ENGINE question (help me out)
09-15-2005, 07:09 PM
#1
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ENGINE question (help me out) Sup ls1tech. Well, my engine is now done for and i'm in the market for a new one. A BIG one. What is the largest engine that can fit in a 98 m6 trans am? i've been told by a couple local friends that at 427ci is the limit. True or not? Second, i've done some research and found that the *new* 427 on a car parts site i use alot sells for around $13,000...
Even though it lays down 500, that price is killer. And what is the deal with the 408 being $8,000... HUGE price jump. Anyways, i was looking for some suggestions on what to do, and what engine to put in. Personally, i either want the big engine and loap cam, or a smaller engine with a rear mount turbo. Either way it's some fun to play with. What enginges do you suggest that arn't killer prices (8-9 g's and down), and what larger engine would you suggest. PM personal testemonies if you have been down this route, or leave a post to enlighten me and the rest of us know-nothings like me on here.
Thanks,
BorgerTransAm
Chris
Even though it lays down 500, that price is killer. And what is the deal with the 408 being $8,000... HUGE price jump. Anyways, i was looking for some suggestions on what to do, and what engine to put in. Personally, i either want the big engine and loap cam, or a smaller engine with a rear mount turbo. Either way it's some fun to play with. What enginges do you suggest that arn't killer prices (8-9 g's and down), and what larger engine would you suggest. PM personal testemonies if you have been down this route, or leave a post to enlighten me and the rest of us know-nothings like me on here.
Thanks,
BorgerTransAm
Chris
09-16-2005, 12:19 AM
#4
all depends on what you want. a post by Kp put things in perspective for me a while back. it his dyno overlay of his high compression all out 414 vs a stock shortblock with a P1 or D1 at ~10psi. both setups were good for 10's at ~130, however the FI setup was much more streetable.
as far as cubes go with the new 4.200 darton sleeves (out now in limited supply but more on the way) and a 4" stroke you can achieve 443ci. with a 4.125 stroke, 457ci. or go 4.125 bore and 4" stroke for the 427. a block with the 4.160 (max bore) ready for final hone will run you ~3400 bucks. dont know the pricing on the new 4.200 setups yet. rotating assembly will depend on the quality of parts.
as far as cubes go with the new 4.200 darton sleeves (out now in limited supply but more on the way) and a 4" stroke you can achieve 443ci. with a 4.125 stroke, 457ci. or go 4.125 bore and 4" stroke for the 427. a block with the 4.160 (max bore) ready for final hone will run you ~3400 bucks. dont know the pricing on the new 4.200 setups yet. rotating assembly will depend on the quality of parts.
09-18-2005, 04:15 PM
#6
Originally Posted by jrp
all depends on what you want. a post by Kp put things in perspective for me a while back. it his dyno overlay of his high compression all out 414 vs a stock shortblock with a P1 or D1 at ~10psi. both setups were good for 10's at ~130, however the FI setup was much more streetable.
Has anyone done a price comparo on buying a new forged 347 vs an LS2 402 vs a sleeved darton 4.2" vs the dry-sleeved LS2 4.125?
And if budget is an issue, can any of those blocks be run with stock heads until money arrives?
'Course I don't know how much of his motor is broken... is your block okay? What would be the cost of a forged 347 vs a stroker? (minimal, I assume) If one did get a 4" stroke, could it be re-used if a different block were later purchased?
09-18-2005, 05:14 PM
#7
I've seen forged 347's go for around 2800. Personally, I'd go with bigger cubes b/c there's just no replacement for displacement. It's a much better starting point for future mods if you're looking high HP. I just got my 408 built HPE for around $3700, Eagle crank, Callies Rods, Diamon pistons, Federal Mogul/Clevite bearings, etc. To me, that price is unbeatable for the starting point it gives you. Contact HPE, LME, FFHP, etc for shortblock pricing on 402's/408's... you'd be surprised how cheap they are now.
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09-18-2005, 05:41 PM
#8
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Originally Posted by black_knight
Assuming that he's replacing a broken motor, he'd have to buy SOME kind of motor to hook up that blower to... so it might shift the cost balance a bit.
Has anyone done a price comparo on buying a new forged 347 vs an LS2 402 vs a sleeved darton 4.2" vs the dry-sleeved LS2 4.125?
And if budget is an issue, can any of those blocks be run with stock heads until money arrives?
'Course I don't know how much of his motor is broken... is your block okay? What would be the cost of a forged 347 vs a stroker? (minimal, I assume) If one did get a 4" stroke, could it be re-used if a different block were later purchased?
Has anyone done a price comparo on buying a new forged 347 vs an LS2 402 vs a sleeved darton 4.2" vs the dry-sleeved LS2 4.125?
And if budget is an issue, can any of those blocks be run with stock heads until money arrives?
'Course I don't know how much of his motor is broken... is your block okay? What would be the cost of a forged 347 vs a stroker? (minimal, I assume) If one did get a 4" stroke, could it be re-used if a different block were later purchased?
Engine is gone, so yes there basically is not alot usable, other than the basics and the stock heads. I really dont know the full extent of damage done, but will post later the exact parts and pricings.
Thanks for the advice everyone.
09-18-2005, 08:18 PM
#9
Even if it is off-topic at this point, I still think the answers to my questions might be helpful to a lot of people. If anyone knows, I'd still be interested to hear.