BLACK ICE

CAN I PUT AN LT1 CAM IN MY TUNED PORT MOTOR AND WILL I NEED TO CHANGE MY LIFTERS ECT? MY MOTOR IS A MAF SETUP IF THAT MAKES ANY DIFFERNCE.

formula2fast

Yes you can use it, as long as your TPI is a roller block...The only modification you will have to make is to tap the dowel pin on the front of the cam in a little bit. But if you are going through the trouble of putting a cam in, get a better cam than an stock LT1. And don't put a used cam in, that is just tacky

FactoryFreak

iTrader: (2)

On a stock tpi I would recommend the LT1 Hot Cam.

formula2fast

You mean an LT4 Hotcam That would be a very good choice for that motor. They perform very well and are still quite drivable.

Beefy89

The LT1 cams dowel extends about .600" from the end of the cam.
You can lightly tap it in so that it only extends about .300". I put a 96 LT1 cam in my L98 a few years ago and the dowel couldnt be tapped in to the desired length, so I had to grind the rest of it off.

Sp0nGa

I stuck the LT4 HotCam in and didnt have to mess with the dowel pin at all. Sure it is longer, but it is not nearly long enough to cause any clearance problems whatsoever.

MTPFI-MAF

Due to machining tolerances I would still check for clearance problems because some cams the extra length has been reported to hit the timing chain cover and cause lots of problems any where from oil leaks to excessive Knock Counts. I am not saying that a lt4 hotcam has this problem just be sure to check because if and when you get into prom burnning trying to dial in your combo with thousands of knock counts a min IMO would be a PITA.

Check, double check, and check again
Better Safe than Sorry
Just my .02

Sp0nGa

That is very true. I guess I should add that the dowel pin didnt stick out farther than the timing gear did so I just left it alone, but like MTPFI-MAF said its always better safe than sorry.

BLACK ICE

Yes it is kinda funny because yesterday I was looking up some info in my tuned port books and they highly recomend the LT4 hot cam they also recomend switching to 1.6 rockers and GM also recomends taping in that pin it aparently is set out that far for use in the Impala SS.

mrr23

been there, done the LT1 cam. i made 20 more hp and tq switching to the ZZ4 cam.

Here is a comparison of the (dyno 14)LT1 cam, ported stock base, stock runners, 86 ECM and 22# injectors versus (dyno 15)ZZ4 cam, Edelbrock base, siamesed SLP runners, 87 ECM and 24# injectors. The peak torque is down because the lt1 cam peaked below 2800 RPM. But past 2800 RPM it has picked up. HP has a gain of 35hp at 5000 RPM. Torque has a gain of 35 ft-lbs at the same 5000 RPM. So, don't just go by peak numbers. Always look at the entire curve.

BLACK ICE

this is a street car so I am only concerned with my low end torque and lower mid-range (I have an automatic).

mrr23

mine was an auto. there won't be any LOSS of torque. i even had a 3300 yank converter. i could rip the tires loose in 1st gear at 20 mph. and kepp spining until 40 mph.

BLACK ICE

So you would recomend upgrading to the ZZ4 cam? What about the LT4 hot cam?

mrr23

even better

BLACK ICE

Should I do 1.5s or 1.6s for rocker arms. I also belive I would need at least an LT1 spring for that also correct?

mrr23

you can get the entire LT4 HOTCAM kit http://sdpc2000.com/cart.asp?action=...d=993&pid=1900

BLACK ICE

I like that price alot better than the dealership price I got from the gmpp catalog!