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renrut
Original Poster
1,300 posts
75 months
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Wanting to pick the brains of the PH massive. I'm looking for info on what Noble change on their V6s to get the extra power out and keep them reliable under forced induction compared to the common or garden Ford / Jaguar / Mazda V6? I'm aware they add on 2 turbos (GT28s?) but beyond that finding concrete information is difficult. Some say they've got forged pistons to drop compression, some say its different rods, some say nothing. Its all just hearsay and I'd like to cut through all that and get some solid answers. Hopefully someone on here will have the answers, and ideally a shopping list 
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The devil
1,903 posts
53 months
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Majority of the turbos are t25
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Blu3R
1,423 posts
69 months
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renrut
Original Poster
1,300 posts
75 months
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T25s and shorter rods? A lot less than I was expecting. Anyone have the specific turbo P/Ns, I assume Garrett ones?
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Adrian W
8,235 posts
98 months
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What car are looking to put this engine in?
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TuxMan
7,214 posts
108 months
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There is a bit more than suggested , STD turbos are T25 or T28 both supplied by Universal turbos , Noble also fit a larger capacity sump and there are oil squierters machined in to the block to cool piston crowns , as suggested the con rods are shorted although STD cast pistons are kept . Also machined into the head are oil supply feeds for the turbo's . Tux
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mgbond
5,271 posts
102 months
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TuxMan said: There is a bit more than suggested , STD turbos are T25 or T28 both supplied by Universal turbos , Noble also fit a larger capacity sump and there are oil squierters machined in to the block to cool piston crowns , as suggested the con rods are shorted although STD cast pistons are kept . Also machined into the head are oil supply feeds for the turbo's . Tux Don't forget that the rods are also aroow rods and that the bolts used are ARP 2000. Bondy
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Boosted LS1
13,458 posts
130 months
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So, did they lower compression by using a shorter rod whilst keeping the stock piston? Surely not.
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renrut
Original Poster
1,300 posts
75 months
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Adrian W said: What car are looking to put this engine in? Well I've got an S-type with the AJ-V6 in it already and although I love the car, a little bit more power is always nice. So I was wondering what the damage would be to get a more powerful version of the engine built up then dropped in. As Noble have already done the leg work it would be rude not to pay attention. mgbond said: TuxMan said: There is a bit more than suggested , STD turbos are T25 or T28 both supplied by Universal turbos , Noble also fit a larger capacity sump and there are oil squierters machined in to the block to cool piston crowns , as suggested the con rods are shorted although STD cast pistons are kept . Also machined into the head are oil supply feeds for the turbo's . Tux Don't forget that the rods are also aroow rods and that the bolts used are ARP 2000. Bondy Thanks for that. Sounds like its a bit more intensive than just some shorter rods and a couple of turbos then what with machining work on the head and block.
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TuxMan
7,214 posts
108 months
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Boosted LS1 said: So, did they lower compression by using a shorter rod whilst keeping the stock piston? Surely not. Yep mate that's exactly what they did !!!
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Adrian W
8,235 posts
98 months
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renrut said: Adrian W said: What car are looking to put this engine in? Well I've got an S-type with the AJ-V6 in it already and although I love the car, a little bit more power is always nice. So I was wondering what the damage would be to get a more powerful version of the engine built up then dropped in. As Noble have already done the leg work it would be rude not to pay attention. mgbond said: TuxMan said: There is a bit more than suggested , STD turbos are T25 or T28 both supplied by Universal turbos , Noble also fit a larger capacity sump and there are oil squierters machined in to the block to cool piston crowns , as suggested the con rods are shorted although STD cast pistons are kept . Also machined into the head are oil supply feeds for the turbo's . Tux Don't forget that the rods are also aroow rods and that the bolts used are ARP 2000. Bondy Thanks for that. Sounds like its a bit more intensive than just some shorter rods and a couple of turbos then what with machining work on the head and block. The reason i asked was that the exhaust syatem will cost lots, you may be able to reduce the cost by using Noble manifolds, however you may find that you dont have enough space, the turbo's on the Noble are fairly close to the exhaust ports.
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Boosted LS1
13,458 posts
130 months
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TuxMan said: Yep mate that's exactly what they did !!! Oh dear, lol.
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chuntington101
4,090 posts
106 months
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It might be worth looking into a Rotex style supercharger also. THese are very small and could potencial be fitted to the front of the engine, or the side. Might make install a little easier.
there is a company call TTS that have kits for the Honda S2000 and Civics, maybe something could be built for the jag.
Chris.
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Mike Tuckwood
1,220 posts
69 months
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Boosted LS1 said: Oh dear, lol. Scarey huh! :-o
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key750
144 posts
46 months
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But cammes and timming are the same?
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paulcundy
1,878 posts
135 months
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"you may be able to reduce the cost by using Noble manifolds"
oh yes that will be because they last so long.....(needs a smiley here)
Regards
Paul C
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TuxMan
7,214 posts
108 months
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I thought the Jag engine had VVT , so I do wonder if the manifolds will fit ???
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andygtt
6,439 posts
134 months
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Boosted LS1 said: TuxMan said: Yep mate that's exactly what they did !!! Oh dear, lol. supports up to 500bhp like that tho so whilst surprising it wasn't exactly a bodge
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andygtt
6,439 posts
134 months
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TuxMan said: I thought the Jag engine had VVT , so I do wonder if the manifolds will fit ??? yes they do  dont think for one moment that they would be an easy fit on our car, believe me I have considered it hard... but with mine reving to nearly 8k Im just not sure I need the extra revs of the Jag head.
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renrut
Original Poster
1,300 posts
75 months
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Adrian W said: The reason i asked was that the exhaust syatem will cost lots, you may be able to reduce the cost by using Noble manifolds, however you may find that you dont have enough space, the turbo's on the Noble are fairly close to the exhaust ports. They put a V6 twin turbo diesel in there so there should be space for some turbos and pipework. But it depends on how big the turbos are I suppose. I'd imagine the ones on the diesel are pretty tiny being only just over 200bhp between 2 of them. A Rotrex was the first thing I looked at but stopped because the front of the engine is pretty cluttered already. Maybe worth a second look. If I changed over to electric PAS (no idea how difficult that is) then I could lose the PAS pump and have a nice location for it and it would be neatly tucked out of sight too.
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