam cars. If you only hang around Corvetteforum, you'd believe that the only way you could get 400RWHP would be a fully built stroker with extensively ported heads. There's a big world out there and more potential in the LTx engines than most realize.
The LS1 will make stupid power with just a cam and bolt ons(450 rwhp on a G5X3 is not unheard of). For that on an LT4, you're gonna need a LOT more work- H/C for sure, maybe a stroker. The simple fact is that the LS1 is a better motor and the C5 is a better chassis. If a modded street rod is your desire and you have the cash, go for the C5. IMHO, this is not even debatable- it's simply fact.
The C5 is better ergonomically, has a better suspension setup (true dual A-arms front AND rear), has a much stiffer chassis, has a much more mod-friendly motor, and has a TON more aftermarket support at the moment. Some people (especially on this forum) will disagree with me, but I think they're biased towards the C4 for other reasons.





I talked with LPE and they say the positioning of the factory cats on the LT4 make it difficult (if not impossible) to do a long-tube header setup and stay legal, whereas the LS1 at least has the cats further downsteam. I imagine the LS1 heads probably have more potential too, although can't the LT4 heads be made to flow pretty well? Is the LS1 really "that much" better?

Also in regards to the LT1/4 versus LS1 debate....You guys should venture over to LS1tech.com and look at some of the LT1/4 cam only dyno's as well as the heads/cam cars. If you only hang around Corvetteforum, you'd believe that the only way you could get 400RWHP would be a fully built stroker with extensively ported heads. There's a big world out there and more potential in the LTx engines than most realize.
The Best of Corvette for Corvette Enthusiasts





I too am probably at least at the 25K level including the purchase of the car. It could use a paint job too. I've never added it up because I probably don't really want to know. But it doesn't matter to me. Even though I've driven a C5 and they're nice, they're just not what I want. My '95, which has my personal touches from one end to the other, suits me just fine.


I'm not that deep but after 8 years of owning my 146K 92 I definitly know that feeling. My paint, interior and weatherstripping is absolutle **** but it still makes good power!
That said--the LT design has big disadvantages that bit me in the _ss. For one, the gear-driven waterpump. My wp seized slightly and the gears are crap in the LT4 or LT4 ED so it ruined the motor with metal. The timing chain on the LT cars is a not so great.
Another is the disadvantage is the opti. Not as reliable on a stock set up and a stumbling block for highly modded (high rpm) cars.
Another-- is just that the LT cars are by definition older and likely to be more maintance. Not an issue if you DIY but if not, getting something newer with no maint. starts looking attractive. And the flywheel is very expensive on the LT and it does go. Slave Cylinders have also been a quality issue.
On the other hand, the C4 has the best manual trans. in the ZF that I have ever driven (includes vipers, C5s, Z06, etc). Nicest clutch feel too. And I like the lines of the car better for the most part on the C4. Also, much nicer seats for track use in the C4 and they protect you in an accident. I hated the C5 seat at the track--my face was almost on the window as a passenger.
That said--the LT design has big disadvantages that bit me in the _ss. For one, the gear-driven waterpump. My wp seized slightly and the gears are crap in the LT4 or LT4 ED so it ruined the motor with metal. The timing chain on the LT cars is a not so great.
I have a mezziere heavy duty pump. with dyno proven 10 rwhp @ 5500 rpm.. im expecting it to free up much more at 8k. eliminates the waterpump issue and allows use of a heavy duty double roller.
Another is the disadvantage is the opti. Not as reliable on a stock set up and a stumbling block for highly modded (high rpm) cars.
I went with a distributor in the back of the lt4 manifold. eliminates the opti altogether. Not sure if an aftermarket ecu is required but im using a gen 7 dfi. this is an expensive alternative but it does fix the issue doesnt it.
And the flywheel is very expensive on the LT and it does go.
Using a mcleod ALuminum flywheel. Saves over 30 lbs. i dont mind the noise
Slave Cylinders have also been a quality issue.
thats why mcleod includes one in their street twin setup.
I have to agree with the zf tranny.. the feel is awesome compared to many cars. I had mine balanced and blueprinted with all the synchros welded and bearings upgraded with oil passages massaged out by Bill at ZFdoc. shouldnt give me any problems there either
I've owned both, the LS1 is the better choice. It's not even a contest.
You can band-aide the problems with the LT4 all day long, preach about the collector's value, and talk about all that other silly crap until the cows come home; at the drag strip, the road course, and on the local boulevard the C5 is the clear winner. Go to your local drag strip and count the sub 12.00 C4's and sub 12.00 C5's. You'll have triple the number of C5's. Park a C5 next to a C4 at a busy restaurant and see which car attracts the most attention.
He didn't ask what your opinions on the styling of a C4 VS a C5 were, so interjecting that is really pretty pointless.


I agree that a newer car will attract more people. Just like a C7 will attract more than a C5 few years ahead from today. C4 sold from 1984-1996. 13 production years (Base, 35th, ZR1, 40th, Callaway, CE and GS), people already were attracted by C4 long time ago.
If you like a C5 and invested 30K on your 92 but think C5s are winners then...
Go and buy a C5 for 30K or less. Many C5 for 30K or less listed here.....
http://motors.search.ebay.com/C5_Pas...Z3QQsacatZ6001
Last edited by PLRX787; Apr 5, 2006 at 08:53 PM.
For me, styling is everything.
As an example, if someone produced a Ferrari engine in a stiff and agile Volkswagen package, I wouldn't buy it.
That's why I will keep my C4 instead of buying a C5.
And, that is why I still have my C2 that I bought 38 years ago.
Sure, my '92 will run circles around my C2; but, my C4 isn't even in the same ballpark when I look at my C2.
Of course, this is all personal opinion, your mileage may vary.
Tom Piper
Last edited by Tom Piper; Apr 6, 2006 at 07:03 AM.
One thing that's important to point out is that the original poster currently lives in California. With that in mind, our LT1 and LT4 packages are both CARB legal, with EO numbers, so if you plan to stay in CA, I would think there would be an advantage in being able to drive the car you want, with the power you want, and not have to worry about any reprocussions from the state.
Hope this helps,
Ed
Hell, I just did this last night... stock 02 Z06 with a set of emmission legal headers w/cats , a vararam, and a catback. well and a tune
Last edited by Alvin; Apr 6, 2006 at 05:10 PM.
One thing that's important to point out is that the original poster currently lives in California. With that in mind, our LT1 and LT4 packages are both CARB legal, with EO numbers, so if you plan to stay in CA, I would think there would be an advantage in being able to drive the car you want, with the power you want, and not have to worry about any reprocussions from the state.
Hope this helps,
Ed
But there's another point. The GS is a collectible, and modding it with the Lingenfelter package would not diminish the value at all. Initially he wouldn't recover the LPE cost, but down the road it would almost pay for itself in desirability. Down the road when these cars are the stars of B-J auctions.
Sure any of the thousands of C5 Cartek, Vette Doctors, ECS, MTI, LGM, DRM, <name it> package will be quicker at the drags. But so many C5s have been customized six ways to Sunday and 427 packages are run of the mill. An LPE skunk will always be rare, desirable, and valuable.
And C4s are just plain more fun to drive than C5s.
Last edited by FELNGR8; Apr 6, 2006 at 09:16 PM.





But there's another point. The GS is a collectible, and modding it with the Lingenfelter package would not diminish the value at all. Initially he wouldn't recover the LPE cost, but down the road it would almost pay for itself in desirability. Down the road when these cars are the stars of B-J auctions.
Sure any of the thousands of C5 Cartek, Vette Doctors, ECS, MTI, LGM, DRM, <name it> package will be quicker at the drags. But so many C5s have been customized six ways to Sunday and 427 packages are run of the mill. An LPE skunk will always be rare, desirable, and valuable.
And C4s are just plain more fun to drive than C5s.
They'll always be a market for all original Vettes. But remember, this is a performance car above all else. And a properly done package such as the LPEs, Callaways, DRMs, etc. should not hurt the value of a desirable car. Quite the contrary, IMO.













