Serious Engine Building

[JBrady]

Here is a link to Larry Widmer's Endyn site. Larry if controversial but does outstanding work and documents the hows and whys. He specializes in Honda's but think of this as half our V8s. He addresses so many things that you just need to start reading and looking at the pictures as you begin to digest just some of what he is telling us for FREE.

http://www.theoldone.com/articles/Larryscivic/Larrys_Civic.htm

Here is just ONE of the hundreds if not thousands of points of detail. He polishes the valve springs where they meet the keepers. This reduces friction and therefore heat and fatigue.





Here he shows the exhaust ports after EXTENSIVE work including welding to change the shape and then CNC porting. Even so he offers the picture to show there are still areas that he does NOT touch!!! Hogging out a port is NOT the way to make the best port. Understanding the goal and understanding the port is critical.




Engine in the Endyn dyno room. Notice the attention to detail everywhere. Notice the intake air is actually from a controlled sealed chamber that measures the density/pressure, temperature and humidity of the air before it gets to the engine. All important to know when developing and comparing data.

 

[JBrady]

Did I mention this is his personal engine for his daily driver 1989 Civic?

Engine dynos were 296hp @ 8400rpm and 197lb/tq @ 6500rpm. Intial dynojet numbers were 241rwhp and 160rwtq. This is a 2100cc engine. He reports gas mileage in the high 20s.

 

[JBrady]

Most recent dynojet numbers 272rwhp 186rwtq

This compares favorably with the 310+hp and 200tq measured on an identical engine he built after this one tested on the engine dyno. If you double this engine to a 4.2 liter V8 you would have a 600hp naturally aspirated street engine that passes emissions and gets decent fuel economy. Whoah!

Larry states this is on PUMP gas.

Also note the power at 3000rpm. 80rwhp and 140rwtq. Again, double this for V8 comparison and you get 160rwhp and 280rwtq again at ONLY 3000rpm. This is an example of what proper engineering and attention to detail can produce. A racing engine that will work in a street application.

 

[shoryu]

If someone put together a VTEC like system for the 1UZ, it would definitely have a lot more pep in its step. I think that's how this Civic engine is so flexible. Well, that and flow capabilities of the Honda B-series head. My kingdom for a better flowing 1UZ head.