88v8 Ivor Duarte Gloucestershire UK (1041 posts) Registered: 02/11/2010 04:29AM Main British Car: 1974 Land Rover Lightweight V8 |
350/350 combo - undergeared?
This TR6 ticks many boxes for me, chiefly that it's all done and it's a right-hooker. Not quite true that there are no other TR6 V8s in the UK, but there certainly aren't many. Unmodded bodywork other than a raised rear edge on the bonnet, nicely trimmed.
It has much to commend it. [www.carandclassic.co.uk] However.... it's pretty clear from the Info Sheet created by the previous owner that it was built on the cheap. It has a standard TR6 rear end, and a TH350 or 400 box, seller couldn't say which. He seemed not to know that a B&M Quicksilver isn't a gearbox.... And he was rather evasive abut the overall gearing, but I reckon it's got to be about 21mph/1,000rpm. This seems awfully low. Now, I know I can put in an R200 rear end with a Goodparts kit. I want an autobox and I could convert it to a 700R4, but that will cost, and the price isn't exactly keen. A crate 350 sitting at an 80mph cruise of 3,800rpm is going to eat fuel. How happy would it be at those cruising revs? Ivor |
Anarchy99 Jim Purdy Memphis, TN (156 posts) Registered: 12/06/2013 03:54PM Main British Car: 61 austin healey sprite LS6 |
Re: 350/350 combo - undergeared?
A th400 and a 2004r are roughly the same dimensions and you only have to modify most trans mounts a little bit to make them fit. It'll get you overdrive and if you already have a th400 it's a fairly straight forward swap, just a TV cable.
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Sidecardoug Doug Rowe Northern Nevada (51 posts) Registered: 07/04/2012 05:09PM Main British Car: 1969 TR-6 Ford 302 |
Re: 350/350 combo - undergeared?
Ivor-
Basically the same issue as with my TR6/Ford/C4. Rear gears are a no-go. The TR6 comes with 3.69:1, the best the GoodParts can do is 3.54:1, IF you get a diff sourced from the Z car. The 700R4 or 2004R is probably your best bet. If the exhaust runs alogside the driveshaft, a GearVendors overdrive almost certainly won't fit. Without the exhaust in the way, you might be able to fit one with a bit of sugery to the tunnel cover. The GearVendors overdrive is about $3000 US with the tailshaft adaptor. One thing to watch for with the 700R4, is that they don't like to be run in overdrive below 45-50mph, as the pump doesn't spin fast enough to maintain best pressure. There are kits available to fix this, probably found through Summit Racing or Jeg's. Doug . |