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The mkiv Supra Owners Club

Mark's 6 Speed Single Conversion.


mark newman

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Not a good day at the dyno yesterday my engine let go, the engine was making good power it was making 1075bhp at only 1.9 bar at the hubs and sounded great ,so I was thinking I would have a good weekend of racing at the pod. but when we turned on the nos after two runs this happened

, oh well, we think the end of a spark plug came of , but we wont know untill I take the engine out and strip it out , So it looks like I will start rebuilding again. cant wait to hear this turbo set up start again .
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Thanks for the support guys . but when you put that much power through an engine its going to go pop sometime, but would of been nice to do some racing first , oh well I started tonight stripping the engine it seems that the turbo is ok as nothing has gone through it , but there is grity oil in the oil drain , so it will have to be cleaned out or the bearing replaced, I think that i have cleaned it all out and the turbo spins nice again, so thats a result . I have started planing my new build , and going through the parts I need , will be looking for a block, pistons, rods, billet main caps, mybe a stock crank.

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  • 3 weeks later...

I will start with the new engine install today if the rain stays of I still need to work out what I am going to do with the head yet , but the new engine should be ok

 

 

Carrillo H Beam Rods with Carr Bolts

JE 87mm Custom Pistons 9:1 Compression

ACL Race Bearings

Polished Crank

All fully Lightened and Balanced

Titan Billet Main Caps

ARP Main Studs

L19 head studs

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not sure what you mean.

 

Why are you going with 9:1 compression ratio pistons when your running crazy boost and nitrous on pump fuel? I was always under the impression you need to run 8.5:1 on nitrous engines unless your running strictly E85.

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The high compression is a good choice imo, especially as mark plans to run race fuel, I ran a high comp engine in my supra and have done the same in my GTR, even on pump fuel there was no issue, I still managed big power at 2.6 bar on vpower.

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It should be better for spooling my 88 mm turbo , so I might not have to use nos untill I get this engine settled in for a bit, It has been really hard starting all over again after it was all finished ready to race the next day , now I have got is lots of bits , and nuts and bolts all over the house, garage. car transporter , and in the car , what a mess I hope I don't forget how to put it all back, and it runs first time .

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