LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Fresh 410 Stroker Lt1 Vid.

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Old 09-20-2010, 10:58 AM
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Wow... badass. That is insanity. Jealous!
Old 09-20-2010, 02:02 PM
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Like everything it just depends on which parts you go with but that looks like nice work. As Jeff sid there are parts that take less clearancing than others though. The Cam is where things get tighter as well.[/QUOTE]

The rods came with some L-19 bolts but there was no way they were going to clear so I changed them out for some ARP2000's.
Old 09-20-2010, 04:35 PM
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Well the ARP2000s are nice as well and overkill but if you need to you can turn the heads down a bit on the L19s.
Old 09-20-2010, 10:25 PM
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Any updates with this car? i wanna see some runs or at least more vids!

Last edited by Sof86; 09-20-2010 at 10:50 PM.
Old 09-20-2010, 10:52 PM
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Music for my ears man! Sounds awesome!
Old 09-20-2010, 11:20 PM
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Originally Posted by racer7088
Well the ARP2000s are nice as well and overkill but if you need to you can turn the heads down a bit on the L19s.
Yea I didn't want to have to do that yet. Even with all that clearancing, there was some more to do on the rods. Just cranked it over for the first time today, sounded real good but the big cubes are making my cam seem tame.
Old 08-01-2011, 01:10 AM
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hey guys its been a long time ...i finally updated my username to match my ci..lol ...the motor is strong and holding up well but now im wanting a bigger cam and in need of a 12bolt or s60 rear cause my 10 bolt is hangin by a thread... havin pcm probs and replacing that asap... Hope to have updated vids soon
Old 08-01-2011, 10:38 PM
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Originally Posted by 410strokerss
hey guys its been a long time ...i finally updated my username to match my ci..lol ...the motor is strong and holding up well but now im wanting a bigger cam and in need of a 12bolt or s60 rear cause my 10 bolt is hangin by a thread... havin pcm probs and replacing that asap... Hope to have updated vids soon
Get the S60.
Old 08-01-2011, 11:37 PM
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Originally Posted by fex77k
Get the S60.
thats what I am leaning toward..really nice piece...just got to get the toy fund back up.. =)
Old 08-01-2011, 11:38 PM
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Originally Posted by transam5.7lt1
Music for my ears man! Sounds awesome!
Originally Posted by ZGOBYBY
Wow... badass. That is insanity. Jealous!
Thanks guys!
Old 08-02-2011, 01:27 AM
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here is my lt1 block cleared for the 4 in crank and 6in h beams..had to use custom small base circle cam
Attached Thumbnails Fresh 410 Stroker Lt1 Vid.-clearblock.jpg  
Old 08-02-2011, 10:28 AM
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Originally Posted by DVS LT1
My builder didn't want to go past 3.75" (383) to be on the safe side - I always dreamed about a 396 though (4.06 bore x 3.825 stroke, or 4.03 x 3.875 stroke).
A 3.875 crank can be clearanced and not need to be filled as long as the builder knows how.
Old 08-02-2011, 10:43 AM
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Originally Posted by SS RRR
A 3.875 crank can be clearanced and not need to be filled as long as the builder knows how.
yep they fit just fine
Old 08-02-2011, 10:47 AM
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Forgot to say that it also depends on the rods used. I had Eagle 6" rods and my builder said if I were to use those the block would have to be filled due to their tall rod bolts. Compstars were recommended, they were used and block fill need not apply.
Old 08-02-2011, 11:20 AM
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Originally Posted by DVS LT1
How the heck do you fit a 4" crank in an LT1 block - did you have to fill the block at all? (hit the water jacket?)

My builder didn't want to go past 3.75" (383) to be on the safe side - I always dreamed about a 396 though (4.06 bore x 3.825 stroke, or 4.03 x 3.875 stroke).
I stuffed a 3.875" in mine just fine. Its the design of the cam, rods and rodbolts that really come into play when you go for 4"


Originally Posted by SS RRR
A 3.875 crank can be clearanced and not need to be filled as long as the builder knows how.
Old 08-02-2011, 11:44 AM
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i had to use custom stroker specific rods and do a lil grinding on the boltheads for extra wiggle room....had the block sonic tested afterwards and no block fill needed. the cam is custom small basecircle comp cut for it to spec
Old 08-02-2011, 05:41 PM
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Originally Posted by DVS LT1
Interesting points about the rods, bolts, and even cam.

Still, I thought a 396 cid was pushing it (safely) for an LT1 block. I've seen a few guys running 401 cid motors and knew it was possible (although most people tend not to advertise if their blocks had to be filled).

410 sounds badass.
We used a sonic checker to stay out of the water jackets. My 95 vette block didn't have too much core shift. it does have a liner in it thou.
Old 08-03-2011, 08:22 AM
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Originally Posted by 410strokerss
hey guys its been a long time ...i finally updated my username to match my ci..lol ...the motor is strong and holding up well but now im wanting a bigger cam and in need of a 12bolt or s60 rear cause my 10 bolt is hangin by a thread... havin pcm probs and replacing that asap... Hope to have updated vids soon
Put a solid roller in that sucker. The next engine I build will have a solid roller cam in it.
Old 08-03-2011, 11:28 AM
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Originally Posted by DVS LT1
Is there any minimum (or desired) tolerance when it comes to how close you can dig next to the water jacket? I understand that some people are better at clearancing a block than others; some can do it, others punch through it - and there are tools to help. Should you be pleased if you manage to fit a big crank in the block and the material left in front of the jacket is paper thin?
I have LT1s that are .040 and .030 you need to sonic test them if you want to go crazy. You can go .060 but you have to check that. I sonic tested .140" wall thickness between cylinders and .240" thickness the other way. Also my block had almost no core shift.

Some people say .100" is the min wall thickness, however if you hardblok fill it you can make the wall paper and still get "some" runs out of it.

Last edited by fex77k; 08-03-2011 at 11:40 AM.



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