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MG MGB GT V8 Factory Originals Technical - My updated MGB V8
|Hey everyone, finally got my MGB V8 (63 Olds 215 w/4bbl) back on the road after some extensive improvements(?). Added Currie/Ford 9 inch rear (3.0:1 gears) with Ford Explorer rear disk brakes. Griffin aluminum core radiator (extra row and tank capacity increased by a gallon, what a fascicle with the people at Griffin! was it worth it? I'll let you know next July). New 2950 cfm 11 amp fan w/ss blades. Car is now running at a cool 185 degrees F but heh its October. Spax adjustable rear shocks. Centered the gas tank. New Master Power Brake hydraulic unit and power booster (7 inch diameter). New front sway bar 3/4 inch. And about 100 other little detail oriented things. |
The 3.0:1 gears really keeps the rpm down but of course it doesn't seem to have the same grunt off the line as the 3.9:1 stockers had.
I'll keep you all posted as to how everything works as there are still a couple of minor details, or should we say ruff edges, to work out.
|Michael S. Domanowski|
Hope it was worth it! What tranny/tire combo are you running and what sort of RPM do you get at cruise at various speeds/gears with the 3.0:1 rear?
|What brand of fan and is it pull or push? What is the overall size of the rad core? Also interested in the trans gear ratios. Thanks.|
|The wheels/tires are 195 50 Series Dunlops on 15 inch Mini Lites. I know I have room to go to 205's both front and rear. The fan (don't recall the brand name) was from JEGS it was the one for $89.00 (16 inch 2950 cfm reversable ss blades) It was actually made as a puller to be mounted behind, but I mounted it in front of the radiator in a custom bracket and reversed the blades. I haven't changed the speedometer gear (need one from a MGC tranny so my indicated speed now is actually much less than I'm actually doing right now, good way to get a ticket if I'm not careful) in the stock MGB 4 speed. but on the highway at approximately 55 mph in 4th (told my wife to do 55 mph in her car along side me) I'm just under 2000 rpm. When I change the speedo gear I'll give you the rundown in all 4 gears. |
Today I have to bring her back into the shop as I have something intermittently rubbing on the left rear wheel, brake or axle.
The car feels very solid, I believe I'm 8 clicks out of 15 on the spax rear shocks.
|Michael S. Domanowski|
|My factory v8B with stock 3.07 rear and standard O/D box would be turning at just over 3000rpm at 100mph. (with 195/70/14 aspect tyres)|
I had a set of 205/50/14 tyres on a spare set of rims for when i went to the drags..Best time was 14.95/99mph with 180bhp motor..
The handling was much sharper with the lower profiles too, best compromise would be 195/60/15 to give correct gearing and good handling.
The smaller diameter rear tyres give a noticable reduction in gearing...But traction would be a problem off the line without an lsd.
Fuel consumption was always reasonable.we pay over £4.00 a gallon here!! Worst was around 12-14 mpg, but i could get nearer 30mpg on a run, but self restraint would be a problem!!
The box finally gave out a while ago, 3rd gear went awol, so have now bought a 5speed lt77 ex-Jag box and Rover bell housing as a replacement..
But whilst the motor and box is out i could buy a used 4.6 and................................................................................................................ahhhhhhhhhhhhhhhhhhhhhhhhhh where do you stop!!!
This thread was discussed between 26/10/2001 and 04/11/2001
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