Can LT4 springs handle the lift of a C305 and 1.6 RR's?
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Joined: Apr 2003
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Can LT4 springs handle the lift of a C305 and 1.6 RR's?
I posted this on another forum but hopefully the LT1 guru's here can have some input here:
Yes I know its better to get other springs but I have some lt4 springs sitting in the garage. Can they handle the lift or am I forced to buy some beefier springs? If so can someone recommend some valve springs that will use the stock seats? Thanks.
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Joined: Apr 2003
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Ok, answer is no, too much lift. Anyone know any aftermarket valve springs that can handle the lift of a C305 with 1.6 Roller rockers and still use the stock spring seats? I don't want to pull the heads yet. Thanks.
Joined: Feb 2001
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
I take it you checked out over on www.camaroz28.com. There are a lot of guys running that cam on untouched heads. They should shed some light.
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From: Idaho Falls
Car: 82 Trans Am
Engine: LTX
Transmission: T56
Axle/Gears: 3.42 strengthed 7.5 inch
go to CZ28.com and check out combination motorsports they sell springs that fit the stock pockets but will handle cams with alot more lift than the CC305
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Thread Starter
Supreme Member
Joined: Apr 2003
Posts: 3,563
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
I believe its .540 unless comp cams rates thier cams using 1.6, if thats the case then its .510. Im positive I can't use the lt4 springs. But I don't want to pull the heads and have new seats made.
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From: Idaho Falls
Car: 82 Trans Am
Engine: LTX
Transmission: T56
Axle/Gears: 3.42 strengthed 7.5 inch
Usually The LT4 cam and heads swap will give you somewhere in the range of 340-350 rwhp..
the cam swap alone will give you 320-330rwhp.. head to the LT1 section of cz28.com and search for LT4 Dyno results that should give you an idea of the ballpark, save for a few freakish posts..
the cam swap alone will give you 320-330rwhp.. head to the LT1 section of cz28.com and search for LT4 Dyno results that should give you an idea of the ballpark, save for a few freakish posts..
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From: Angleton, TX
Car: '92 RS
Originally posted by pasky
Just scored a C306
.
Just scored a C306
. 
Thread Starter
Supreme Member
Joined: Apr 2003
Posts: 3,563
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Originally posted by J's T/A
Your in TX, go score some heads from Lloyd now, tell him Julian sent ya..
Your in TX, go score some heads from Lloyd now, tell him Julian sent ya..
. 
Thread Starter
Supreme Member
Joined: Apr 2003
Posts: 3,563
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
It got sold, reason why I got a CC 306 
. Check the classifieds on Camaroz28.com. Tons of big cams going fairly cheap.
. Check the classifieds on Camaroz28.com. Tons of big cams going fairly cheap. Thread Starter
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Joined: Apr 2003
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Just picked up a set of springs, locks, and retainers from combination motorsports that can handle up to .600 lift using the stock lt1 spring seats. Only $121 shipped to my door. Spoke with Brian, great company and thanks for the referral.
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