Roush 427sr-tw or 427r?

[Bernica]

Yup. I would much rather have one personal engine builder that I could count on and call if I had a problem and not deal with a morass of corporate BS, only to end up in a time-sucking hole and stuck with a lot of costs that are "exluded".

[Stephen Crosten]

Another perspective; my SPF was built in 2010 and has logged just over 26000 miles. I have experienced no mechanical problems and the engine (427sr/tw) does not burn or leak oil. Needless to say I am very pleased with the power plant. However, should I ever replace it I will probably go with a Blykins engine. He is very available to discuss issues and make suggestions, and from what I have seen makes a damn fine engine at a reasonable price.

[RodKnock]

Here's a couple more threads from over on the GT40s Forum:

Roush engine failure... - GT40s.com

Roush 427IR: Camshaft & Distributor Gears FAILURE - GT40s.com

[PHMCobra]

I purchased my Backdraft R3 Roadster new in year 2015 with a Roush engine (427R dyno tested at 550 HP and 528 FT-LBS Torque) and a Tremec T56 6-speed tranny. I have driven the vehicle for a year and a half and have observed no engine leaks and only slight bucking at lower RPMs (below 1800). I have no oil burning problem--the dipstick showed no measurable loss in oil after the first 1000 miles and no measurable loss since. I live in the Phoenix and have not incurred any heat problems while driving in the hot summer heat (well over 100 F). I must say that I am quite pleased with the Roush powerplant in my Backdraft Roadster. I guess I got a good engine. Sorry to hear about all the 'nightmare' problems with other Roush engine owners.

[JWilly]

I have the Roush 402R (got it in 2007). It does not leak oil and I have had no mechanical issues. It does buck some if it gets much below 2000 rpm. In that case I drop down a gear and problem solved. I can only speak from my experience but I would gladly purchase another Roush engine in a heartbeat.

[fordracing65]

I think the problems were more with their FE lineup.