SBC swap PROS and CONS....Who bought the renegade mounts and kit...?
I've already had 3! 
09-21-2008, 08:58 PM
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09-21-2008, 08:59 PM
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09-21-2008, 09:39 PM
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Erkka summed up the rationally available choices rather well.
Without resorting to a complete de-design of how the cylinders and pistons are gonna operate, the largest plain-overbore would be the 104mm 968 sized pistons on a stock GTS block and crank that's been bored out to match. That gives you about 5.8 Liters.
"BEST VALUE IN THIS PACKAGE" is a rather whacky rant, since there is no such package, at least certainly not in any "value" category.
Finding a used or cheap set of cranks and rods to bump the stroke (as opposed to the piston diameter) would probably be the "best value" direction, albeit you are still gonna need to figure out how to efficiently fill that longer stroke with fuel and air, plus vent it on the exhaust side (cams anyone?)
Without resorting to a complete de-design of how the cylinders and pistons are gonna operate, the largest plain-overbore would be the 104mm 968 sized pistons on a stock GTS block and crank that's been bored out to match. That gives you about 5.8 Liters.
"BEST VALUE IN THIS PACKAGE" is a rather whacky rant, since there is no such package, at least certainly not in any "value" category.
Finding a used or cheap set of cranks and rods to bump the stroke (as opposed to the piston diameter) would probably be the "best value" direction, albeit you are still gonna need to figure out how to efficiently fill that longer stroke with fuel and air, plus vent it on the exhaust side (cams anyone?)
09-21-2008, 10:06 PM
#37
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Without resorting to a complete de-design of how the cylinders and pistons are gonna operate, the largest plain-overbore would be the 104mm 968 sized pistons on a stock GTS block and crank that's been bored out to match. That gives you about 5.8 Liters.
"BEST VALUE IN THIS PACKAGE" is a rather whacky rant, since there is no such package, at least certainly not in any "value" category.
Finding a used or cheap set of cranks and rods to bump the stroke (as opposed to the piston diameter) would probably be the "best value" direction, albeit you are still gonna need to figure out how to efficiently fill that longer stroke with fuel and air, plus vent it on the exhaust side (cams anyone?)
"BEST VALUE IN THIS PACKAGE" is a rather whacky rant, since there is no such package, at least certainly not in any "value" category.
Finding a used or cheap set of cranks and rods to bump the stroke (as opposed to the piston diameter) would probably be the "best value" direction, albeit you are still gonna need to figure out how to efficiently fill that longer stroke with fuel and air, plus vent it on the exhaust side (cams anyone?)
5L cranks are cheap.
Rods to use with 968 pistons in stock material at 104mm must be custom produced. Figure @$1500
You can also go in the direction of coating the block to use less expensive rods and pistons.
Carl at 928Motorsports.com is the only resource I know that would currently provide a kit.
Regardless of the direction you choose, plan on spending at least $10k, more depending on whether you plan on someone else doing the assemby.
For a stock material block:
$2500 or more: stroker crank
$1000 or more: used 968 pistons ($2000 or more if you need new)
$1500 or more: rods
$250 or more: used 85/86 block
$750 or more: bore and lap 85/86 block
$1500 or more: bearings, gaskets & rods
$1000 or more: 928 S4/Gt/GTS heads
$2000 or more: 968 valve work
Optional:
$3000 or more: dry sump
$2400 or more: itb intake
$2000 or more: clutch & flywheel
$2000 or more: electronic upgrade (sharktuner, motec, dta, etc).
$2500 or more: stuff I forgot
$????? or more: labor
The above presumes the rest of your 928 is up to the task.
Last edited by Stan.Shaw@Excell.Net; 09-21-2008 at 11:17 PM.
09-21-2008, 10:27 PM
#38
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"Regardless of the direction you choose, plan on spending at least $10k"
THAT IS SOME DISTURBING SH*T.
Doesn't small block chevy maintain the same (weight) balance aspects while providing superior dollar vs. dollar Power , torque, and reliability overall? How many guys have actually bought the Renegade kit and converted to SBC power?
THAT IS SOME DISTURBING SH*T.
Doesn't small block chevy maintain the same (weight) balance aspects while providing superior dollar vs. dollar Power , torque, and reliability overall? How many guys have actually bought the Renegade kit and converted to SBC power?
09-21-2008, 11:00 PM
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A Renegade kit will end up cost you the same or more.
As others have suggested, just buying a vette is simpler and less expensive.
As others have suggested, just buying a vette is simpler and less expensive.
"Regardless of the direction you choose, plan on spending at least $10k"
THAT IS SOME DISTURBING SH*T.
Doesn't small block chevy maintain the same (weight) balance aspects while providing superior dollar vs. dollar Power , torque, and reliability overall? How many guys have actually bought the Renegade kit and converted to SBC power?
THAT IS SOME DISTURBING SH*T.
Doesn't small block chevy maintain the same (weight) balance aspects while providing superior dollar vs. dollar Power , torque, and reliability overall? How many guys have actually bought the Renegade kit and converted to SBC power?
09-22-2008, 08:28 PM
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Been there with the vette, had a 99..... The fit and finish of the 928 is FAR superior (as everyone here already knows). It's a shame that every swap I've ever seen has been too understated. It could be done in a way that makes waves around here... I'm not talking about that BIG BLOWER sticking out of the hood either... Thats ridiculous.
09-22-2008, 08:32 PM
#42
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The best bang for the buck power-wise for a 928 is forced induction. It is also the easiest and shortest time to install. The only downside is if you live in a place where a visual inspection of an aftermarket forced induction system will make the car fail.
Dan
'91 928GT S/C
475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
09-22-2008, 08:51 PM
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Been there with the vette, had a 99..... The fit and finish of the 928 is FAR superior (as everyone here already knows). It's a shame that every swap I've ever seen has been too understated. It could be done in a way that makes waves around here... I'm not talking about that BIG BLOWER sticking out of the hood either... Thats ridiculous.
I tend to be someone who cautions people about getting involved with 928s. They are cheap to buy, but can be expensive to own. If you need more hp than stock, than obviously the price tag does up.
As for me, I am a 928 lifer
09-22-2008, 09:02 PM
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I am not sure what you mean. My opinion is that too often someone thinks putting a chevy motor in a 928 is a quick and cheap solution to more hp. I have seen enough examples of such projects show up on ebay, unfinished, to be convinced that it is not quick, cheap or easy. I expect when you buy the motor, buy the kit and get it all to work, you will have a @$10k solution. An SC is definitely cheaper, but of course you need a solid 928 motor to start with, so maintenance must be up to date, good compression, etc.
I tend to be someone who cautions people about getting involved with 928s. They are cheap to buy, but can be expensive to own. If you need more hp than stock, than obviously the price tag does up.
As for me, I am a 928 lifer
I tend to be someone who cautions people about getting involved with 928s. They are cheap to buy, but can be expensive to own. If you need more hp than stock, than obviously the price tag does up.
As for me, I am a 928 lifer
Thanks,
Mason
09-22-2008, 09:12 PM
#45
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There seem to be plenty like you in the 928 community. Even with kits available, there are those who build their own. All the more power to you and them.
I am really just someone who wants to drive. I work on my cars out of necessity related to budget. If nothing else, when it all goes wrong on the track, I will know that I am responsible
I am really just someone who wants to drive. I work on my cars out of necessity related to budget. If nothing else, when it all goes wrong on the track, I will know that I am responsible
I'm with you, I just like to re-invent the wheel, it's a bad habit of mine. I'm totally satisfied with the power output of my meteor '85.... Just the bypass and chips made the car plenty fast for this part of the country..... I would like to have forced induction, but would prefer to do it on the later engine with it's more sophisticated dual knock sensor brain and bigger valves. HOWEVER, I do have a big new turbo , tial wastegate and intercooler with plumbing, I might try to install it one of these days.....Since it's already here and all.
Thanks,
Mason
Thanks,
Mason