lt4 hot cam kit
Thread Starter
Member
Joined: Jul 2002
Posts: 352
Likes: 0
From: Paragould AR
Car: 89 Camaro RS
Engine: 355 TBI
Transmission: 700R4
lt4 hot cam kit
Im wanting to put the lt4 hot cam kit in my lo5. will stock vortec heads be allright with this? If not what whould i need too do too them. The kit comes with cam and 1.6 rockers
Senior Member
Joined: Mar 2001
Posts: 868
Likes: 0
From: Randleman,NC,USA
Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
Unless I am mistaken the Vortec heads have the same "stock" valve lift restriction as the TBI engines of around .480". The LT4 hot cam with the 1.6 rockers is .525" which would require having the heads machined and using different springs. You might also be close to the point of pushing the intake valve into the side of the cylinder wall. I forget what that lift number is but I read it on this site.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Your stock TBI computer will absolutely hate that cam, so dont even think about it. Try a ZZ4 cam instead.
Thread
Thread Starter
Forum
Replies
Last Post
Mickeyruder
Engine/Drivetrain/Suspension Parts for Sale
3
Sep 2, 2015 02:45 PM
1988iroc350tpi
Tech / General Engine
8
Aug 14, 2015 07:52 PM