L-48 keeping up to a LT-1

[wipeout48]

l-48 keeping up to a lt-1

Hi,

My brother has a 1978 trans-am real nice car. He says that he has the 1970 lt-1 370 hp 350 in his car. The other day we were side by side at a red light well you know what happend then. My 77 corvette kept up to his car, actually im sure that once I fix up my suspension im gonna smoke him.

My point is that I had a look at his engine although I did not get a chance to see the block # it does have the aluminum holley intake but it does not have the holley carb but a rochester instead. Could it be that its is a lt-1 and that the carb got switched or is it a different engine.

He's also complaining that its not running correctly. I helped him time it and tune his carb so that his car would run decent. But he is fixated on the fact that his engine has to be timed a certain way.

I told him that his engine is like any other and things like the timing chain get stretched and cams get worn and so on.

Anybody know the correct timing degree for a 70 lt-1 or am I doing it correctly by doing it by ear.

Just felt like ranting... .heheheeheh

 

[wipeout48]

WHat i mean is anybody know what the timing should be at and what rpm the engine should be reving at.

 

[69vettester]

Wipeout,
A general timming setup for any small block is around 8-14 initial adv. at idle(900rpm's) and 35-38adv. all in at around 3000rpms. use the lower numbers to get the car running good, then fine tune the advance curve from there, until you feel its optimal.
If you have one, Be sure to have your vacuum advance plugged when tuning, and connected when testing. An optimal, tuned for performance, small block motor would be timed where it runs in all ranges at highest advance with no detonation , on 91octane pump gas. My 2centavos..
Hope this helps..
Tom

PS.., how your particular motor develops power,After its optimal tuned, is determined by the cam profile, head configuration ect. If you dont know what kind of power your motor has, and your "really curious" about what youve got, A series of dyno runs, is the best way to find out what your motors doing.

 

[Last Ride]

Wasn't the original LT1 a 327?

 

[Mad-Mic]

i'm sure the original LT1 came out in 70. i think the production run was 70-72.

don't quote me on that.

 

[LIRacer]

The LT-1 was a 350 CID(a stroked Z/28 302) offered from 70 thru 72 however, there seemed to be '69 dealer installed LT-1 option. Anyone have any info on that?