What to go with big stroker or 414"?

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Jun 17, 2006 | 12:21 PM

David Gordon

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From: Granbury Texas

What to go with big stroker or 414"?

I was wanting more power over my 395" 489 rwhp I have now, plus this motor is a couple years old. Should I go with a resleeved block and LS7 heads or just get a LS2 block and go for 414 cu.in. I would be satisfied with 550 to 560 rwhp and I have seen some 402s get that. I was thinking with the better casting heads and all it would be cheaper to go with the 4.125 stroke LS2. What do you guys think. Or should I spend the extra for a resleeved block for 440 cu. in. I am not looking for an all out 600 rwhp car jus mid 500s would be ok with me. Either case I could reuse my crank I have now.

Jun 17, 2006 | 03:43 PM

Randy WS6

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From: Baxter,KY.

I built a 418cid. from a aluminum LS2 bored 4.030". Eagle 4.100" crank & 6.125" rods .Not got the motor in the car yet ,but it will be next week.

Jun 17, 2006 | 05:15 PM

verbs

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600 cubes or bust

Jun 17, 2006 | 09:33 PM

Beast96Z

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I'd bore the LS2 block 4.020" and reuse your 4.125 crank. Use the extra money for some bad *** heads and you should hit your goal easily.

Jun 18, 2006 | 03:42 PM

David Gordon

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What cubic inches would come from the LS2 bore and a 4.125 crank?

Jun 18, 2006 | 03:55 PM

VIPRETR2

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~418cid w/ 4.020 bore
~414cid w/ 4.0 bore

http://www.c5frc.com/calculators/Com...Calculator.htm

Jun 18, 2006 | 03:57 PM

violator6090

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why not keep the motor an add a blower?

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Jun 18, 2006 | 11:52 PM

strokedls1

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I would do the ls2 block with some ls7 heads. The flow on the ls7 intake is worth it.

Jun 19, 2006 | 02:47 AM

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kumar75150

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doesnt he need a bigger bore than the ls2 block to support ls7 heads?

if u want to be 100% assured of getting 550+, go ahead and do a 447 or something similar.

Jun 19, 2006 | 08:15 AM

#11

David Gordon

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From: Granbury Texas

doesnt he need a bigger bore than the ls2 block to support ls7 heads?

if u want to be 100% assured of getting 550+, go ahead and do a 447 or something similar.

I would like to know this also.
Texas Speed put out a 402 that made like 540 hp or something close to that.

Jun 19, 2006 | 10:53 AM

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strokedls1

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Your right. I was thinking of the big bore block sleeved. 4.100 bore is minimum. I would go as big as you can now, because you will always want more later. ETP LS7 heads will work on a 4" bore if you want to stay with a ls2 stock block.

Jun 19, 2006 | 05:31 PM

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Beast96Z

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From: Shreveport, LA

Quote:

Originally Posted by David Gordon

I would like to know this also.
Texas Speed put out a 402 that made like 540 hp or something close to that.

I'm all about going bigger, as you can tell from my sig, but for the power your wanting, you don't need all that stuff. The 410-420 ci range with ETP 225's/ or AFR 225 and a ported FAST will get you what you want. Use the $3k you save on a block for something else you need.