L98 weakling getting sand kicked in face
Thread Starter
Instructor
Joined: Dec 2001
Posts: 198
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From: St. Charles County MO
L98 weakling getting sand kicked in face
OK guys, I am tired of all these new passenger cars with 275 - 300 horsepower running past my 6 speed 245 horses. I want to keep the engine stock looking, but would like to get to maybe 350 - 375 horses. I intend to change to 3:73 gears and am wide open to upper end enhancements. You may throw in a few 383 ideas in case I need to go to a more extreme approach. I have down a few basics, K & N with open lid, air foil, and a hypertech street chip. The 90 only has 38,600 miles on its clock. I only have 55 on mine, so this must be a mid-life crisis! Thank you.
Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Cheaper solution. Just push the gas pedal down a little further. These 275-300 horse sedans have no gearing, no torque, and, weigh more. The same coud be said for their sports car counterparts except the weight.
You should have no problem keeping up with any of the stock 300hp 2wd cars out there. That includes the new Mustang GT, the new 350Z, etc.
You should have no problem keeping up with any of the stock 300hp 2wd cars out there. That includes the new Mustang GT, the new 350Z, etc.
Last edited by CentralCoaster; May 26, 2005 at 04:51 AM.
Race Director
Joined: May 2001
Posts: 14,165
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Well the hypertech chip doesn't do much more for you than turn the fans on at a lower temperature. You can make a lot more power, but you did throw in the "keep it looking stock" criteria which severely limits your power potential. The biggest restriction ot the L98 engine is in the intake itself, it is limited to making power at a maximum of some 4500 RPM's, maybe 5000 with extensive port work.
If you're looking for simple bolt on modifications that will give you very healthy gains, forget about it. What you need are heads / cam / exhaust, but then you would still be limited by the intake on how much power you can make. There are plenty of intake alternatives out there that will allow you to still use the stock hood, therefore you could look stock with the hood closed. If you want to retain the stock look under the hood though you will be limited.
If you're looking for simple bolt on modifications that will give you very healthy gains, forget about it. What you need are heads / cam / exhaust, but then you would still be limited by the intake on how much power you can make. There are plenty of intake alternatives out there that will allow you to still use the stock hood, therefore you could look stock with the hood closed. If you want to retain the stock look under the hood though you will be limited.
Team Owner
Joined: Sep 2002
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From: OBAMA IS HITLER
Nathan is right. If you're looking for 100 horses with stock appearance, H/C/E is a must......looks like you're open to that no problem......adding to this and regarding the intake option, you'll get close to 350chp if you trash the stock manifold and go either:
TPIS BigMouth
LPE/Accel Superram (preferred, as some folks report fitment problems on the TPIS version)
+ AS&M large tube runners.
With this setup, expect to blow the doors off those annoying buzz-bucket pos imports.
TPIS BigMouth
LPE/Accel Superram (preferred, as some folks report fitment problems on the TPIS version)
+ AS&M large tube runners.
With this setup, expect to blow the doors off those annoying buzz-bucket pos imports.
Race Director
Joined: May 2003
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Originally Posted by CentralCoaster
Cheaper solution. Just push the gas pedal down a little further. These 275-300 horse sedans have no gearing, no torque, and, weigh more. The same coud be said for their sports car counterparts except the weight.
You should have no problem keeping up with any of the stock 300hp 2wd cars out there. That includes the new Mustang GT, the new 350Z, etc.
You should have no problem keeping up with any of the stock 300hp 2wd cars out there. That includes the new Mustang GT, the new 350Z, etc.
I second that, except the GT has you at speeds over 75-80MPH. That car does weight around 250-300 more then our C4's, but has way more power in stock trim. I think if you can drive u can have him light to light, but in the 1/4 mile I dont know about that. I have seen a stock one run 13.75@101.5
Our L-98's dont trap that high.
Last edited by 88BlackZ-51; May 26, 2005 at 08:51 AM.
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Definitely heads and cam. Aftermarket intake, a good 2.5" exhaust, 1.6 rockers...That car will run hard. These are great 0-60/stoplight to stoplight cars but could use a little help once they are rolling.
You can always drop a 400 in and dust them all, even the C6
You can always drop a 400 in and dust them all, even the C6
Last edited by cv67; May 26, 2005 at 10:15 AM.
Team Owner
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From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Upgrades are great but it sounds to me like your stocker is not putting out the power it should.
L98's are torque monsters and most sedans and whatnot should not be in the same league as a properly setup l98 corvette. (At least in a straight line)
Maybe you should be more specific and what these other cars are.....
L98's are torque monsters and most sedans and whatnot should not be in the same league as a properly setup l98 corvette. (At least in a straight line)
Maybe you should be more specific and what these other cars are.....
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Michael S. Palmer
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Originally Posted by 88BlackZ-51
Our L-98's dont trap that high.
13.75 is a great time, I hope it was a stick.
Thread Starter
Instructor
Joined: Dec 2001
Posts: 198
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From: St. Charles County MO
I guess that I must have made it sound worse than it really is. I was trying to be a little humorous about having the "itch" to modify. I have great power off the line, but at about 60 and faster, these new cars have quick acceleration. I intend to do cam, lifters, and rockers. I just need some good solid suggestions. So far, you guys are doing good and I appreciate it. Give me ideas as to cam specs. I don't want to lose my torque but would like a little more upper end.
Thanks guys
Thanks guys
Team Owner
Joined: Sep 2002
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From: OBAMA IS HITLER
Putter, if you are planning on just cam/RR's and leaving everything else basically stock, then the LPE 74211 cam is a no brainer. Its one step up from the stock cam in terms of duration, and plenty of lift to throw in low-mid range torque that should bloody the noses of those clueless punks out there driving all those ugly imports.
Lifter replacement is a good idea if engine has 80,000+ miles.
I'm not entirely sure if you'll need a custom chip tune, considering you have speed density.....you'll need to check into this to be sure.....if you need a custom tune I can give you some ideas -- and I can definitely for sure tell you one person you'll never want to go to.....PM me if you're interested
Lifter replacement is a good idea if engine has 80,000+ miles.
I'm not entirely sure if you'll need a custom chip tune, considering you have speed density.....you'll need to check into this to be sure.....if you need a custom tune I can give you some ideas -- and I can definitely for sure tell you one person you'll never want to go to.....PM me if you're interested
Last edited by Red Tornado; May 26, 2005 at 11:21 AM.
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Indeed Vic'89 is running mid 12s with stock heads & cam.
If you do heads & cam along with proper bolt-ons you can get into the high 300 CHP range.
If you want optimum results with exhaust go with:
1-FL coated headers
2-true duals (2 1/2" or 3") with dual bullet cats
3-hi-flow mufflers
A close second choice is:
2-hi-flow cat
3-hi-flow cat back
For heads you have some choices:
1-port & work stock #113 heads with RRs
2-buy AFRs or TFS or other aftermarket heads
For a good cam there are a few choices, including:
-TPIS ZZ-4
-LPE
For stock type intake you have one choice:
-BM (Accel) base, LT (AS&M ) runners, 52mm TB
-cut lid with K&N filter
For simple bolt ons:
-toss the frisbee
-install a low temp T-stat, along with your HT chip
-underdrive pulleys
-cut back spark plugs
-AFPR to bump fuel pressure
When you go much over 300chp you will likely need:
-larger injectors
-possibly a custom chip
You will get a variety of suggestions here, as most of us have our favorites. For best results you will need to do some homework on the suggestions and come with the package that gives the best results for you.
If you do heads & cam along with proper bolt-ons you can get into the high 300 CHP range.
If you want optimum results with exhaust go with:
1-FL coated headers
2-true duals (2 1/2" or 3") with dual bullet cats
3-hi-flow mufflers
A close second choice is:
2-hi-flow cat
3-hi-flow cat back
For heads you have some choices:
1-port & work stock #113 heads with RRs
2-buy AFRs or TFS or other aftermarket heads
For a good cam there are a few choices, including:
-TPIS ZZ-4
-LPE
For stock type intake you have one choice:
-BM (Accel) base, LT (AS&M ) runners, 52mm TB
-cut lid with K&N filter
For simple bolt ons:
-toss the frisbee
-install a low temp T-stat, along with your HT chip
-underdrive pulleys
-cut back spark plugs
-AFPR to bump fuel pressure
When you go much over 300chp you will likely need:
-larger injectors
-possibly a custom chip
You will get a variety of suggestions here, as most of us have our favorites. For best results you will need to do some homework on the suggestions and come with the package that gives the best results for you.
Burning Brakes
Joined: May 2005
Posts: 1,096
Likes: 37
From: Coldville
Well as you know technology is king!
comparing a 1990 L98 to 2005 cars, is like apples and orange
in its day the 1990 l98 was the S..t!
but its a different story today!
Now if you want to get the new vette then your back to a better
match up, but if you want your 1990 l98 to keep up it can be done, with the right amount of funds and time but if you want to keep it the way it is thats still cool and you have nothing to be ashamed of if you get beat by a few cars,
5.7 zero to 60 will still smoke allot of cars, my 1986 base model
corvette is not that fast but i dont get beat allot if i decide to run someone of the line, but on the highway gunning it at 60 miles per hour it is not as responsive as id like it to be but remember this is a 1986 corvette and
it is old technology what do you expect lol
comparing a 1990 L98 to 2005 cars, is like apples and orange
in its day the 1990 l98 was the S..t!
but its a different story today!
Now if you want to get the new vette then your back to a better
match up, but if you want your 1990 l98 to keep up it can be done, with the right amount of funds and time but if you want to keep it the way it is thats still cool and you have nothing to be ashamed of if you get beat by a few cars,
5.7 zero to 60 will still smoke allot of cars, my 1986 base model
corvette is not that fast but i dont get beat allot if i decide to run someone of the line, but on the highway gunning it at 60 miles per hour it is not as responsive as id like it to be but remember this is a 1986 corvette and
it is old technology what do you expect lol
Last edited by rad928music; May 26, 2005 at 03:22 PM.
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
*flame suit on*
I'm getting mid to high 12's with headers and drag radials and an 80 shot of nitrous. No internal engine mods.
Some frown on nitrous but I like the stock dependability and 28-32 MPG on the highway I still get when not racing. I like how this mod turns on and off at the push of a button. Plus you can do this and do it safe for under a thousand bucks.
I'm getting mid to high 12's with headers and drag radials and an 80 shot of nitrous. No internal engine mods.
Some frown on nitrous but I like the stock dependability and 28-32 MPG on the highway I still get when not racing. I like how this mod turns on and off at the push of a button. Plus you can do this and do it safe for under a thousand bucks.