I went engine shopping today for my XF, I will probably get a clevo now for sure.
I can get either all the gear to make the clevo suit my 6 cyl single rail or a C4 for $400.
Which should i get? Will the C4 allow for strong take off like my 4 speed?
What would the c4 rev like at 100km/h?
What would you guys choose?
6 cyl single rail or C4?
What are the benefits of going for a c4?
I would like to keep the manual but if it only lasts 5 minutes ill live without it.
The C4 will handle the 351 better than the single rail, though the single rail will be much better while it lasts, because I think autos suck.
I've destroyed several single rails behind warm 351's.
I have a top loader with Hurst Indy shifter for sale if you're interested.
I want about $1200 for my top loader, as it's a close ratio unit. It also has a good shifter.
It depends what diff ratio you have with regards to spinning the wheels.
If you have lower than 3.25's then spinning the wheels will be no problem, however if youhave taller than that, it may be a problem.
It also depends on your tyres and whether the diff is LSD or not.
Single rail will last behind a stock 351, I've had two 351 in different vehicles and they lasted OK. Generally the first thing to go are the bearing, you'll hear them whine, the input shaft will wobble a fair bit.
If your spinning the wheels a lot and use the gearbox agressively it won't last as long.
The RPM at 100km/h for both a c4 and single rail would depend on your diff ratio and tire size. A 2.75 diff with 14' tires will do around 2300rpm at 100.
Manuals are more fun than auto's I'd go the manual single rail, then when you have more $$$$ buy a toploader, you should be able to get one for around $500-600.
Also don't use a twin plate clutch, use a single 11' clutch and pressure plate, there stronger.
You might have to change your diff and ratio to handle 351, whats the current setup?
Its currently the stock 2.92 single spinner diff.
If i keep the single rail to use with the V8 will i need a new clutch?
I would have thought that since my Dad's old EA with 2.77 ratio could spin them then a 5.8 with a 2.92 single spinner should have no problems. I would hate to put this engine in then not be able to perform whan my mates demand it. They are commodore drivers, i cop enough grief.
i had a 277 with a c4 no problem with spinning (got video)
if you keep the single rail you need a
bell housing
flywheel
clutch
clutch pedals
clutch master cyilinder , slave ,connection hose.
the v8`s in that range is hydrolic clutch not cable thats going to be the costly part inless you get a compete conversion.
it would be cheaper and more realiable with a c4 but you cant go as wild with the cam without getting a high stall.
I was quoted $400 for the whole kit to convert, it did include the hydraulic clutch set up but not sure if a new clutch was included. This was from a wrecker on canterbury road.
Will I need to change my pedal box?
I might go the C4 for now and save up and get myself a nice 5 speed supra box or something like that. My mate has one in his torana and its very nice. As long as it can go okay and put on a show i dont mind if its auto. I dont plan on doing anything drastic to this engine for a while either.
That seems a lot easier and cheaper than kleeping a manual that i might destroy within a week. I will go the auto and have a nice cruiser for a little while.
Thanks for your help.
Is your XF engineered? Does it run gas? do you get hassled by the law in it?
mine not lic yet will have no problems when i do
i used a 85 xf body so no need for cats and not as much emisions i hope.
its farely easy over here in perth mine has top loader & hurst shifter.
this is what i payed 7year ago
$400 box
$450 conversion kit,bellhousing clutch, flywheel ,hydr ,etc
$1000 to rebuild the box after killing it 2 years later.
i have the head built with ss valves so i could run gas if i wanted but its going to be a backup weekender.
with gas i dont see the point in less the price of gas prices go down seing you use twice as much than petrol.
Mine is an 85 model as well.
Im worried about getting pulled over. Im a P plater with a 351 and It wont be engineered for a while. Im not sure on what i would need to do to make it legal though. The wrecker told me straight gas.
I might have to make a few calls during the week and suss it out.
Until then I will put in a very quiet Exhaust.
Gas here today was .29 and petrol was .87 so I might consider it in the future when I recoup my bank account.
Thanks for all your advice. I cant wait to have this put in. My mate upgraded to a 5 litre from a 253 in his torry on the weekend and my 6 cylinder XF could just take him with the 253. Im not telling him Im putting in a 351. He will get quite a surprise he he!
Cheers
Dan
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