ZR1 motor?
 

Wondering if anyone has put this in their lt1 fbody? I never heard about it until I raced my friend in his uncle's ZR1 vette. I didn't think I would lose that because I had my dad's 68 camaro/350 with a cam, decent heads and full exhaust. They are a DOHC 350 which makes about 400 horses stock and that was back in the early 90's.

Here is a website on more info about them.

http://www.mathewscollection.com/cor...tte_91_ZR1.htm

I imagine they are crazy expensive if you can even find them anymore, but I think it would be sweet to have in my TA.

Its called the LT5. Its a high strung, tempremental engine, that became seriously outdated when GM went to the Gen 3/LSx design. Replacement parts are near impossible to get, there is very little in the way of aftermarket performance parts. If you want 400HP from a factory motor, swap in an LS2 and have an almost endless list of performance parts available for it.

Or, go for a mild head port and matching cam, and make the same HP out of your LT1 at about 1/10th the cost.

Tim Allen had GM put one in his I believe 96 Impala rumor has it all said and done they had to move the firewall they did some performance work and it cost him six figures.

Like Fred said even very mild heads and cam will get you a 400hp crank HP LT1

As stated above it's not worth doing. I would also expect that the wide head design would take more than a shoehorn to get it to fit.

It is not important but did the LT5 use the optispark or did it use something else due to the higher RPMs the LT5 ran?

It is not really related to the LT1/LT4/L99 series of engines as such it would not use their unique distributor.

The "LT" thing confuses a lot of folks, but I believe the closest thing to a relation between these motors is both were put in Vettes.

Used something else (Crank Trigger)


In a nutshell:

The LT5 has an electronic ignition consisting of coil packs, electronic ingnition control module, camshaft sensor crankshaft reflector ring, crankshaft sensor and th ECM. The coil pack consists of four separate, ignition coils.

The crankshaft magnetic pickup sensor provides timing information to the ecm. The camshaft sensor provides the correct firing sequence, and the crankshaft sensor signals to trigger each coil at teh proper time.