ok guys i want to stick with fuel injection
and would like to know would i be better off to get a 350 with a HSR and get all the things to make it run ex. heads,cam,rods,piston,ect... or should i get an LT1 whith some bolt ons . also should i go with a manual trans or stich with my 700r4 and get a shift kit for it?

my budget is roughly 3,000

 

I like my LT1, and if you can find it....get a 6-speed I couldn't get over how hard it pulls with it and the 3.42 gears. Nice thing about the LT1 is if you get a 94+ you can program the PCM right in the car without any chip burning.

 

You are typically going to spend a lot more to get the regular sbc to run with the LT1, the power potential is probably beyond what you'd like to do on the street anyway, it runs awesome and drives extremely nice and smooth in a thirdgen. I wouldnt reccomend using a 700R4 behind one it just isnt half as nice as a 4L60E, and the T56 just becomes icing on the cake i've built and driven LT1 thirdgens with the 700R4, 4L60E, and T56. with a 3000 budget you should be able to complete a LT1 / T56 swap but you arent going to be able to get too extravagant with it on that budget. Hopefully you already have headers and an exhaust.

 

 

well i have a full 3 inch system besides the headers and a friend of mine has hooker super comps or somethingl iek that with y pipe and all that he will sell me for 100 so i should be in good shape. what do you think a LT1/T56 swap would get me in the 1/4 mile. cuz i know a gut that has a lt1/t56 combo with 4 grand of head work and a nice big cam and he is running ver low 12's i pulled off a 14.8 with my 305

 

With 4k in headwork, he either got ripped off, or well he still got ripped off, that and his combination is mismatched or has something seriously wrong, most ported stock headed LT1 cars are in the 11's NA, and if you try hard enough you can put yourself into the 11's without even porting the heads, NA.

 

Is gas an issue? There should be a big difference there.

 

I'm running my LT1 on 89 right now, doesn't seem to be degrading the performance, and haven't heard any pinging either. Since it's stock, I've talked to a couple of people who said 89 will work fine in it, but when the modding starts, 93 is what will need to be run.

 

so what do you think a stock LT1 in a thirgen will run in the 1/4 mile. roughly i know its hard to tell but just going off the top of your hea what would your estimate be?

 

I'm gonna take a stab and say mid 13's, I know they will run mid 8's in the 1/8

 

WOW He could have built a 383 lt1 for what he got taken for on the heads.

You wont have any trouble catching mid/low 13s with a good hook and t56. Some people over at cz28.com run 12s with bolt ons. with that said i wouldnt be afraid to spray 100-150 hp wet shot at it to catch mid/low 11s. These motors actualy respond realy well to nos. while you have it out why not throw a lt4 hot cam kit into it. they are cheap and realitivly easy to find.

 

if i get the lt4 hot cam will i need to get my heads flow tested, ported,and reworked or will the untoched stock heads still allow the engine to perform???

 

untouched lt1 heads will allow the cc306 to still perform and lt4 hotcam is much smaller so yes you can use a stock headed lt1 with a hot cam. Its been done alot actualy.

 

I would say watch changing the cam unless you plan on rebuilding the motor.

There are a lot of guys over on camaroz28.com that have thrown a main bearing after a cam change.

(there are also a lot who haven't)


I am also in the middle of an LT1/T56 swap in my 90 Formula.

The potential is there to run 12s with just a mild cam (like the hot cam, although that is not the best choice.) I have decided to be a bit more conservative with my 120k mile long block and I'm just staying stock and maybe using a bit of nitrous when I get bored.

 

so with a lt4 hotcam a 125 shot of nitrous and tracion bars and subframe connectors do you think i would be somewhere in the low 12's? also with that stuf done would i have to get a 12 bolt or 9" rear? im also planning on swapping my 3.42 gears for some 3.73's

 

3.73 is a good place to start. I run a 3.73 10 bolt zexel rear and its held up so far. However a 9inch is in my future plans when the 10 grenades. The cam swap should get you into 12s and the nitro should get you 11s. Provided your doing everything correctly.(shifting,hooking)

I wouldnt worry about the lt4 cam swap itself spinning a main. normaly its because it has gotten dirt inside the engine during a swap. A clean swap is always imperative. The cc306 on the otherhand has been known to spin a main or two if the driver over revs it like its new. 6400rpms is the most i would ever consider taking the lt1 stock bottom.