chrisc Posted March 11, 2005 Report Share Posted March 11, 2005 I am just starting an engine rebuild on a TR4 and could use some advice on what modifcations are worthwhile from the vast range available. The car is for normal road use, not too concerned with originality, prefer practicality! Quote Link to post Share on other sites
Ade-TR4 Posted March 11, 2005 Report Share Posted March 11, 2005 Hi rear oil seal conversion is a good place to start and an unleaded head. How much are you planning on spending, because crank balancing is very worthwhile, whether removing the original fan extension or not (I would, and fit a damped pulley). A "road" cam will liven things up a bit without needing to go through the whole car modifying everything else "downstream". Oh, and a stainless extractor manifild is something to consider (fit and forget!) and late 4a inlet manifold (swept type with HS6s) You could go much much further...stronger rods, increase in liner size (upto 89mm for road reliability so I'm told), gas flowed head.......... I'm sure there'll be plenty more replies! cheers Adey - let us know what you decide Quote Link to post Share on other sites
GSKTR4 Posted March 11, 2005 Report Share Posted March 11, 2005 Lightened and balanced flywheel always seems a popular mod. Quote Link to post Share on other sites
Andy Moltu Posted March 11, 2005 Report Share Posted March 11, 2005 Lightened and balanced flywheel always seems a popular mod. Helps to reduce risk of broken cranks. Given that it's a pretty agricultural engine balancing the bottom end is worthwhile. Gas flowing the head boosts performance without hurting economy. Naturally do an unleaded conversion. A wilder cam may help boost performance but don't go too far and make sure that you decide whether or not you will be sticking with the SU carbs or going to Webbers (always tempting but can be thirsty). If you do swap cams get good advice from people like Jon Wood at Classic Racecraft or Cambridge Motorsport ot TR Enterprizes. Quote Link to post Share on other sites
chrisc Posted March 14, 2005 Author Report Share Posted March 14, 2005 Thanks for the replies Gents, Having looked at the budget looks like internals first, unleaded head, rear oil seal conversion, balance the crank, lightened & balanced flywheel plus fast road cam. Manifolds can come later when I can smuggle further funds from the joint account! Chris Quote Link to post Share on other sites
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