Trond
Lifetime Supporter
Hi
I am building a new engine for my SPF GT-40, using my existing Roush 427R in a Mustang-project of mine.
After some consideration, I think of going for a 402 cui with 4.125 bore and 3.750 stroke, using this parts:
Dart 9.5 Windsor SHP cast iron Block
Callies Dragonslayer crank
Oliver Billett rods
Custom made Diamond Racing pistons, 10,75 compression
Solid roller cam, Jesel shaft rockers, Isky Red Zone lifters
AFR 220cc Runner Renegade race heads, custom milled
BLP prepped Holley 850cfm carb
MSD ignition
All other bits and pieces of the highest quality to secure durability. Everything balanced, and carb and ignition fine tuned on the dyno.
This should give appx 650-700HP at about 7-7200rpm, and appx 575 lbs/ft of torque at about 5500 rpm. The engine will be a little rough but fully driveable at 1500rpm and smooth running from 2000 rpm. It will be able to handle 8000-8200 rpm. I prefere a higher revving, higher HP engine with a little less low rpm torque compared to the Roush I have today. Almost 75% of my use of the car is at the track.
Question 1: What are Your thoughts of the engine combination?
Question 2: After talking to several Builders, I have a good impression of Scott Shafiroff Race Engines www.shafiroff.com Anybody having experience with them?
Best regards
Trond
I am building a new engine for my SPF GT-40, using my existing Roush 427R in a Mustang-project of mine.
After some consideration, I think of going for a 402 cui with 4.125 bore and 3.750 stroke, using this parts:
Dart 9.5 Windsor SHP cast iron Block
Callies Dragonslayer crank
Oliver Billett rods
Custom made Diamond Racing pistons, 10,75 compression
Solid roller cam, Jesel shaft rockers, Isky Red Zone lifters
AFR 220cc Runner Renegade race heads, custom milled
BLP prepped Holley 850cfm carb
MSD ignition
All other bits and pieces of the highest quality to secure durability. Everything balanced, and carb and ignition fine tuned on the dyno.
This should give appx 650-700HP at about 7-7200rpm, and appx 575 lbs/ft of torque at about 5500 rpm. The engine will be a little rough but fully driveable at 1500rpm and smooth running from 2000 rpm. It will be able to handle 8000-8200 rpm. I prefere a higher revving, higher HP engine with a little less low rpm torque compared to the Roush I have today. Almost 75% of my use of the car is at the track.
Question 1: What are Your thoughts of the engine combination?
Question 2: After talking to several Builders, I have a good impression of Scott Shafiroff Race Engines www.shafiroff.com Anybody having experience with them?
Best regards
Trond