Lt1 cam swap - Third Generation F-Body Message Boards

ericjon262 · 10-13-2009, 05:50 AM

I'm thinking about doing the LT1 cam swap, along with swaping to 305 TPI heads, a new intake, headers/ exhaust, and EBL.

I have two questions.

1. can I swap the cam without dropping the oil pan? I thought I read somewhere that it can be done, but noe I can't find that info.

2. how much more power (ballpark) should I be looking at?

Thanks-

Eric

tazextreme3 · 10-13-2009, 08:10 AM

Read here for a complete swap thread (LT1 cam digest (the ultimate one))
You don't have to drop the oil pan to get the timing cover off. Just loosen it enough to get the timing cover on and off.
The cam will probably add +-25 hp with a good tune.

ericjon262 · 10-13-2009, 11:49 AM

Quote:

Originally Posted by tazextreme3

Read here for a complete swap thread (LT1 cam digest (the ultimate one))
You don't have to drop the oil pan to get the timing cover off. Just loosen it enough to get the timing cover on and off.
The cam will probably add +-25 hp with a good tune.

I've read it, probably 2-3 times, I know just the cam is worth 25 hp, but what about the cam and heads?

Also, is there any difference between the L03 and Lb9 rotating assembalies the same?

tazextreme3 · 10-13-2009, 12:11 PM

Cam and heads, I believe would put you around stock LB9 power (220ish? maybe a little more from the cam). Try to go with a set of vortecs if you can.
The bottom end of the LO3 and LB9 are the same. I believe the only differences are the heads, cam and induction.

thomas1976 · 10-13-2009, 06:45 PM

The oil pan has to be lowered at least 1", to get the timing cover out and back in properly.I used 2 longer screws in the fron of the pan and losened all around, dont forget to empty the oil first. Used it to keep the roller lifters and lifters soaked.

Dont know about 081's, but LO3 with stock heads, lt1cam, full exhaust, anough fuel, EBL (tuned) and CAI should be around 230-250fwhp.

ericjon262 · 10-13-2009, 09:35 PM

Quote:

Originally Posted by thomas1976

Dont know about 081's, but LO3 with stock heads, lt1cam, full exhaust, anough fuel, EBL (tuned) and CAI should be around 230-250fwhp.

Why not 081's?

ShiftyCapone · 10-13-2009, 09:37 PM

Quote:

Originally Posted by ericjon262

I'm thinking about doing the LT1 cam swap, along with swaping to 305 TPI heads, a new intake, headers/ exhaust, and EBL.

I have two questions.

1. can I swap the cam without dropping the oil pan? I thought I read somewhere that it can be done, but noe I can't find that info.

2. how much more power (ballpark) should I be looking at?

Thanks-

Eric

1. Yes you can swap the cam without removing the oil pan. The timing chain cover will up and out, however, it will be impossible to put it back in without trimming the ears off the inside flange or or lowering the oil pan. i recomend the later. It is laborious but you can lower the pan just a touch (you have an inch or two before you hit the k member) which is enough to get the timing cover back on.

2. Assuming you get your tune dialed in you will see on average around 210 to 220 rwhp. give or take. Some have reported higher many have reported lower. All comes down to the tune.

ericjon262 · 10-13-2009, 09:49 PM

thanks, so any reason not to use the 081 heads over the factory swirls?

edit: I misread your post thomas1976, I though you said not to use them.

johnny090881 · 10-13-2009, 10:16 PM

Alright, I have a tpi setup that I'm swapping out for my tbi and I'm going to put a new cam 224/234with new springs and valve spring kit, stock heads. Now I want to purchase a set of 1.6 RR's. I already have headers straight pipped flowmaster setup with a t-5 manual transmission. How much horespower do you guys think I can push out.

ShiftyCapone · 10-16-2009, 02:31 PM

Quote:

Originally Posted by johnny090881

Alright, I have a tpi setup that I'm swapping out for my tbi and I'm going to put a new cam 224/234with new springs and valve spring kit, stock heads. Now I want to purchase a set of 1.6 RR's. I already have headers straight pipped flowmaster setup with a t-5 manual transmission. How much horespower do you guys think I can push out.

Without proper ECM tuning you will make around 100hp. With proper tuning you could be around 250 or so.