LT1 Cam in a L98
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Junior Member
Joined: Mar 2008
Posts: 59
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From: Georgia
Car: 87 GTA
Engine: 350 TPI
Transmission: Automatics
LT1 Cam in a L98
Has anyone used this cam in a L98, if so will there be any noticeable difference than what comes factory in the L98. This engine is in a 1989 IROC-Z.
CAMSHAFT SPECS:
INTAKE
URATION/LIFT
@0.05 191 .418
EXHAUSTURATION/LIFT
@0.05 196 .430
LOBE SEPARATION 111
INTAKE
URATION/LIFT@0.05 191 .418
EXHAUST
URATION/LIFT@0.05 196 .430
LOBE SEPARATION 111
TGO Supporter
Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: LT1 Cam in a L98
The L98 cam wasn't alot different, just very slightly smaller. The specs varied a bit year to year with the LT1, but they weren't radically different than the L98 cams. I wouldn't recommend swapping an L98 cam for an LT1. It works well in the 5.0 engines because they had fairly small cams, especially the TBI and the auto trans LB9, but the L98 cam was substantially bigger than what those engines had.
If you want to make it worthwhile, use the stock LT4 cam at minimum, though the LT4 hotcam would be better.
If you want to make it worthwhile, use the stock LT4 cam at minimum, though the LT4 hotcam would be better.
Joined: Apr 2004
Posts: 3,001
Likes: 62
From: Salt Lake City, Utah
Car: 1988 camaro "SS"/ 1991 305/T5
Engine: 383 LT1 in progress/LT1TBI 355 soon
Transmission: Probuilt 700R4 3600 stall/ T5
Axle/Gears: Moser axles, 3.42 Eaton Posi
Re: LT1 Cam in a L98
Do you have a vortec motor in that thing? That's the cam specs for a 96-99 L31-L30 engine or a b-body LT1 cam.
Last edited by robertfrank; Oct 3, 2008 at 07:09 PM.
TGO Supporter
Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: LT1 Cam in a L98
The F-car LT1 cam specs are (202@.050", 207@.050", .450/.450, 117 LSA) from the info I could find.
Joined: Apr 2004
Posts: 3,001
Likes: 62
From: Salt Lake City, Utah
Car: 1988 camaro "SS"/ 1991 305/T5
Engine: 383 LT1 in progress/LT1TBI 355 soon
Transmission: Probuilt 700R4 3600 stall/ T5
Axle/Gears: Moser axles, 3.42 Eaton Posi
Re: LT1 Cam in a L98
Since I'm guessing that you have an 88 L98 car I would just suggest using 1.6 rockers with the cam you already have. Here's what the specs are for your cam and what they would be with the 1.6's.
10066049 207/213 - .415/.430 117 LSA L98 cam
10066049 210/216 - .443/.459 117 LSA L98 cam
That would give you little extra getup with the 1.6's. It would put you closer to Lt1 cam specs but give you more duration, which sometimes means alittle more power in the top end. But remember if you replace the cam be sure to replace the valve springs while you're at it.
I already have a thread comparing the 2 cams in question but my car has a 305. There might be some good info for you.
https://www.thirdgen.org/forums/tbi/...camshafts.html
10066049 207/213 - .415/.430 117 LSA L98 cam
10066049 210/216 - .443/.459 117 LSA L98 cam
That would give you little extra getup with the 1.6's. It would put you closer to Lt1 cam specs but give you more duration, which sometimes means alittle more power in the top end. But remember if you replace the cam be sure to replace the valve springs while you're at it.
I already have a thread comparing the 2 cams in question but my car has a 305. There might be some good info for you.
https://www.thirdgen.org/forums/tbi/...camshafts.html
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