I'm looking to build an engine that is street friendly but will do atleast 13.0s in the 1/4. So the main question is which would be the best way/easiest way to do it? My three block options are 350, 383, and 400. Looking to reuse my TPI but willing to swap to another form of fuel injection IF the TPI is just not going to cut it.

This would be going into a car the would be for 99.9999% street use. But like stated above would like it to be able to do low 13s in the 1/4. Any suggestions would be appreciated.

 

Your link says you have a carbed LG4 305.

Quite frankly, you're much more likely to hit 13's with the LG4 induction on a 400 than you are with any TPI .

Unless you are willing to go nitrous. I've seen an otherwise stock L98 hit 13.0 up at this altitude with nitrous.

 

I used to have the LG4 then I did a TPI/lt1 cam swap. Haven't had much time to play with my web site lately.

Anyway I don't want to use a carb. I want fuel injection that's why I'm going to use TPI or another form of FI.

I want to know which engine I would have to do the least to that would allow me to get in the low 13s while maintaining good streetablility since it will be mostly a daily driver. Possibly even leaving room for a supercharger later down the road. In other words which would most easily get me into the 13s N/A with fuel injection (TPI or other)?

 

Well there is no substitute for cubic inches. But in this case I would recommend a 383 over a 400 because the 400 block was never cast to use a rollercam and the retrofit kits would add considerably to the expense. I would recommend a late model factory roller 350 block with a 383 stroker assembly like the inexpensive eagle cast crank assemblies you see on ebay. There are a few reasons i recommend this combo.

1.) There alot more EFI friendly cams available for that block.
2.) The 383 will accept larger heads and cam while still maintaining good idle quality and vaccum.
3.)It will make more horse power and torque than an equally tame 350 and torque is where its at when movin a streetcar.
Torque is what gives you the cool seat of the pants feel when you stab it on the street.

As far as camshafts go i would recommend something with a duration of 225 to 230 degree at .050 range and an LDA of 112*. this motor can easily handle a roller with up to 230*@.050 without sacraficing drivablity. With the right intake and minor tuning of the ECU that should easily put you in the 13's while still maintaining drivability Provided you have the right drivetrain combination, exhaust, etc. to compliment the engine.

 

Thanks for the advice!

Mark

 

I'm no expert, but I believe the TPI intake and plenum will choke a 383. You can still keep the ecm, wiring, injectors etc, but change the intake to a miniram or stealth ram.