Bolt ons?

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Dec 4, 2014 | 07:16 PM

Dirty 1990

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Heel & Toe

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Bolt ons?

So I just want to hear other people's opinions on weather u u should just buy bolt ons or upgrade the internals port and polish and intake and exhaust manifolds On 1990 l98 which mods would u do if u were trying to achieve 350 hp and 350lb/tq?

Dec 4, 2014 | 08:52 PM

John A. Marker

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Joined: Mar 2004

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From: Dublin CA

To get to that HP you will have to do both. Internal...cam. Bolt ons: Heads, roller rockers, headers if your state will allow.

Dec 5, 2014 | 08:12 AM

ghoastrider1

Le Mans Master

Joined: May 2006

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From: indy indiana

add true dual exhaust to Johns list. Our stock L-98 heads just arnt that great, flow wise. Intake and runner replacement wouldn't hurt either.

Dec 5, 2014 | 08:29 AM

James93LT1

Drifting

Joined: Oct 2004

Posts: 1,477

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From: Hawaii

-Mini Ram, Super Ram, or modded LT1 Intake.
-Hot cam, 503 cam or similar.
-1.6 roller rockers.
-Port heads, (Elliot porting, AI porting) or good flowing aftermarket
heads.
-1 3/4" headers
-True dual exhaust
-Tune
-Stall converter, Gears for Auto
-Gears for stick

Last edited by James93LT1; Dec 5, 2014 at 08:31 AM.

Dec 5, 2014 | 01:18 PM

Dirty 1990

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Heel & Toe

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Thanks James93LT1
I was thinking along the same lines.
Also does anybody how many rpms the motor can handle with all the mods listed above without replacing any of the internals?
Thanks

Dec 5, 2014 | 01:28 PM

ghoastrider1

Le Mans Master

Joined: May 2006

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From: indy indiana

I would stay with stock RPM red line. 350 hp isn't that hard to reach..its the 350 tq that you really wanna get after.

Dec 6, 2014 | 10:25 AM

volkswagens-for-life

Melting Slicks

Joined: Nov 2013

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From: Orchard Park NY

Quote:

Originally Posted by ghoastrider1

I would stay with stock RPM red line. 350 hp isn't that hard to reach..its the 350 tq that you really wanna get after.

These cars have 350 ft/lbs stock.... crank yes, but some headers, heads, 1.6 rr's and you're way over 350 ft/lbs to the wheels.

Dec 7, 2014 | 08:44 AM

James93LT1

Drifting

Joined: Oct 2004

Posts: 1,477

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From: Hawaii

Quote:

Originally Posted by Dirty 1990

Thanks James93LT1
I was thinking along the same lines.
Also does anybody how many rpms the motor can handle with all the mods listed above without replacing any of the internals?
Thanks

It would depend on your mileage/ condition, but it should spin, short burst of 6K safely. With the above combo, you should be able to get 350 to 375hp, and 350 tq to the rear wheel..... a little less for auto.

I would recommend the Mini Ram or LT1 intake for a 6 speed, and Super Ram for auto.