L98 Top End....
Thread Starter
Safety Car
Joined: Feb 2003
Posts: 3,849
Likes: 95
From: Springfield MO
L98 Top End....
So far I have done all the free mods as well as LT headers and 2.5in exhaust. What else could i do as far as giving it more top end? I want to be able to run with slightly modded LS1's. :smash:
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Top End.... (JJ 86)
The C5s top out in the 170-174ish region if the driver has enough ***** to do it. To do that you need quite a bit more hp. To hit 175mph I would give an educated guess of about 350hp needed.
Last year when my car was making 388hp & 445 ft/lb it was pulling a friend's 2000 Convertible with an aftermarket exhaust that ran high 12s at the strip on the highway. It also left a 2000 Camaro SS with catback behind to see 4 round taillights. :) The Z06s were still out of the question. A 50-150 punch showed the Z06 to have about 4.5-5 carlength advantage by the time the binders were put on.
Last year when my car was making 388hp & 445 ft/lb it was pulling a friend's 2000 Convertible with an aftermarket exhaust that ran high 12s at the strip on the highway. It also left a 2000 Camaro SS with catback behind to see 4 round taillights. :) The Z06s were still out of the question. A 50-150 punch showed the Z06 to have about 4.5-5 carlength advantage by the time the binders were put on.
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: L98 Top End.... (JJ 86)
What mods did you have done to achieve that hp & tq? I have an auto early 86. Are the stock iron heads capable of producing those #'s?
Thread Starter
Safety Car
Joined: Feb 2003
Posts: 3,849
Likes: 95
From: Springfield MO
Re: L98 Top End.... (MrNuke)
I've heard a lot about AFR heads but there're a little pricy. What other heads are out there which will give me a nice gain without breaking the bank?
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Top End.... (JJ 86)
What mods did you have done to achieve that hp & tq? I have an auto early 86. Are the stock iron heads capable of producing those #'s?
But #19-22 and #29-34 were not installed at that time.
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Re: L98 Top End.... (MrNuke)
To really run with LS1s, youll have to do what Scorp has done or the Miniram/Stealthram combos.
Its not going to be affordable unless you do alot of the labor.
Its not going to be affordable unless you do alot of the labor.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: L98 Top End.... (vader86)
Its not going to be affordable unless you do alot of the labor.
My costs were cut down a lot by doing things such as buying a used superram setup for $600 vs. about $1150 new. I bought the heads used for $600 vs. probably ~$1100 for bare & new since I still had to add all of my own valvetrain components. I got a timing set nearly new for I think $50 vs. $100. The cam cost me $200 vs. $350 new.
