Thread: Girdle removal and a NOS motor

Do you guys recommend keeping the girdle for strengtht, on a DE motor that will be running Nitrous? Was considering the Girdle removal modification for more power but was just wondring if the girdle would be recommend for a Nitrous setup.

How do you figure removing the girdle will add any power to the motor??

The VE motor DOES NOT have a crank girdle like the DE does. The girdle is there for the DET motors for strength. for NA you do not need it. The VE oil pan does have a huge windage tray though. What you can do is remove your DE oil pan, remove the girdle. get some VE main bolts and install them so you no longer have a girdle. Now the VE pan with windage tray will fit. you can fit the VE pan and pickup, pump and all together. this is about 8% more WHP. usually about a 10whp improvement and it can be felt.

All SR20DETs have 200-230 HP. All SR20DETs come with girdles.

SR20DEs have 140-150 HP, you add 100 shot of NOS and you got 240-250 HP with 270-290 LB Ft Torque. ( That Should answer your question )

HP does not cause the motor to shift or flex but torque will.

Removal of the girdle will add about 7 hp on a SR20DE motor. This is a fact.

The girdle makes the oil bounce back and forth from girdle to crank. The faster you rev the more oil is doing this, the more power you lose.

Almost the same concept of knifedging a crank. As you are making the crank more aero drynamick so it can slice threw the soup of air and oil more easy. You end up with less frontal resistance.

SR16VE has the best crank scraper think to use in any of these motors.

Figure the SR16VE crank is 68.9mm and SR20 crank is 86mm to make the SR16VE crank scraper to fit as it is one pc unit all you would have to do is trim down 9.25mm or 3/8s off of the stands that hold it onto the oil pan and you would have the same clearance as it would be on a SR16VE when putting it on a SR20.

Why not just add an aftermarket DE windage tray then, and keep the girdle on the nos motor. Best of both worlds.

Waste of time in my opinion. With NOS added the small hp gain does nothing from keeping the girdle and going with a windage tray.

Thats just my opinion.

If I were to race a motor NA the gidle would be out. Once the girdle is out the windage tray would basically do nothing more than 1-2 HP. Not worth the waste in time and effort.

^^ if I'm understanding you correctly you are saying with the NOS the gains of the windage tray is negligable, so rather just keep the girdle instead?

Secondly, for a race NA motor, wouldn't the girdle be beneficial if you're revving above 8k rpm? Especially on a 4cw crank?

No, because most racemotors you got to pull them down and rebuild them every few events. So the xtra stress on the bearings will not mater.