jimmyd1953

I have a 1989 C4 L98 with 43K miles. I am looking to add horsepower. Currently the car has not been driven over 70 MPH. Would it be better to swap the L98 for an LT1 engine or add modifications to the L98 to get it up to 300HP? This car is all original.

Thanks,

Jimmyd

GREGGPENN

Getting more power from L98s isn't always easy! But, there is one easy method....Have you ever seen "The Flintstones"? Cut a hole in the floorboard so you can can use your feet like Fred!




Seriously though, exhaust is always the first suggested mod. Gears may be the next suggestion. Intake, cam, heads, and headers almost go together -- because of the need to pull the heads. If it's an auto, then you have to worry about how your Dana36 will hold up.

Unless you're ready to spend the big bucks (which if you're considering a LT1 swap...maybe), gears and exhaust are probably the easiest, best option.

Oh...and get that SOB above 70mph at least once/twice!

96 lt-4

http://temp.corvetteforum.net/c4/vader86/

l98tpi

Racod

Seriously HP numbers aside, unless you are racing you will not miss the lt1. Lots of debate on the forum. The lt1 is a great motor but for everyday driving the l98 will do just fine. I started with a full exhaust from the manifolds back. I removed the precast and installed a high flow main. HUGE difference. Too many good exhausts to list. I went with magnaflow

Air cleaner helps but I think throttle body and intake are next. Those mods and a good tune will get you close

There is alway the 383 option too.

Good luck

l88rocket

Nitrous

Rodney_Gold

If you just want more vooma off the line and a better seat of the pants sensation and to smoke the tyres a little , change rear gears to a 3.55 or 3.7x .. most effective upgrade - especially if you never drive above 70mph
Generally , adding go fast goodies to boost HP requires a higher revving engine..an engine is merely an air pump - the more air you can get in , the more fuel you can burn ...

jimmyd1953

Thanks to everyone for your replies.

C4in mesa

GREGG I got a criminal speeding ticket a week ago. I had just got on the freeway US60 and just didn't see the DPS officer in the HOV lane. I went to pass the cars going 65mph and hit the gas. I go from 65 to 90 in a sec or two and he hits his lights. That guy was a real dick. Now I have a criminal speeding ticket to deal with in Nov. So I advise EVERYONE be careful and get that SOB above 70mph !

JrRifleCoach

A Criminal Speeding Ticket "CST" a felony equal to stabbing someone to death.
Think about it. The guy with the knife will get off.

Wish you luck brother.

OP, the best mod I made was the cam and a tune.
Of course those were backed up with a hi-flow cat, Borlas, pre-cat removal and a few others.

C4in mesa

I was advised to walk in and ONLY plead not guilty. Force the DA's office to spend lots of money they don't have as my bargaining chip. Worse case scenario is the same either way.

Best mods I made long tube headers, true dual exhaust 2.5", hi flow cats mufflers, roller rocker arms, cam, change air intake. There are a half dozen other changes as well.

GKK

Be a MAN and take Responsibility for what you did!...It's time to Grow up...

Don't do the Crime if you can't do the Time!...







.

383vett

Brutal. No sympathy from this guy. I have gone over 100mph on Mexican roads and never did time. I think most here have.

C4in mesa

That's the dumbest thing I've ever heard in my life. You have obviously never been in a court room before. A prosecutors dream ! Last I time I checked I was not guilty until proven guilty. If you chose to go and simply take whatever the state gives you be my guest.

GKK

No, I haven't because I own up to my acts and pay the fines.

I got caught speeding on my sport bike years ago. I had two policeman following me because I didn't stop right away. They told me I was doing 65 in a 40. I just said, "Yes I was", I figured I was gonna get a ticket anyway so, why not just tell the truth!

The policeman took my license and then came back and said, "I'm just giving you a warning this time"!

You've been to Court before and you still haven't learned anything?!...Get used to the inside of a Courtroom!

You're Obviously going to learn things the Hard way!........ You have a long road ahead of you...







.

playsdixie

really!!! you guys are going to debate speeding to a bunch of guys who own corvettes.......you guys should be in congress...

C4in mesa

I'm not debating anything this guy thinks I am 16yrs old.

GKK

You sure act like it!

Everyone speeds, but they don't come on here complaining of getting tickets!...That's the difference...

C4in mesa

I passed a row of cars everyone going 65-70. I did not see the DPS officer. He swooped in behind me lights flashing honkin some Damn horn in 2sec bursts. I proceeded to get off the freeway. He takes my keys then goes to his car. I'm thinking this guy is nuts ! Am I gonna just take off ? And go where ? Anyway he comes back and tells me I was going 90 and I said YES I WAS do you have to write the ticket for criminal speed ? No reply. Hands me the ticket my license and walked away. I never tried to BS the cop nor will I try to BS the prosecutor. Its a matter of bargaining. That is the center point in free trade. You are crazy to simply throw yourself at the mercy of the prosecutors office but be my guest. I have not gone over 80 since my ticket. Last ticket was 10 or 11 years ago. This took the wind out of my sail for sure. I realize the cops attitude stems from fatal accidents. People are typically killed at 90+mph. So I'm gonna take my experience and learn from it. Be more careful and don't change lanes without checking for the DPS first !!! and ease up on the pedal

C4in mesa

Where am I complaining ? Look you are embarrassed now leave it alone.