Raptor twin turbo - ZR-1 Net Registry Forums

A26B · 08-29-2017

Several years ago, I made up an Excel calculator for turbocharged HP calculations, with variables input for; (1)engine normally aspirated RWHP, (2)Atmospheric Pressure & (3) Boost pressure. CHP is calculated by RWHP/(1-driveline loss factor).

For a 374 in3, 9.0 compression, stock cams & top end porting, RWHP was 398Hp.

At 9.0 psig boost, 642 RWHP, 755CHP

We will see how close this is. difference in displacement would be about 12 Hp less at the crank.

Thant's my guesstimate.

08-29-2017	#11
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,393	Re: Raptor twin turbo Several years ago, I made up an Excel calculator for turbocharged HP calculations, with variables input for; (1)engine normally aspirated RWHP, (2)Atmospheric Pressure & (3) Boost pressure. CHP is calculated by RWHP/(1-driveline loss factor). For a 374 in3, 9.0 compression, stock cams & top end porting, RWHP was 398Hp. At 9.0 psig boost, 642 RWHP, 755CHP We will see how close this is. difference in displacement would be about 12 Hp less at the crank. Thant's my guesstimate. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.