How to build the frame to handle 800 horsepower? (Page 6/6) Filben MAR 09, 09:49 AM You are not putting 800hp in a fiero. At best you can build an 800hp tube frame car and put a fiero body on top of it. olejoedad MAR 09, 10:11 AM quote Originally posted by fieroguru: You would be amazed at what you can get used to... 6 years and 55K miles with my LS4/F40 with 382 rwhp or between 425 to 450 fwhp. It was a blast, but I got used to it and wanted more. Now with the upgrades and turbo, I am approaching 700 fwhp and have about 6,200 miles on it. 1st and 2nd gear is wheel spin city if I want it, 3rd is a rocket (4th would be north of 125 mph). The car is currently getting an ecm upgrade so I can have boost by gear and traction control. Both will help detune 1st and 2nd gear so I can better match the power with the traction. Also adding an intercooler and will likely switch to e85 and start bumping the boost more in 3rd and 4th. Longterm goal is AWD... Filben, are you sure about that? Read fieroguru's build thread in the Construction Zone.