LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old Feb 27, 2011 | 12:49 PM
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my motor has a solid roller in it and im looking to step down a little since iti s a 265 273 @ .050 id like to step down to something like a 250ish cam. can i use any old SBC cam? or does it need to be LT1 specific?
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Old Feb 27, 2011 | 03:42 PM
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I have a Joe O spec'd LT1 billet erson solid roller cam for sale if you are interested. The specs are
257 266 @.050 106lsa .640 lift intake and exhaust with 1.6 rockers. I have the exact figures if you are interested. The cam was installed but never used as I went a different route with the engine. $200 shipped.

T oanswer your question. It will need to be LT1 specific cam as I believe the front of the cam is a little different.
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Old Feb 27, 2011 | 05:09 PM
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From: Jackstandican
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You can use a traditional SBC roller cam. You'll just have to get it machined for the optispark. The cam I have is a mild Cam Motion cam. Specs are 248/250 .650/.610 on a 112 lsa.
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Old Feb 27, 2011 | 06:09 PM
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Originally Posted by Nostang
I have a Joe O spec'd LT1 billet erson solid roller cam for sale if you are interested. The specs are
257 266 @.050 106lsa .640 lift intake and exhaust with 1.6 rockers. I have the exact figures if you are interested. The cam was installed but never used as I went a different route with the engine. $200 shipped.

T oanswer your question. It will need to be LT1 specific cam as I believe the front of the cam is a little different.
those specs look very good for a strong 383
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Old Feb 27, 2011 | 08:13 PM
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here is the rest of the combo.....

383
AFR 210 heads
13:1 compression
srp pistons
eagle H beams
eagle forged crank

th400 stall TBD
3.25 gears
325-50-15 mt et street radials

80% street car
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Old Feb 27, 2011 | 08:17 PM
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thats part of the reason for stepping down in cam the 265 273 @ .050 cam is to big for what i want to do with the car. that and the 2 bolt block even with ARP bolts i don't think will like to be shifted 7500 + like the heads and cam will want.
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Old Feb 27, 2011 | 08:41 PM
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newbie question i guess, whats the advantages to going solid roller?
valvetrain? do the lifters collapse or something?
if so i thought theyre were companies out there making stronger parts for high revs?
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Old Feb 27, 2011 | 08:48 PM
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what rockers are you solid roller guys using ??
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Old Feb 27, 2011 | 08:56 PM
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Shaft here
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Old Feb 27, 2011 | 09:01 PM
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mine has stud mount 1.5 with a girdle
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Old Feb 27, 2011 | 09:09 PM
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Originally Posted by SS RRR
You can use a traditional SBC roller cam. You'll just have to get it machined for the optispark. The cam I have is a mild Cam Motion cam. Specs are 248/250 .650/.610 on a 112 lsa.
im not running an opti but still have the water pump does that matter? i run a carb intake and distributor
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Old Feb 27, 2011 | 09:24 PM
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Originally Posted by brngrhd
im not running an opti but still have the water pump does that matter?
Not at all. In that case all you need is a roller cam (cam that uses a cam plate to stay in place).

Originally Posted by lordrazo
what rockers are you solid roller guys using ??
Stud mount. IMO I don't think shaft mount is necessary unless going over 7000rpm.

Originally Posted by lifeisgood
newbie question i guess, whats the advantages to going solid roller?
valvetrain? do the lifters collapse or something?
if so i thought theyre were companies out there making stronger parts for high revs?
Able to run a far more aggressive lobe and the valvetrain will remain stable.

Last edited by SS RRR; Feb 28, 2011 at 02:22 AM.
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Old Feb 27, 2011 | 10:04 PM
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Originally Posted by brngrhd
here is the rest of the combo.....

383
AFR 210 heads
13:1 compression
srp pistons
eagle H beams
eagle forged crank

th400 stall TBD
3.25 gears
325-50-15 mt et street radials

80% street car
Reply
Old Feb 28, 2011 | 10:07 AM
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The reason for the gear is it was going to be a boosted sbc now it is a lt1 later it will be a boosted ls
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Old Feb 28, 2011 | 10:39 AM
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Originally Posted by brngrhd
my motor has a solid roller in it and im looking to step down a little since iti s a 265 273 @ .050 id like to step down to something like a 250ish cam. can i use any old SBC cam? or does it need to be LT1 specific?
The front of the cam needs to be back cut for the retaining plate in on the block. You cant use a cam button on these motors. So I'd say no.

Originally Posted by Wicked94Z
those specs look very good for a strong 383
Yep....that cam is in the vicinity of mine......little lower on lift though

Originally Posted by brngrhd
thats part of the reason for stepping down in cam the 265 273 @ .050 cam is to big for what i want to do with the car. that and the 2 bolt block even with ARP bolts i don't think will like to be shifted 7500 + like the heads and cam will want.
yea even that other cam will go pretty high........im taking mine to 8000 with out any issue but i converted to billet 4 bolt caps.....

Originally Posted by lordrazo
what rockers are you solid roller guys using ??
Jesel 1.6 Shaft Mounts

Originally Posted by brngrhd
The reason for the gear is it was going to be a boosted sbc now it is a lt1 later it will be a boosted ls
Whats in it for a rear end??
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Old Feb 28, 2011 | 11:17 AM
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3.25 sounds like a 9" gear for sure... I'd be swapping that out in a hurry
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Old Feb 28, 2011 | 11:27 AM
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Originally Posted by brngrhd
my motor has a solid roller in it and im looking to step down a little since iti s a 265 273 @ .050 id like to step down to something like a 250ish cam. can i use any old SBC cam? or does it need to be LT1 specific?
If you're looking to buy a LT1 specific solid-roller, I've got one for sale thats pretty close to what your looking for. Specs are 248/255 @.050, .640/.652 lift, 106 lsa. PM me for more info if you're interested.
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