Roland Racing teamed up with The Race Shop to develop a top end package that will extract the most useable power from a stock block with a 7500rpm limit in a drag car application. The block is a 1968 400. It's filled halfway up the water pump holes, with 4 bolt splayed caps and a lifter bore brace added. Call for package pricing and delivery.

This engine has the Race Shop's model #420 CNC program on the CV-1 heads, with the CVI-2 intake port matched and polished. A 2" plenum spacer was added that is available through Roland Racing. The fuel was C16.

Specs and results from the Race Shop's 3000hp DTS SAE dyno:

If you have more questions or would like a complete printout of the results, call Charlie or I. This engine was plumbed for nitrous per customer request, but it was not used during the testing. It will be installed in a 2850lb tube chassis car for track testing very soon!  

PHR's CV-1 street/strip bruiser

After numerous scheduling setbacks, the 400 block based CV-494 Pontiac was ready for testing at the well known Westech Dyno facility. The CV-1 heads are unported, the CVI-1 manifold port matched only.

The first tests started out with 1.75" headers to set the A/F mix, as this was the only set with an O2 sensor available. Subsequent tests were run with 2.25" primary headers which yielded 40hp gain! Suffice it to say the CV-1's prefer big tubes for max power. BMEP and BSFC #'s show that this head is a deep breather, yet docile enough to drive on the street with the conservative CR. 

Interesting point that the 494 peak torque rpm of 5400 coincided with the 428 value.  

(Special thanks to Outlaw Racing and Johnny Hunkins Of PHR     Pics courtesy of Ken C.)