BDR750 Posted September 23, 2002 Share Posted September 23, 2002 Wanted - Matching set of 4 high compression forged pistons for 2lt vx - st bore or oversize. Link to comment Share on other sites More sharing options...
Chelspeed Posted October 2, 2002 Share Posted October 2, 2002 I've got a set of 86.25mm omega slippers, dyno use only. Downside is you need to run longer than standard rods. Make great desk ornaments too..... Link to comment Share on other sites More sharing options...
murph7355 Posted October 2, 2002 Share Posted October 2, 2002 Didn't Arn say he was selling some of these at some point soon? Will they fit in a BD? Link to comment Share on other sites More sharing options...
edmandsd Posted October 2, 2002 Share Posted October 2, 2002 They're for a friend running a nitroused vx Andy - Personally won't go near the stuff...........gas not vx's. He can't afford longer rods i'm afraid - thanks anyway Graham. Link to comment Share on other sites More sharing options...
Peter T Posted October 3, 2002 Share Posted October 3, 2002 SEt of 86.5m any good to you? C7 PWT X-Flow all Steel Link to comment Share on other sites More sharing options...
BDR750 Posted October 3, 2002 Author Share Posted October 3, 2002 Sounds fine - Can you overbore these engines 0.5mm safely ? Assume they're forged - what compression are they Peter ? Are they in good nick ? How much ? Cheers David. Link to comment Share on other sites More sharing options...
Peter T Posted October 3, 2002 Share Posted October 3, 2002 Yes they are forged, and brand new, they were for my X-flow block, so they have not been machined in any way yet ,they do however have two cutouts for a 2 valve motor in them, but there is also a lot of material left in the crown area, i will not be able to use them, as my chances of finding X-flow block going out too this size again is minimal. C7 PWT X-Flow all Steel Link to comment Share on other sites More sharing options...
edmandsd Posted October 4, 2002 Share Posted October 4, 2002 I don't think a piston designed for an 8 valve Ford engine would be suitable would it ? Peter I used to have an 1825cc Crossflow with 86.5mm bore on an AX block and it broke the cylinder wall requiring a liner to be fitted. Home of BDR700 Edited by - edmandsd on 4 Oct 2002 16:55:33 Link to comment Share on other sites More sharing options...
EFA Posted October 4, 2002 Share Posted October 4, 2002 Youc an overbore the VX to 88mm in line or 90mm stagered Fat Arn Visit the K2 RUM website See the Lotus Seven Club 4 Counties Area Website here Link to comment Share on other sites More sharing options...
Peter T Posted October 7, 2002 Share Posted October 7, 2002 Dave, are you saying that you linered it to 86.5mm, after breaking through the walls? Surely there must have been no meat left in the block to support the liners? also it would make the block too flexible for sustained high RPM. Did this engine last long? Was this the engine that was fitted prior to your current? Thanks , PS what size primaries where you using on your X-Flow. C7 PWT X-Flow all Steel Link to comment Share on other sites More sharing options...
edmandsd Posted October 7, 2002 Share Posted October 7, 2002 Yep that's what i' saying and the engine was fine after that - HTR can do this for you if required. I tried numerous manifolds but the best was a 4>2>1 design with 1 7/8th primaries. This really suited the high valve acceleration cams I used i.e. Kent 264/272. Cheers Dave Link to comment Share on other sites More sharing options...
Peter T Posted October 7, 2002 Share Posted October 7, 2002 Dave thanks, What is HTR location/ Phone no? Peter. Link to comment Share on other sites More sharing options...
Peter T Posted October 7, 2002 Share Posted October 7, 2002 PS Dave could you let me know who built your exhaust, do they have a pattern? or was it a one off? Link to comment Share on other sites More sharing options...
edmandsd Posted October 7, 2002 Share Posted October 7, 2002 HTR are on 01474 872888 and based next door to Brands Hatch Paddock entrance - Talk to Aaron Tucker the engine builder - i'd suggest at the end of the week though because they're all at Spa currently. Ray Addis is effectively the other half of HT Racing and he makes all my manifolds, front suspension, axle, rear brakes, rollbar etc (In fact Ray and Aaron built the whole car/engine between them). The dimensions of the manifold were as follows: 12 inch long 1 7/8th inch o/d primaries 24 inch long 2 inch o/d secondaries 2.5 inch o/d system Link to comment Share on other sites More sharing options...
Peter T Posted October 7, 2002 Share Posted October 7, 2002 Thank you very much Dave, i will not pester you any more! as you have been more than helpful. Peter. C7 PWT X-Flow all Steel Link to comment Share on other sites More sharing options...
greg Posted October 7, 2002 Share Posted October 7, 2002 Peter T, Go one, I'm reading all this with great interest. Thanks Dave. Greg, Q 86 NTM (Green 185BHP XF) Link to comment Share on other sites More sharing options...
Peter T Posted October 7, 2002 Share Posted October 7, 2002 No greg, how about i pester you! what engine mods have you done to produce your x-flow? C7 PWT X-Flow all Steel Link to comment Share on other sites More sharing options...
edmandsd Posted October 7, 2002 Share Posted October 7, 2002 Pester all you like Peter - on or offline I don't mind. I spent so much time and money getting the best performance out of my crossflow that i'd be delighted to help steer someone down what I believe is the right track. Link to comment Share on other sites More sharing options...
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