the lift on the lt4 standard cam is .476/.479 is that @ 1.6:1, or 1.5:1.. I have my engine opti out and intake manifold off along with rockers (during 1.7 conversion) my friend will give me a lt4 standard cam for free.. just wondering if thats the lift with 1.5, if not then if its the 1.6 lift max lift with 1.7s would be around .505/.510 which would be in the perfect flow range for the stock heads which flow peak around there.... thus i should make decent power and nice torque.

 

Those numbers are with 1.6 rockers, since production LT4 engines came with 1.6 rockers, not 1.5s. Specs for the production LT4 cam:

I203/E210 I.476"/E.479" 115LS.

 

cool so it will be right in the prime flow area of those heads

 

You may have misunderstood. The .476"/.479" numbers are WITH 1.6 rockers. Not the .505"/.510" like you had hoped...

 

yes it will be .505/.508.... i divided by 1.6 then multi by 1.7 got the numbers... i know what u ment it being 1.6 #s the 1.5 # are like .44x. should also put out a lil more power and torque...

 

Ah...then I read wrong. I didn't see that you had intended on using 1.7 rockers. Kudos.

 

Yeppers. going for the sleeper thing, plus its free so why not use it ya know what harm can it do... i doubt i will lose power with it... im hoping for 315hp/340ish tq.

 

Honestly I put a ZZ3 cam in my Caprice and it is asumed stock by everyone I do not specifically tell it is changed, and that is bigger than the production LT4 cam, after doing the swap and driving it for a year I would say that even in a b-body which comes with a smaller than f-body cam the ZZ3 is the absolute smallest cam worth the effort. Even if LT4 cam is free I would recommend a ZZ3 or 227(210/224 crane) both will make more power than the LT4 and are still mistakable for stock. The 227 has made some wickedly fast cars too both b and f-body.

 

where can i get a zz3 cam, and what are the specs on it... i got a 224/236 i bought but i dont wanna use it so im not going to. Also is the zz3 the same as the zz4 because my friend had a zz4 cam in his hsr motor and that thing loped... im not looking for a lopey idle thats why im not using the xe224/236.

 

The ZZ3 cam is a readily available GM performance parts piece pn 10185071 , think gmpartsdirect(good for looking stuff up not for buying) lists it at $165 and it needs a small amount of machining($20) so the opti fits right. Specs are 208/214 .474/.510 with 1.5s on a 112. Thing is so well mannered that I used to tow a small boat with it backed by a 1650 stall and 2.93s outback also keep in mind my car is about 4200 without me. Even then it was stock mannered till I get on it then it pulls more in the midrange and to a higher rpm than the stock cam did. I do plan on swapping it out but not till winter. If you want I could posted a wanted for you on the b-body board, obviously a mild cam like this is more popular over there. Desktop Dyno says about 360/360 for this thing if the rest of the car is in order you know good intake and exhaust, I would guess your SLPs are shorties so I don't see you getting the full 360 but you get the idea.

I am running a very basic intake(involves 3" pvc and cutting a hole in the airfilter box) with the stock small b-body MAF, stock exhaust manifolds, 87 octane mailorder tuning and have a heavy drivetrain and still put down 260 to the tires, which should be 320 or so flywheel. You have better intake and exhaust and a lighter drivetrain so your results will be better.

 

Don't bother with the stock LT4 cam, it won't be worth it and you will probably see ZERO gains.

Stock LT1: 205/207 477I/490E w/1.6

Stock LT4: 203/210 476I/479E w/1.6

LT4Hotcam: 218/228 525I/525E w/1.6

If you are going to go through the effort of doing a cam, at the very least I'd go with a Hotcam.

 

well i have a crane 2031 i could machine to work in my lt1. its specs are 208/214 112lsa .438/.452 @1.5rr. I got 1.7rrs i would use but u get the idea... worth putting the cam in?