moosetvr Posted April 30, 2007 Share Posted April 30, 2007 Hi, I have a Spitfire fitted with a 2500 straight six taken from a Triumph 2.5S. As far as i know the engine is standard, breathing through twin 1 3/4 SU's.Can anybody advise me whether the 1.55 ratio roller rockers available from www.goodparts.com would have much benefit as an easy bolt on upgrade, or whether this is not worth bothering with and just go ahead and do the TR6 camshaft swap that has been recommended on this site a number of times. Or is there another option in this area of camshaft and valve lift??Thanks Darren Link to comment Share on other sites More sharing options...
Deleted User Posted April 30, 2007 Share Posted April 30, 2007 post removed on request of author Link to comment Share on other sites More sharing options...
Jason Posted May 1, 2007 Share Posted May 1, 2007 Certainly the TR5 profile is great with injection, they complement each other very well :-)If it were down to cam or roller rockers, I'd spend my cash on the cam anyday Link to comment Share on other sites More sharing options...
Deleted User Posted May 2, 2007 Share Posted May 2, 2007 That TR5 cam runs absolutely great on carbs, I used them a lot on 1500 Spitfires, and 2.5L saloons which always raised the power out to well over 90bhp (on 1500) even with the original exhaust manifold, and they work great on Mk111 1300 too with a good exhaust.Always caused a bit of a suprise, - apart from the slightly lumpier idle no-one could see a visual difference apart from they had loads of torque and went like rockets.There is a downside, they do run-on a bit on carbs with the higher compression heads, that's why they detuned them and brought the CR down. Link to comment Share on other sites More sharing options...
Clive Posted May 2, 2007 Share Posted May 2, 2007 Fair do's then. TR5 profile is a good one!Clive Link to comment Share on other sites More sharing options...
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