L98 higway preformance.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
L98 higway preformance.
What will it take to get my L98 runing like a LT1 on higway, and still keep my "torque monster" on low RPM? Money is no issue... supercharger? :cool:
[Modified by devilfish, 12:40 PM 9/7/2001]
[Modified by devilfish, 12:40 PM 9/7/2001]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: L98 higway preformance. (devilfish)
So you have a 6-speed and 3.04 gears, good start.
For a quick boost (My site has results of these mods plus you're cuttent ones):
Lose that "frisbee" from the front of your water pump pulley-10hp.
Install a March underdrive crank pulley.
Upgrade the ignition to HyperTech coil/cap/rotor, MSD SuperConductor or TPIS wires, AC Delco plugs with ground electrode cut back to near edge of the center electrode. - 10hp
Relocate the MAT into the air filter lid.
Do the TB coolant bypass.
Install an AFPR and FP gauge (ACCEL makes a nice one); try 45-50psi.
Upgrade the valve train to 1.6:1 full rollers, new springs, Ti ratainers, lose the oil shedders, etc (unless you intend to do heads soon).
For a real boost (you've got mail with data on effects of these mods):
Port/polish those 113 heads (good for over 400hp).
Upgrade the cam.
Port or install the Big mough base & LT runners.
Install FL headers, ceramic coated in/out.
By now you will be running with the 2002 Z06, or very close.
For a quick boost (My site has results of these mods plus you're cuttent ones):
Lose that "frisbee" from the front of your water pump pulley-10hp.
Install a March underdrive crank pulley.
Upgrade the ignition to HyperTech coil/cap/rotor, MSD SuperConductor or TPIS wires, AC Delco plugs with ground electrode cut back to near edge of the center electrode. - 10hp
Relocate the MAT into the air filter lid.
Do the TB coolant bypass.
Install an AFPR and FP gauge (ACCEL makes a nice one); try 45-50psi.
Upgrade the valve train to 1.6:1 full rollers, new springs, Ti ratainers, lose the oil shedders, etc (unless you intend to do heads soon).
For a real boost (you've got mail with data on effects of these mods):
Port/polish those 113 heads (good for over 400hp).
Upgrade the cam.
Port or install the Big mough base & LT runners.
Install FL headers, ceramic coated in/out.
By now you will be running with the 2002 Z06, or very close.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
Re: L98 higway preformance. (65Z01)
wow, Quick answer 
I got som questions..
"AC Delco plugs with ground electrode cut back to near edge of the center electrode" Explain how to do this..
"Upgrade the valve train to 1.6:1 full rollers, new springs, Ti ratainers"
Is annyone selling som kind of "kit" with all this? What should i get and where can i get it?
"lose the oil shedders" whats that?
Im planing on to do heads next summer..
Regards..
I got manual with dana44... No stick sorry :/
Regards
I got som questions..
"AC Delco plugs with ground electrode cut back to near edge of the center electrode" Explain how to do this..
"Upgrade the valve train to 1.6:1 full rollers, new springs, Ti ratainers"
Is annyone selling som kind of "kit" with all this? What should i get and where can i get it?
"lose the oil shedders" whats that?
Im planing on to do heads next summer..
Regards..
I got manual with dana44... No stick sorry :/
Regards
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: L98 higway preformance. (devilfish)
The method to mod the plugs is on my site.
Comp Cams sells cam and valve train kits but I didn't go that route. I started out to do just rollers; once into the job I decided on valve springs, etc too.
GM put tin caps (oil shedders) over the valve springs and under the retainers; in later years they omitted them to increase the rev limit. These shedders and stock steel retainers weighed twice as much as the Ti retainers alone, so I spent a little extra $$ on the Ti to bump the rev limit another 200-300RPM for safety (if you look at my current power curve you see that I should be shifting at about 5,400 rpm, very close to the stock rev limit). I think I can come up with the parts list if you e-mail me.
You may want to just wait till next summer to do your valve train with the heads; if you decide on a cam too it will drive your valve train choices.
Comp Cams sells cam and valve train kits but I didn't go that route. I started out to do just rollers; once into the job I decided on valve springs, etc too.
GM put tin caps (oil shedders) over the valve springs and under the retainers; in later years they omitted them to increase the rev limit. These shedders and stock steel retainers weighed twice as much as the Ti retainers alone, so I spent a little extra $$ on the Ti to bump the rev limit another 200-300RPM for safety (if you look at my current power curve you see that I should be shifting at about 5,400 rpm, very close to the stock rev limit). I think I can come up with the parts list if you e-mail me.
You may want to just wait till next summer to do your valve train with the heads; if you decide on a cam too it will drive your valve train choices.
