ok so im getting ready to upgrade my 94 trans am to a ls1. im gonna continue running my lt1 until after i buy the ls1 and upgrade/rebuild it. i have a few questions.... i have read that using the 5.3(ls4 i think it is??) heads, cam, and intake would do real good in adding power.is this right? and i have a spare 5.3 engine from a 2001 tahoe are any of these the same parts?
Please consider whitelisting my site in your ad blocker. If you must keep it running here, please support this endeavor and select a support plan - which starts at only $0.16 cents per day. I'm not asking for much. I just need a little help. Thank you. Click here to select a support plan.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
questions about ls1 upgrade
- Thread starter itz tearz
- Start date
pepsiaddict
New member
- Joined
- Feb 2, 2011
- Messages
- 10
- Reaction score
- 0
- Points
- 0
The Tahoe 5.3L engine is the LM7. Iron block, #706 aluminum heads with 61cc combustion chambers, 205 cc intake ports, and the small 1.89" intake valves. The cam is a 191 / 190 duration, 0.457 / 0.466 lift, 114 LSA.
The LS4 is the FWD version. It has the desirable #243 heads, or the newer but identical #799 heads. These flow way better, have more efficient combustion chambers, 210 cc intake ports, 2.00" intake valves, 64.5 cc.
The worst LS1 cam was bigger than the LM7 cam, forget the LS4 cam.
The LM7 heads respond well to cnc porting, and the bump in compression you get from putting them on an Ls1 is okay with a healthy cam, premium gas, and a custom dyno-tune.
The LS4 is the FWD version. It has the desirable #243 heads, or the newer but identical #799 heads. These flow way better, have more efficient combustion chambers, 210 cc intake ports, 2.00" intake valves, 64.5 cc.
The worst LS1 cam was bigger than the LM7 cam, forget the LS4 cam.
The LM7 heads respond well to cnc porting, and the bump in compression you get from putting them on an Ls1 is okay with a healthy cam, premium gas, and a custom dyno-tune.