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Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

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Old 01-01-2005, 11:42 AM   #1
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over the winter i'm pulling my motor and i already have a buyer lined up but i don't know what i want to replace it with? i already have a 565 lined up that runs 5.0s in a 2400lb camaro on motor it's a pat musi motor that would probably run 5.50's or so in my 3500lb turd and 5 teens on the juice. i also have acess to a 555 nitrous motor that makes 1000hp on the motor but is set up for nitrous. the question is i don't know if i want to go to tall deck stuff because then i have to change alot or just build a standard bowtie block 496-505 about 14.5-15.1cr nitrous motor that'll make about 900 or so on the motor. and no matter what i build it'll be built to take at least a 700-800 hit because i'm a nitrous junkie. i mean i didn't flinch at 500 on my little 468. so i guess this whole thing is should i say screw it and go big or keep it right around 500ci and still run low 8's on spray. at least if i keep it under 500 i can run the ls1tech outlaw class right?
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Old 01-02-2005, 09:18 AM   #2
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this is the old question "how fast do ya wanna go" is "how much $$$$ and time do you wanna spend" Personally I'd stick with the stuff you've been running since it won't be a total changeover and you can still use most of your existing stuff.

Just my $.02, good luck whatever you choose!

Derek
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Old 01-03-2005, 12:54 AM   #3
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Just because its above 505 CI doesnt mean its a tall deck. I would go with a 565. Seen them handle a ton of nitrous. The deciding factors between the 555 and the 565 you have lined up is first are they tall decks or not. And also if not which one has better cylinder heads. The short block is just along for the ride, the heads are what really matter.
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Old 01-11-2005, 08:51 PM   #4
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well i've decided what i'm going with. it's a shafiroff pro 555 http://www.shafiroff.com/555_engine.asp
it's getting all the upgrades except for the donovan block and it being setup as a full on nitrous version and the junk wiseco pistons are being replaced with je 14:8 gas ported nitrous pistons. it'll make about 1000hp with the upgrades on the motor and i've been guarenteed it will take whatever spray i want to hit it with. should run 8.60's to 8.80's on the motor and he said if i'm not scared to spray it with 600 or so it'll run 7's which all in all i'll be happy with for the price scott quoted me and i should have it in a month or so. and it's a short deck so i don't have to motor plate the car
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Old 01-11-2005, 09:33 PM   #5
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Quote:
Originally Posted by 68maro
well i've decided what i'm going with. it's a shafiroff pro 555 http://www.shafiroff.com/555_engine.asp
it's getting all the upgrades except for the donovan block and it being setup as a full on nitrous version and the junk wiseco pistons are being replaced with je 14:8 gas ported nitrous pistons. it'll make about 1000hp with the upgrades on the motor and i've been guarenteed it will take whatever spray i want to hit it with. should run 8.60's to 8.80's on the motor and he said if i'm not scared to spray it with 600 or so it'll run 7's which all in all i'll be happy with for the price scott quoted me and i should have it in a month or so. and it's a short deck so i don't have to motor plate the car
sounds like a bad *** set up man

yeha i heard they make good motors when i blow or get tired of my sbc i getting the 598 pumpgas motor that makes 835hp
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Old 01-11-2005, 10:41 PM   #6
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Quote:
Originally Posted by 68maro
well i've decided what i'm going with. it's a shafiroff pro 555 http://www.shafiroff.com/555_engine.asp
it's getting all the upgrades except for the donovan block and it being setup as a full on nitrous version and the junk wiseco pistons are being replaced with je 14:8 gas ported nitrous pistons. it'll make about 1000hp with the upgrades on the motor and i've been guarenteed it will take whatever spray i want to hit it with. should run 8.60's to 8.80's on the motor and he said if i'm not scared to spray it with 600 or so it'll run 7's which all in all i'll be happy with for the price scott quoted me and i should have it in a month or so. and it's a short deck so i don't have to motor plate the car

are you freakin kiding me?!?!?!?!?!?!?!?!?! you want to run that kind of power and trust a set of motor mounts? why? please, i need to know!

Dave
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Old 01-11-2005, 10:51 PM   #7
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Quote:
Originally Posted by eric69nova
sounds like a bad *** set up man

yeha i heard they make good motors when i blow or get tired of my sbc i getting the 598 pumpgas motor that makes 835hp

hey man........

as some in this section may have noticed, i kind of pimp Fast Times Motorworks. i've watched them for many years and dreamed of having a motor built by them, and on New Years Eve day, i got one! initially, i was going to go BBC, but the deal i got on this one, i could not pass up. originally, i was looking to buy a motor they have built and had in a magazine, a 588" BBC on pump gas. i have seen a huge number of shops build these massive motors, but none have made the power these guys have on pump gas, period! it's around 9.5:1 CR, 588 ci, Dart Big M tall deck block, (can use the standard deck height if you ask), that they said made 950hp and 880lbft, on pump gas. the motor is also capable of taking a healthy shot of N2O, but it's already got a 100+hp advantage over the Schaffiroff motor. i would highly recommend talking to these guys before any final decisions. price as of about end of summer last year was $18K. very competitive price. either way, nice power level for a street motor.

later,
Dave

btw..........that 598 runs on 94 octane minimum. personally, i've never seen anything between 93 and 100 octane at the pumps. so if you can't use 93, you have to use 100......and that's no longer a pump gas motor in most peoples books. plus it's like $4.xx/gal!!!
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Old 01-12-2005, 12:46 AM   #8
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plain and simple i don't want to motor plate the car.
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Old 01-12-2005, 09:19 AM   #9
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Quote:
Originally Posted by 68maro
plain and simple i don't want to motor plate the car.

i didn't think you had a choice when making that kind of power. are the motor mounts able to hold that kind of power? i'd hate to have you come back on here and tell us you spun the engine in the bay more than the tires in the wells!

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Old 01-12-2005, 09:55 AM   #10
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stay under 500cid.
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Old 01-12-2005, 09:56 AM   #11
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Quote:
Originally Posted by bickelfirebird
stay under 500cid.
that would be wise, just build a hot *** 496 and throw a 500 shot on that bitch
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Old 01-12-2005, 10:29 AM   #12
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why stay under 500ci?
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Old 01-12-2005, 03:55 PM   #13
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more cubes will respond better with nitrous if your heads are maxed out.don't a bbc tall deck still have regular clam shell type pads? tall deck only .400 taller so headers still ought to fit,just closer to floor pan.don't you just need longer timing chain and intake spacers?
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Old 01-12-2005, 03:55 PM
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