Almost finished...Almost. - ZR-1 Net Registry Forums

Paul Workman · 05-11-2009

My "entry fee" to the FBI is almost at hand (and I can't wait!!). The porting is done, the engine is back together, sans the plenum and TB (set aside for painting).

Below is the 3" system laid out, ready to be fitted in place...

Per Phil's system, the chambered "mufflers (used as resonators in this experiment) will be fitted between the SW "X" pipe and the muffler links. Those chambered mufflers are a full 3" inside diameter with "cheese shreader" walls.

The only part that isn't 100% 3" is the mufflers...They neck down to 2-1/2" going in. (I wonder if that can't be "opened up to 3").

View from the input side...

And from the output side. Note the twin pipes are just under 2" in diameter. 2 x the square root of the individual diameters results in 2-7/8 "equivalent cross sectional area. Considering a Corsa is 2-1/2" in diameter throughout, AND they seem to make good power, I hoping this necking down at the end of the tail pipe system won't be a big detractor. BUT! everything is on slip fittings, so I can play "mix and match" to get it right.

Last but not least, because I had to have some welding done, the plenum had to be painted. After much deliberation, I decided to try silver. So, I "rattle canned" the intake to get a feel for how it will look when done later professionally. For now, it looks pretty good to a blind man on a galloping horse. So, for this season I'll live with a rattle-can job. (Truth be known, it looks waaay better than the greanish-gray my engine paint has become, over the years). See what you think. (I think it will be a LOT easier to keep clean, especially since I live on a dirt road and dust is a never-ending chore, round here!)

Gettin' so close I can taste it!! The exhaust might "follow on" in a week or so, but "fer sher", barring the unexpected, I'm gonna try to get it fired up.

More later.

P.

05-11-2009	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Almost finished...Almost. My "entry fee" to the FBI is almost at hand (and I can't wait!!). The porting is done, the engine is back together, sans the plenum and TB (set aside for painting). Below is the 3" system laid out, ready to be fitted in place... Per Phil's system, the chambered "mufflers (used as resonators in this experiment) will be fitted between the SW "X" pipe and the muffler links. Those chambered mufflers are a full 3" inside diameter with "cheese shreader" walls. The only part that isn't 100% 3" is the mufflers...They neck down to 2-1/2" going in. (I wonder if that can't be "opened up to 3"). View from the input side... And from the output side. Note the twin pipes are just under 2" in diameter. 2 x the square root of the individual diameters results in 2-7/8 "equivalent cross sectional area. Considering a Corsa is 2-1/2" in diameter throughout, AND they seem to make good power, I hoping this necking down at the end of the tail pipe system won't be a big detractor. BUT! everything is on slip fittings, so I can play "mix and match" to get it right. Last but not least, because I had to have some welding done, the plenum had to be painted. After much deliberation, I decided to try silver. So, I "rattle canned" the intake to get a feel for how it will look when done later professionally. For now, it looks pretty good to a blind man on a galloping horse. So, for this season I'll live with a rattle-can job. (Truth be known, it looks waaay better than the greanish-gray my engine paint has become, over the years). See what you think. (I think it will be a LOT easier to keep clean, especially since I live on a dirt road and dust is a never-ending chore, round here!) Gettin' so close I can taste it!! The exhaust might "follow on" in a week or so, but "fer sher", barring the unexpected, I'm gonna try to get it fired up. More later. P.