greenstream Posted June 9, 2013 Share Posted June 9, 2013 As per title. Will they do any good for my challenge truck with a 3.9 and are there any other things that would need upgrading besides the ecu ? Cheers Morten Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 10, 2013 Share Posted June 10, 2013 For the money it might be more useful to put a 4.6 in for more low-end torque rather than more top-end bhp. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted June 10, 2013 Share Posted June 10, 2013 Have you found some cheap? Cos new they are ££££££££££££££££££££££££s! (yes it needed that many pound signs... (£1315+VAT pair) Some other reading.... not too impressive by all accounts: http://www.v8forum.co.uk/forum/viewtopic.php?t=10269&sid=1a19763e48de8fc571a9f801f5ff2238 Quote Link to comment Share on other sites More sharing options...
Soren Frimodt Posted June 10, 2013 Share Posted June 10, 2013 I think Morten is thinking about a pair that is for sale in Denmark at the mo, they are very cheap indeed yes, will not post the price, to avoid stepping on anybodys toes, but lets just say they are very cheap indeed Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted June 10, 2013 Share Posted June 10, 2013 IMHO overrated vs a good set of well ported heads a la JED etc Nige Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted June 10, 2013 Share Posted June 10, 2013 If very cheap, then go for it, got to be a lot better than stock heads, even if they don't hold a candle to some JED stage III/IV heads. Make sure you get EVERYTHING you need, they are quite different... Quote Link to comment Share on other sites More sharing options...
task Posted June 10, 2013 Share Posted June 10, 2013 From what I've read and seen (a friend has some fitted to a 4.6 in a classic) then the exhaust ports are a different height so you need to modify the exhaust. As Bowie says, a lot of the other parts are different including the rocker covers, so make sure it's all there. To get a true benefit you need to change camshaft and possibly port the inlet manifold, ideally you'll need to re-tune your ECU however they will work without doing all that stuff and you would see a gain. Quote Link to comment Share on other sites More sharing options...
greenstream Posted June 10, 2013 Author Share Posted June 10, 2013 Thanks guys Yeah Soren is right about the ones. Regarding exhaust then I will have to make my own for this car anyway. And is saving pennies for at mail to Nige, so trim of ECU will be needed to. They been on a 4.6 for 2 years and over here I will pay 3 times as much for a 4.6 than I have to pay for these heads. Hmm thinky thinky ... Morten Quote Link to comment Share on other sites More sharing options...
Team Idris Posted June 11, 2013 Share Posted June 11, 2013 Or some of this http://forum.britishv8.org/read.php?6,12097 Quote Link to comment Share on other sites More sharing options...
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