At least I think: I was looking at some LT4 history at :

http://home.tir.com/~steveher/lt4logo.jpg


I read in the LT1 vs LT4 comparison that an EGR valve was not used in the LT4 intake because: "Overlap leaves EGR redundant". I assume they are referring to the cam, whose LT4 part number is "12551142".

I think this may be interesting for any of us thirdgenners using an aftermarket FI setup that don't have any EGR , or any of us who have wanted and aftermarket FI setup but are hesitant b/c there is no EGR.

I'll try and find the specs. I don't think its the LT4 hotcam though.

 

According the SDPC catalogue:



http://www.sdpc2000.com/cart.asp?act...d=989&pid=8354

"This hydraulic roller camshaft was used in production 1996 LT4 Corvettes. For use with 1.6 Rocker.

Mild camshaft with smooth idle can be used in all 1986-99 305-350 engines originally equipped with a hydraulic roller camshaft. It can also easily be used in non-roller 1986-99 305-350 enignes when used with lifter kit 12371042.

Works with stock computer on most computer controlled engines. This is an excellent power adder for 1987-95 TBI pick-ups and TBI/TPI cars. Can also be used in non-computer controlled engines."


I'm gettin kind of excited!

Might mean that I can run an LT1 intake and and LT4 cam and not need to fu(k w/ EGR emissions/inspection

 

Not exactly, its still not technically legal even though the parts 'work' and 'fit'.

As for overlap negating EGR, kinda depends on if the engine is setup right as to if you can get away with no EGR. Can be done though.

 

So you think there is more involved than just swapping in an lt4 cam?

I don't know.

Been searching for anyone who has tried it.