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RE: 4.6 HSE torque settings (fwd)

To: buick-rover-v8@Autox.Team.Net
Subject: RE: 4.6 HSE torque settings (fwd)
From: pasanewt@cheerful.com
Date: Thu, 19 Nov 1998 11:10:03 -0500 (EST)
 >
> > > > 3.5 litre Rover + 2100lbs + nitrous = 10.62 secs @ 126 mph - on
> > > > street tyres!!
> > > >
> > 
> > Tell me more.  What is the car, what mods has the engine got ?
> > 
> > Thanks,
> > 
> > Ian
> > 
 ---- you wrote: 
> Ian, thanks for the interest.
> 
> The car has a full tube chassis, 9 inch Ford axle, Powerglide automatic 
>transmision with manual shift, trans brake and high stall convertor. The body 
>is from a Vauxhall Firenza. Total weight, with driver is 2100 lbs. 
> 
> I designed and built the chassis myself. I even made the tube bender! In 
>fact, the only things I didn't do myself was bore the block and balance the 
>shortened propshaft. Am I a tight wad or what!!
> 
> Fitting the powerglide was a master-stroke. The class I used to race in 
>insisted on street tyres. Manual transmissions shock the tyres too much, the 
>auto really improved the launch.
> 
> The engine spec is as follows -
> Standard SD1 3.5 litre block +0.020 
> 
> standard crank
> 
> Group A steel con rods
> 
> Ross forged flat top  pistons
> 
> Solid lifter cam (based on a crane 256 design)
> 
> Roller chain cam drive
> 
> Hollow chrome moly push rods
> 
> Kenne Belle roller rockers (this may have been a mistake as I have had 
>horrendous valve spring problems which I suspect are caused by these heavy 
>rockers. I usually have to change 50% of the valves and all the springs after 
>about 10 runs)
> 
> Standard valves with some minor mods to improve flow
> 
> I ported the heads myself using my home built flow bench. I've got some 
>bigger valves, but want to cure my valve spring problems before fitting them. 
>Flow testing didn't reveal huge flow gains anyway. I suspect it's because of 
>the bore shrouding the valves.
> 
> Huffaker intake manifold. (I flowed a Harcourt, but got better results from 
>the Huffaker. This may not be a good comparison though, as the previous owner 
>of the Harcourt had done some (bad) porting on it).
> 
> 650 CFM holley double pumper
> 
> Maximum RPM is up to 7400 RPM, depending how good the valve springs are.
> 
> NOS Nitrous oxide plate injection. I made my own  fuel and N2O jets and used 
>an electrical bottle heater to stabilise the N2O pressure at about 1000 PSI, 
>adjusting the fuel pressure for fine tuning.
> 
> I have never dynoed the engine, but Quarter Junior comes up with about 390 HP 
>and a 0 to 100 MPH time of 6 seconds.
> 
> Adrian, Halifax, West Yorkshire. 
> 




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