LT1 To LT4 Conversion???
Thread Starter
Pro
Joined: Apr 2002
Posts: 605
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From: Outer Banks NC FIRST IN FLIGHT
LT1 To LT4 Conversion???
Has anyone on the forum ever purchased and installed the LT1 to LT4 conversion kit from GM performance? If so I would like to know the diffulculty of the install and also what the performance gains you achived were, if any. Also was it worth the $$$$$.
Thanks. :steering:
Thanks. :steering:
Team Owner
Joined: Sep 2001
Posts: 62,099
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: LT1 To LT4 Conversion??? (Kizmo)
You dont need that stuff.
Just port your intake manifold, port your heads, and add a hotcam kit, and youll be alot faster than any LT4.
Just port your intake manifold, port your heads, and add a hotcam kit, and youll be alot faster than any LT4.
Drifting
Joined: Apr 2000
Posts: 1,803
Likes: 1
From: PA
Re: LT1 To LT4 Conversion??? (vader86)
Porting an LT1 intake is a total waste of time. A professional intake port job adds 3-5 HP to a built 435 HP LT1 setup. Headers, cam, head porting and oversize valves, matched chip and 52mm TB will give 425HP with long tubes or 400 HP with EPA shorties. Run with 405 HP Z06's. Skip the 335HP LT4 upgrade.
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Pro
Joined: Apr 2002
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From: Outer Banks NC FIRST IN FLIGHT
Re: LT1 To LT4 Conversion??? (Rick93Z07)
Porting an LT1 intake is a total waste of time. A professional intake port job adds 3-5 HP to a built 435 HP LT1 setup. Headers, cam, head porting and oversize valves, matched chip and 52mm TB will give 425HP with long tubes or 400 HP with EPA shorties. Run with 405 HP Z06's. Skip the 335HP LT4 upgrade.
Le Mans Master
Joined: Oct 2000
Posts: 5,086
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From: Northern tip of Virginia
Re: LT1 To LT4 Conversion??? (Kizmo)
Porting an LT1 intake is a total waste of time. A professional intake port job adds 3-5 HP to a built 435 HP LT1 setup. Headers, cam, head porting and oversize valves, matched chip and 52mm TB will give 425HP with long tubes or 400 HP with EPA shorties. Run with 405 HP Z06's. Skip the 335HP LT4 upgrade.
What type cost are we talking about with the above mentioned mods???
What type cost are we talking about with the above mentioned mods???
top end "kits"go for $3000 to $4000 for parts alone.
here is a link to VETTE DOCTORS..(see left column)...
most packages of this type are priced simarlarly
http://www.thevettedoctors.com/htdocs/c4-rx.shtml
Instructor
Joined: Feb 2002
Posts: 173
Likes: 0
From: Honolulu HI
Re: LT1 To LT4 Conversion??? (Kizmo)
Has anyone on the forum ever purchased and installed the LT1 to LT4 conversion kit from GM performance? If so I would like to know the diffulculty of the install and also what the performance gains you achived were, if any. Also was it worth the $$$$$.
Thanks. :steering:
Thanks. :steering:
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Thread Starter
Pro
Joined: Apr 2002
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From: Outer Banks NC FIRST IN FLIGHT
Re: LT1 To LT4 Conversion??? (Phil-tha-Rush)
I can get the entire LT1 - LT4 conversion kit with all the parts needed, minus the timing chain for $2,000.00 from GM performance, ready to fit. Compared to this it seems like everything else is a rip off.
Instructor
Joined: Feb 2003
Posts: 221
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From: T.Dot ON
Re: LT1 To LT4 Conversion??? (Kizmo)
To put those heads and intake 9assuming thats with the LT4 roller rockers too) you will definitely see a gain. But in my opinion not worth $2000. Id guess maybe around 20 -25 hp. The LT4 cam was revised to take advantage of the better flowing heads too. If you are planning to do some serious modifications in the future ie. Ported heads/cam/stroker/etc, then go with the LT4s, they flow considerably better than the Lt1s when race ported. What you are probably comparing the LT4 conversion too is a heads/cam poackage. Remember a heads and cam package gives you many more options as to how much power you want. Although it is more expensive, you can gain an easy 50-100 hp and even more depending on how aggresive of a cam and porting job is done. :cheers:
Team Owner
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
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Re: LT1 To LT4 Conversion??? (Rick93Z07)
Porting an LT1 intake is a total waste of time. A professional intake port job adds 3-5 HP to a built 435 HP LT1 setup. Headers, cam, head porting and oversize valves, matched chip and 52mm TB will give 425HP with long tubes or 400 HP with EPA shorties. Run with 405 HP Z06's. Skip the 335HP LT4 upgrade.
425 HP :eek: :eek:
Flywheel or rear wheel?????????
WOW , I've only got 360 RWHP,
I must have missed something. :confused:
