In Depth Look at the LT1 Pushrod V8

[dwightlooi]

Here's an in depth presentation on the LT1 Pushrod V8 by its Chief Engineer Tadge Juechter.

http://media.gm.com/dld/content/Pages/presskits/us/en/Chevrolet/gen5/_jcr_content/rightpar/sectioncontainer_1/par/download/file.res/LT1%20presentation%2024OC12a.pdf

This is an official GM press kit distribution; all relevant copyrights and fair usage etiquette apply. In short, the information is public domain and you may quote it or share it. But, you may not claim it as your own, you may not modify it or distort the information, and you may not use it to sell a commercial product.

Edited May 1, 2013 by dwightlooi

[ZL-1]

[riviera74]

I wonder how long it will take for the LT1 to reach other vehicles that take a V8. I also wonder if they will create an LT1 derivative for a V6 application. Nothing against the 3.6 HF V6, but a V6 derivative of the LT1 could be the best V6 (especially in the torque department) since the Buick V8-derived 3800 V6.

[G. David Felt]

Seems that there could be far more variations on this engine with amazing gains and like Riviera states, I wonder why they do not do a v6 or even a v4 off this engine. We know you have build a quality V4 engine with over 300HP 300lbs Torque with no Turbo, I would think this would be more efficient than the weak version we have of 4 bangers with turbos.

[loki]

Seems that there could be far more variations on this engine with amazing gains and like Riviera states, I wonder why they do not do a v6 or even a v4 off this engine. We know you have build a quality V4 engine with over 300HP 300lbs Torque with no Turbo, I would think this would be more efficient than the weak version we have of 4 bangers with turbos.

that would be a 3.1L v4... for a 'truck' engine, sure.... but a slant inline would be better, and dwight has proposed something like that, right? i do think a ~200 hp 4 cyl CIB engine would be interesting for a modern s-10

a ~4.7L v6.. lets see how the 4.3L LT derived truck engine is first.

[G. David Felt]

Seems that there could be far more variations on this engine with amazing gains and like Riviera states, I wonder why they do not do a v6 or even a v4 off this engine. We know you have build a quality V4 engine with over 300HP 300lbs Torque with no Turbo, I would think this would be more efficient than the weak version we have of 4 bangers with turbos.

that would be a 3.1L v4... for a 'truck' engine, sure.... but a slant inline would be better, and dwight has proposed something like that, right? i do think a ~200 hp 4 cyl CIB engine would be interesting for a modern s-10

a ~4.7L v6.. lets see how the 4.3L LT derived truck engine is first.

My thinking on this is due to the wonderful V4 engine that Katech made based on the Corvette V8 engine and that Motus Uses for their new American Made motorcycle.

http://www.katechengines.com/engineering/katech-v4/

Sweet options for the 3 V4 engines available. Base is 165hp, then 220hp and top end model is a v4 with 346hp.Spome sweet crate motors.

[dwightlooi]

They could have used the 103.25mm pistons and 92mm crank throw in the truck V6. This would have yielded a 4.7 liter displacement and about 340 hp / 340 lb-ft. The compression ratio of 11.5:1 and the "premium recommended / not required" gasoline diet however probably won't be the best choice for a truck engine. A relatively peaky tune with torque peaking in the high 4000s and power peaking at about 6 grand probably won't be ideal either. I'll gladly lose 30 hp and 10 b-ft to move the torque peak down 1000 rpm and go to an 87 octane recommendation.